ML20054K632
| ML20054K632 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 04/30/1982 |
| From: | VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | |
| Shared Package | |
| ML20054K620 | List: |
| References | |
| NUDOCS 8207020398 | |
| Download: ML20054K632 (580) | |
Text
{{#Wiki_filter:ENVIRONMENTAL STUDY OF LAKE ANNA, VIRGINIA NORTH ANNA POWER STATION ANNUAL REPORT VOLUMEI January 1 - December 31, 1981 vYw
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Environmental Services Department Virginia Electric and Power Company P. O. Box 26666 Richmond, Virginia 23261 8207020398 920630 April.1982 PDR ADOCK 05000338 R PDR
Environmental Study Of
- Lake Anna, Virginia .
North Anna Power Station Annual Report January 1, 1981 - December 31, 1981 Volume 1 Prepared by: Environmental Services Department Virginia Electric and Power Company P. O. Box 26666 Richmond, Virginia 23261 April 1982 ~~ wa
TABLE OF CONTENTS VOLUME 1 Page introduction . . . . . . . . . . . . .. . ... . . . . . . . . . . . 1 Station Operation . . . . . . . . . .. . .. . .. . .. . . ... . 8 Physical and Chemical . . . . . . . .. . .. . . . . .. . . . . . . 13 Endeco . . . . . . . . . . . .. . . . . . . . . . . . . . .. . 17 Synoptic Temperature Surveys . . . . . . . .. . .. . .. .. . 18 Water Quality . . . . . . . . . . . . . . .. .. .. . . . .. . 19 Nutrients . . . . . . . . . . .. . . .. . . . . . . . . . .. . 22 Heavy Metals . . . . . . . . . . . . . .. . . . .. . . .. . . 24 Zooplankton . . . . . . . . . . . . .. .. . . . . . . . . . .. . . 178 Benthic Macroinvertebrates . . . . .. . . . . .. . . . . . . . . . . 222 Special Studies: Ekman Dredge Collection of Corbicula fluminea . . .. . .. . . . . . . . . . 231 Entrainment . . . . . . . . . . . . .. . . . . . . . .. . ... . . 253 VOLUME 2 Ichthyoplankton Tows . . . . . . . . .. . . . . . . . . . . . .. . . 276 Ichthyoplankton Culture . . . . . . .. . . . . .. . . .. . . . . . 344 Impingement . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 354 Fishes . . . . . . . . . . . . .. . .. . . . . . . . . . . .. . .. 373 Electroshock . . . . . . . . . .. . . . .. . . . . . . . . . . 379 Gill Net . . . . . . . . . . ... . . . . . . . .. . . . . . . 388 Rotenone . . . . . . . . . . . .. . . . . . . . . . . . . . . . 396 Fish Food Study . . . . . . . . . .. . . . . . . . . .. . . . . . . 492 Striped Bass . . . . . . . . . .. . . . ... .. . . . .. . . 494 Largemouth Bass . . . . . . . . . . . . . .. . . . . . . . . . . 495
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TABLE OF CONTENTS VOLUME 2 (Cont'd) Page Fish Fecundity Study . . . . .... . . . . . . . . . . . . . . . . . 508 Female Largemouth Bass .... . . . . . . . . . . . . . . . . . 512 Male Largemouth Bass .... . . . . . . . . . . . . . . . . . . 515 Female Striped Bass . . .. . . . . . . . . . . . . . . . . . . . 516 Male Striped Bass . . ...... . . . . . . . . . . . . . . .. 516 Fish Age and Growth Study ....... . . . . . . . . . . . . . . . 543 Largemouth Bass . .. .. . . . . . . . . . . . . . . . .. . . . 546 Striped Bass . . .. .. . . . . . . . .. . . . . . . . . . . .. 550 Waterfowl Study ... .. .. . . . . . . . . . . . . . . . . . . . . 559 Sununary and Conclusions . . ..... . . . . . . . . . . . . . . . . 565
E h I i I m l Introduction
I t!TRODUCT I O!! Over the past decade many studies have been conducted by electric utilities concerning the effects of a once-through cooling process on aquatic ecosystems. Environmental concerns involve impingement (the entrapment of fishes on intake screens), entrainment (the intake of plankton through th'e cooling system), and the effects of the heated waste-water discharge on the receiving biota. The Electric Power Research Institute prepared an annotated bibliography on impingement (Uziel and Hannon 1979) and entrainment (Carrier and Hannon 1979) and proceedings from several symposia have been published on thermal effects (Gibbons and Sharitz 1974; Esch and McFarlane 1976; Van Winkle 1977). An alteration to an aquatic ccosystem may result in an undesirable envi ronmental condi tion; however when found, intake and thermal effects are generally not considered to be irreversible. Conclusions from an e*ght year ecological study on the Connecticut River, which receives heated waste-water from the Connecticut Yankee Atomic Plant, suggested that no significant adverse changes to the biota had taken place due to the elevated water temperatures (Merriman and Thorpe 1976) . Cairns (1976) gives several reasons why subtle perturbations of aquatic ecosystems are difficult to discern. An aquatic monitoring program should involve obtaining reliable and appropriate ecological data with an adequate background data base in order to distinguish normal successional changes from direct thermal effects. In 1972, Virginia Electric and Power Company impounded the f! orth Anna River creating Lake Anna, which consists of a 3C87 hectare lake (Reservoir)that provides condenser cooling water for its i orth Anna fluclear Power Station and a 1377 hectare Was te Hea t Treatment Facil i ty (W.H.T.F.) tha t receives the heated discharge and transfers the heat from the water to the atmosphere (Figure 1-1). The W.H.T.F. is separated from the Reservoir by three earthen dikes. Hea ted was te-wa ter in the W.H.T.F. enters and mixes with the Reservoir water only through a submerged opening discharge structure in the last dike near the main dam. The maximum aT across
3-the station condensers is 7.8 C with e discharge rate of 60 m 3/see for each unit. Presently two nuclear units have been declared in commercial operation with a total rated capacity of 1755 megawattn. A third unit is under construction with l a scheduled commercial date of 1989 ] Lake Anna is located in Loulsa, Spotsylvania and Orange Counties within the Piedmont Province of Virginia (Figure 1-1). flormal pool elevation is 76.2 m (250 feet). The Reservoir was filled from the drainage basins of the i florth Anna River, Contrary Creek, Pan unkey Creek and several first order streams. The W.H.T.F. was inundated by water 1,acked through the third dike opening, and by water from the drainage basins of six creeks: Sedges, Elk, Millpond, Moody, i
- Coleman and Rock. Contrary Creek han received considerable recent attention because of extensive pyrite mining operations from 1882-1920 which has resulted 4
in acid and metal drainage leaching f rom creek side tallings piles (Reed and Simmons 1972). The impounding of the florth Anna River apparently has ameliorated ' the effects of Contrary Creek on the river (Reed lo79a, 1980a, 1981a). Lake Anna is 27 km long with 322 km of shoreline. The region is relatively undeveloped with the terrain consisting primarily of large tracts of agricultural and timber land. The mean depth of the lake is approximately 8 m with the deepest portion (24 m) near the main dam. Predominant aquatic macrophytes along the shoreline include broadleaf cattall (Typha l a t i fo l l a) , i pondweed (Potamogeton sp.), spike rush (Eleocharis sp.), bushy pondweed (flajas sp.), burreed (Sparganium americanum) and arrowhead (Sagittarla sp.). Several ecological pre-operational reports (Reed and Simmons 1976; Reed 1976, 1978; Simmons 1977) and post-operational reports (Reed 10706, 1980h, 1981b) for Lake Anna have been submitted to the Virginia Electric and Power Company. These studies have shown that there has been no significant adverse J impact on Lake Anna as a result of the construction and operation of florth Anna Power Station. The present study summarizes the physical, chemical and biological data collected from Lake Anna, Virginia from January through December
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, 1981. The objective'was . to deternIne the ef feets, i f any, of the operation of North Anna Power Station on the ecology of Lake Anna, When appropriate
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I cephasis was placed on compar'ing environmental properties between the W.H.T.F. l' ' and Reservoir through both the present, as well as past studies. i l ,
> Previous studies at Lake Anna have been submitted to the Virginia
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; State tlater Control Board,(NPDES Permit No.'VA0052451) and/or the United States HuclearRegulatorybommission(EnvironmentalTechnicalSpecifications,
~ Docket Ncs. 50-338,~50-339) as, quarterly or annual non-radiological envi ronmental i reports. Several section's in this report are included this year for the first 1 l time (e.g. Striped bass age and growth, waterfowl surveys, Corbicula study, I ichthyoplankton tcw studies, ichthyoplankton-culture, etc) and although they are not specifically required by a regulatory agency they are included because these I programs during 1981 were considered as part of Vepco's overall ef fort to scleatifically evaluate any potential station impact and to enhance the environmental program at Lake Anna. i 4 4 e s Y r / f r h i I 7
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Literature Cited Cairns, J. L. Jr. 1976. Heated waste water ef fects on aquatic ecosystems. Thermal ecology ll, National Technical Information Service, Conf - 750425 Springfield, Virginia, USA. F Carrier, R. F. and E. H. Hannon. 1979 Entrainment: An annotated bibliography. Electric Power Research Institute, EA-lq49, Project R77 Palo Alto, California, USA. Esch, G. W. and R. W. McFarlane, editors. 1974 Thermal ecology 11. National Technical information Service, Conf - 750425. Springfield, Virginia, USA. Gibbons , J. V. and R. R. Shari tz. edi tors ,1974. Thermal ecology, National Technical Information Service, Conf - 730505 Springfield, Virginia, USA. Herriman, D. and L. M. Thorpe, editors.1976. The Connecticut River ecological study: the impact of a nuclear oower plant. Monograph of the American Fisheries Society No. 1. Cat. No. 76-11293. Reed, J. R. and Associates, Inc. 1976. Annual Report: Env ironmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company. Richmond, Virginia, USA.
. 1978. Annual Report: Environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company.
Richmond, Virginia, USA.
. 1979a. Annual Report: An ecological investigation of the Lower North Anna River. Prepared for Virginia Electric and Power Company. Richmond, Virginia, USA.
. 1970b. Annual Report: Environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company.
Richmond, Virginia, USA.
. 1980a. Annual Report; An ecological investigation of the Lower Horth Anna River. Prepared for Virginia Electric and Power Company. Richmond, Virginia, USA.
. 1986b. Annual Repo r t : Environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company.
RI,hmond, Virginia, USA.
. 1981a. Annual Repo r t : An ecological investigation of the Lower North Anna River. Prepared for Virginia Electric and Power Company. Richmond, Virginia, USA. *
. 1081b. Annual Report : Environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company.
Richmond, Virginia, USA. 6
~ _ _ _ _ _ _ _
6- ,
. and G. M. Simmons. 1972. An ecological investigation of the Lower I
North Anna and Upper Pamunkey River System. Prepared for Virginia i Electric and Power Company, Richmond, Virginia, USA. ' i
; . and G. M. Simmons. 1976. Final Report: Pre-operational environmental i study of Lake Anna, Virginia. Prepared for Virginia Electric and Power ! Company. Richmond, Virginia, USA. I l S i mmon s , G . M . J r. 1977 Annual Report: Pre-operational environmental study of , ! Lake Anna, Virginia. Prepared for Virginia Electric and Power Company. '
j Richmond, Virginia, USA. j Uziel, M. S. and E. H. Hannon. 1979, impingement: 'An annotated bibliography. Electric Power Research Institute, EA-1050, Project 877. Palo Alto. 4 California, USA. Van Winkle, W. , editor.1977 Assessing the effects of power-plant-induced mortality on fish populations. Oak Ridge National Laboratory, Tennessee. Library i of Congress Cat. No. 77-81956. 4 l l l !I l 4 1 1 l. 4 l J I
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INTRODUCTION Daily records of station operation were compiled to demonstrate the extent and duration of thermal influence on the water used to cool Vepco's North Anna Power Station Units I and 2. Eight circulating water pumps (4 C.W.P. s/ unit) at the intake structure, each rated at 13 9 m3 /s (486.5 cfs), draw water from the 3885 hectare Reservoir and send it through the power station, discharging the heated effluent into a 1376 hectare Waste Heat Treat-men t Faci l i ty (W.H.T.F. ) . Three of four circulating water pumps are required to be operating for each reactor on line. Units I and 2 have combined capa-bilities to produce 1755 MWe at full power, and Unit 3, scheduled to come on line in October,1989, will have a rated capacity of 907 MWe. The extent of environmental influence received by Lake Anna is di rectly related to station operation. By integrating these wi th other recorded data, especially meteorological data, a greater understanding of the system may be attained. METHODS AND MATERI ALS The operators in the North Anna Control Room record hourly power levels (%) for the reactors in 1-Log-3 and 2-Log-3 Circulating water pump operation is logged every four hours in Backboard Log 1-Log-6A. These logs are retained in the Records Building Vault on si te for long-term reference use. RESULTS AND DISCUSSION Station daily power level (%) and C.W.P. operation during 1981 are shown graphically for Unit 1 (Figure 2-1) and Unit 2 (Figure 2-2). Table 2-1 summarizes the power level and C.W.P. operation by month.
i During the entire period f rom January through March, Unit I was in an outage. By May and through most of June it was operating steadily at full power. Between the end of June and middle of July, Unit I tripped five times and was always taken back up to full power within two or three days. Unit 1 incurred one other major outage in October. Three C.W.P. s for Unit 1 started up in late March and operated continuously for the duration of 1981. The fourth C.W.P. for Unit I ran intermittently in early summer and then steadily until mid-October. Unit 2 had a brief outage in May and a major outage from mid-June until September. Except for those two periods and occasional trips, Unit 2 ran at full power. These C.W.P.'s operated continuously until early May when they were shut down during the Unit 2 outage. A week later they were restarted and continued service for the remainder of 1981. The fourth C.W.P. for Unit 2 operated intermittently during the spring and steadily through the fall.
SUMMARY
- 1) Both Units 1 and 2 operated at full power during 1981 except for the following periods - from January until April (Unit I major outage), during May (Unit 2 minor outage), from mid-June until September (Unit 7 major outage) and during October (Unit 1 outage). ;
- 2) A minimum of three C.W.P. s were operated for each reactor in service.
TABLE 2-1.
SUMMARY
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; February 0 97 0 3 March 0 91 0 3 Ap ri l 45 92 4 4 May 100 55 4 3 June 96 58 4 3 July 93 0 4 3 August 91 13 4 3 September 91 87 4 4 October 20 95 3 4 November 87 97 3 4 i
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l l s h j Physical and Chemical I i .i 1 a f
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INTRODUCTION The primary influence that the North Anna Power Station has on Lake . Anna water quality is the result of the introduction of heated water to the lake near the dam. This thermal effluent has circulated by means of eight circulating water pumps located at the power station intake structures through the WHTF to be cooled prior to entering the Reservoir. Most of this pumped volume is pulled upstream to the intake structure and is recirculated through the station. The ratio of pumping capacity to average discharge from the dam to the North Anna River is large, and it becomes apparent that the power station C.W.P. s are the major source of current during full operation and average flow conditions in the Reservoir and WHTF. Water quality studies were continued in 1981 on the Reservoir and WHTF consistent with previous programs. These studies include testing for temperature, dissolved oxygen, pH, alkalinity, turbidity, ammonia, phosphates, nitrates, sulfates, iron, copper, zinc and lead. Results are compared only with the 1976 EPA Quality Criteria for Water, since standards set forth by the Virginia State Water Control Board apply to domestic water supplies and free-flowing streams. Criteria are not presented as absolute values for water quality and do not have regulatory use but rather are designed to provide long-term protection. Ideally, criteria development would involve a large percent- . age of the aquatic species, and deal with community response to ranges of concentrations for specific substances over long time periods. But as they now exist, they cannot protect all organisms to the same extent within a given ecosystem. Chronic effects are difficult to assess because they affect popu-lations or generations rather than a single Individual and can cause anything
i from stress to reproductive failu,re and population declines. Criteria form I the basis for sound judgements taking into account local conditions in each situation - water use, background levels of other constituents, occurrence of particular species, community types, temperature, weather, flow, economic consid-erations, the importance of a particular ecosystem and the degree of safety desired for it. Temperature monitoring programs are of high priority in the study of Lake Anna. Two of these programs, Endeco and Synoptic, have been on-going since 1973 as required by NPDES Permit # VA 0052451. The objectives of physical and chemical analyses of Lake Anna water are to determine the effects, if any, of the North Anna Power Station on Lake Anna water quality. These data should be superimposed on meteorological and station operation data for a more thorough perspective. METHODS AND MATERIALS Endeco Type 109 Recording Thermographs (Environmental Devices Corpo-ration, Marion, Massachusetts) were used to obtain filmed hourly records of water temperatures at selected stations (Figure 3-1). These instruments are fixed on stationary buoys and are retrieved by S.C.U.B. A. diver. ^c. a !- ?.en ance and processing on a bimonthly basis. There are nine Endeco stations in the Reservoir and W.H.T.F., and three in the North Anna River (discussed in the
" Downstream" section of this report). In Table 3-1, a letter (T, M or B)
- following the station name Indicates a recorder located at the surface (top),
mid-depth or bottom, respectively. Stations NALTHIS, NALBRPT, NAL208, NAL719N, i and NAL7195 have recorders located at each of the three depths. In Table 3-1, absence of the location code letter indicates that the instrument is located at the surface only. Stations wi th surface recorders only are NALINT, NADISC1, NAWHTF2 and NAWHTF3 I
Whi tney Models TC-5C and TC-5 Field Thermometers (Montedoro-Whitney Corporation, San Luis Obispo, California) were used in synoptic temperature surveys where four teams monitored a total of 17 stations (Figure 3-2) recording hourly temperatures at each meter during daylight hours. These surveys were conducted in February, May, September and November on a quarterly basis (September was included due to instrument malfunction in August when the survey would normally have been taken). , Monthly water samples, drawn from 12, stations in Lake Anna during 1981 (Figure 3-3), were collected from the surface, mid-depth and Just above the bottom at each station to avoid disturbing bottom sediments. These monthly samples were analyzed for pH, alkalinity and turbidity. In addition, coincident with the collection of these samples, vertical proflies were measured for temperature and dissolved oxygen at each meter from surface to bottom. Quar-terly water samples (Figure 3-3) for heavy metals were collected in March, June, September and December at eight water quality stations from the surface, mid-depth and bottom and analyzed for Iron, copper, zinc and lead. Qua rte rly nutrient samples were taken from six water quality stations (Figure 3-3) and analyzed for ammonia nitrogen, nitrate nitrogen, total phosphate, orthophos-phate, metaphosphate and sulfate. The following instrumentation and method-ologies were used in the analyses of the parameters mentioned above: Corning pH Meter Model 7 (pH), Potentiometric Titration (alkalinity), Portable Field Turbidimeter Fisher Model DRT-15 (turbidity), Whitney Model TC-SC or TC-5 Field Thermometer, Montedoro-Whitney Corporation, San Luis Obispo, California (temperature), Yellow Springs Instrument Company Model 54 (dissolved oxygen), Atomic Absorption Spectrophotometry Flame technique (iron, copper, zinc and lead), Orion Spect fic lon Electrode method (ammonia nltrogen, nitrate nitrogen),
and Turbidimetric method (sulfate). These methods are found in the 14th Edition of Standard Methods for the Examination of Water and Wastewater, 1976. RESULTS AND DISCUSSION Endeco The 1981 Endeco temperature data are summarized (Table 3-1) in terms of monthly maximum, mean and minimum values for selected stations (Figure 3-1). Daily temperature means were plotted for surface, mid-depth and bottom instru-ments at stations NALTHIS, NALBRPT, NAL208, NAL719N and NAL7195 (Figures 3-4 through 3-8) and for surface instruments at stations NALINT, NADISC1, NAWHTF2 and NAWHTF3 (Figure 3-9). The discharge canal of the W.H.T.F., which receives water pumped directly from the North Anna Power Station, consistently reflected ma> imum water temperatures compared with all other stations in Lake Anna. Exceptions occurred during the Unit 1 outage period from January to April and when Unit 2 tripped, resul ting in rapid temperature declines (Figure 3-9) . During normal station operation, relative surface water temperatures decreased as the distance of these stations from the discharge point increased - NADISCI > NAWHTF2 > NAWHTF3 > NALBRPT > NALTHIS > NALINT. The lowest water temperature recorded in Lake Anna in 1981 occurred at station NAL208 in the epillmnion during January (Table 3-1). The broad expanse of water and wind action at this station can perhaps explain why these temperatures fell below those of the shallower but more protected upper Reser-voir stations. Through February and March surface waters began to warm slightly while the hypolimnion sustained low temperatures. The deep lower Reservoir r station NALBRPT experienced the lowest temperature readings from April through September with pronounced stratification in the summer (Figure 3-5).
From October to December the shallower upper reaches of the Reservoir, at stations NAL719N (Figure 3-7) and NAL7195 (Figure 3-8), cooled uniformly prior to the main body of Lake Anna.
~
Synoptic Temperature Surveys The results of the synoptic temperature surveys are listed in their ent' aty (Tables 3-2 through 3-5). General trends were observed relating to temperature stratification and daily surface changes at the selected stations (Figure 3-2). Surface water temperatures in February (Table 3-2) ranged from 4.2 C in the upper Reservoir (station N) to 8.0 C in the lower Reservoir (station C). Inverse stratification was not evident during this month nor expected since surface temperatures were greater than 4.0 C. Direct stratifi-cation was only slightly evident because of seasonally low temperatures. Daily temperature fluctuations in lower and mid-Reservoir surface waters (0-4 meters) averaged near 1 C (s tations A, B, C, E, F, G, H, I,J). During the February survey, station D had the smallest daily surface temperature fluctuation, possibly because l'. was located where water is discharged from the W.H.T.F. The continuous flow of heated effluent ilkely stabilized surface water tempera-tures and masked potential solar additions. The largest daily temperature variation during this survey occurred at the station H surface (1 9 C). In May (Table 3-3) surface temperatures ranged from 18.2 C in the upper Reservoir (station N) to 21.2 C in the lower Reservoir (station A). Daily fluc-tuations in surface water temperatures were greatest (1.9 - 2.3 C) at the bridge stations 0, P and Q where depths were relatively shallow (9-10 meters). Although stratification was beginning to occur especially at the deeper stations in the lower Reservoir, thermoclines had not yet been established.
1 The September synoptic survey (Table 3-4) recorded surface water temperatures from 25,1 C at station N in the upper Reservoir to 27.8 C at station F in the mid-Reservoir area. Of the four 1981 synoptic surveys, daily epilimnetic temperature fluctuations were mininal during September (< I.0 C) for all stations. However, daily hypolimnetic variations at station A, C, 0, P and Q ranged from 1.0 - 1.2 C. Thermoclines were not apparent and occurred prior to September as confirmed by other data, in November (Table 3-5) surface water temperatures ranged from 10.3 C at station P in the North Anna Arm to 16.1 C at station D in the lower Reservoir. Daily temperature fluctuations were very small in the main Reservoir (stations A-J) and slightly more variable in the upper Reservoir (stations K, M, 0, P and q). Water Quality Temperatures were measured at selected water quality s tations (Figure 3-3) In conjunction with monthly water quality sampling in Lake Anna during 1981. The temperature measurements were taken at each meter from surface to bottom and compiled to produce isothermic patterns (Figures 3-10 through 3-19) for each station. The resulting annual temperature cycles should be examined with close reference to the map of station locations (Figure 3-1). These cycles are general in nature, based only on monthly temperature profiles and do not dis-close subtle dally fluctuations. Lake Anna is a borderline dimictic lake. A dimictic lake is one that has two complete bottom to top circulations per year occurring in the spring and the fall. Direct stratification is evident at all stations during the warmest months. Although it is not obvious f rom the i so the rms , inverse stratification was present in the winter when water temperatures dropped below 4 C (Figures 3-3, 3-4, and 3-5). In Lake Anna, periods of ice cover and inverse stratifi-1
cation are typically of short duration and do not occur at all stations. The areas outside the influence of the thermal discharge from the power stations (Figures 3-9, 3-10 and 3-11) more frequently develop ice cover during periods of freezing temperatures, while the main areas of the Reservoir and W.H.T.F. do not. Direct thermal stratification occurred at all stations during the summer months of 1981. As surface temperatures increased, the density gradient and resistance to mixing became more pronounced especially at those stations with substantial depth and which were thermally af fected by the power station. In June and July, the thermoclines gradually deepened in response to thermal influence by the power station and solar penetration (Figures 3-10 and 3-18). The most apparent power station effect is presented in isotherms derived f rom the intakes (Figure 3-11) and the Lagoon 1 (Figure 3-15) temperatures. The power station draws water from the upper Reservoir - the North Anna River, Pamunkey Creek, Pigeon Creek, Contrary Creek and Sturgeon Creek; and from the lower Reservoir it uses water that is drawn upstream by the power station circu-lating pumps. The upper Reservoir is generally shallow compared wi th the lower Reservoir, and is more rapidly influenced by atmospheric changes than a deeper body of water would be. In January and February the temperature increase from the intakes to Lagoon I was 7-9 C, while during July and August the difference was 4-6 C. The highest temperature recorded during these monthly surveys was 33.6 C in July at the Lagoon 1 station. All raw water quality data are listed by month, January through December, in Tables 3-6 through 3-17, respectively, in the discussion that follows, a month will be referred to instead of a table number. The dissolved oxygen concentrations in Lake Anna's epilimnion during 1981 ranged frai 13 2 mg/l at the intakes in January to 5.2 mg/l at Pamunkey
Arm in August. High levels in surface waters were also recorded from Lagoon 1 in January (13.2 mg/1) and the North Anna Arm in February (13 0 mg/1). Lower dissolved oxygen levels were observed at the intakes in August (5 9 mg/1) as well. Based on annual means (Table 3-18), the surface dissolved oxygen concen-tration occurred in decreasing amounts at these stations as follows: North Anna Arm > Rt. 208 Bridge > Contrary Creek Bridge > Pamunkey Arm > Intakes > Contrary Creek Bay > Millpond Creek, Elk Creek > Lagoon 1, Lagoon 2 > Lagoon 3 > Dam. Dissolved oxygen is an inverse function of water tenperature and it follows that the percentage of dissolved oxygen based on saturation levels can be calculated given those parameters. The percentage of dissolved oxygen saturation in the surface waters in Lake Anna in 1981 ranged from 120.1% in January at Lagoon 1 to 64.2% in August at the Pamunkey Arm station. Based on annual means (Table 3-18), the surface dissolved oxygen saturation percentages occurred in decreasing amounts at these stations as listed: Lagoon 1 > Elk Creek > Lagoon 2 > Millpond Creek > Contrary Creek Bay > North Anna Arm > Contrary Creek Bridge > Lagoon 3 > Rt. 208 Bridge > Pamunkey Arm > Intakes > Dam. It appears that the power station does influence the oxygen carrying capacity of the circulating water. While oxygen levels in the epillmnetic waters of the W.H.T.F. were lower in comparison to the Reservoir, the percent saturation of dissolved oxygen was higher in the W.H.T.F. despite elevated temperatures there. The cooling water was supersaturated with dissolved oxygen probably as a result of the physical aeration by the C.W.P. s. Alkalinity values were highest in the upper Reservoir (25.8 mg/l as CACO 3
, North Anna Arm surface sample in May) and lowest in Contrary Creek (3.0 mg/l as CACO 3
, Contrary Creek Bridge bottom sample in March). Based on annual means (Table 3-18), the alkalinities ranged from high to low at these stations as follows: North Anna Arm > Pamunkey Arm > Dam > Rt. 208 Bridge, Lagoon 1 >
Millpond Creek, Elk Creek, intakes > Lagoon 2, Lagoon 3 > Contrary Creek Bay > Contrary Creek Bridge. The alkalinity values for Lake Anna in 1981 were generally less than those observed in the past (Reed 1979,'1980, 1981). They were also below the recemmended 20 mg/l as CACO 3 advised by the National Technical Advisory Committee (1968) and established as a criterion for freshwater aquatic life, except where natural concentrations are less. The mean natural alkalinity in Lake Anna was slightly less than 12.0 mg/l CACO 3 for 1981. Waters with low alkalinities lack the ability to buf fer naturally occurring pH changes and have diminished capacities to complex heavy metals and thereby reduce their toxicities (V. S. EPA 1976). The pH ranged (Table 3-18) from 3.9 (Contrary Creek Bridge, botton sample collected in January) to 7.5 (Elk Creek, mid-depth sample collected in Ap ri l) . The low pH of Contrary Creek is not atypical compared wi th previous years (Reed 1978, 1979, 1980, 1981), and is the result of acid-mine drainage from sources above the impoundment. The mean pH of Lake Anna water for 1981 was 6.8. The highest turbidities measured in 1981 were from bottum samples collected in January from Contrary Creek Bridge (20 N.T.U.) and the Dam (17 0 N.T.U.). However, annual means (Table 3-18) Indicated that turbidities were greater in the upper Reservoir and lower in Contrary Creek. Nutrients The lowest 1981 ammonia concentrations (below detection limits) were observed in March at the North Anna Arm and Lagoon 3 stations (at all depths) and in the Rt. 208 and Dam hypolimnions. The highest readings (0.24 mg/1) occurred in September in the North Anna Arm and Dam hypolimnions, followed ~ closely by hypolimnion samples from the intakes In September and the Dam in July (both 0.23 mg/1) . Ammonia levels were generally depressed in the upper
P.eservoi r in comparison wi th the lower Reservoir and W.H.T.F. stations (Table 3-18): Intakes > Lagoon 1, Dam > Lagoon 3 > Pamunkey Arm > North Anna Arm. Throughout Lake Anna ammonia levels were higher in September, followed by June, and December and then lower in March. During~ June and September, ammonia concen-trations increased with depth, but were variable in March and December. Overall, the amount of ammonia in Lake Anna has increased significantly since 1979 (Table . 3-19). The highest concentration of nitrate nitrogen in 1981 recorded in Lake Anna water was 1.59 mg/l in September from a PamurAey Arm hypolimqlon sample (Table 3-18) . The lowest concentration was beloo the detection limit at Lagoon I in March. Nitrate nitrogen annual means were slightly elevated in the Reser-voi r compared wi th the W.H.T.F. : North Anna Arm > Dam > Pamunkey Arm > Intakes > Lagoon 1 > Lagoon 3 Nitrate nitrogen levels were higher in Lake Anna during 1981 than in previous years (although some higher levels were recorded in 1976 in the North Anna and Pamunkey Arms in the upper Reservoir). The highest total phosphate concentrations measured in 1981 water samples occurred in March at both North Anna and Pamunkey Arm stations in surface and bottom samples, respectively. The lowest level (below the detection limit) occurred at the Lagoon I surface in September. The upper Reservoir had higher annual phosphate means than other areas (Table 3-18): North Anna Arm > Pamunkey Arm > Lagoon 3 > Dam > Lagoon 1 > Intakes. The 1981 annual means have not been exceeded since 1977 (Table 3-19). The lowest and highest sulfate levels were recorded at the Dam - 5.9 mg/l in a June surface sample and 18.8 mg/l in a September bottom sample. Based on annual means (Table 3-18), sulfate concentrations decreased with distance from the power station: Intakes > Lagoon 1 > Lagoon 3 > Dam > North Anna Arm > Pamunkey Arm. These 1981 means were slightly elevated over previous years (Table 3-19).
Heavy Metals Water samples were collected and analyzed for dirsolved heavy metals in March (Table 3-8), June (Table 3-11), September (Table 3-14) and December (Table 3-17). They are listed here in the order of abundance along with the frequency at which they were observed in measurable amounts: Iron (100%), copper (56%), zine (49%) and lead (3%). The maximum concentrations recorded in 1981 were: 0.62 mg/l iron at Lagoon 3 (September), 0.10 mg/l copper and 0 37 mg/l zinc at Contrary Creek Bridge (March), and 0.06 mg/l lead at North Anna Arm (March). Except for lead, these metal concentrations are within guide-lines set by the E.P.A. for the protection of all organisms in aquatic ecosystems. If 'the water were to be used for domestic water supply, 0.06 mg/l lead would be in excess of the recommended 0.05 mg/1, but since this level did not appear at any other time, the data are suspect. Dissolved metals did not appear to have increased significantly in Lake Anna water in 1931 (Table 3-20), but, as in the past, metals were detected more frequently in Contrary Creek than other areas.
SUMMARY
- 1) The discharge canal always maintained maximum water temperatures compared with all other Lake Anna sampling stations while the power station was releasing heated wastewater. Rapid temperature declines did occur in the immediate vicinity of the discharge when a reactor tripped, while more gradual declines due to time lag occurred in distant reaches of the W.H.T.F.
- 2) Daily temperature fluctuations in Lake Anna's epilimnion occurred to a greater extent in spring than in the fall . Lake Anna was stratified from April until late September but a thermocline was briefly established in early July only in the lower Reservoir and Lagoon 2.
- 3) The percentage of dissolved oxygen saturation was higher in the W.H.T.F. than the Reservoir probably due to the physical aeration of the water
_.r- - - - -
by the station C.W.P.'s.
- 4) The alkalinity of Lake Anna water is considered to be low and appears to be decreasing.
- 5) Turbidity and pH values were steady throughout the study area, except for Contrary Creek where they were characteristically low.
- 6) Nutrients appear to be increasing, especially ammonia, nitrate (as N) and phosphates. Lake Anna nutrient levels were high in 1976-1977, but dropped off until 1981. Their descending order of abundance in Lake Anna in 1981 was 50 4 > NO3-N > NH3 > T-PO4
- 7) Heavy metals do not appear to be increasing in Lake Anna's water column, although Contrary Creek remains the area where they are most concen-trated. The descending order of abundance in which they are found was Fe > Cu >
Zn > Pb.
e i LITERATURE CITED American Public Health Association, American Water Works Association and Water Pollution Control Federation. 1975 Standard methods for the examination of water and wastewater. 14th edition. APHA, New York, . USA. National Technical Advisory Committee to the Secretary of the Interior. 1968. Water quality criteria. Pages 7-8 in Quality Criteria for Water. USEPA, 1976, Washington, D.C. USA. Reed, J. R. and Associates, Inc. 1978. Annual Report: Environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company. Richmond, Virginia. USA.
. 1979 Annual Report: Environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company. Richmond, Virginia. USA.
. 1980. Annual Report: Environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company. Richmond, Virginia. USA.
. 1981. Annual Report: Environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company. Richmond, Virginia. USA.
United States Environmental Protection Agency. 1976. Quality criteria for water. USEPA, Washington, D. C. USA. Virginia State Water Control Board. 1980. Water quality standards. Publication No. RB-1-80. USWCB, Richmond, Virginia. USA.
TABLE 3-1. f1014fHLY HAXItMt.NEAtl. AfD MININUt1 WATER TEMPERATURE VALUES FOR EIDECD STATI0 tis IH LAKE At04A AfD THE WASIE HEAT 1REAil1EHT FACILITY CALCULATED FR0t1 DAILY HIGH. HEAN AllD LOH VALUES OF 1981 Il0URLY READIIGS
- IHDICATES ItiSTRutlElli ItAllutiCT10t4
. . . . . . . . . = = _ - _ . . . . . - - _ - - - _
_ __.... t10tliHal - -- - - - -- - --- H tl H H H H H H H H H H A A A A A A N H H A A A A A A N N H L L L L L L A A A H L L L L L L A A A 7 7 7 7 7 7 L L L A T T T B B B D H H T 1 1 1 1 1 1 2 2 2 L F H H R R R I It H Y 9 9 9 9 9 9 0 0 0 I I I I P P P S T T P S S S 18 H H 8 8 8 N 3 S S T T T C F F E T F1 8 T tt B T tt B T T tt B T t1 B 1 2 3 HIGli 4.4 4.1 3.9 3.9 3.8 3.9 3.4 m 4.0 3.8 4.1 3.9 3.9 4.5 4.6 4.6 11.9 8.2 6.4 t1EAll 3.8 4.0 3.7 3.5 3.5 3.7 3.2
- 3.8 3.5 3.8 3.7 3.6 4.1 4.4 4.3 10.9 7.8 6.1 Lota 3.4 3.9 3.6 3.2 3.1 3.6 3.0
- 3.6 3.3 3.5 3.5 3.4 3.7 4.1 4.1 10.0 7.3 5.9
_ nDHTH 2 - - - - - -- - N N ll N H H H H H H H H A A A A A A N N N A A A A A A H H H L L L L L L A A A H L L L L L L A A A 7 7 7 7 7 7 L L L A T T T B B B D H H , T 1 1 1 1 1 1 2 2 2 L H H H R R R I H H N P Y 9 S 9 S 9 S 9 la H 9 9 14 0 8 0 8 0 8 I la I S I S I S' P T P T P T
. S C
T F T F 7 E T 18 B E il B T H B T T H B T H B 1 2 3 HIGH 5.3 5.3 5.0 5.2 5.2 5.2 *
- 4.6 5.0 5.3 5.0 4.6 6.0 5.5 5.5 13.2 10.1 8.5 NEAll 4.9 5.0 4.7 4.8 4.9 4.9 *
- 4.3 4.6 4.9 4.8 4.4 5.5 5.3 5.2 12.7 9.6 8.1 LOW 4.5 4.8 4.4 4.4 4.5 4.7 m a 4.2 4.3 4.6 4.6 4.2 5.2 5.0 4.9 12.1 9.1 7.8
._ __ - - - . . . . . . . . . - . -- - - . = _
_ _ ..... H00 4TH z 3 ----------- -- -- - ---- -- - H H H H H ll H H H H H H A A A A A A N N H A A A A A A N 88 H L L L L L L A A A N L L L L L L A A A 7 7 7 7 7 7 L L L A T T T B B B D H H T 1 1 1 1 1 1 2 2 2 L H H H R R R I H H Y 9 9 9 9 9 9 0 0 0 I I I I P P P S T T P S S S H H ll 8 8 8 14 5 5 S T T T C F F _ - tl E T B T H B T H B T T 11 B T H B 1 2 3 it!GH 8.5 7.9 7.7 8.3 8.1 7.7 m 7.3 7.0 8.1 8.4 8.0 7.4 9.0 8.5 8.3 15.6 12.3 11.0 ftEA!4 7.9 7.6 7.3 7.8 7.7 7.4
- 7.1 6.8. 7.7 8.0 7.8 7.2 8.5 8.2 8.0 14.7 11.7 10.5 1 011 7.5 7.3 7.0 7.5 7.4 7.2
- 6.8 6.7 7.4 7.7 7.6 7.0 8.2 8.0 7.7 13.9 11.3 10.2 e
TARE 3-ItCot4T.I. t:0741HLY MAXIt1Utt.t1E Atl Al'3 t1Ill1 HUN HATE 3 TEt1PE%ATURE VJ. LUES FOR Et0EC3 STATIONS IN LAKE Al:4A AO THE H&3TE HEAT TREATitillT FACILITi CALCULATED FRott DAILY HIGH. t1EAll. AfD LOli VALUES OF 1981 HOURLY READ 1 HGS. m ItDICATES IIISTRUttENT t1ALFUtIC T1004.
#10tlTit 4 ~= - =-
H H tl H N N tl H H P4 il N A A A A A A H 14 H A A A A A A t4 H H L L L L L L A A A N L L L L L L A A A 7 7 7 7 7 7 L L L A T T T B B D D H H T 1 1 1 1 1 1 2 2 2 L H H H R R R I It H T 9 9 9 9 9 9 0 0 0 I I I I P P P S T T P S S S te H H 8 8 8 H S S S T T T C F F E T 11 B T t1 B T #1 B T T H B T 11 D 1 2 3 HIGil 16.2 13.7 12.1 16.9 15.5 13.3 15.5 13.8 11.1 15.0 15.2 14.0 11.4 15.7 13.9 10.8 20.5 19.1 17.6 11EAll 15.4 13.2 11.8 16.0 14.7 12.7 14.8 13.4 10.8 14.4 14.6 13.5 11.1 15.2 13.5 10.4 19.8 18.5 17.0 LOl4 14.7 12.8 11.5 15.2 14.0 12.2 14.1 13.0 10.5 13.9 14.0 13.1 10.8 14.7 13.1 10.1 19.1 18.0 16.5
. ......._ _..___..- =-- ____ _ .-- - N0t41Ht5 --- - - - - -- = - ==
14 N N H f4 14 94 14 N 14 H ti A A A A A A H H tt 4 A A A A A N N 84 L L L L L L A A A H L L L L L L A A A , 7 7 7 7 L L L A T T T B B B D 54 N 7 7 54 T 1 1 1 1 1 1 2 2 2 L H H H R R R P S I H T H T 7 Y 9 9 9 9 9 9 0 0 0 I I I I P P P S S S te it H 8 8 8 H 5 S S T T T C F F E T 88 B T F1 D T tt B T T tt B T 11 B 1 2 3 HIGil 21.4 18.9 17.3 21.6 19.8 17.9 20.1 19.0 15.7 20.5 20.7 19.0 15.9 21.4 18.4 14.5 27.0 24.9 23.4 t1EAll 20.5 13.5 17.0 20.7 19.2 17.3 19.3 18.6 15.4 19.8 20.0 18.6 15.7 20.6 18.0 13.9 26.4 24.2 22.8 LOW 19.7 18.2 16.8 20.0 18.7 16.8 18.6 18.3 15.1 19.2 19.5 18.2 15.4 .20.1 17.5 13.5 25.8 23.6 22.3 .
= = = = 110ti!H:6 -- - ---- - --- -- -:- -- ----
II H I4 H H N. N N 84 N li 18 A A A A A A 14 N N A A A A A A N H 18 L L L L L L A A A H L L L L L L A A A 7 7 7 7 7 7 L L L A T T T B B B D H I4 T 1 1 1 1 1 1 2 2 2 L H H H R R R I il H Y 9 9 9 9 9 9 0 0 0 I I I I P P P S T T P S S S H tl II 8 8 8 il S S S T T T C F F E T !! B T 11 B T t1 B T T t1 B T tl B 1 2 3 IIIGH 20.4 26.4 23.8 28.4 27.3 25.5 a 25.9 21.4 27.5 27.8 25.1 20.1 27.9 23.9 15.9 33.6 31.5 30.6 ftEAtt 27.6 25.9 23.5 27.6 26.8 25.1 e 25.5 21.0 26.8 27.1 24.7 19.8 27.2 23.2 15.5 33.0 30.9 30.1 LO'4 26.8 25.4 23.2 26.8 26.3 24.6 e 25.2 20.7 26.3 26.6 24.4 19.5 26.7 22.5 15.2 32.2 30.4 29.6 . em. W
TABLE 3-IlCCNT. I. t10tiTHLY t1AXIt1L21.t1EAN. Alm HINIt1UN WATER TEHPERATURE VALUES FOR EPOECO STATIONS IN LAFE AtalA AfD THE WASTE llEAT 1 PEAT 11184T FACILITT CALCULATED TROH DAILY HIGH, t1EAN. AfD LOW VALUES OF 1981 HOURLf READillGS.
- ItCICATES It4SIPUt1Et4T HALfutETICH.
.____ __ __ = _ -=___ _ _ . gjogg{H=y - _ __ ___ _
Il it H H H H H H H H H H A A A A A A N H H A A A A A A 18 H H L L L L L L A A A H L L L L L L A A A 7 7 7 7 7 7 L L L A T T T B B B D W W T 1 1 1 1 1 1 2 2 2 L H H H R R R I H H Y 9 9 9 9 9 9 0 0 0 I I I I P P P S T T P S S S tl H H 8 8 8 H S S S T T T C F F E T tt B T H B T tt B T T tt B T 11 B 1 2 3 HIGil 29.4 28.0 26.4 29.4 28.5 27.0'
- 27.6 25.5 29.1 29.3 27.3 24.6 29.5 27.7 17.1 e 31.2 30.9 1:EAN 28.5 27.7 26.1 28.6 28.0 26.7 e 27.4 25.2 28.4 28.6 27.0 24.2 28.8 27.4 16.6 e 30.6 30.3 Lott 27.7 27.4 25.9 28.0 27.7 26.4
- 27.2 25.0 27.8 28.0 26.7 23.8 28.3 27.1 16.3 e 30.1 29.9
=-----------=== -
- 210t4TH:8 - =- -- --
H H H H H H H H H H H , H A A A A A A N N N A A A A A A N N 13 L L L L L L A A A H L L L L L L A A A 7 7 7 7 7 7 L L L A T T T B B B D W W E T 1 1 1 1 1 1 2 2 2 L H H H R R R I H H @ Y 9 9 9 9 9 9 0 0 0 I I I I P P P S T T P S S S H H 14 8 8 8 H S S S T T T C F F E T H B T tt B T tt B T T tt B T tt B 1 2 3 IIIGH 28.1 27.1 26.0 27.9 27.6 26.5 28.7 27.2 25.8 28.1 28.4 27.4 25.8 28.6 27.3 20.1 e 31.2 30.1
- t1E A H 27.4 26.9 25.8 27.2 27.1 26.1 28.0 27.0 25.6 27.5 27.8 27.2 25.5 27.8 27.1 19.4 a 30.5 29.5 LO!4 26.7 26.6 25.6 26.6 26.8 25.8 27.5 26.8 25.5 27.0 27.3 27.0 25.1 27.3 26.9 18.8 a 30.0 29.0 810NTHz9 - -- --- - -
N 14 N H H H H H H H H H A A A A A A H H H A A A A A A H H H L L L L L L A A A N L L L L L L A A A 7 7 7 7 7 7 L L L A T T T B B B D W W T 1 1 1 1 1 1 2 2 2 L H H H R R R I H H _ Y 9 9 9 9 9 9 0 0 0 I I I I P P P S T T P S S S N H 18 8 8 8 H S S S T T T C F F E T !! B T F1 B T tt B T T tt B T tl B 1 2 3 ilICH 24.9 24.2 23.7 25.2 24.6 24.1 25.7 24.8 23.9 25.9 26.2 25.3 24.3 26.7 25.3 23.7 32.6 e 28.8 ftEAN 24.2 23.9 23.3 24.6 24.2 23.8 25.2 24.5 23.7 25.5 25.6 25.0 24.0 26.2 25.0 23.2 32.1 e 28.3 LO!4 23.7 23.6 23.0 24.0 23.9 23.6 24.8 24.3 23.5 25.1 25.1 24.6 23.7 25.8 24.9 22.7 31.6 e 23.0
. ~ - . .
O TA2LE 3-11 CONT.I. t*0li1HLT MAX 1t1 Lit.ttEAtl. AfD tt1HIPOJN HATE 2 TEttPE"ATURE VALUES FOR EtCECS STAT 10ttS IN LAKE A!RIA Atc THE WASTE I! EAT 1FEATitEHT FACIL11T CALCULATED IROtt DAILT HIGH. t1EAll. Arc LOW VALUES OF 1981 HOURLY RE ADitlGS.
- IIDICA1LS IHSIRtXttl4T t1Alf uMCTI0tl.
= - -
--- tioll1Ha10 - - - - - - -- --- - -----
H H H H H H H H H H H H A A A A A A Il N N A A A A A A H t4 14 L L L L L L A A A 14 L L L L L L A A A 7 7 7 7 7 7 L L L A T T T B B B D H H T 1 1 1 1 1 1 2 2 2 L H H H R R R I H, H T 9 9 9 9 9 9 0 0 0 I I I I P P P S T T P S S S H tl H 8 8 8 H S S S T T T C F F E T 11 B T t1 B T t1 B T T t1 B T H B 1 2 3 HIGli 17.6 17.0 16.4 17.7 17.3 16.8 18.9 18.6 17.9 18.9 19.4 19.6 18.6
- 19.6 19.6 24.0 22.3 21.8 HEAll 17.2 16.7 16.2 17.3 16.9 16.6 18.5 18.3 17.6 18.6 19.1 19.4 18.4 e 19.4 19.3 23.7 21.8 21.4 LOW 16.8 16.4 15.9 16.9 16.6 16.4 18.2 18.1 17.4 18.3 18.8 19.2 18.2 e 19.2 19.0 23.2 21.4 21.0 t1014TH 211 ll H H H H H H H H H la H A A A A A A N N N A A A A A A I4 H tl L L L L L L A A A H L L L L L L A A A ,
7 7 7 7 7 7 L L L A T T T B B D D H H w T 1 1 1 1 1 1 2 2 2 L H H H R R R 1 H H T T 9 9 9 9 9 9 0 0 0 I I I I P P P S T T P S S S 14 H 14 8 8 8 la S S S T T T C F F E T (1 D T 11 B T F1 B T T H D T N 8 1 2 3 It!GH 12.0 11.5 11.3 12.0 11.6 11.5 13.5 13.2 12.5 14.0 14.5 14.4 13.4
- 14.7 14.6 22.3 19.2 17.9 i:EAtt 11.6 11.2 11.0 11.6 11.4 11.3 13.1 13.0 12.3 13.7 14.2 14.2 13.2 a 14.6 14.3 22.0 18.7 17.5 LO:4 11.3 11.0 10.7 11.2 11.1 11.1 12.7 12.7 12.1 13.4 13.8 14.0 13.0
- 14.4 14.1 21.5 18.3 17.2
......_=_- ._ __ __ Norgin:12 = - - - - = - - - - - - -------
H H I4 H H H H H H H H H A A A A A A N H H A A A A A A 14 ll H L L L L L L A % A H L L L L L L A A A 7 7 7 7 7 7 L L L A T T T B B B D H H T 1 1 1 1 1 1 2 2 2 L H H H R R R I II H T 9 9 9 9 9 9 0 0 0 I I I I P P P S T T P S S S II H I4 8 8 8 H S S S T T T C F F E T II B T t1 B T tl B T T H B T tt B 1 2 3 IIICH 6.5 6.1 6.2 6.6 6.7 6.7 8.4 8.3 7.7 10.0 10.2 10.3 9.5
- 11.0 10.7 19.0 15.7 14.2 NEAtl 6.3 5.9 6.0 6.4 6.5 6.6 8.1 8.1 7.5 9.8 10.0 10.1 9.2
- 10.9 10.5 18.5 15.4 13.8 LO;4 6.1 5.3 5.9 6.2 6.3 6.4 7.8 7.9 7.3 9.6 9.7 9.9 8.9 's 10.7 10.2 18.0 15.0 13.4 W
4 I O 1 - 1 TABLE 3-2 ~ t North Anna Synoptic Temperature Survey 1 i February 18, 1981 ) Survey Began - 0800 1 i Survey Completed - 1600 Temperaturf - Degrees Celsius Instruments - Whitney Models TC-5C and TC-5 Field Thermometers
, Synoptic Stations A-Q Depth in Meters I
I 1 I
. . _ _ _ , , - . t , . - w - - - ~ . - . -- . . . - . . - . _ - , . . - . - - - . - -
3.,,.
./ r, ; , )
a k ' /
' /
l' i
-j2-
,/ - ,
, . . . ' _ . . - ' TABLE 3-2.
NORTH ANNA SYNOPTIC ' TEMPERATURE SURVEY, ' FEBRUARY 18, 1981-
' ?
'; ,r e
STATION.."A" TIME (EST) 0818 DEPTH 0910- 10_14 .1104 1220 M 1412 1516 1605 Sfc - 6.8 70 72 7.8 7.8 7.'k 77 7. 8 ' 7.9 IM' 6. 8 ' 6.9 70- 73 7. 7 ' 75 7.6 7.7 7. 8
.' 2 ' 6.'7 , 6.9 6.9 7.1 ~ 7. 3 7.4- 7. 6- 7.5 7. 7 3 6.7 69 6.9 , 7.0. 7.0 7. 3 7.5 7. 4 7.6 4 , 6.7 6.8 6.8 69 69 6.9 7.5 7.4 75 5 6.7 6.8 6. f 6.9 69 6.8 7. 4 - 7.3 7. 4
,6 6.6 6.7
- 6.6 6'. 7 '6. 8 6.8 6.8 7.1 7 3-
, 7 ,
6.4 _ 6.6 - 6.5: 65 6.7 6.6 6.6 6.7 6.7 8 5.9 .5.9 5.8 6.1 6.2 6.5 6.3 5.8 65 i 9 54 5.7 5.6 s 5.8 6.2 6.0 57 5.6 6.1 10 53 5.4 Si4 5.5 6.0 58 5.5 5.5 5.6 11 53 5.4 5.3 5.4 5.7 5.6 5.2 5.4 5.4 12 5.0 52 5.1 5.4 5.5 55 5.1 5.0 5.1 13 50 5.0 5. '. 5.1 5. 4 5.2 5.1 5.0 5.1 14 5.0 50 5.0- 5.1 5.1 51 5.1 50 5.1 15 5.0 5.0 50 5.1 5.0 5.1 51 5.0 5.1 16 5.0 50 4.9 51 5.0 50 51 5.0 5.1 17 50 50 4' 9
. 51 50 5.0 5.1 5.0 51 18 50 5.0 4.9 5.I 5.0 5.0 5.1 5.0 5.I 19 50 5.0 4.9 5.1 5.0 5.0 5.0 50 5.1
-3 3 - l 1 l TABLE 3-2.
NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18, 1981 STATION "B" T!ME (EST) DEPTH 0814 Oj[lj [ 1017 1100 1218 1311 1410 ljljl 1611 Sfc 70 70 72 7.6 79 7.6 7.4 7.4 7.5 IM 7.0 70 70 7.2 7.8 75 7.4 7. 4 75 , 2 7.0 69 7.0 7.2 7. 5 73 7.4 7.4 75 3 7.0 6.9 70 72 7.2 73 7.4 7. 4 7.5 4 7.0 69 7.0 71 72 7.3 7.4 7.4 7.5 5 70 69 7.0 7.1 72 73 7.4 7.4 7. 5 6 7.0 6.9 6.9 70 7.1 72 7.3 7.4 7.5 7 70 6.8 6.8 6.8 71 7.0 7.2 7.4 7.5 8 70 6.5 6.3 6.8 7.1 6.9 69 7.4 75 i.
-3 4 - j TABLE 3-2.
NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18. 1981 STATION "C" TIME (EST) DEPTH 0805 0920 100),, 1120 1208 1320 1,400,, 1504 1619 Sfc 6.8 6.8 6.8 6.8 8.0 7. 0 ' 7.1 6.8 6.6 IM 6.7 6.8 68 6.7 6.9 7.0 7.1 6.8 6.4 2 6.6 6.7 6.8 6.7 6.8 6.9 7.1 6.8 6.0 3 6.2 6.6 6.7 6.7 6.7 6.8 7.0 6.5 59 4 5.8 6.1 6.6 6.3 6.6 6.6 6.9 6.3 5.8 5 57 5.8 6.0 5.8 6.1 6.3 6.4 6.2 57 - 6 5.4 5.5 56 55 5.8 5.7 6.0 6.2 5.7 7 , 5.4 5.5 5.6 55 5.7 5.7 6.0 5.9 5.6 8 5. 4 5.4 5.5 55 5.7 55 5.8 5.8 5.5 9 5.4 5.4 5.5 55 5.6 55 5.7 57 5.5 10 5.3 5.4 5.5 5.5 5.6 5.5 5.7 5.6 5.4 11 5.2 5.4 55 5. 4 5.6 55 5.7 5.6 5.4 1: 5.1 5.2 55 5. 4 55 5.4 5.6 5.6 54 13 5.1 52 5.2 53 5.5 5.4 5.6 5.6 5.4 14 51 5.1 5.2 5.2 5.4 5.3 5.6 5.5 5.3 15 5.1 50 5.2 5.1 5.4 5.3 5.5 55 5.3 16 50 5.0 5.2 5.1 5.3 5.2 5.4 5.4 5.3 17 5.0 5.0 5.2 5.1 53 5.1 5.4 5.4 5.3 18 50 50 5.2 5.1 5.3 5.1 5.4 5.3 5.1 19 50 50 5.2 5.1 5.3 5.1 5.4 5.3 5.1
a TABLE 3-2. NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18, 19BI STATION "D" TIME (EST)
-DEPTH 0826 0201 1010 till 1225 1301 1415 1519 1600 Sfc 72 72 7.1 7.3 7.6 7.8 77 7. 7 7.8 IM 72 7. 2 7.1 72 75 7.8 7.6 7.7 7.7 2 7.2 7. 2 7.0 72 7.2 7.6 75 7. 3 7. 7 3 71 71 7.0 7.1 7.2 75 7. 5 7.3 75 4 7.1 7.1 7.0 7.1 72 7.4 7.4 7. 2 7.4 5 7.0 7.1 6.9 7.1 7.1 7.3 7.3 7.1 7.4 6 6.9 7.0 6.9 7.0 7.0 7.3 73 7.0 7.3 7 6.8 70 6.9 6.9 6.8 72 7.1 6.9 7.3 8 6.7 70 6.8 6.8 6.7 7.1 7.0 6.6 7.1 9 6.6 6.9 6.8 6.8 6.7 7.1 70 6.4 7.0 10 6.5 67 6.8 6.5 6.6 6.8 6.6 5.8 6.8 11 6.3 6.6 6.4 6.4 6.5 6.6 6.6 5.7 6.6 12 6.2 6.4 6.2 59 6.1 6.5 6.1 5.6 6.6 13 6.1 6.3 6.1 5.8 6.I 6.5 5.8 5.5 6.5 14 6.0 6.2 5.9 5.8 5.8 6.4 5.8 5.5 6.3 l
l 15 6.0 5.9 5.9 5.8 5.8 5.8 5.8 5.5 59 16 6.0 59 5.9 5.8 5.8 5.8 57 5.5 5.8 t l
" --2 '
TABLE 3-2.- NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18, 1981 STATION "E" TIME (EST) DEPTH 0810 0917 1007 1115 1213 1315 1404 1509 1614 Sfc 70 70 71 77 8.0 77 7.5 7.2 73 IM 70 69 7.0 7.1 8.0 75 75 7.2 7. 2 2 6.9 6.8 6.8 7.0 76 7.5 7. 4 7.2 7.2 3 6.8 6.7 6.8 6.9 6.9 7.2 7.4 7.2 7.1 4 6.7 67 6.8 6.9 69 6.9 73 7.2 70 5 6.7 6.7 6.6 6.8 6.9 6.8 7.2 6.9 70 6 6.6 6.6 6.5 6.6 6.8 6.7 7.1 6.4 7.0 7 57 6.2 5.8 6.3 6.6 6.5 6.2 5.7 6.7 8 5.6 5.6 5.5 5.6 5.9 5.7 5.7 5.6 57 9 5.5 5.4 55 55 5.6 5.6 5.5 5.5 5.4 10 55 5.4 55 55 5.4 5.6 55 5.4 5.4 11 5.4 5.4 5.4 55 5.4 5.4 5.5 5.4 5.4 12 5.2 5.4 5.3 5.4 5.4 54 5.4 53 53 13 50 52 52 5.3 5.4 5.2 5.3 5.0 5.2 14 4.9 4.9 50 5.1 5.3 5.1 5.1 50 50 15 4.9 4.9 50 51 5.1 5.0 5.1 5.0 50 16 49 49 50 5.1 5.0 5.0 51 5.0 50 17 4.9 4.9 50 5.1 5.0 5.0 51 5.0 50 18 4.9 49 50 51 5.0 5.0 5.1 5.0 5.0
TABLE 3-2 . NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18. 1981 STATION "F" TIME (EST) DEPTH 0815 0916 1010 1105 1220 1300 1410 ljdj[ ljygt Sfc 6.6 6.8 71 7.5 79 7.2 7.3 6.6 6.8 IM 65 6.6 6.8 69 7.1 7.2 7.2 6.6 6.8 2 6.5 6.5 6.7 6.8 7.0 7.0 7.0 6.6 6.8 3 6.3 6.3 6.5 6.6 6.9 69 6.9 6.5 6.8 4 6.0 6.2 6.4 6.4 6.8 6.7 6.5 6.5 6.7 5 5.8 6.1 6.2 6.2 6.5 6.6 6.1 6.2 6.4 . 6 5.5 5.6 5.7 58 6.2 59 6.0 5.6 6.0 7 5.5 5.5 5.6 58 6.0 59 5.9 56 5.9 8 55 55 5.6 57 6.0 58 5.9 5.5 59 9 54 55 5.6 5.7 6.0 5.8 59 5.4' 5.8 10 53 5.4 5.5 57 59 57 5.8 5.3 5.8 11 53 5.3 5.4 5.5 5.8 5.6 5.7 5.3 57 12 5.3 5.3 5.4 5.5 5.8 5.6 5.7 5.2 5.6 13 53 5.3 5.4 55 5.8 55 5.6 51 5.6 14 53 53 5.4 5.5 57 5.4 5.6 51 5.6 15 53 53 5.4 55 57 5.4 5.6 5.1 55 16 5.3 53 5.4 5.5 57 5.4 5.6 51 55
/
i l 3-2. TABLE NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY - 18l. 1981 STATION "G" TIME (EST) DEPTH 0809 0912 1013 1108 1223 1304 1413 1511 jljyyi Sfc 6.1 6.2 6.3 63 6.9 7.5 6.7 6.5 6.7 IM 6.1 6.1 6.2 6.3 6.4 6.7 6.7 6.5 6.7 2 6.1 6.1 6.2 6.2 6.3 6.3 6.6 6.5 6.6 3 6.0 6.1 6.2 6.2 6.3 6.3 6.5 6.5 6.6 4 6.0 6.1 6.2 6.2 6.3 6.3 6.5 6.4 6.6 5 6.0 6.0 6.1 6.2 6.3 6.3 6.4 6.4 6.6 6 5.7 5.8 5.9 6.0 6.0 5.9 6.3 6.4 6.5
~
7 55 55 5.7 58 5.8 5.8 6.2 5. 8 6.2 ' 8 55 5.4 5.6 5.6 5.7 5.7 59 5.8 5.9 9 5.4 5.4 5.6 5.6 5.7 57 5.8 5.7 5.9 10 53 5.3 55 5.6 5.6 5.6 5.8 5.6 5. 7 11 5.2 5.2 5.4 55 55 55 5.6 5.5 5.7 12 51 52 53 5.3 53 5.4 5.6 5.5 55 13 49 49 5.1 51 53 5.1 5.6 5.2 5.2 14 4.8 4.8 4.9 51 5.1 5.1 5.4 4.9 52 15 4.6 4.7 4.8 4.9 5.1 5.1 5.1 4.9 51 16 4.6 4.6 4.8 4. 8 49 4.9 50 4. 8 51 17 4.6 4.6 4.8 4.8 49 4.9 5.0 4.8 51
TABLE 3-2. . NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18, 1981 STATION "H" TIME (EST) DEPTH 0804 0909 1018_ 1113 1230 1307 1416 1506 1600 Sfc 58 5.9 6.2 6.6 77 65 , 6.3 6.2 6.2 IM 57 5.7 59 6.0 6.1 6.2 6.1 6.2 6.1 2 5.6 5.7 5.8 59 6.0 6.0 6.1 6.1 6.1 3 56 5.6 5.8 5.8 5.9 59 6.0 6.0 6.1 4 55 5.6 57 5.7 5.8 5.7 5.9 59 6.0 5 55 5.5 57 5.7 5.7 5.7 5.7 5.8 5.9 6 5.5 5.5 5.6 5.6 57 5.7 5.7 57 5.8 7 55 5.5 56 5.6 5.6 5.6 57 5.7 57 8 5.4 54 55 5.6 5.6 5.6 5.6 5.6 5. 7 9 54 53 55 5.4 5.5 5.5 55 5.5 5.6 to 53 5.3 5.4 5.4 54 5.4 5.4 5.5 5.5 11 53 5.2 5.4 53 54 5.4 5.4 5.4 55 12 52 5.2 53 5.3 5.4 5i 5.4 5.4 55 l 13 52 51 53 5.2 5.4 5.3 53 5.4 55 l iu 5.i 5.i 5.i 5.2 52 5.i 52 5.3 54 15 4. 7 4.7 4.8 4.8 4.9 4,9 4.8 4.8 5.3 16 4.7 4.7 4.8 4.8 4.9 4.9 4.8 48 4.9
TABLE 3-2 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18, 198I
~
STATION "l" TIME (EST) DEPTH 0756 0902 1025 1120 1240 1311 1426 1459 1612 Sfc 5.3 5.6 5.5 6.2 6.3 6.3 5.9 59 5.6 IM 52 5.4 5.4 5.4 6.1 6.0 5.8 59 5.6 2 5.2 5.3 5.3 52 5.5 53 5.8 59 5.6 3 52 5.2 52 5.2 5.2 5.2 5.7 59 5.6 4 52 52 5.1 5.1 52 5.2 57 5.9 56 5 51 5.2 5.1 5.1 5.2 5.1 5.7 59 5.6 6 51 5.2 5.1 5.1 51 51 5.7 59 5.6 7 5.1 5.2 5.1 5.1 51 5.1 5.6 58 53 8 51 52 51 5.0 5.1 5.1 5.2 5.4 55 9 5.1 52 5.0 50 5.1 5.1 51 5.4 5.4 10 49 5.2 50 5.0 5.1 5.1 5.1 5.4 5.4 11 4.8 4.9 4.9 5.0 51 5.0 51 5.4 5.3 12 4.8 49 4.9 4.8 5.1 4.8 5.1 5.4 5.2 13 4.8 4.9 4.7 4.7 5.1 4.8 5.1 5.3 52 14 4.8 4.8 4.7 4.7 4.8 4.8 49 5.2 5.2
i TABLE 3-2. NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18, 1981 STATION "J" TIME (EST) DEPTH 0800 0906 1022 1117 12Jjl 1302, 1423 1 _502 1606 Sfc 4.8 4.8 5.1 5.7 5.8 57 5.5 5.4 5.4 - IM 4. 7 47 5.1 4.9 5.7 5.5 5.4 5.3 5.3 2 4.7 4.7 4.7 4.8 4.9 51 5.3 53 5.2 3 4.6 4.6 47 4.7 4.8 4.8 5.2 5.2 5.2 4 4.6 4.6 4.6 4.6 4.8 47 5.1 5.1 5.1 5 4.6 4.6 4.6 4.6 4.7 4.7 4.6 4.8 51 6 4.5 4.6 4.6 4.6 4.7 4.7 4.6 4.8 4.8 7 45 4.6 4.6 4.6 4.6 4.6 4.6 4.7 4.8 8 4.5 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 9 4.5 4.6 4.6 4.6 4.6 4.6 45 4.6 4.6 10 4.4 4.5 4.6 4.6 4.6 4.6 4.5 4.6 4.6 11 4.4 4.5 4.5 4.6 4.6 4.6 4.5 4.6 4.6 12 4.4 45 4.5 4.6 4.6 4.6 4.5 4.6 4.5 l 13 43 4.4 4.5 4.6 4.6 4.6 4.5 4.6 4.5 l 4.6 4.6 4.6 4.5 iu 4.3 4.4 4.5 4.5 4.5 i5 4.3 4.4 4.5 4.5 4.6 4.5 4.5 4.6 4.5 16 4.3 4.4 4.5 4.5 4.6 4.5 4.5 4.6 4.5 i l t i I
TABLE 3-2 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18, 1981 STATION "K" TIME (EST) DEPTH 0800 Oj2j[ 1000 1116 1212 1318 1401 1518 1621 Sfc 51 55 53 53 5.5 5.4 52 5.2 53 IM 4.9 51 52 50 5.2 53 52 52 52 2 4.9 49 5.0 49 51 5.2 5.2 51 5.2 3 4.9 4.9 4.8 4.8 4.9 5.1 52 5.1 52 4 4.8 4.8 4.8 47 4.8 4.8 5.1 5.1 52 5 4.8 47 4.8 4.7 4.8 4.7 51 51 5.2 6 47 4.7 47 4.7 4.8 4.7 51 50 5.2 i 7 4.7 4.7 4.7 4.7 4.8 4.7 49 50 5.2 8 4.6 4.7 4.7 4.6 4.8 4.7 4.8 5.0 5.2 9 4.6 4.7 47 4.6 4.7 4.6 4.7 5.0 52 10 4.6 4.6 4.6 4.6 4.7 4.6 47 4.9 5.2 11 4.6 4.6 4.6 4.6 4.7 4.6 4.7 4.8 52 12 4.6 4.6 4.6 4.6 4.7 4.6 4.7 4.7 51 13 4.6 4.6 4.6 4.6 4.7 4.6 4.7 4.7 5.0 14 4.6 4.6 4.6 4.6 4.7 4.6 4.7 4.7 4.9 1 m
i 143-TABLE 3-2. NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18, 1981 STATION "L" TIME (EST) DEPTH 0806 0918 1006 1113 1217 1314 1405 1515 1616 Sfc 4.4 4.5 4.6 4.6 4.9 4.8 4.8 4.8 4.8 IM 4.4 4.5 4.5 4.5 4.8 4.7 4.7 4.8 4.7 2 4.4 4.5 4.5 4.5 4.6 4.7 4.7 4.8 4.7 3 4.4 4.5 4.5 4.5 4.6 4.6 4.7 4.8 4.7 4 4.4 4.5 4.5 4.5 4.6 4.6 4.7 4.8 4.7 5 4.4 4.5 4.5 4.5 4.6 4.6 4.7 4. 8 4. 7 6 4. 4 4.5 4.5 4.5 4.6 4.6 4.7 4.8 4.7 7 4.4 45 45 4.5 4.6 4.6 4.7 4.8 4.7 8 4.4 4.5 4.4 4.5 4.5 4.5 4.7 4.8 4. 7 9 4.4 4.4 4.4 4.5 4.5 4.5 4.6 4.7 4.7 10 4.4 4.4 4.4 4.5 4.4 4.4 4.6 4.7 4.7 11 4.4 4.4 4.4 4.5 4.4 4.4 4.6 4. 7 4.7 12 4.4 4.4 4.4 4.5 4.4 4.4 4.6 4.7 47
'EABLE 3-2.
NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18, 1981 STATION "M" TIME (EST) DEPTH 0814 0910 1014 1107 1225 1307 1411 1508 1609 Sfc 4.4 4.5 5.0 5.0 50 5.1 53 5.1 5.3 IM 4.4 4.5 4.7 4.9 5.0 4.9 53 5.1 5.3 2 4.4 4.4 4.5 4.7 4.8 4.9 5.1 5.0 5.2 3 4.4 4.4 4.4 4.5 4.5 4.8 4.8 5.0 51 4 4.3 4.4 4.3 4.5 4.4 4.5 4.8 5.0 5.1 5 4.3 4.3 4.3 4.4 4.3 4.5 4.8 5.0 5.1 6 4.3 4.3 4.3 4.4 4.2 4.4 4. 8 5.0 50 7 4.3 43 4.2 4.3 4.1 4.3 4.7 49 5.0 8 4.3 4.2 4.2 4.2 4.1 4.2 4.6 4.6 4.8 9 4.2 4.2 4.2 4.2 4.1 4.2 4.4 4.3 4.7 10 4.1 4.2 4.2 4.2 4.1 4.2 4.3 4.3 4.6 11 4.1 4.2 4.2 4.2 4.1 4.2 4.2 4.3 4.4 12 4.1 4.2 4.2 4.2 4.1 4.2 4.2 4. 2 4.3
TABLE 3-2 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18, 1981 STATION "N" TIME (EST) DEPTH 0822 '0900 1022 1101 1231 1301 1417 1501 1602 Sfc 4.2 43 4.5 4.6 4.5 4.6 4.5 4.6 4.6 IM 4.1 4.2 4.3 4.4 4.5 '4.5 4.5 4.6 4.6 T 2 4.1 4.2 4.2 4.3 4.4 4.5 4.5 4.6 4.6 3 4.1 4.2 4.2 4.3 4.3 4.5 4.5 4.5 4.6 4 4.1 4.2 4.2 4.3 4.2 4.4 4.5 4.5 4.6 5 4.1 4.2 4.2 4.3 4.2 4.4 4.5 4.5 4. 6 . 6 4.1 4.2 4.2 43 4.2 4.4 45 4.5 4.6 7 4.1 4.2 4.2 4.3 4.2 43 4.5 4.5 4.5 8 4.1 4.2 4.2 4.3 4.2 4.3 4.5 4.5 4.5 9 4.1 4.2 4.2 4.3 4.2 4.3 4.5 4.5 4.5 10 4.1 4.2 4.2 4.3 4.2 4.3 4.5 4.5 4.5 i 11 4.1 4.2 4.2 4.3 4.2 4.3 4.5 45 4.5 i
\
)
i TABLE 3- 2. NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18. 1981 STATION "0" . TIME (EST) DEPTH 0810 0918 1007 1118 1215 1324 140s 1518 1615 Sfc 4.8 4.9 54 5.3 5.8 6.1 6.4 6.2 6.2 IM 4. 7 4.7 4.9 4.8 5.5 5.6 6.0 6.0 59 2 4.7 4.7 4.9 4.8 5.2 52 59 5.8 5.9 - 3 4. 7 4.6 4.8 4.8 5.0 51 5.9 57 5.7 4 4.7 4.6 4.8 4.8 4.9 4.9 4.0 4.8 51 5 4.7 4.6 4.8 4.8 4.9 4. 8 4.9 4.8 4.8
-6 4.7 4.7 49 4.8 51 47 49 4.8 4.7 7 5.0 4.8 51 5.0 51 4.8 5.0 4.8 4.7 8 5.1 49 5.1 5.1 52 5.0 5.1 4.8 4.7
e47-TABLE 3-2. NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18, 1981 STATION "P" TlHE (EST) l DEPTH 0825 0910 1016 1105 1224 1312 1421- 1508 1626 Sfc 5.4 5.4 59 5.6 59 5.6 6.0 59 .5 9 IM 5.1 52 5.4 5.3 54 5.4 5.6 5.6 56 2 51 5.1 5.2 52 53 5.3 5.6 5.5 55 3 4.9 4.9 52 50 51 4.8 5.4 4.9 55 4 49 4.8 5.1 49 4.9 4.7 5.2 4.8 53 5 4.8 4.7 4.9 4.8 4.8 4.7 4.8 4.7 4.9 6 4.7 4.6 4.7 4.8 4.8 4.6 4.8 4. 7 4.7 7 4.6 4.6 4.6 4.7 4.8 4.6 4.8 4.7 4.7 8 4.6 4.6 4.6 4.6 4.8 4.6 4.8 4.7 4.7 9 4.5 4.6 4.6 4.6 4.8 4.6 4.7 4.7 4.7 to 4.5 4.5 4.6 4.6 4.8 4.6 4.7 4.7 4.7 i l l l i l l l l l . .
l .
~48-TABLE 3-2 .
NORTH ANNA SYNOPTIC TEMPERATURE SURVEY FEBRUARY 18, 19_81__ STATION "Q" . TIME (EST) DEPTH 0_8)), OE 1021 1100 1230 1306 1427 1500 1600 Sfc 51 55 5.8 5.8 5.7 6.2 59 6.1 6.4 IM 4.9 52 5.1 5.3 5.6 5.9 5.7 6.0 6.2 2 4.9 51 4.8 5.3 55 5.8 5.7 59 6.1 3 4.9 5.1 4.7 50 51 5.5 5.6 59 6.0 4 4.8 5.0 4.7 5.0 4.9 55 5.6 59 59 5 4.7 49 4.7 4.9 4.8 50 5.4 59 59 6 4.7 4.8 4.7 4.9 4.8 4.9 53 5. 7 5.9 7 4.7 4.8 4.7 49 4.8 4.9 5.2 5.7 5.7 8 4.6 4.8 4.7 4.9 4.7 4.8 5.1 5.1 5.7 9 4.6 4.8 4.7 4.9 4.7 4.8 5.1 4.9 52 10 4.6 4.7 4.7 4.9 4.7 4.8 51 4.9 5.2 i O
_ _ _ . _ . . _ . _ _ . _ . _ _ _ . . . _ _ _ .. . _ _ . m. , . __.. .. . . . . . _ _ _ . 1 t 49-l A 4 1 i I 1
~
j~ , TABLE 3-3. North Anna Synoptic Temperature Survey May 13, 1981 Survey Began - 0800 . i Survey Completed - 1700 i Temperature - Degrees Celsius ! Instruments - Whitney Models TC-SC and TC-5 Field
- Thermometers Synoptic Stations A-Q Depth in Meters l
I l F m- - . -,,...- - ,_.----. . . . - . _ so.. . ._. - _ , , _ _ , , . _ . . , . . . , , - . ,
,...m,. -,,,,_,_e.c ,. ,, . ..y.--,y., .- -y _,.-,-y,, -... ,--r- .-, -.c.
TABLE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13, 1981 STATION "A" TIME (EDT) DEPTH 0808 0901 1012 1108 1228 1303 1420 1459 2
,16,2,1, 1700 S fc 19.5 19.4 19 7 20.1 20.4 20.4 20.7 20.9 21.0 21.2 IM 19 5 19.4 19 7 10.1 20.4 20.4 20.7 20.8 21.0 21.1 2 19 5 19 4 19.6 20.0 20.3 20.4 20.5 20.7 20 9 21.0 3 19 5 19.4 19.6 19.9 20.2 20 3 20.5 20 7 20.6 20.6 4 19 5 19 4 19 6 19.9 19 9 20.2 20.4 20.7 20.3 20.3 5 19.4 19.4 19.6 19 8 19 8 20.2 20.1 20.4 20.1 20.2 6 19.4 19.4 19.6 19.7 19.8 19 9 19.8 19 9 20.0 20.1 7 19 4 19.3 19.6 19 7 19.7 19.8 19.6 19.7 19 2 19.6 8 19.4 19 2 19.5 19 5 19.6 19 7 18.5 18.2 18.7 18 9 9 19 2 18.4 19 5 18.2 18.2 17 9 17.4 17 5 17.5 17.4 to 17 9 17 3 17.1 17.0 16.8 17.2 17.2 17.3 17 2 17.2 11 16 9 16.7 16.6 16.6 16.5 16.6 16.6 16.9 16.9 16.7 12 16.4 16.2 16.4 16.5 16.3 16.5 16.4 16.6 16.5 16.5 13 16.2 16.0 16.2 16.2 15 9 16.2 15.9 16.2 16.4 16.1 14 16.0 15 9 16.0 15 9 15 8 15 9 15.7 16.0 16.0 15.5 15 15 7 15 4 15.7 15.6 15.6 15.7 15 5 15.7 15.6 15.4 16 15.4 14.8 15.6 15.4 15.5 15.4 15.3 15.5 15.4 15 3 17 15.0 14.8 15.1 15.2 15.2 15.1 14.8 15.3 14.7 14.8 18 14 5 14.1 14.9 14 9 14.6 14.5 14.7 14.8 14.2 14.5 19 13 9 13.6 13.8 14.1 14.0 14.1 14.3 14.1 13.8 14.5
TABLE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13. 1981 STATION "B" TIME (EDT) DEPTH 0805 0904 1009 1105 1229 1300 1418 1504 1618 1704 S fc 19.6 19 5 19 9 20.1 20.2 20.3 20.3 20.4 20.6 20.8 IM 19 6 19 5 19 9 20.1 20.1 20.2 20.3 20.4 20 5 20.5 2 19.6 19 5 19 8 19 9 20.1 20.2 20.3 20.4 20 5 20.4 1 3 19 6 19 5 19 7 19.9 20.0 20.2 20.2 20.4 20.5 20.4 4 19.6 19 5 19 7 19 9 19 9 20.1 20.1 20 3 20.4 20.4 5 19 5 19.4 19 6 19 8 19 9 19 9 20.0 20.3 20 3 20 3
- 6 19 5 19.4 19 6 19.8 L9. 4 19 6 19 8 19 9 20.0 20 3 7 19 5 19.4 19 5 19.6 19.4 19.5 19 5 19.7 19.9 20.2 8 19 5 19 4 19.5 19.4 19.4 19 5 19 5 19 5 19.8 20.2
TABLE 3-30 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY _ MAY 13, 1981 STATION "C" TIME (EDT) DEPTH 0756 0917 1001 1159 1236 1312 1410 1511 1611 1712 Sfc 19.1 19 3 19 5 19.8 19 8 19.8 20.4 20.4 20.5 20.7 IM 19 1 19 2 19. 4 19 7 19.8 19 7 20.3 20.1 20.2 20.5 2 19 1 19 2 19.4 19.7 19 7 19.6 20.2 19 8 20.1 20 3 3 19 1 19 2 19 3 19.7 19.6 19 5 19 9 19 6 19 9 20.1 ~4 19 1 19 2 19 3 19 6 19 5 19.4 19.8 19 5 19 7 19.8 5 19 1 19.2 19 3 19.6 19.4 19 3 19 6 19 2 19.6 19.4 6 19 0 19 2 19 3 19 5 19 3 19.2 19 5 19 1 19 5 19 2 7 18.9 19.1 19 3 19 5 19.2 19 2 19.3 18.9 19 2 19 2 8 18.6 18 9 19 2 19.4 18.8 18.7 19 1 18.4 19 0 18.9 9 18.2 18.3 18.7 18.8 18.3 18.1 18.9 18 3 18.6 18.5 10 17 5 17.4 18.2 18.1 17.6 17.8 18.3 18.0 18.1 18.2 11 16.8 17 1 17 5 17.6 17.2 17.3 17 9 17 2 17.2 17 5 12 16.7 16.3 16.8 17 2 16.7 16.5 16.6 16.3 16.6 16.6 13 16.1 16.1 16.4 16.5 16.5 16.1 16.3 16.2 16.2 16.1 14 15 8 15.8 16.0 16.1 15.6 15 9 16.1 15 9 16.0 16.0 15 15.4 15.5 15 7 15 9 15.3 15.7 15.8 15.8 15.7 15.7 16 15.3 15.4 15.3 15.8 14.6 15.4 15.4 15 6 15.5 15.3 17 14.6 14.2 14.6 15.6 14.1 14.5 14.7 15.1 14.8 14.9 18 14.1 13.6 14.0 14 9 13.7 14.0 14 3 14.4 14.2 14.4 19 13.5 13.6 13.8 14.2 13 7 13.7 14.3 14.0 14.0 14.0
TABZJE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13, 1981 STATION "D" TIME (EDT) DEPTH 0814 0911 1017 1114 1232 1308 1425 1454 1626 1611 Sfc- 19 3 19.4 19.6 19.8 19.9 20.2 20.4 20.8 20.7 20.7 IM 19 3 19.4 19.5 19.8 19 9 20.1 20.3 20.8 20.7 20.6 2 19 3 19.4 19 5 19 7 19.8 19 9 20.2 20 7 20.7 20.6 3 19 3 19 4 19 5 19.7 19.8 19.8 19.5 20.3 20.3 20.4 4 19 2 19 3 19.4 19.6 19.6 19.7 19 5 20.2 19.9 20 3 5 19 1 19 2 19.3 19 3 19 5 19.5 19.1 19 7 19.6 19.8 6 19 0 18.8 19 1 19 1 19 3 19 0 19.0 19 5 19.3 19 5 7 18.6 18.6 18.8 18.8 19.0 18.8 18.3 19.3 19 0 19.3 8 18 3 18.2 18.5 18.7 18.3 18.3 17 2 18.3 17.3 19 2 9 18.0 17.7 17.8 18.2 17 5 17.4 16.8 17.4 17.2 18.4 10 16.7 17.1 16.7 17.0 16.8 17.2 16.5 17.1 16.8 16.9 II 16.2 16.1 16.0 16 9 16.3 16.5 15.9 16.8 16.2 16.6 12 15.6 15 7 15.8 16.5 15 9 16.4 15.8 16.4 16.1 16.2 13 15 5 15 7 15.6 16.0 15 7 15.7 15 7 16 3 15.8 16.0 14 15 3 15 5 15.5 15 7 15.6 15.6 15.7 16.2 15.7 l 15.? 15 15 3 15 5 15.5 15.6 15.6 15.6 15.6 16.2 15.7 15.9 16 15.3 15 5 15.5 15.6 15.6 15.6 15.6 16.2 15.7 15 9 l l
TABLE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13. 1981 STATION "E" TIME (EDT) DEPTH 0802 0906 1006 1058 1221 1257 1415 1507 1615 1708 Sfc 19.4 19.6 19 7 19.8 19 9 20.2 20.2 20.4 20 5 20.4 IM 19 4 19 5 19.7 19.8 19 8 20.2 20.1 20.3 20.4 20.4 2 19.4 19.4 19.6 19 7 19 7 19.9 19.8 20.2 20.3 20.3 3 19.4 19.4 19 5 19 7 19.6 19.8 19 7 20.0 20.2 20.3 4 19.4 19 4 19 4 19.7 19.6 19.8 19.7 20,0 20.1 20.3 5 19 3 19 3 19.4 19 6 19.6 19.8 19 7 19 9 19 9 20.2 6 19.3 19.2 19.4 19 5 19 5 19.7 19 5 19.8 19.6 19.8 7 19 2 19 2 19.4 19.4 19.4 19 5 19 2 19 5 19 5 19 4 8 19 1 19.0 19.2 19.3 19.2 19 4 18.6 19 2 19.4 19 1 9 18.6 18.7 18.8 19.1 19 1 18.8 17 7 18 9 18.8 18.8 to 18.3 17 5 17 5 18.0 18.1 17.6 17.4 17 5 17.4 17.6 11 17 0 17 2 16.8 17.6 16.9 17.0 16.7 17.0 17 2 16.7 12 16.3 16.7 16.5 17.6 16.1 16.4 16.5 16 5 16.5 16.5 13 16.0 16 3 16.1 16.3 16.1 16.2 15.9 15.9 16.2 16.0 14 15 7 16.0 15 9 16.1 16.0 15 9 15.8 15 9 15 9 15.7 15 15 5 15 5 15.6 15.8 15.8 15.8 15 7 15.7 15 7 15.6 16 15.3 14 9 15 2 15.8 15.6 15'.5 15.3 15.2 15.4 15.4 17 14.7 14.5 14.8 15.8 15.4 15 2 14.8 15 1 14.9 14.6 18 14.0 14.4 14.6 15.4 14.8 14.7 14.4 14.6 14 5 14.6
TABLE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13, 1981 STATION "F" TIME (EDT) DEPTH 0838 0900 1016 1147 1212 1315 1407 1515 1607 1717 Sfc 19 5 19.6 19 9 19 9 19 7 20.1 20.7 20.6 20 9 20.5 IM 19 5 19.6 19.8 19.9 19.7 19 9 20.7 20.3 20.8 20.3 2 19.5 19.6 19.7 19.8 19 7 19.8 20.4 19 7 20.2 19 9 3 19 5 19 5 19.6 19 7 19.6 19 7 20 3 19.5 19 9 19.8 4 19 5 19.4 19 6 19.6 19 3 19.6 20.1 19 4 19 7 19 7 5 19 5 19.4 19.6 19 5 19 2 19.4 19 9 19 3 19.6 19 6 6 19.5 19 3 19.6 19.4 19.1 19.4 19.8 19.2 19.4 19 5 7 19 5 19 3 19.5 19 3 19.1 19 3 19.7 19.1 19.3 19.2 8 19.4 19 2 19.4 19 2 19 0 19.2 19.5 18.7 19 2 19 0 9 19 1 18 9 18.9 19.1 18.7 19.1 19 1 18.2 18.9 18.8 10 18.6 18 5 18.7 18.6 17.4 19.1 18.6 17 9 18.4 18.2 11 18.0 17.1 17.0 17.4 16.8 18.5 17.6 17 2 18.0 16.6 12 16.8 16.6 16.6 16.7 16.6 16.5 16.8 16.3 16.5 16.2 13 16.8 16 3 16.3 16.2 16.0 16.1 16.7 16.1 16.3 15.9 14 15 9 15.7 15.8 15.9 15.9 15 9 16.6 16.0 16.2 15.8 15 15.8 15.6 15.7 15.8 15.6 15 9 16.5 15.8 16.0 15 7 16 15.6 15.6 15 7 15.8 15.6 15.8 16.4 15.6 16.0 15.7 e
TABLE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SUP.VEY MAY 13, 1981 STATION "G" TIME (EDT) . DEPTH 0830 0905 1011 1140 1230 1254 1430 1455 1628 1654 Sfc 19.4 19 3 19 5 19.6 20.2 20.0 20.2 20.5 20.4 20.6 IM 19 4 19.3 19.5 19.5 20.1 20.0 19.9 20.1 20.1 20.5 2 19.4 19 3 19:5 19.4 19.8 19.6 19 7 19 9 19 8 20.1 3 19 3 19.2 19.4 19.4 19.7 19.4 19.6 19.8 19.6 19.7 4 19 3 19 2 19.4 19 3 19.7 19.4 19.4 19 5 19.6 19 7 5 19 3 19 2 19 3 19.2 19.7 19.3 19.2 19 3 19 5 19 5 6 19 2 19 0 19 3 19.1 19.6 19.3 19 1 19 2 19 2 19 3 7 19 2 19.0 19.1 19 0 19.6 19.2 19.0 19.1 19 1 19.1 8 19.1 18.9 19 0 18.7 19 5 19 1 18.8 18 9 18.8 19.0 9 18.4 18.5 18.3 17.7 19.1 18.8 18.5 18.7 18.7 18.9 10 17.9 18.1 18.1 17 5 18.7 18.4 17.8 18.3 18.4 18.8 11 17.4 17.2 17.4 16.9 18.1 17 7 17.3 17 7 17.7 18.6 12 17.2 16.9 17.1 16.8 17 7 17.2 16.9 16.9 16.9 17 9 13 16.6 16.5 17.0 16.1 17.1 16.9 16.8 16.6 16.4 16.9 14 16.1 16.0 16.2 15 7 16.6 16.5 16.0 16.2 16.1 16.4 15 15 8 15.7 15 8 15.7 16.3 15.8 15.8 15.8 15 8 16.4 16 15.8 15.6 15.7 15.7 16.0 15.8 15.8 15.8 15 8 15.8 17 15.8 15.6 15.7 15 7 16.0 15.8 15.8 15.8 15 8 15 7
TABLE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13, 1981 STATION "H" TIME (EDT) DEPTH 0826 0908 1008 1136 1224 1258 1423 1500 1621 1700 Sfc 19.4 19 3 19.5 19 5 20.2 20.0 20.1 20.2 20.4 20.4 IM 19.4 19 3 19.5 19 3 20.1 20.0 20.0 19 9 20.3 20.3 2 19.4 19 2 19.4 19 2 20.1 19.8 19 7 19.6 19.8 19.9 3 19.4 19.2 19.4 19 1 19.9 19 6 19.6 19 5 19 7 19.8 4 19 3 19 2 19.4 19.0 19.8 19 5 19 3 19.4 19.6 19 6 5 19 3 19 2 19 3 19.0 19 7 19.4 19 3 19.4 19.4 19 5 6 19 3 19 2 19 3 19 0 19.6 19.4 19 3 19 3 19.2 19 2 7 19 3 19 1 19 2 18 9 19.4 19 3 19.3 19.2 19 1 19 1 8 18 9 18.7 18.9 18.8 19 3 19 2 19 2 18.8 18.9 19 1 9 18.4 18 3 18.6 18.0 19.2 18.9 18.9 18.4 18.7 18.9 to 18.1 18.0 18.1 17.0 18.9 18.6 18.5 18.0 18.2 18.4 11 17.4 17.3 17.5 16.4 18.0 17 5 18.1 17.3 17.7 17.3 12 17.0 16.8 16.9 16.2 17.0 16.7 17.1 16.6 16.6 16.6 13 16.5 16.4 16.5 16.0 16.8 16.5 16.4 16 3 16.2 16.1 14 16.2 16.1 16.2 15 9 16.7 16.5 16.2 16.0 16.0 15 9 15 16.1 16.0 16.1 15.6 16.2 16.2 15.8 15.8 15.7 15.6 l 16 16.0 15.8 15.8 15.6 15.6 15.8 15 3 15 5 15.4 15.4
TABLE 3-3 a NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13, 1981 STATION "1" TIME (EDT) . DEPTH 0817 0916 1000 1129 1211 1312 1411 1510 1609 1716 Sfc 19 4 19 3 19 5 19 7 19.8 20.1 19.8 20.0 20.2 20.2 IM 19.4 19.3 19.4 19.6 19 7 20.1 19.8 19.9 20.1 20.2 2 19 3 19 3 19 3 19 6 19 7 20.1 19.8 19 9 19.9 20.2-3" 19 3 19 3 19 3 19 5 19.6 20.1 19.8 19.7 19.4 19 9 4 19 3 19.2 19.2 19 4 19 4 20.0 19 7 19.5 19 2 19 1 5 19 3 19 2 19 2 19.3 19 2 19.8 19.7 19 1 19 0 19 0 6 19 2 19.2 19 1 19.2 19.1 19.7 19 3 18.8 18 9 18.9 7 18.5 18 9 18.7 18.9 19 0 19.6 19 2 18.6 18.5 18.6 8 18.0 18.0 17 9 18.6 18.2 18.5 18.6 18.0 18.1 18.3 9 17.6 17 9 17.8 17 9 17 3 18.0 17.4 17 5 17.9 18.0 10 17.0 17.1 17.4 17 3 17 0 17.6 17.0 17 2 17.3 17.4 11 16.4 16.8 16.8 16.7 16.7 17.3 16.6 17.0 17.1 17 1 12 16.2 16.6 16.4 16.6 16.5 16.7 16.2 16 7 16.2 16.6 13 16.2 16.4 16.2 16.4 16.2 16.6 16.1 16.2 16.1 16.2 14 16.1 16.1 16.1 15 9 16.1 16.5 16.0 16.1 16.1 16.1 4 15 16.1 15.7 15 9 15 9 15.9 16.3 15 9 15.8 16.1 16.0
LiBLE 3-3 o f!0RTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13. 1981 3TATION "J" TIME (EDT) DEPTH 0822 0,jjj, 1005 ,LE, .Illj, 1304 1415 0 15,0j, 1614 1711 Sfc 19 4 19.4 19 6 19.8 20.0 20 3 20.2 20.1 20.4 20.5 IM 19 4 19 3 19.5 19 7 19 9 20.1 20.1 19 7 20.1 20 3 2 19 4 19 3 19 5 19 5 19.6 19 7 19 6 19.5 19 7 19 7 3 19 4 19 3 19 5 19.4 19 5 19 7 19 5 19.4 19 6 19.6 4 19.4 19 2 19.4 19 3 19.4 19 6 19 4 19 2 19 4 19 3 5 19 3 19 2 19.3 19 2 19.4 19 5 19 3 19 1 19 1 19.1 6 19 2 19 1 19 3 19 0 19 2 19 4 19.8 18.8 18.6 18.5 7 18 5 18.5 18.9 18.2 18.8 19 0 18.5 18.5 18.4 18.2 8 18.0 17.8 17.8 17 9 18 5 18,7 18 0 18 1 18 0 17 9 9 17.6 17 5 17 7 17.7 18.1 18.0 17.7 17.7 17 5 17 2 10 17.1 16 9 17.0 17.4 16.9 17.7 17.4 17.4 16.9 16.5 11 16.8 16.7 16.4 16.6 16.9 17 3 16 9 17.1 16.4 16.3 12 16.4 16.2 16.2 16.1 16.3 16.8 16.4 16.6 16.2 16.1 13 16.3 16.2 16.1 16.1 16.2 16.6 16.1 16.2 16.1 16.0 14 15.9 15 9 15 9 15.8 16.0 16.4 16.0 15 9 16.0 15.8 15 15.6 15.4 15 7 15 5 15.8 16.1 16.0 15.8 15.8 15.6 16 15 4 15 1 15.5 15.5 15.6 16.1 15.6 15.6 15.8 15.4
TABLE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13, 1981 STATION "K" TIME (EDT) ' DEPTH 0800 0917 1002 1122 1214 1315 1400 13,12, 1604 1716 Sfc 18.4 19 0 19 4 19.4 19.4 19.4 19 7 19.8 19 9 19.8 IM 18.4 19 0 19.4 19 4 19 3 19.4 19.6 19.8 19 9 19.8 2 18.4 19 0 19 3 19 3 19 2 19 3 19.4 19.5 19 7 19 7 'l 3 18.3 19 0 *19 3 19 2 19 1 19 2 19 3 19.4 19.6 19 7 4 18.3 19.0 19 3 19 1 19 0 -19 0 19 3, 19.3 19 5 19.5 i5 18.3 19 0 19 2 19 1 19 0 18 9 19 2 19 2 19 5 19 5 6 18.3 19.0 19 2 19 0 18.9 18.9 19.1 19.0 19 5 19.4 7 18.2 19 0 19 2 19 0 18.5 18.7 18 9 18.3 19 2 17 5 ,8 17 8 19 0 19 2 18.7 17 7 18.1 17.6 17.2 17.4 17 3 9 16.8 18.9 19 2 17.4 17 2 17.0 17 1 17 0 17 2 17.1 10 16.4 18.4 19 1 17 2 16.9 16 7 16.6 16.6 16.8 16.8 11 16.2 17.4 17.8 16.7 16.6 16.3 16.2 16 3 16.3 16 3 12 15 7 16.9 17 3 16.4 16.0 15.8 15 9 16.1 16.0 16.0 13 15 2 16.7 16 9 15.9 15 6 15 5 15 5 15.8 15.8 15 5 14 15 1 16.6 16.8 15 7 15 5 15 5 15.3 15.6 15 6 15.1
61-TABLE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13. 1981 STATION "L" TIME (EDT) DEPTH 0804 0812 1007 1114_ 1219 1310 1410 1514 16Jf[ 1711 sfc 18.5 19 0 19.4 19.4 19 2 19.3 19 3 19 5 19 5 19 5 IM 18 5 19.0 19.4 19 3 19 1 19 2 19 1 19 3 19.4 19.4 2 18.5 19 0 19 2 19 2 19 0 19.1 19.0 19 1 19.2 19.1 3 18 5 19 0 19 2 19 1 18.9 18.8 18.8 18.8 18.9 18.9 4 18 5 19 0 19 2 19.1 18.8 18.8 18.8 18 7 18.8 18.7 5 18.4 18.9 19.1 18.9 18.6 18.6 18.6 18.6 18.6 18.5 6'. 18.2 18.7 19 0 18.8 18.4 18.2 18.5 18.5 18.4 18.4 7 17 7 18.2 18.5 18.4 18.0 17 8 18.0 18.1 17.8 18.1 8 16.8 17 8 18.1 17 5 17 3 17 2 17 1 17 2 17.4 17 4 9 16.6 17 2 17 5 17.2 17.0 17.0 16.9 17.0 17.1 17 1 10 16.3 17 0 17.2 17.0 16.7 16.4 16.5 16.4 16.6 16.6 11 15 9 16.5 16.8 16.6 16.2 16.1 16.2 16.1 16.2 16.0 12 15.7 16 3 16.4 16.4 16.0 15 7 15.8 15 7 15.9 15.8 I
- - - - = . _ - ,
TABLE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13, 1981 STATION "M" TIME (EDT) DEPTH 0813 0805 0 J011 1106 1225 M 1417 1506 61
,l_616, 1704 Sfc 18.2 18.8 19 1 19 1 19 2 19 2 19.4 19 7 19 9 20.0 IM 18.2 18.8 19 0 19 0 19 1 19 2 19.3 19.4 19 9 19 9 2 18.2 18.7 19 0 19 0 19 0 19 1 19.2 19 2 19 3 19.4 3 18.2 18.? 18.9 18 9 18 9 19 0 19 0 18.6 18.4 18.4 4 18.1 16.7 18.9 18.8 18.8 18.8 18.4 18.3 18.3 18.3 5 18.1 18.6 18.8 18.6 18.6 18.3 18.2 18.2 18.2 18.1 6 17.7 18.3 18.7 18.4 17 9 18.1 17.7 18.0 18.0 17 9 7 17.4 17 9 18.1 17.9 17.6 17 5 17.5 17.6 17.7 17.7 8 17 0 17.4 17 7 17.6 17.3 17.4 17.2 17 2 17 3 17 3 9 16 5 17.2 17.4 17 2 16 9 17 2 16.8 16 9 16.8 17.1 -10 16.0 16.3 16.6 16.5 16.2 16.6 16.1 16.1 16.1 16.5 11 15 5 16.1 16.3 16.2 15 9 16.1 15.8 15.8 15 9 16.0 12 15 5 16.0 16.3 16.1 15.8 15 9 15,6 15 6 15.8 15.6
L4BLE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13. 1981 l STATION "N"
~
TIME (EDT) DEPTH 0820 0900 102J, 1101- 1231 1300 1424 1500 1623 1700 src 18.0 18.5 18.7 18 9 18.8 19 0 19 2 19 3 19 3 19.8 IM 18.0 18.5 18.7 18.7 18.7 18.8 19.0 19.1 19 1 19 6 2 17 9 18.5 18.7 18.6 18.5 18.6 18.3 18.3 18.5 18.7 3 17 9 18 5 18.6 18.5 18.3 18.3 18.1 18.1 18.2 18.6 4 17 9 18.5 18.5 18.4 18.1 18.1 18.0 18.1 18.1 18.3 5 17 9 18.4 18.4 18.3 18.0 18.0 17 9 18.0 18.0 18.2 6 17.6 18.2 18.2 18.0 17.8 17 9 17 7 18.0 17 9 18.2 7 17 4 17.9 17 9 17.7 17.4 17 5 17.4 17 9 17.8 18.1 8 17 3 17 9 17 3 17 3 16 9 17.0 17.2 17.6 16.6 17 9 9 15.8 16.8 16.7 16.7 16.6 16 5 16.5 16.5 16.5 16.6 to 15.8 16.4 16.4 16.3 16.0 16 5 16.1 16.1 16.1 16.4 11 15.8 16.4 16.3 16.1 16.0 16.1 15.7 15 9 15.7 16.1 12 15.8 16.4 16.2 16.1 16.0 16.0 15.7 15 9 15 5 16.0 l r O 9-
TABLE 3-3 NCRTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13. 1981
- STATION "0" TIME (EDT)
DEPTH 0810 0918 1008 M 1115 1207 1405 1505 1608 1715 Sfc 18.8 18.2 18.8 18.4 19 1 19 3 19.7 20.4 20.3 20 5 4 IM 18.8 18.1 18.6 18.3 18,8 19 1 19.4 20.4 18.7 19 7 2 18.7 18.0 18.6 18.1 13.5 18 9 19 2 19 5 18.5 18.1 3 18.5 17 7 18.4 17 9 18.3 18.6 18.7 19 0 18.2 18.5 4 18.1 17.4 18.1 17 3 17 9 18.3 18.3 18.6 17.9 17.8 5 17.8 16 9 17.4 16.9 17 9 17.8 17 5 18.3 17.1 17.3 7 6 17.4 16.7 17 3 16.8 17.4 17 2 17.4 17.3 17.0 17.1 7 17.4 16.7 17.3 16.8 17.4 17.2 17.4 17 3 16 9 17.1 8 17.4 16.7 17 3 16.8 17 3 17.2 17.4 17 3 16.9 17.1 9 17 5 16.7 17 3 16.8 17.3 17.2 17.6 17.2 17.1 17.2 1 e
L1BLE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13. 1981 STATION "P" , TIME (EDT) DEPTH 0830 0907 1015 1105 1225 IJJU[ 1415 1500 1620 1700 Sfc 18.4 18.4 18.2 18 5 18.8 19 1 19 1 19 9 20.2 20.4 IM 18.3 18.2 17 9 18.2 18.8 18.6 18 9 19 3 18.8 19 3 2 18.0 18.1 17 9 17.8 18.1 18.2 18.0 18.7 18.4 18.5 3 17 9 17 9 17.8 17.7 18.0 18.1 17.7 18.2 17.8 17 9 4 17.8 17.8 17.6 17 5 17.8 17 9 17.6 17.9 17.7 17 9 5 17 7 17 7 17 5 17.3 17.7 17.8 17.4 17.8 17.6 17.7 6 17.6 17.5 17 3 17.2 17.6 17.6 17 3 17.6 17 5 17.6 7 17.6 17 3 17.2 17.1 17 5 17.4 17.0 17 5 17 3 17 5 8 17.5 17.2 17.2 17.0 17.3 17 3 16.9 17.2 17.1 17.4 9 17.4 17.1 17.2 17.0 17.3 17.1 16.8' 17 0 16.9 17.1 10 17.4 17.1 17.2 17 0 17 2 17.1 16.8 17.0 16.9 17.1
TABLE 3-3 NORTH ANNA SYNOPTIC TEMPERATURE SURVEY MAY 13, 1981 STATION "Q" TIME (EDT) . DEPTH Og g 1023 1100 1230 1300 1427 ,14,jl 1630 ,1,6,[1 Sfc 18.4 18.5 18.4 18.6 19.1 18.9 19 5 19.2 20.2 20.3 IM 18 3 18.5 18.2 18.5 18.6 18.8 19 5 18.9 19 7 19.8 2 18.2 18.4 18.1 18.2 18.6 18.8 19.4 18.6 19.1 19 2 3 17 9 18.2 17.8 18.1 17.8 18.5 18.9 18 ~. 7 18.0 18.1 4 18.0 18.0 17.4 17.9 17.8 18.2 ' 17 9 17.8 17 5 17.8 5 16.9 17.4 16 9 17.4 17.2 17.9 17 5 17.6 17.0 17 2 6 16 5 17 0 16.6 16.6 16.6 17.0 17 5 17.1 16.8 17.2 7 16.5 16.7 16.4 16.4 16.5 16.6 16.8 16.5 16.3 16.8 8 16.5 16.6 16.3 16.3 16.2 16.2 16.4 16.3 16.2 16.4 9 16.4 16 5 16.3 16.3 16.2 16.1 16.4 16.3 16.0 16.2 10 16.4 16.5 16.3 16.3 16.2 16.1 16.4 16.5 16.0 16.2 4
1 I l 4 TABLE 3-4. North Anna Synoptic Temperature Survey September 17. 1981 Survey Began - 0800 Survey Completed - 1700 Temperature - Degrees Celsius instruments - Whitney Model Tc-Sc and Tc-5 Field Thermometers Synoptic Stations A-Q Depth in Meters l l l I \ i l
~- . TABLE 3- 4. NORTH ANNA SYNOPTIC TEMPERATURE SURVEY~ SEPTEMBER 17, 1981 STATION "A" TIME (EST) DEPTH 0310 0926 1008 1103 1229 1302 1421 1502__ 1625 1704 Sfc 27.1 27.0 27.0 27.0 27.4 27.4 27.5 27.4 27.4 27.4 IM 27.1 27.0 27.0 27.0 27.3 27.3 27.4 27.3 27.4 27.4 2 27.1 27.0 27.0 27.0 27.1 27.2 27.2 27.3 27.4 27.4 3 27.1 27.0 27.0 27 0 27.0 27.0 27.2 27.2 27.3 27.3 l 4 27 0 27.0 27.0 26.9 27.0 27.0 27.2 27.0 27.2 27.2 5 27.0 27.0 26.9 26.8 26.9 26.9 27.0 26.8 26.9 26.9 6 27.0 26.9 26.8 26.8 26.9 26.8 26.8 26.7 26.8 26.7 7 26.9 26 9 26.8 26.8 26.7 26.8 26.7 26.6 26.7 26.7 8 26.9 26.8 26.6 26.7 26.6 26.7 26.6 26.5 26.5 26.6 9 26.6 26.7 26.4 26.5 26.5 26.5 26.5 26.2 26.3 26.3 to 26.2 26.4 26.2 26.3 26.2 26.3 26.1 25 9 26.1 26.0 11 25 7 25.6 25 5 25.4 25.8 25.9 25.6 25.6 25 7 25.7 12 25.4 25.4 25.4 25.4 25 5 25.5 25.3 25.2 25.2 25.2 13 25.1 25.1 25.1 25 2 25.1 25.0 25.0 24.8 24.9 25.1 14 25.0 25.1 25.1 25.1 25.0 24.9 24.8 24.8 24.8 24.7 15 25.0 24.9 24.7 24.8 25.0 24.7 24.6 24.7 24.7 24.6 16 24.7 24.7 24.6 24.6 24.8 24.6 24.6 24.5 24.5 24.5 17 24.7 24.7 24.4 24.4 24.5 24.5 24.3 24.2 24.3 24.2 IS 24.1 24.3 24.0 24.0 24.2 24.1 23.8 23.5 23.9 23.9 19 23.0 23.4 23.2 23.4 23.5 22.7 22.8 22.5 23.1 23.2
TABLE 3-4. NORTH ANNA SYNOPTIC TEMPERATURE SbRVEY-SEPTEMBER 17. 1981 STATION "B" TIME (EST) DEPTH 0806 0923 1009 1100 1227 1305 1418 1505 1624 1708 Sfc 27.1 27.1 27.1 27.2 27 5 27.h 27.6 27.5 27.5 27.5 IM 27.1 27.1 27.1 27.2 27.4 27.3 27.4 27.5 27.5 27.5 2 27.1 27.1 27.1 27.2 27.3 27.3 27.6 27.4 27.4 27.4 3 27.1 27.1 27.1 27.1 27.2 27.3 27.4 27.3 27.4 27.3 4 27.1 27.1 27.1 27.1 27.2 27.2 27.4 27.2 27.2 27.2 5 27.1 27.1 27.1 27.1 27.2 27.2 27.4 26 9 26.8 26.8 6 27.1 27.0 27.1 27.0 27.1 27.1 27.0 26.6 26.7 26.8 7 27.1 27.0 27.0 27.0 26.7 26.8 26.7 26.6 26.5 26.7 8 27.0 26.9 26.9 26.9 26.5 26.6 26.7 26.6 26.h 26.7 l I i l l l l l i e
TABLE 3-4. NORTH ANNA SYt10PTIC TEMPERATURE SURVEY SEPTEMBER 17. 1981 STATION "C" TIME (EST) DEPTH 0757 0917 1014 10g 0 1217 1313 1412 _ 1508 _ 1616 1714 Sfc 27.1 27.1 27.2 27.2 27.3 27.4 27.7 27.5 27.3 27.3 IM 27.1 27 1 27.2 27.2 27 3 27.2 27.3 27.3 27.3 27.3 2 27.1 27.1 27.2 27.1 27.2 27.1 27.2 27.2 27.3 27.3 3 27.1 27.1 27.2 27.1 27.1 27.0 27.2 27.1 27.3 27.2 4 27.1 27.0 27.1 27.0 27.0 26.7 27.1 26.S 27.2 27.1 5 27.0 26.9 26.9 26.9 26.8 26.5 26.6 26.6 26.7 26.8 6 26.9 26.7 26.8 26.7 26.7 26.4 26.5 26.5 26.6 26.6 7 26.7 26.5 26.2 26.6 26.6 26.4 26.4 26.4 26.5 26.4 8 26.3 26.4 26.2 26.4 26.4 26.3 26.3 26.3 26.4 26.4 9 26.2 26.3 26.2 5.2 26.3 26.3 26.2 26.3 26.3 26.1 10 26.1 26.2 26.1 26.1 26.1 26.0 26.1 26.2 26.2 25.8 11 25.9 26.1 25 9 25.7 25 9 25.9 25 9 25 9 25.9 25.6-12 25.6 25 9 25.6 25.3 25.3 25.5 25.3 25.7 25.7 25.5 13 25.0 25.4 25.2 25.1 25.2 25.0 24.8 25 5 25.3 25.0 14 25.0 25.1 25.1 25.0 25.0 24.9 24.8 24 9 25.1 25.0 15 24 9 24.9 25.0 24.9 24.8 24.8 24.8 24.8 24.9 25.0 16 24.8 24.8 24.8 24.7 24.7 24.7 24.7 24.8 24.8 24.9 17 24.7 24.8 24.6 24.4 24.6 24.5 24.5 24.8 26.7 24.8 18 24.4 24.3 23.8 23.6 23.8 23.4 24.0 24.5 24.4 24.3 19 23.2 23.2 23.0 22.9 22 9 23.2 23.5 24.0 23.8 24.1
~
TA BLE 3-4 . HORTil ANNA SYNOPTIC TEMPERATURE SbRVEY , SEPTEMBER 17, 1981 l l STATION "D" TIME (EST) l DEPTH 0815 09)), 1002 1106 1221 1310 1424 1458 1630 1700 , - Sfc 27.3 27.2 27.1 27.2 27.4 27.3 27.4 25.7 27.4 27.4 IM 27.3 27.2 27.1 27.2 27.3 27.3 27.4- 27.5 27.4 27.4 2 27.3 27.2 27.1 27.2 27.3 27.2 27.4 27.5 27.4 27.4 3 27.3 27.2 27.1 27.2 27.2 27.2 27.3 27.4 27.4 27.3 4 27.2 27.1 27.1 27.2 27.2 27.2 27.2 27.3 27.3 27.3 5 27.2 26.9 27.0 27.1 27.1 27.1 27.1 27.2 27.2 27.2 6 27.2 26.7 26.9 26.8 27.1 27.0 27.0 26.7 27.0 27.1 7 27.1 26.4 26.7 26.8 27.1 26.2 27.0 26.3 26.4 26.9 8 26.9 26.3 26.3 26.4 26.9 26.1 26.8 26.2 26.3 26.3 9 26.6 25 9 26.1 26.2 26.2 26.0 26.2 26.2 26.2 26.2 to 26.5 25.8 25.8 25 9 26.1 25.8 26.1 26.0 25.9 26.0 11 25.8 25.7 25.8 25.7 25.6 25.7 25.9 25.9 25.6 25.7 12 25.7 25.4 25.7 25.4 25.5 25.6 25.6 25.8 25.4 25.7 13 25.5 25.2 25.4 25.3 25.4 25.6 25.5 25.8 25.3 25.7 14 25.4 25.2 25.3 25.3 25.4 25.5 25.5 25.7 25.2 25.7
- 15 25.3 25.2 25.3 25.3 25.3 25.3 25.4 25.5 23.2 25.7 16 is.2 25.1 25.3 25.2 25 2 25.2 25.3 25.5 25.1 25.7 l
l l 1
TABLE 3-4. NORTH ANNA SYNOPTIC TEMPERATURE SURVEY SEPTEMBER 17. 1981 STATION "E" TIME (EST) DEPTH 0802 0921 1011 1058- 1224 1307 1415 1517 1620 1712
~
sfc 27.2 27.2 27.3 27.3 27.4 27.4 27.4 27 5 27.3 27.3 IM 27.2 27.2 27.3 27.3 27.3 27.3 27.3 27.3 27.3 27.3
~
2 27.2 27.2 27.2 27.2 27.3 27.2 27.2 27.2 27.2 27.3 3 27.2 27.2 27.2 27.2 27.2 27.1 27.2 27.1 27.2 27.2 4 27.2 27.2 27.2 27.2 27.1 27.0 27.1 27.0 27.2 27.2 5 27.2 27.1 27.0 27.1 27.0 26.8 26.8 26.8 26.9 27.1 6 27.1 27.0 26.8 26.8 26.7 26.7 26.7 26.6 26.7 26.7 7 26.8 26.6 26.6 26.6 26.6 26.6 26.6 26.5 26.5 26.5 8 26.5 26.5 26.5 26.4 26.5 26.5 26.5 26.3 26.4 26.3 9 26.4 26.3 26.4 26.2 26.3 26.1 26.3 26.1 26.3 26.2 to 26.2 26.1 26.0 25.9 26.2 25 9 26.0 25.8 26.2 26.0 11 25.7 25.6 25.7 25.7 25.7 25.5 25.6 25.4 26.0 25.6 12 25.4 25.4 25.4 25.4 25.3 25.1 25.0 25.3 25.4 25.3 13 25.3 25.3 25.0 25.2 25.1 25.0 25.0 25.2 25.1 25.1 14 25 0 25 1 25.0 25.1 24.9 24.9 24.9 25.0 25.0 24.9 15 25.0 25.0 24.9 24.9 24.8 24.7 24.8 24.9 24.8 24.8 16 24.9 24.8 24.6 24.6 24.5 24.5 24.6 24.7 24.7 24.7 17 24.6 24.4 24.1 24.2 24.4 24.4 24.5 24.6 24.6 24.6 18 24.3 24.0 24.0 24.2 24.3 24.4 24.5 24.6 26.5 24.3
TABLE 3-4. il_0RTH AtlNA SYh0PTIC TEr1PERATURE SURVEY SEPTEMBER 17, 1981 STATI0ll "F"
.TIMC (EST)
DEPTH 0827 0919 1024 1055 1229 1300 1416 1440 1632 1653 Sfc 27.0 27.0 27.0 27.1 27 3 27.4 27.6 27.8 27.4 27.4 IM 27.0 27.0 27.0 27.1 27.2 27.2 27.2 27.4 27.2 27.1 2 26.9 27.0 27.0 27.0 27.0 27.0 27.0 27 2 27.1 27.0 3 26.9 26.9 26.9 27.0 26.9 27.0 26.9 26.9 26.9 26.8 4 26.9 26 9 26.9 26.9 26.8 26.8 26.7 26.8 26.8 26.7 5 26.9 26.9 26.9 26.7 26.6 26.7 26.6 26.7 26.6 26.6 6 26.6 26.8 26.7 26.6 26.5 26.6 26.5 26.6 26.5 26.5 7 26.5 26.6 26.5 26.5 26.5 26.5 26.5 26.5 26.4 26.4 8 26.5 26.5 26.4 26.5 26.4 26.4 26.3 26.4 26.3 26.3 9 26.5 26.5 26.4 26.5 26.3 26.3 26.1 26.2 26.2 26.2 10 26.5 26.2 26.4 26.4 26.1 25.9 26.0 26.0 26.1 26.0 11 26.2 25.7 25.6 25.5 25.4 25.5 25.7 25.8 25.8 25.6 12 25.7 25.4 25.2 25.3 25 3 25.3 25.4 25.5 25.3 25.2 13 25.3 25.2 25.2 25.2 25 2 25.2 25.2 25.2 24.9 2h.9 14 25.1 25.0 25.1 25.1 25.1 25.2 25.0 25.1 26.8 24.8 15 25.0 24.8 24.9 25.0 24.9 24.9 24.8 25.0 24.7 24.6 16 24.8 24.7 24.7 '24.8 24.8 24.9 24.8 25.0 24.6 24.6
~
TABLE 3-4. NORTH ANNA SYNOPTIC TEMPERATURE SURVEY SEPTEMBER 17, 1981 , STATION "G" TIME (EST) DEPTH 0834 0910 1014 1104 1223 1305 1414 1445 1628 1657 Sfc 26.6 26.5 26.6 26.6 26.7 26.8 27.1 27.2 27 3 27.2 in 26.6 26.5 26.6 26.6 26.7 26.7 26.9 26.8 27.2 27.1 2 26.6 26.5 26.6 26.6 26.6 26.6 26.8 26.7 26.8 26.8 3 26.6 26.5 26.5 26.5 26.5 26.6 26.7 26.6 26.7 26.7 4 26.6 26.5 26.5 26.5 26.5 26.5 26.6 26.5 26.6 26.6 5 26.5 26.5 26.5 26.5 26.5 26.5 26.5 26.5 26.5 26.5 6 26.5 26.4 26.5 26.5 26.5 26.5 26.5 26.5 26.5 26.5 7 26.4 26.4 26.4 26.4 26.4 26.4 26.5 26.3 26.5 26.4 8 26.3 26.2 26.3 26.3 26.2 26.2 26.2 26.2 26.3 26.2 9 26.3 26.2 26.2 26.1 26.0 26.0 26.0 26.0 26.1 26.1 to 26.2 25.7 25.7 25.8 25.4 25 5 25.7 25.6 25.8 25 7 11 25.4 25.4 25.4 25.3 25.3 25 3 25.4 25 3 25.4 25.3 12 25.3 25.2 25 2 25.3 25.2 25.2 24.9 25.1 25.2 25.0 13 25.1 25.0 24.6 24.6 24.7 24.6 24.7 24.7 24.9 24.9 14 24.7 24.8 24.5 24.5 24.5 24.5 24.6 24.7 2L.7 24.6 15 24.6 24.5 24.5 24.4 24.5 24.5 24.5 24.6 24.5 24.5 16 24.6 24.5 24.5 24.4 24.5 24.4 24.5 24.6 24.5 24.5 17 24.6 24.5 24 .5 24.4 24.5 24.4 24.5 24.6 24.5 24.5
TABLE 3-4 ; I NORTH ANNA SYNOPTIC TEMPERATURE SURVEY ! SEPTET 1BER 17. 1981 I STATION "H" TIME (EST) DEPTH 0840 0907 1011 1109 1226 1310 1408 1450 1622 1700 Sfc 26.4 26.4 26.4 26.4 26.4 26.6 26.9 27.0 26.8 26.6 IM 26.4 26.4 26.4 26.4 26.4 26.6 26.6 26.9 26.7 26.6 2 26.4 26.4 26.4 26.4 26.4 26.4 26.5 26.5 26.5 26.5 3 26.4 26.4 26.4 26.6 26.4 26.4' 26.4 26.5 26.5 26.5 4 26.4 26.4 26.4 26.4 26.4 26.h 26.4 26.4 26.5 26.4 5 26.4 26.4 26.4 26.4 26.4 26h 26.3 26 3 26.4 26.3 6 26.4 26.4 26.4 26.4 26.4 26.3 26.3 26.3 26.3 26.3-7 26.4 26.4 26.4 26.4 26.3 26.3 26.2 26.2 26.3 26.3 8 26.4 26.3 26.3 26.2 26.2 26.1 26.0 26.1 26.2 26.2 9 26.2 25 9 25 9 25 7 25.8 25.9 25.8 25.9 26.1 26.0 10 25.8 25.4 25.4 25.5 25.7 25.7 25.4 25.4 25.5 25.4 11 25.3 25.2 25.2 25.1 25.2 25.2 25.2 25.2 25.3 25.4 12 25.2 25.0 24.9 24.8 24.9 25.0 24.7 24.8 25.2 25.2 13 25.1 24.9 24.7 24.7 24.6 24.7 24.6 24.7 24.6 24.7 14 24.9 24.7 24.5 24.5 24.5 24.5 24.5 24.5 24.6 24.6 15 24.6 24.5 24.5 24.5 24.5 24.5 24.5 24.5 24.4 24.5 16 24.6 24.5 24.5 24.5 24.5 24.5 24.5 24.5 24.4 24.4
TABLE 3-4. t10RTH AfillA SYNOPTIC TEMPERATUPE SURVEY SEPTEMBEP. 17, 1981 STATION "I" TIME (EST) DEPTH 0840 0900 1002 1120 1210 1310 1400 1456 1614 1712 Sfc 26.3 26.3 26.3 26.3 26.3 26.5 26.9 26.9 26.8 26.4 IM 26.3 26.3 26.3 26.3 26.3 26.3 26.5 26 5- 26.6 26.4 2 26.3 26.3 26.3 26.3 26.3 26.3 26.4 26.3 26.4 26 3 3 26.3 26.3 26.3 26.2 26.2 26.2 26.3 26.2 26.3 26.2 4 26.3 26.3 26.3 26.2 26.2 26.2 26.2 26.2 26.2 26.2 5 26.2 26.2 26.2 26.1 26.2 26.2 26.2 26.0 26.3 26.1 6 26.2 26.1 26.1 25 9 26.0 26.1 26.1 25.8 26.2 26.0 7 25 9 26.0 25.8 25.5 25 7 25.8 25.8 25.7 26.1 25.8 8 25.7 25.6 25 5 25.3 25.6 25.5 25.8 25.6 26.0 25.7 9 25.4 25.5 25.5 25.3 25.3 25.2 25.4 25.5 25.7 25.6 to 25.0 25.4 25 3 25.2 24.8 24.7 25.1 25.2 25.5 25.4 11 24.7 24.8 24.7 24.7 24.7 24.7 24.8 24.7 24.9 25.0 12 24.6 24.7 24.5 24.5 24.6 24.6 24.7 24.6 24.7 24.6 13 25.4 24.4 24.4 24.4 24.4 24.5 24.6 24.5 24.5 24.5 14 24.4 24.4 24.4 24.4 24.4 24.5 24.6 24.5 24.5 24.4 15 24.4 24.4 24.4 24.4 24.4 24.5 24.6 24.5 24.5 24.4
TABLE 3 4. HORTH ANNA SYNOPTIC TEMPERATURE SURVEY SEPTEMBER 17, 1981 STATION "J"
~
TIME (EST) DEPTH 0843 0903 1007 1115 1214 1312 1404 1455 1617 1706 S fc 26.1 26.1 26.2 26.2 26.3 26.5 26.8 26.6 26.4 26.4 IM 26.1 26.1 26.2 26.2 26.2 26.3 26.4 26.2 26.3 26.3 2 26.1 26.1 26.2 26.2 26.2 26.2 26.3 26.2 26.2 26.2 3 26.1 26.1 26.1 26.2 26.2 26.2 26.2 26.1 26.2 26.2 4 26.1 26.1 26.1 26.1 26.2 26.1 26.2 26.1 26.1 26.2 5 26.1 26.1 26.1 26.1 26.1 26.1 26.1 26.1 26.1 26.1 6 26.1 26.1 26.1 26.1 26.1 26.1 26.1 26.0 26.0 26.0 7 26.1 26.0 26.0 26.0 26.0 26.0 26.0 25.8 26.0 26.0 8 25 9 25.7 25 7 25.5 25.8 25.9 25 5 25.4 25.6 25 9 9 25.3 25.2 25.2 25.2 25.4 25.3 25.3 25.2 25.4 25.3 to 24 9 24.8 24.9 24.9 25.0 25.0 24.9 24.8 24.9 25.2 11 24.7 24.7 24.8 24.8 24.7 24.8 24.8 24.7 24.8 25.0 12 24.6 24.6 24.6 24.5 24.6 24.7 24.6 24.5 24.6 24.8 13 24 5 24.5 24.5 24.4 24.5 24.6 24.5 24.5 24.5 24.6 14 24.4 24.4 24.4 24.4 24.4 24.5 24.5 24.4 24.4 24.5 15 24.4 24.3 24.3 24.4 24.4 24.4 24.3 24.3 24.4 24.4 16 24.2 24.2 24.2 24.2 24.2 26.3 24.3 24.3 24.2 24.2
)
i TABLE 3-4. NORTH ANNA SYNOPTlc TEMPERATURE SURVEY SEPTEMBER 17. 1981 STATION "K" TIME (EST) .l DEPTH 0755 0916 1001 _1120 1210 1324 1358 1519 1612 1706 sfc 25.6 25.6 25.6 25.6 25.7 26.0 26.5 26.5 26.4 26.3 IM 25.6 25.6 25.5 25.6 25.7 25 9 26.4 26.6 26.3 26.2 2 25.6 25.6 25.5 25.6 25.7 25.8 26.1 26.0 26.1 25.9 3 25.6 25.6 25.5 25.6 25.7 25 7 26.1 25.8 26.0 25.9 4 25.6 25.6 25 5 25.6 25.6 25.7 26.0 25.8 25.9 25.8 5 25.6 25.6 25 5 25.5 25.6 25.7 26.0 25.7 25.8 25.7 6 25.5 25.5 25.5 25.5 25.6 25.6 26.0 25.7 25.8 25.6 7 25.5 25.5 25.4 25.5 25.6 25.6 26.0 25.6 25.7 25.5 8 25.0 25.3 25.3 25.4 25.5 25.6 25.9 25.4 25.1 25.3 9 24.5 24.5 24.4 24.6 24.6 24.8 25 3 24.7 24.8 24.6 10 24.2 24.3 24.2 24.3 24.3 24.5 25 0 24.2 24.6 24.2 II 24.I 24.I 24.0 24.I 24.2 24.2 24.6 24.I 24.3 24.I 12 24.0 24.0 23.9 24.0 24.1 24.1 24.6 24.0 24.3 24.1 13 23.8 23.8 23.9 24.0 24.1 24.1 24.5 23 9 24.2 23.9 14 23.6 23.6 23.6 23.7 23.8 23.8 24.3 23.8 24.0 23.7
TABLE 3-4. NORTH ANNA SYNOPTIC TEMPERATURE SURVEY SEPTEMBER 17, ~1981_ STATION "L" TIME (EST) DEPTil 0803 0910 1010 1115 1225 1316 1407 1514 1619 1658 Sfc 25 5 25 5 25.5 25.5 25.7 25.7 26.2 26.1 26.1 26.1 IM 25.5 25 5 25 5 25.5 25.6 25.7 26.0 26.0 25.8 26.0 2 25.5 25.5 25.5 25.5 25.5 25.7 25.9 25.8 25.7 25.8 3 25 5 25.5 25 5 25.5 25.6 25.7 25.8 25.7 25.6 25.6 4 25.5 25.5 25.5 25.5 25.5 25.7 25.8 25.6 25.6 25.6 5 25.5 25.4 25.4 25.4 25.5 25.7 25.8 25.6 25.6 25.5 6 25.5 25.4 25.4 25.4 25.4 25.6 25.7 25.6 25.5 25.5 7 25.4 25.2 25.2 25.3 25.3 25.4 25.6 25.h 24.9 25 5 8 24.9 24.6 24.6 24.6 24.9 2h.9 25.3 25.1 24.4 25.3 9 24.3 24.2 24.3 24.2 24.6 24.5 24.8 24.5 24.1 24.9 10 24.1 23 9 23 9 23.9 24.1 24.2 24.2 24.1 2h.0 24.4 11 23 9 23.9 23.8 23 9 23 9 24.1 24.2 24.0 24.0 24.0
!? 23.8 23.8 23.8 23.9 23.9 24.0 24.1 24.0 23.9 23.9 e
TABLE 3-4. NORTH AHHA SYNOPTIC TEMPERATURE SURVEY
~
SEoTEMBER 17, 1981 STATION "M" TIME (EST) DEPTH 0808 Og 1013 1107 1220 1307 1412 1509 1624 1654 Sfc 25.4 25.4 25.4 25.4 25.6 25.8 26.1 26.2 26.0 25 9 IM 25.4 25 3 25.4 25.4 25.5 25.6 25.8 25.8 25.9 25.7 2* 25.4 25 3 25.4 25.4 25.5 25.5 25.6 25.6 25.6 25.6 3 25.4 25.3 25.4 25.4 25.4 25.5 25 5 25.5 25.6 25 5 4 25.4 25.3 25 3 25.4 25.4 25.5 25 5 25.5 25.5 25.4 5 25.3 25 3 25.2 25.2 25.3 25.4 25.4 25.2 25 2 25.2 6 25.1 25.1 25 1 25.0 24.9 25.2 25 1 24.9 25.1 24.9 7 24.5 24.5 24.5 24.6 24.5 24.6 24.8 2L.6 24.8 24.6 8 24.2 24.2 24.1 24.2 24.2 24.4 24.4 24.3 24.3 24.3 9 23.9 23 9 23.9 24.0 24.0 24.3 24.3 24.1 24.2 24.1 10 23 9 23.8 23.9 23.9 23 9 24.2 24.1 24.1 24.0 23.9 11 23 9 23.7 23.9 23.8 23.8 23.9 24.0 24.0 23 9 23.8 12 23.8 23.7 23 9 23.8 23.8 23.9 24.0 24.0 23.8 23.8
LABLE 3-4 . NORTH ANNA SYNOPTIC TEMPERATURE SURVEY SEPTEMBER 17, 1981 STATION "N" TIME (EST) DEPTH 0815 0858 1020 1100 1230 1258 1420 1500 1632 1647 Sfc 25.1 25.1 25.1 25.1 25 2 25.3 25 5 25.7 25.7 25.7 l lM 25.1 25.1 25.1 25.1 25.2 25.3 25.3 25 4 25.5 25.6 i 2 25.1 25.1 25.1 25.1 25.1 25.2 25.2 25.3 25.2 25.2 3 25.1 24.9 25.1 25.0 25.1 25.1 25.1 25.3 25.1 25.1 4 24.9 24.9 24.9 24.9 25 0 25.1 25.1 25.2 25 0 25 0 5 24.9 24.9 24.8 24.8 24.8 25.1 24.9 25.1 24.8 24.9 6 24.8 24.7 24.6 24.5 24.6 24.7 24.8 24.9 24.7 24.8 7 24.1 24.1 24.1 24.2 24.2 24.4 24.4 24.7 24.5 24.4 8 23.9 23 9 23.8 23.8 24.0 24.1 24.1 24.2 24.2 24.0 9 23.8 23.6 23.7 23.6 23.8 24.0 23 9 23.9 23.8 23.8 10 23.6 23 5 23.6 23.6 23.7 23.8 23.7 23.9 23.6 23.7 11 23.6 23.5 23.5 23.5 23.6 23.7 23.7 23.8 23.6 23.6 12 23 5 23.4 23.5 23.5 23.5 23.7 23.6 23.8 23.5 23.6 4
- , . , - n
d TABLE 3-4. Il0RTH ANNA SYNOPTIC TEMPERATURE SURVEY SEPTEMBER 17, 1981 STATION "0" TIME (EST) DEPTH 0830* 0921 0958 1059 1210 1311 1111 1111 1610 1712 Sfc 26.3 26.1 26.3 25.8 26.1 25.8 26.1 26.0 26.0 25.6 IM 26.0 26.0 *26.3 25.8 26.0 25 7 26.0 25 7 25 6 25 5 2 26.0 26.0 26.3 25.7 25 9 25.6 25.8 25.3 25.4 24.8 3 25.8 25.9 26.2 25 6 25.8 25.4 25.6 25.1 25.4 24.8 4 25.8 25.7 26.1 25 5 25.6 25.3 25.3 25 1 25.2 24.7 5 25.8 25.6 25.8 25.3 25.6 25.3 25 3 25.1 25.1 24.7 6 25.4 25.5 25.7 25 1 25.6 25.1 25.2 25.1 25.1 24.5 7 25.1 25.5 25.5 25.1 25.2 24.9 25.1 24.9 24.8 24.4 8 25.0 25 5 25.4 25.2 25 2 24.9 24.9 24.7 24.8 24.7 9 25 0 25.4 25.4 25.2 25 3 24.9 25.0 24.7 24.8 24.2
- Late start due to assisting with mid lake samples and outboard motor problems.
33-
'ABLE 3 4 HORTH ANNA SYNOPTIC TEMPERATURE SUP.VEY SEPTEMBER 17, 1981 STATION "P" TIME (EST)
DEPTH 0840 OR 1006 l_0jj, 0 1219 0 lj,03,, ILO9 g 1616 1704 S fc 25 5 25.7 25.'7 - 25.7 25.4 25.5 25.6 25.3 25.'3 -25.3 IM 25.5 25 7 25 7 25.6 25 3 25.4 25.5 25 2 25.1 24.8 2 25.5 25.7 25.6 25.6 :25.2 25 3 25.4 25.1 24 9 24.7 3 25.4 25.6 25.6 25.6 25.2 25.3 25.2 25.1 20.8 24.7-4 25.4 25.4 25.5 25.5 25.2 25.3 25.1 24.9 24.8 '24.6 5 25.4 25.4 25.4 25.4 25.1 25.2 25.1 24.8 24.5 24.6 6 25.1 24.8 25.2 25.3 25.1 24.9 25.1 24.5- -24.4 24.5 7 25.1 24.8 25.2 25 1 24.6 24.5 24.8 24.4 24.0 24.0 8 24.8 24.7 25.2 25.1 24.6 24.5 24.5 24.2 24.0 23 9 9 24.8 24.7 25.2 25.1 24.6 24.5 24.4 24.3' 24.0 23.9 to 24.8 24.8 25.2 25.1 24.7 2k.6 24.4 24.3 24.0 23 9
? . TABLE 3.-4. NORTH ANNA SYNOPTIC TEMPERATURE SURVEY SEPTEMBER 17. 1981 STATION "Q" TIME (EST) DEPTH 0850 0900_ 1012 1050 1226 1300 1416 1455 1623 1700 Sfc 25.6 25.5 25.8 25.8 25.5 25.5 25.6 25.6 25.4 25.4 IM 25 5 25.4 25.7 25.8 25.5 25.5 25.6 25.5 25.0 25.1 2 25.5 25.4 25.6 25.8 25 5 25.4 25.2 25.2 24.9 25.1 3 25.4 2 5.2 25.5 25.7 25 5 25.4 25.2 25.1 26.8 24.9 4 25.3 25.2 25.4 25.5 25 5 25.3 25.1 25.1 24.7 24.8 5 24.8 24.7 25.2 25 3 25.4 25 3 25.0 24.8 24.5 24.6 6 24.8 24.8 25 0 25 0 24.9 25.2 24.9 24.6 24.3 24.5 7 24.8 24.8 25.1 25.1 24.6 24.6 24.5 24.3 24.0 24.2 8 24.8 24.8 25.1 25 1 24.6 24.5 24.2 24.2 24.0 24.0 9 24.8 24.8 25 1 25.2 24.7 24.5 24.2 24.2 24.0 24.0 10 24.8 24.8 25.1 25.2 24.7 24.5 24.2 24.2 26.0 24.0
TABLE 3 !! orth Anna Synoptic Temperature Survey floverc.be r 19, 1901 Survey Begar. - 0800 Survey Completed - 1600 Temperature - Degrees Celsius lostruments - Whitney Model Tc-Sc and Tc-5 Field Thermometers Synoptic Stations A-Q Depth in Meters
TABLE 3-5 o UORTH AUHA SYNOPTIC TEMPERATURE SURVEY NOVEMBER 19. 1961 STATION "A" TIME (EST) 4 i depth @ 0815 0815 1016 1103 1225 1308 1411 1517 1605_ Sfc 15.4 15.4 15.4 15.6 15.7 15.8 15.8 15.8 15.8 IM 15.4 15.4 15.4 15.6 15.7 15.8 15.8 15.8 15.8 2 15.4 15.4 15.4 15.5 15.7 15.7 15 8 15.8 15.8 3 15.4 15.4 15.4 15.4 15.6 15 7 15.8 15.8 15.7 4 15.4 15.4 15.4 15.4 15 5 15.6 15.8 . 15.8 15.7 5 15.4 15.4 15.4 15.4 15.4 15.6 15.8 15.8 15.7 6 15.3 15.4 15 3 15 3 15.4 15.5 15.7 15.7 15.7 7 15.3 15 3 15 3 15.3 15.4 15.5 15 7 15.6 15.6 8 14.9 15 2 15.1 15.3 14.7 15.4 15 5 15.4 15 2 9 14.9 14.8 14.8 14.8 14.5 14.6 14.6 14.5 14.7 10 14.8 14.7 14.6 14.5 14.5 14.5 14.5 14.5 14.6 11 14.6 14.6 14.6 14.5 14.5 14.5 14.5 14.5 14.5 12 14.5 14.6 14.6 14.5 14.5 14.5' 14.5 '14.5 14.5 13 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 15 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 16 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 17 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 18 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 19 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5
TABLE 3-5 . NORTH AtlNA SYtiOPTIC TEMPERATURE SURVEY l NOVEMBER 19, lobl STATiny "r,"
- TIME (EST)'
f depth E 0811 0913 1013 1107 1222 1310 1408 1515 1608 SFC '15.8 15.8 15.8 15.8 15.8 15.8 15.8 15.7 15.7 1H 15.7 15.7 15.8 15.7 15 7 15.7 15.8 15.7 15.7 2 -15.7 15.7 .15.8 15.7 15.7 15.7 15.8 15.7 15.7 3 15.7 15.7- 15.8 15.7 15.7 15.7 15.8 15.7 15.7 4 15.7 15.7 15.7 15 7 15.7 15.7 15.8 15.7 15.7 5 15.7 15.6 15.7 15.7 15.7 15.7 15.8 15.7 15.7 6 15.5 15.6 15.6 15.7 15.7 15.7 15.8 15.7 15.7 7 15.4 15.3 15.5 15.7 15.6 15.6 15.8 15 7 15.7-8 15.4 15.3 15.5 15.6 15.5 15.3 15.8 15.7 15.7 i I i d
+
m
/-
)
1
TABLE 3-5 fl0RTH ANtlA SYNOPTIC TEMPERATU'tE SURVEY WGVtMutK 13,-l981 STA T I O!! "C"
~ '~
TIME (EST) f depth E 0803 0905 1005 1114 1215 1321 1400 1506 g SFC- 15.5 15.6 15.6 15.6 15.6 15.5 15.6 15.5 15.5 1M 15.5 15.5 15.6 15.6 15.6 15 5 15.6 15.5 15.4 2 15.5 15 5 15.5 15.5 15.6 15.4 15.5 15.5 15.4 3 15.5 15.5 15.5 15.4 15.6 15.4 15.3 15.4 15.4 4 -15.5 15.3 15.4 15.0 15.4 15.2 15.2 15 3 15.4 5 15.3 15.1 15.1 15.0 15.0 15.0 15.1 15.2 15.2 6 14.7 14.6 14.6 14.6 14.6 14.6 15.0 15.1 15.0 7 .14.6 14.6 14.6 14.5 14.6 14.6 14.6 15 0 14.9 8 14.5 14.6 14.6 14.5 14.5 14.6 14.6 14.9 14.8 9 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.6 14.6 to- 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.6. 14.5 11- 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 12 14.5 14.5 14.5 14 5 14.4 14.5 14.5 14.5 14.5
.13 14.4 14.5 14.4 14.4 14.4 14.4 14.4 14.4 14.5 14 14.3 14.4' 14.4 14.4 . 14.4 14.4 14.4 14.4 14.4
! 15 14.3 14.4 14.4 14.4 14.4 14.4 14.4 14.4 14.4 16- 14.3 14.4 14.4 14.4 14.4 14.4 14.3 14.4 14.4 17 14.3 14.4 14.3 14.4 14.4 14.4 14.3 14.4 14.4 18 14.3 14.4 14.3 14.4 14.4 14.4 14.3 14.4- 14.4 19 14.3 14.4 14.3 14.4 14.4 14.4 14.3 14.4 14.4
+
J w 0
, s!
I
,w
- - - , - - - - - - - - - - - , - , - . ,y,-, ,, er v- ,e
TABLE 3-5 I! ORTH AflMA SYNOPTIC TEliPERATLRE' SURVEY NOVEMBER 19, 1961 STATION "C"
.4 TIME (EST) depth e 0819 0900 1000 '1100 1229 1303 1416 1522 1600 SFC 16.0 16.0 16.0 16.0 16.0 16.0 16.1 16.0 16.0 IM 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0- 16.0 2 16.0 16.0 16.0 15.9 16.0 16.0 16.0 16'.0 16.0 3 16.0 16.0 16.0 15.9 16.0 16.0 16.0 16.0 16.0 4 16.0 16.0 16.0 15.9 16.0 , 16.0 16.0 16.0 16.0 5 16.0 16.0 16.0 15.9 15.9 16.0 16.0 .16.0 16.0 6 16.0 16.0 16.0 15.8 15.9 15.9 16.0 15.9 16.0 7 15 9 15.9 16.0 15.7 15.8 15.6 15.9 15.9 15.9 8 15 9 15 9 15.9 15.6 15.7 15.6 15.8 15.8 15.6 9 15.8 15.9 15.8 15.6 15.7 15.6 15.7 15.6 15.5 10 15.3 15.6 15.6 15.5 15 5 15.5 15.7 15.5 15.4 11 15.2 15.4 15.4 15.4 15.4 15.4 15.4 15.4 15.4 12 15.2 15.3 15.3 15.3 15.2 15.4 15.4 15.4 15.4 13 15.2 15.2 15 3 15.3 15.2 15.2 15.3 15.4 15.4 14 15.2 15.2 15.2 15.2 15.2 15.2 15.2 15.3 15.2 15 15.2 15.2 15 2 15.2 15.2 15.1 15.1 15.3 15.2 16 15.2 15.1 15.2 15.2 15.2 15.1 15.1 15.1 15.1
-TABLE 3-5 fl0RTH AtitlA SYllCPTIC TEMPERATURE SURVEY fl0V EM BER 19. 19tl STATIO!! "C" Titit -(EST) f depth e 0807 0908 1009 1109 1220 1313 1405 1512 1612 SFC 15.7 15.8 '15.8 15.8 15.7 15.7 15 7 15.6 15.6 1M 15.7 15.7 15.7 15.8 15.7 15.7 15 7 15.6 15.6 2 15.7 15.7 15 7 15.7 15.7- 15.7 15.7 15.6 .15.6 3 15 7 15.7 15.7 15.7 15.7 15.7 15 7 15.6 15.6 4 15.7 15.7 15.7 15.7 15.6 15.7 15.6 15.6 15.6 5 15.7 15.7 15.6 15.7 15.6 15.7 15.6 15 5 15.6 6 15.5 15.6 15.4 15.6 15.6 15.6 15.6 15.5 15.5 7 15.1 15.3 15.1 15.5 15.5 15.6 15.4 15.5- 15.5 8 14.9 14.8 14.8 14.9 15.0 14.9 15.1 15.4 15.3 9 14.8 14.8 14.8 14.8 14.8 14.7 14.7 14.8 15.0 10 14.7 14.7 14.7 14.8 14.7 14.6 14.6 14.6 14.6 11 14.7 14.7 14.7 14.7 14.6 14.6 14.6 14.6 14.5 12 14.6 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 13 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 15 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 16 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 17 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 18 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5
TABLE 3-5 NORTH A'IrlA SYNOPTIC TEMPEATURE SURVEY NOVEMBER 19. 1981 STATI0t! "F" TIME (EST) I depth E -0820 0930 1000 1100 1220 1310 ~1412 1455 1550 SFC 15.3 15.4 15.4 15.5 15 5 15.5 15.5 15.5 15.5 1M 15 3 15.4 15.4 15.5 15.5 15.5 15.5 15.5 15.5 2 15.3 15.4 15.4 15.5 15.5 15.5 15 5 15 5 , 15.5 3 15 3 15.4 15.4 15.4 15.5 15.5 15.5 15.5 15.5 4 15.3 15.4 15.4 15.4 15.4 15.5 15 5 15.5 15 5 5 15.2 15 3 15.4 15.4 15.4 15.5 15.5 15.5 15.5 6 15.1 14.9 15.4 15.4 15.4 15.5 15.5 15.5 15.5 7 14.8 14.6 14.7 15.3 15.4 15.4 15.4 15.4 15.5 8 14.6 14.5 14.7 15 3 15 3 15.4 14.9 15.1 15.4 9 14.6 14.5 14.7 14.6 14.7 14.9 14.8 15.1 15.4 10 14.5 14.4 14.6 14.5 14.6 14.9 14.8 14.8 15.1 11 14.4 14.4 14.6 14.5 14.6 14.8 14.7 14.7 14.9 12 14.4 14.4 14.5 14.4 14.5 14.8 14.6 14.7 14.8 13 14.3 14.3 14.4 14.4 14.4 14.7 14.4 14.5 14.6 14 14.3 14.3 14.3 14.4 14.4 14.6 14.4 14.5 14.5 15 14.3 14.3 14.3 14.3 14.3 14.5 14.4 14.5 14.5 16 14.3 14.3 14.3 14.3 14.3 14.5 14.4 14.5 14.5
TABLE 3 ?! ORTH All'lA SYPIOPTIC TEMPERATURE SURVEY t!CVEMBER 19, 1901 STATIO!! "G" TIME (EST) I depth'E- 9115 0925 1003 1054 1215 1315 1410 1506 1555 SFC 14.2 14.2 14.2 14.3 14.5 14.5 14.6 14.7 14.8 IM 14.2 14.2 14.2 14.3 14.5 14.5 14.6 14.7 14.8 2 14.2 14.2 14.2 14.3 14.5 14.5 14.6 14.7 14.8 3 14.1 14.2 14.2 14.2 14.5 14.5 14.6 14.7 14.8 4 14.1 14.2 14.2 14.2 14.4 14.5 14.5 14.7. 14.8 5 14.1 14.2 14.2 14.2 14.4 14.5 14.5 14.6 14.8 6 14.1 14.2 14.2 14.2 14.3 14.5 14.5 14.6 14.7 7 14.1 14.1 14.2 14.2 14.3 14.5 14.5 14.6 14.7 8 14.1 14.1 14.2 14.2 14.3 14.4 14.5 14.5 14.6 9 14.1 14.1 14.1 14.2 14.3 14.3 14.4 14.3 14.6 10 14.1 14.1 14.1 14.2 14.3 14.3 14.3 14.3 14.5 11 14.0 14.0 14.1 14.1 14.2 14.1 14.2 14.2 14.3 12 14.0 13 9 14.1 14.0 14.1 14.1 14.1 14.1 14.2 13 13.9 13.8 13 9 14.0 14.0 13.8 13.9 14.0 14.1 14 13.8 13 7 13 9 14.0 13.8 13.8 13.7 13.8 13.9 15 13.8 13.7 13 8 13.8 13.8 13.8 13.7 13.8 13.8 16 13 7 13 7 13.7 13.8 13.7 13.8 13.7 13.8 13.8 17 13.7 13.7 13.7 13.7 13.7 13.8 13 7 13.8 13.8
TABLE 3-5 o !!ORTil Al:t:A SYtl0PTIC TE,u.PERATURE SURVEY NOVtNbth lj, 1341-STATIOrl "H" TIME (EST) I depth E 0812 0923 1006 1052 1211 1318 1409 1505 1558 SFC 14.0 14.1 14.1 14.1 14.2 14.2 14.2 14.2 14.2 1H 14.0 14.1 14.1 14.1 14.2 14.2 14.2 14.2 14.2 2 14.0 14.1 14.1 14.1 14.1 14.2 14.1 14.2 14.2 3 14.0 14.0 14.1 14.1 14.1 14.1 14.1 14.2 14.2 4 14.0 14.0 14.1 14.1 14.1 14.1 14.1 14.1 14.2 5 14.0 14.0 14.1 14.1 14.1 14.0 14.1 14.1 14.1 6 14.0 14.0 14.1 14.1 14.0 14.0 14.1 14.1 14.1 7 14.0 14.0 14.1 14.1 14.0 14.0 14.1 14.1 14.1 8 14.0 14.0 14.1 14.0 13.9 14.0 14.1 14.1 14.1 9 14.0 14.0 14.0 -14.0 13.9 13.9 14.0 14.1 14.1 to 14.0 14.0 13.9 13.9 13.8 13.9 13.9 14.0 14.1 11 13.8 13.9 13.8 13.9 13.8 13.8 13.8 13 9 13.8 12 13.7 13.7 13.7 13 9 13.8 13.8 13.8 13.8 13.8 13 13.7 13.7 13.7 13.8 13.8 13.7 13.8 13.8 13.8 14 13.6 13.6 13.7 13.8 13.7 13.6 13.7 13.7 13.7 15 13.2 13.4 13.6 13.6 13 2 13.4 13.6 13.6 13.4 16 13.2 13.1 13 3 .13.2 13.2 13.4 13.2 13.2 13.3
TABLE 3-5 HORTH A!!!1A SYt!0PTIC TEMPERATURE SURVEY
~
NOVEMBER 19, 1981 STATIOri "r" TIME (EST) I depth E D3DD 0915 1Q13 1252 1200 1330 1400 1510 1600 SFC 13.8 13 9 14.0 14.0 14.2 14.1 14.1 14.1 14.1 IM 13.8 13.9 14.0 14.0 14.2 14.1 ~1 4.1 14.1 14.1 2 13.8 13 9 14.0 ' 14.0 14.2 14.1 14.1 14.1 14.1 3 13.8 13.9 14.0 14.0 14.1 14.1 14.1 14.1 14.1 4 13.8 13.9 13.9 14.0 14.1 14.1 14.1 14.1 14.1 5 13.8 13.8 13.9 13 9 14.1 14.1 14.1 14.1 14.1 6 13.8 13.8 13.9 13.9 14.0 14.0 14.1 14.1 14.1 7 13 7 13.8 13.9 13.9 14.0 14.0 14.1 14.1 14.1 8 13.7 13.8 13.9 13.8 13.9 14.0 14.1 14.0 14.1 9 13.6 13 7 13.9 13.8 13.9 13 9 14.1 13.9 14.1 10 13.6 13.7 13.3 13.7 13 9 13 9 14.0 13.8 14.0 11 13 5 13.7 13.8 13.7 13.9 13.9 13.9 13.8 13.8 12 13.4 13.4 13 7 13.7 13.5 13 7' 13.8 13.8 -13.7 13 13.1 13.3 13.4 13.6 13.1 13.2 13.2 13 3 13.4 14 13.0 13.0 13.1 13 0 13.0 13.0 13.1 12.7 12.9 15 13.0 13.0 12.9 13.0 13.0 13.0 13.0 12.7 12.8
TABLE 3-5 NORTH AfslA SYr10P7tC TEMPERATURE SURVEY fl0VEMBER 19, 1961 STAT 10i! "J" TIME (EST) I depth E 0806 0920 1070 (Qig 1205 1322 L4Q5 1505 1604 SFC 13.7 13.8 13 9 -13.9 13.9 14.0 14.0. 13.9 13.9 IM 13 7 13.8 13 9 13.8 13.9 13.9 14.0 13.9 13.9 2 13.7 13.8 13.9 13.9 13.9 13 9 14.0 13.9 13 9 3 , 13 7 13.8 13.8 13.8 13 9 13.9 13.9 13.9 13.9 4 13.7 13.8 13.8 13.8 13.9 13 9 13.9- 13.9 13.9 5 13.7 13.8 13.8 13.8 13.8 13.9 13 9 13.8 13 9 6 13 7 13.8 13.8 13.8 13.8 13.8 13.9 13.8 13.8 7 13.7 13 7 13.8 13.8 13.8 13.8 13.8 13.7 13.7 8 13.7 13 7 13.8 13.8 13.8 13.7 13.8 13.7 13.7 9 13.7 13.7 13.7 13.7 13.7 13.7 13.8 13.6 13.6 10 13.7 13.6 13.6 13 7 13 7 13.6 13.7 13.6 13.6 11 13.7 13 5 13 5 13.7 13.7 13.6 13.6 - 13.5 13.5 12 13.6 13.4 13.5 13.5 13.6 13 5 13.6 13.4 13.5 13 13 5 13.4 13.5 13 5 13.5 13.5 13.5 13.2 13.4 14- 13.4 13.4 13.5 13.4 13.4 13.3 13.4 -13.2 13.2 15 13.3 13.4 13.4 13.4 13.4 13 3 13 3 13 2 13.2 16 13 3 13.4 13.4 13.4 13.4 13 3 13 3 13 2 13 2
s TABLE 3-5 710RTH AfillA SYt!0PTIC TEttPERATURE SURVEY T10V EM BER 19, 1981 . STATI0li "i;" TIME (EST) I depth E 0850 0912 1,001 1108 1209 1312 1404- 1504 1602 SFC 13.5 13.6 13.7 .14.1 14.2 14.5 14.5 14.5 '14.4 1H 13.5 13.6 13 7 14.1 14.2 14.5 14.5 14.5 14.4 2 13 5 13.6 13.7 14.0 14.1 14.5' 14.5 14.5 14.4 3 13.5 13.6 13.7 14.0 14.1 14.5 14.5 14.5 14.4 4 13.6 13.6 13.7 13.9 14.1 14.5 14.4 14.5 14.4 5 13.6 13.6 13.7 13.9 14.0 14.4 14.4 14.4 14.3 6 13.6 13.6 13.6 13.8 14.0 14.3 14.3 14.4 14.3 7 13.6 13.6 13.6 13.8 14.0 14.3 14.3 14.3 14.3 8 13.5. 13.6 13.6 13.8 14.0 14.3 14.3 14.3 14.3 9 13.5 13.6 13.6 13.8 14.0 14.3 14.3 14.3 14.3 10 13 5 13.6 13.5 13.8 14.0 14.3 14.3 14.3 14.3 11 13.5 13 5 13.5 13.7 14.0 14.3 14.3 14.3 14.3 12 13.5 13 5 13.5 13.7 14.0 14.3 14.3 14.3 14.3 13 13.5 13.4 13.5 13.7 13.9 14.2 14.3 14.3 14.3 14 13.0 13.0 13.5 13.7 13.9 14.2 14.2 14.3 14.3
~ - . _ . ..
~
TABLE'3 HORTH Af.NA SV:iOPTic TEMPERATURE SURVEY. NOVEMBER 19, 1981 STATION "L" TIME (EST) t-depth e 0855 0918 1010 1104 1213 1307 1459 1500 1557 SFC 13.4 13.5 13.5 13.7 13.7 13 9 13 9 13 9 13.8 IM 13.4 13 5 13 5 13 7 13 7 .13.9 13.9 13 9 13.8 2 13.4 13.5 13.5 13.7 13.7 13.9 13.8 13.9 13.8 3 13.4 13.4 13.5 13.7 13.7 13.9 13.8 13.8 13.8 4 13.4 13.4 13.4 13.6 13.6 13.8 13 9 13.8. 13.8 5 13.3 13.2 13.3 13.6 13.6 13.4 13.7 13.8 13.7 6 13.0 13.0 13 1 13.4 13 5 13.3 13.6 13.7 13.7 7 12.9 12 9 13.0 13.1 ~13.2 13.2 13.5 13 3 13.6 8 12.9 12.9 12.9 13.0 13.1 13.1 13.2 13.3 13.2 9 12.9 12.8 12.9 12.9 13 0 13.1 13.1 13 2 13.2 to 12.7 12.8 12.8 12.9 13.0 13.1 13 1 13.2 13.1 1 11 12.5 12.8 12.7 12.9 13.0 13.1 13.1 13.2 13.1 12 12.5 12.7 12.7 12 9 13.0 13.1 13.1 13.2 13.1 } t k I
e TABLE .-3-5 NORTH AMMA SYl.0PTIC TEMPERATURE SURVEY NOVEMBER 19, 1981 STAT 10N "M" TitiE (EST) i depth E 0840 0925 1016 1056 1220 1300 1416 1452 1550 SFC 12.4 12.5 12.7 12.8 13.1 13.1 13.4 13.4 13 2 1H 12.4 12.5 12.7 12.8 13.1 13.1 13.4 13.4 13 2 2 12.4 12.5 12.7 12.8 13.1 13.1 13.4 13.4 13.2 3 12.3 12.4 12.6~ 12.8 13.1 -13.0 13.4 13.4 13.2' 4 12.2 12.4 12.5 12.8 13.2 13.0 13.3 13.3 13.2 5 12.1 12.4 12.3 12.6 13 0 12.9 13.3 13.0 13.1 6 12.0 12 3 12.2 12.4 13.0 12.6 13.1 12.7 12.8 7 12.0 12.3 12.2 12.3 12.9 12.4 12.9 12.4 12.4 8 12.0 12.1 12.1 12.3 12.4 12.3 12.5 12.4 12.3 9 12.0 12.0 12.0 12.2 12.3 12.3 12.4 12.4 12.3 10 11.9 12.0 12.0 12.2 12.3 12.3 12.4 12.4 12.3 11 11 9 11.9 12.0 12.2 12.3 12.3 12.4 12.4 12.3 12 11.9 11.9 12.0 12.2 12.3 12 3 12.4 12.5 12.3
TABLE 3- 5 NORTH Atma SYt10PTIC TEMPERATURE SURVEY iiovtMuta 69. iyos STATION "fl" TIME (EST) I depth e 0815 0931_ 1021 1050 1228 1252 1423 1446 1542 SFC 11.7 11.8 12.0 12.0 12.2 12.2 12.4 12.4 12.2 1M 11.7 11.8 12.0 12.0 12.1 12.2 12.4 12.4 12.2 2 11 7 11.8 11.9 12.0 12.1 12.2 12.4 12.4 12.2 3 11.7 11.8 11 9 11 9 12.1 12.2 12.3 12 3 12.2 4 11.7 11.8 11.9 12.0 -12.1 12.1 12.3 12.3 12.2 5 11.8 11.8 11.9 12.0 12.0 12.1 12.2 12.2 12.2 6 11.8 11.8- 11.9 12.0 -12.0 12.1 12.1 12.1 12.1 7 -11.8 11.8 11.9 12.0 12.0 - 1 :2. 0 12.0 12.1 12.1 8 11.8 11.8 11.9 12.0 12.0 12.0 12.0 12.0- 12.0 9 11.8 11.8 11.9 11.9 12.0 12.0 12.0 12.0 12.0 10 11.8 11.8 11.8 11.9 12.0 12.0 12.0 12.0 11.9 11 11.8 11.8 11.8 11.9 12.0 12.0 12.0 12.0 12.0 12 11.8 12.0 l l l i ? I l l l
'l TABLE 3-5 -100 - l i
?! ORTH AH!!A 5 60PTlC TEMPERATURE SURVEY ucV EMBER 19, 1981 l STAT 10tl "0" TIME (EST) i depth E QlD1 0910 1006 1110 -12 03, 1112 1410 till 1610 SFC 10.7 10.9 11.0 11.2 11.2 11.4 11.6 11.6 .11.7 IM '10.7 10.9 11.0 11.2 11.2 11.3. 11.4 11.4 11.5 2 10.6 10.8 11.0 11.1 11.2 11.2 11.3 11.2 11.2 3 10.5 10.8 10.8 11.1 11.1 11.2 11.2 11.1 -11.2 4 10.5 10.7 10.7 10.9 10.8 ~11.0 11.1 11.0 11.0 5 10.4 10.6 10.6 10.7 10.7 10.7 10.8 10.8 10.9 6 10.4 10.5 10.6 10.6 10.6 10.6 10.5 10.5 10.8 7 10.4 10.5 10.6 10.5 10.6 10.5 10.5 10.5 10.6 8 10.4 10.5 10.6 10.5 10.5 10.4 10.4 10.4 10.5 l
1 J 2 4 _,ee., . - - . . , _ _ . . -. - _ _ - - - . _ . , _ _ _ -
TABLE 3-5 -101 - - HORTH ANNA SYNOPTIC TEMPERATURE SURVEY _ NOVLMutK Fj , 0 01 STATIO!! "P" TltE (EST) f depth $ 0816 0905 1016 1100 1220 1305 1420 1507 1609 SFC 10 3 10.3 10.7 10.8 10.9 11.0 11 3 11.2 11.1 IM 10 3 10.3 10.6 10.7 10.8 10.9 11.2 11.2 11.1 2 10 3 10 3 10.6 10.7 10.8 10.9 11.1 11.1 11.0 3 10 3 10 3 10.6 10.6 10.7 10.8 10.9 10.9 11.0 4 10 3 10.3 10.5 10.6 10.6 10.6 10.8 10.7 10.9 5 10 3 10 3 10 5 10.6 10.5 10.5 10.3 10.6 lO.7 6 10 3 10.3 10 5 10.5 10.4 10.5 10.6 10.6 10.6 7 10 3 10.3 10.4 10.5 10.4 10.4 10.6 10.5 10.6 8 10 3 10.3 10.4 10.4 10.4 10.4 10.5 10.5 10.5 9 10 3 10.3 10.4 10.4 10.4 10.4 10.5 10.5 10.5 10 10.2 10.3 10.4 10.4 10.4 10.4 10.4 10.4 10.5 11 I i
s TABLE 3-5. -102-
'10RTH Alli:A SYliOPTIC TEMPEftATURE SURVEY r10VEM F.E R 19'1951 STAT I ON "Q" TIME (EST) i '
N depth e 0825 0900- 1055 1227 1300 1427 1500 1600 SFC 10.5 -10.5 10.9 11.0 11.0 11.2 11.2 11 3 11.4 1M 10.5 .10.5 10.8- 10.9 11.0 11.1 11.1 11.3 11 3
? 10.5 10.5 10.8 10.8 10.9- 11.0 11.1 11.2 11.2 3 10.5 10.5 10.7 10.7 10.9 10 9 11.1 11.2 11.2 4 10.5 10.5 10.7 10.7 10.8 10.8 11.2 11.1 11.1 5 10.5 10.5 10.7 10.7 10.7 10.7 10.9 11.0 11.1 6 10 5 10.5 10.7 10.7 10.7 10.7 10.9 11.0 11.1 7 10.5 10.5 10.7 10.7 10.7 10.7 10.8 10 9 10.9 8 10.5 10.5 10.7 10.7 10.6 10.6 10.8 10.8 10.8 9 10.5 10.5 10.7 10.7 10.6 10.6 .10.7 10.7 10.7 10 10.5 10.5 10.7 10.7 10.6 10.6 10.6- 10.6 10.6 .11 10.5 10.5 10.7' 10.6 10.6 10.6 10.6 10.6 -10.6
TABLE 3- 6. HATER QUALITY DATA COLLECTED FROH LAKE At04A Ate THE WASTE HEAT TREATHENT FACILITY (LAG 00ftSI DURING JANUARY 1981. DEPTH TEMPER- DISSOLVED PERCEffT PH ALKAL- TURB- tet3 H03_H 0-PO4 H_PO4 T_PO4 SO4 CU FE PB ZH AIURE OXYCEN SATURAT10tl IHITY IDITY t1G/L t1G/L tlG/L t1G/L MG/L t1G/L MG/L t:G/L t1G/ L t:G/L C t1G/L t1G/L HTU CACO 3 STATION -- DAM 0 5.0 12.6 98.4 6.6 12.0 1.9 . . . . . . . . . . . 1 5.0 12.6 98.4 . . . . . . . . . . . . . 2 5.0 12.8 100.0 . . . . . . . . . . . . . 3 5.0 12.8 100.0 . . . . . . . . . . . . . 4 4.9 12.8 99.8 . . . . . . . . . . . . . 5 4.9 12.8 99.8 . . . . . . . . . . . . . 6 4.8 12.8 99.5 . . . . . . . . . . . . . 7 4.8 12.8 99.5 . . . . . . . . . . . . . 8 4.8 12.8 99.5 . . . . . . . . . . . . . 9 4.8 12.8 99.5 . . . . . . . . . . . . . 10 4.8 12.8 99.5 6.8 12.0 1.9 . . . . . . . . . . 11 4.8 12.8 99.5 . . . . . . . . . . . . 12 4.7 12.7 98.5 . . . . . . . . . . . . . c) 13 14 4.7 12.7 12.7 98.5 98.5 T 4.7 . . . . . . . . . . . . . 15 4.6 12.7 98.2 . . . . . . . . . . . . . 16 4.5 12.7 98.0 . . . . . . . . . . . . . 17 4.4 12.7 97.7 . . . . . . . . . . . . . 18 4.4 12.6 96.9 6.7 14.0 17.0 . . . . . . . . . . STATION -- IllTAKE 0 2.9 13.2 97.7 7.1 12.0 2.2 . . . . . . . . . . 1 2.9 13.2 97.7 . . . . . . . . . . . . . 2 2.9 13.1 96.9 . . . . . . . . . . . . . 3 2.9 13.1 96.9 .' . . . . . . . . . . . . 4 2.9 13.1 96.9 . . . . . . . . . . . . . 5 2.9 13.2 97.7 . . . . . . . . . . . . . 6 2.9 13.2 97.7 6.9 12.0 2.0 . . . . . . . . . . 7 2.9 13.2 97.7 . . . . . . . . . . . . . 8 2.9 13.2 97.7 . . . . . . . . . . . . . 9 3.1 13.2 93.2 . . . . . . . . . . . . . 10 3.1 13.2 98.2 . . . . . . . . . . . . . Il 3.1 13.1 97.4 7.1 13.0 2.4 . . . . . . . . . . 12 3.1 11.3 84.0 . . . . . . . .. . . . . . M _ _._ _ e _ _ _______ _ _ - _ _ _ _
e TABLE 3- 6. HATER QUALITY DATA COLLECTED FRON LAKE A!NA Ate THE WASTE HEAT TREATHEtiT FACILITY ILAGOOHS) DUR1tIG J AtAJARY, 1981. DEPTH T Et1PER- DISSOLVED PERCENT PH ALKAL- TURB- tal3 H03_H 0-PO4 N_PO4 T_PO4 SO4 CtJ FE PB Zil ATURE OXYGEtt SATURATION It1ITY IDITY t1G/L NG/L t1G/L f1G/L NG/L NG/L ttG/L ttG/L t1G/L #1G/L C HG/L NG/L IITU CACO 3 STATIDH -- RT 206 BRIDGE O 3.6 12.6 95.0 6.7 13.0 1.5 . . . . . . . . . . 1 3.5 13.0 97.7 . . . . . . . . . . . . . 2 3.4 13.2 99.0 . . . . . . . . . . . . . 3 3.4 13.4 100.5 . . . . . . . . . . . . . 4 3.4 13.5 101.2 . . . . . . . . . . . . . 5 3.3 13.6 ,101.7 . . . . . . . . . . . . . 6 3.3 13.7 102.4 7.1 13.0 1.5 . . . . . . . . . . 7 3.3 13.8 103.2 . . . . . . . . . . . . . 8 3.3 13.6 101.7 . . . . . . . . . . . . . 9 3.5 12.8 96.2 . . . . . . . . . . . . . 10 3.8 12.2 92.4 . . . . . . . . . . . . . 11 4.0 10.4 79.2 6.9 15.0 1.9 . . . . . . . . . . 2 12 4.0 10.2 77.7 . . . . . . . . . . . . . C) 9 STATI0tl -- HORTH AttiA ARM 0 4.1 12.3 93.9 7.0 18.0 3.0 . . . . . . . . . . 1 4.1 12.2 93.1 . . . . . . . . , . . . . 2 4.1 12.2 93.1 . . . . . . . . . . . . . 3 4.1 12.2 93.1 . . . . . . . . . . . . . 4 4.1 12.1 92.4 7.0 19.0 3.3 . . . . . . . . . . 5 4.1 12.2 93.1 . . . . . . . . . . . . . 6 4.1 12.1 92.4 . . . . . . . . . . . . . 7 4.3 12.0 92.1 . . . . . . . . . . . . . 8 4.3 12.0 92.1 7.2 20.0 4.0 . . . . . . . . . . 9 4.4 11.4 87.7 . . . . . . . . . . . . . STAT 10H -- PAttJtEEY ARM 0 4.1 12.6 96.2 7.1 18.0 2.9 . . . . . . . . . . 1 4.1 12.8 97.7 . . . . . . . . . . . . . 2 4.1 12.8 97.7 . . . . . . . . . . . . . 3 4.1 12.8 97.7 . . . . . . . . . . . . . 4 4.2 12.7 97.2 7.0 16.0 2.9 . . . . . . . . . . 5 4.3 12.6 96.7 . . . . . . . . . . . . . 6 4.3 12.0 92.1 . . . . . . . . . . . . .
- 7 4.3 11.9 91.3 . . . . . . . . . . . . .
8 4.3 11.9 91.3 7.0 17.0 3.2 . . . . . . . . . . I
TABLE 3- 6. HATER QUALITY DATA COLLECTED FROM LAKE AIR 4A AfD THE WASTE HEAT TREATHEtIT FACILITY 4 LAG 00HS) DURItG JAtMARY, 1981. DEPril TEttPER- DISSOLVED PERCENT Pil ALKAL- TURB- t413 HO3_H 0-PO4 N_PO4 T_PO4 SO4 CU FE PB 2H ATURE OXYGEli SATURATI0tt INITY 10!TY t1G/L NG/L tG/L F1G/L t1G/L ttG/L ttG/L tG/L tG/L iG/L C t1G/L ttG/L llTU CACO 3 STATION -- CotiTRART CREEK BRI 0 4.8 12.6 97.9 6.7 11.0 1.2 . . . . . . . . . . 1 4.5 13.1 101.1 . . . . . . . . . . . . . 2 4.4 13.3 102.3 . . . . . . . . . . . . . . 3 4.4 13.5 103.9 6.7 11.0 1.3 . . . . . . . . . . 4 4.4 13.6 104.6 . . . . . . . . . . . . . 5 4.7 12.8 99.2 . . . . . . . . . . . . . 6 5.2 9.5 74.6 . . . . . . . . . . . . . 7 5.9 9.3 74.3 3.9 N 20.0 . . . . . . . . . . 8 6.0 8.1 64.9 . . . . . . . . . . . . . STATI0t4 -- LAG 00t1 1 , o m 0 12.0 13.0 120.1 6.8 14.0 2.4 . . . . . . . . . . a 1 12.0 13.0 120.1 . . . . . . . . . . . . . 2 12.0 15.0 120.1 . . . . . . . . . . . . . 3 12.0 13.0 120.1 . . . . . . . . . . . . . 4 11.8 13.0 119.5 . . . . . . . . . . . . . 5 11.8 13.0 119.5 6.9 15.0 2.2 . . . . . . . . . . 6 11.7 13.1 120.2 . . . . . . . . . . . . . 7 11.7 13.0 119.3 . . . . . . . . . . . . . 8 11.7 13.0 119.3 , . . . . . . . . . . . . 9 11.5 13.0 118.7 . . . . . . . . . . . . . 10 11.0 12.8 115.6 6.9 16.0 8.5 . . . . . . . . . . STAT 10t1 -- LAG 0004 2 0 8.6 12.7 10S.5 7.0 16.0 2.4 . . . . . . . . . . 1 8.6 12.6 107.6 . . . . . . . . . . . . . 2 8.2 12.6 106.6 . . . . . . . . . . . . . 3 8.0 12.4 104.4 . . . . . . . . . . . . . 4 7.5 12.4 103.1 . . . . . . . . . . . . . 5 7.2 12.4 102.4 . . . . . . . . . . . . . 6 7.0 12.4 101.9 6.8 15.0 2.8 . . . . . . . . . . 7 6.9 12.4 101.6 . . . . . . . . . . . . . 8 6.9 12.4 101.6 . . . . . . . . . . . . . 9 6.8 12.4 101.4 . . . . . . . . . . . . .
- 30 6.7 12.3 100.3 . . . . . . . . . . . . .
11 6.7 12.3 100.3 . . . . . . . . . . . . . 12 6.7 4.8 39.1 7.0 14.0 3.0 . . . . . . . . . .
TABLE 3- 6. HATER QUALITY DATA COLLECTED FROM LAKE AlalA Ate THE WAS1E HEAT TREATHEtIT FACILITY (LAC 00llSi DURING J AIAJARY , 1981. OEPTH TEt1PER- DISSOLVED PERCENT PH ALKAL- TUR8- F813 NO3_H 0-PO4 H_PO4 T_PO4 504 CU FE PO ZH A1URE OxfGEli SATURATIDH INITY IDITY NG/L NG/L NG/L NG/L NG/L NG/L NG/L NG/L NG/L NG/L C NG/L NG/L HTU CACO 3 STATION -- LAG 00ti 3 0 6.5 12.7 103.1 6.9 17.0 3.3 . a. . . . . . . . . 1 6.1 12.7 102.0 . . . . . . . . . . . . . 2 6.0 12.6 101.0 . . . . . . . . . . . . . 3 6.0 12.6 101.0 . . . . . . . . . . . . . 4 6.0 12.6 101.0 . . . . . . . . . . . . . S 5.9 12.6 100.7 . . . . . . . . . . . . . 6 5.8 12.5 99.7 6.7 16.0 3.4 . . . . . . . . . . 7 5.4 12.4 97.9 . . . . . . . . . . . . . 8 5.4 12.4 97.9 . . . . . . . . . . . . . 9 5.4 12.2 96.3 . . . . . . . . . . . . . 10 5.3 11.4 89.8 . . . . . . . . . . . . . 11 5.2 6.8 53.4 . 12 5.2 7.0 55.0 6.9 14.0 6.5 . . . . . . . . . . C) cn STAT 10tl -- ELK CREEK 0 8.1 12.6 106.3 6.8 13.0 2.3 . . . . . . . . . . I 6.9 12.7 104.1 . . . . . . . . . . . . . 2 6.1 12.7 102.0 . . . . . . . . . . . . . 3 5.8 12.8 102.1 . . . . . . . . . . . . . 4 5.0 13.0 101.6 6.8 14.0 2.3 . . . . . . . . . . 5 4.8 13.1 101.8 . . . . . . . . . . . . . 6 4.2 15.1 100.3 . . . . . . . . . . . . . 7 4.1 13.2 100.8 . . . . . . . . . . . . . 8 4.2 13.2 101.0 6.9 14.0 3.4 . . . . . . . . . . STAT 10tl -- NILLPUHD CREEK '~ 0 7.0 12.6 101.5 6.9 15.0 2.2 . . . . . . . . . . 1 6.6 12.6 102.5 . . . . . . . . . . . . . 2 4.9 12.8 99.8 . . . . . . . . . . . . . 3 4.7 13.0 100.8 . . . . . . . . . . . . . 4 4.2 13.0 99.5 . . . . . . . . . . . . . 5 4.2 13.0 99.5 6.9 14.P 2.5 . . . . . . . . . . 6 4.1 13.1 100.0 . . . . . . . . . . . . . 7 4.0 13.0 99.0 . . . . . . . . . . . . .
- C 8 4.0 13.0 99.0 . . . . . . . . . . . . .
9 4.0 13.0 99.0 6.9 15.0 2.4 . . . . . . . . . .
TAeLE 3- 7. WATER QUALITY DATA COLLECTED FR0ft LME Al8tA Atm THE WASTE ItEAT TREAlttEt(T FACILITY (LAGOONSI Dt5titG FEBRUARY. 1981. PERCENT PH ALKAL- TISB- 6413 H03_N 0-PO4 H_PO4 T_PO4 SO4 CU FE PB Zil , DEPTil TEt1PER- DISSOLVED AllDE OXYGEtt SATURATION IHITY IDITY t1G/L NG/L t1G/L t1G/L t1G/L ttG/L F1G/L t1G/L ttG/L t13/L C HG/L ttG/L HTU CACO 3 STATIDH -- DAM 0 8.2 11.8 99.8 6.7 13.0 3.8 . . . . . . . . . . 1 8.2 11.8 99.8 . . . . . . . . . . . . . 2 8.2 11.8 99.8 . . . . . . . . . . . 3 8.1 11.8 97.2 . . . . . . . . . . . . . 4 7.9 11.8 99.1 . . . . . . . . . . . . 5 7.6 11.8 98.4 . . . . . . . . . . . 6 7.0 11.8 96.9 . . . . . . . . . . . . 7 6.9 11.8 96.7 . . . . . . . . . . . . . 0 6.7 11.8 96.2 6.7 11.0 3.5 . . . . . . . . . . 9 6.0 11.8 94.6 . . . . . . . . . . . 10 5.7 11.8 91.9 . . . . . . . . . . . . . Il 5.6 11.8 93.6 . . . . . . . . . . . . . J.
. . . . . c3 12 5.3 12.0 9 't . 5 . . . . . .
]f 13 5.3 11.9 91.7 . . . . . . . . . . . . .
14 5.3 12.0 94.5 . . . . . . . . . . . . . 15 . 5.3 12.0 94.5 . . . . . . . . . 16 5.3 12.0 94.5 6.6 32.0 15.0 . . . . . . . . . . 17 5.3 12.0 94.5 . . . . . . . . . . . . . STATION -- IHTAKE O 5.6 12.6 100.0 6.7 9.0 3.5 . . . . . . . . . . 1 5.5 12.7 100.5 . . . . . . . . . . . . . 2 5.5 12.8 101.3 . . . . . . . . . . . . 3 5.5 12.6 99.7 . . . . . . . . . . 4 5.4 12.7 100.2 . . . . . . . . . . . . . 5 5.4 12.7 100.2 . . . . . . . . . . . . 6 5.4 12.7 100.2 6.8 18.0 3.3 . . . . . . . . . . 7 5.1 12.7 99.5 . . . . . . . . . . . . 8 5.1 12.7 99.5 . . . . . . . 9 4.9 12.7 99.0 . . . . . . . 10 4.9 12.7 99.0 . . . . . . . . . . . . . 11 4.9 12.7 99.0 6.6 13.0 3.0 . . . . . . . . . . 12 4.9 12.6 98.2 . . . . . . . . . . . . m L___
TABLE 3- 7. HATER QUALITY DATA COLLECTED FROM LAKE A!B4A AIE) 1HE b4ASTE HEAT TREATHEtiT FACILITY (LAG 00t4SI DUWitG FEBRUARY. 1981. DEPTH T EttPER- DISSOLVED PERCENT PH A LK A L- TURB- tel3 H03_H 0-PO4 H.PO4 T_PO4 504 CU FE PB ZH ATURE OXfGEtt SATURATION It4ITY IDITY NG/L PG/L t1G/L NG/L t1G/L NG/L tG/L tG/L N3/L tG/L C ttG/L ' ttG/L tlTU CACO 3 ST ATION -- RT 208 BRIDGE O 5.4 12.2 96.3 6.5 13.0 2.5 . . . . . . . . . . 1 5.4 12.4 97.9 . . . . . . . . . . . . . 2 5.4 12.4 97.9 . . . . . . . . . . . . . 3 5.3 12.4 97.6 . . . . . . . . . . . . . 4 S.3 12.4 97.6 . . . . . . . . . . . . . 5 S.3 12.4 97.6 . . . . . . . . . . . . . 6 5.2 12.4 97.4 6.6 13.0 2.0 . . . . . . . . . . 7 5.0 12.4 96.9 . . . . . . . . . . . . . 8 4.9 12.4 96.6 . . . . . . . . . . . . . 9 4.7 12.4 96.1 . . . . . . . . . . . . . 10 4.7 12.2 94.6 . . . . . . . . . . . . . 11 4.7 12.2 94.6 6.6 12.0 2.9 . . . . . . 12 4.7 12.2 94.6 . . . . . . . . . . . . . O ca e STATIDH -- HORTH AttlA ARM e 0 7.3 13.0 107.6 6.9 19.0 10.0 . . . . . . . . . . 1 6.9 13.1 107.4 . . . . . . . . . . . . . 2 6.5 13.1 106.3 . . . . . . . . . . . . . 3 6.4 13.0 1C5.2 6.7 19.0 9.4 . . . . . . . . . . 4 6.3 12.8 103.3 . . . . . . . . . . . . . 5 6.1 12.6 101.2 . . . . . . . . . . . . . 6 6.0 12.6 101.0 6.8 19.0 9.6 . . . . . . . . . . 7 5.8 12.5 99.7 . . . . . . . . . . . . . STATIOli -- PANUta(EY ARM 0 6.9 12.0 98.3 6.5 14.0 5.4 . . . . . . . . . . 1 6.8 12.0 98.1 . . . . . . . . . . . . . 2 6.3 12.0 96.9 . . . . . . . . . . . . . 3 6.1 12.0 96.4 6.8 17.0 5.2 . . . . . . . . . . 4 5.6 11.8 93.6 . . . . . . . . . . . . . 5 5.3 11.6 91.3 . . . . . . . . . . . . . 6 5.2 11.5 90.3 6.6 16.0 6.7 . . . . . . . . . . 7 5.2 10.9 85.6 . . . . . . . . . . . . . I
TABLE 3- 7. HATER f5JALITY DATA COLLECTED FR0tt LAKE AtalA Ate THE HASTE HEAT TREATt1ENT FACILITY (LAGCONSI DURIt4G FEBRUARY, 1981. DEP1H T[r1PER- DISSOLVED PERCENT PH ALKAL- TURB- tat 3 H03_H 0-PO4 t1_PO4 T_PO4 SO4 CU FE PB 2H ATURE OXVGEll SATURATION INITY IDITY FIG /L t1G/L tG/L NG/L t1G/L tG/L NG/L t1G/L NG/L NG/L C tG/L 11G/L HTU CACO 3 STAT 10tl -- CONTRARY CREEK BAY 0 7a0 12.0 98.6 6.5 9.0 2.3 . . . . . . . . . . I 6.8 12.2 99.7 . . . . . . . . . . . . . 2 6.3 12.2 93.5 . . . . . . . . . . . . . 3 5.8 12.2 97.3 . . . . . . . . . . . . . 4 5.5 12.2 96.5 . . . . . . . . . . . . . 5 4.9 12.4 96.6 6.4 10.0 2.5 . . . . . . . . . . 6 4.7 12.4 96.1 . . . . . . . . . . . . . 7 4.6 12.3 95.1 . . . . . . . . . . . . . . 8 4.6 12.2 94.4 . . . . . . . . . . . . . 9 4.6 12.2 94.4 6.4 10.0 2.5 . . . . . . . . . . STAT 10tl -- LAGOOH 1 1. o w e 0 13.6 12.4 118.6 6.7 14.0 2.7 . . . . . . . . . . 1 13.6 12.4 118.6 . . . . . . . . . . . . . 2 13.6 12.4 118.6 . . . . . . . . . . . . . 3 13.6 12.5 119.6 . . . . . . . . . . . . . 4 13.6 12.5 119.6 6.7 15.0 2.7 . . . . . . ' . . . . 5 13.6 12.6 120.5 . . . . . . . . . . . . . 6 11.6 12.6 120.5 . . . . . . . . . . . . . 7 13.6 12.6 120.5 . . . . . . . . . . . . . 8 13.6 12.6 120.5 6.7 18.0 3.0 . . . . . . . . . . STATI0tl -- LAG 0008 2 0 12.3 11.8 109.7 6.7 12.0 3.0 . . . . . . . . . . I 12.3 12.0 111.6 . . . . . . . . . . . . . 2 12.2 12.0 111.3 . . . . . . . . . . . . . 3 12.0 12.1 111.8 . . . . . . . . . . . . . 4 11.8 12.1 111.3 . . . . . . . . . . . . . 5 10.8 12.1 108.8 . . . . . . . . . . . . . 6 8.7 12.2 104.4 6.3 13.0 2.8 . . . . . . . . . . 7 7.5 12.2 101.5 . . . . . . . . . . . . . 8 7.3 11.6 96.0 . . . . . . . . . . . . . 9 7.1 11.6 95.5 . . . . . . . . . . . . . 10 7.0 11.7 96.1 6.5 14.0 2.4 . . . . . . . . . . ~[ 11 6.9 11.7 95.9 . . . . . . . . . . . . . 4
1 AOLE 3- 7. HATER QUALITY DATA COLLECTED FRON LAKE AfMA AfD THE HASTE HEAT TREATHEt4T FACILITY (LAG 0004SI DUR1tG FEDRUARY. 1981. DEPTH TEMPER- DISSOLVED PERCElli . PH ALKAL- TURB- Ml3 H03_H 0-PO4 H_PO4 T_PO4 $04 CU
- FE 'PB Zia ATURE OXYGEtt SATURAT10tl IlllTY IDITY NG/L t1G/L t1G/L t1G/L t1G/L tG/L tG/L tG/L t1G/L tG/L C t1G/L 11G/L tiTU CACO 3 STATIOtt -- LAG 00ti 3 0 10.3 11.6 103.1 6.7 15.0 3.4 . . . . . . . . . .
I 10.3 11.6 103.1 . . . . . . . . . . . . . 2 10.3 11.6 103.1 . . . . . . . . . . . . . 3 10.3 11.6 103.1 . . . . . . . . . . . . . 4 10.3 11.6 103.1 . . . . . . . . . . . . . 5 10.2 11.7 103.7 6.8 12.0 3.2 . . . . . . . . . . 6 10.1 11.7 103.5 . . . . . . . . . . . . . 7 9.8 11.7 102.8 . . . . . . . . . . . . . 8 8.7 11.8 101.0 . . . . . . . . . . . . .
'9 8.6 11.8 100.8 . . . . . . . . . . . . .
10 8.3 11.7 99.2 6.7 13.0 4.0 . . . . . . . . . . a STATI0tl -- ELK CREEK - 0 0 0 12.0 12.0 110.8 6.7 14.0 3.3 . . . . . . . . . . I 11.9 12.0 110.6 . . . . . . . . . . . . . 2 11.9 12.0 110.6 . . . . . . . . . . . . . 3 11.8 12.0 110.3 . . . . . . . . . . . . . 4 10.3 11.8 104.9 6.8 13.0 3.2 . . . . . . . . . . 5 8.2 12.0 101.5 . . . . . . . . . . . . . 6 7.8 12.0 100.5 . . . . . . . . . . . . . 7 7.3 12.0 99.3 . . . . . . . . . . . . . 8 7.3 12.0 99.3 6.7 12.0 3.8 . . . . . . . . . . 9 7.2 12.0 99.1 . . . . . . . . . . . . . STATI0tl -- t1ILLPatID CREEK 4 i 0 11.1 12.0 108.6 6.7 14.0 3.3 . . . . . . . . . . I 11.1 12.1 109.5 . . . . . . . . . . . . . 2 11.0 12.1 109.3 . . . . ,. . . . . . . . . 3 10.4 12.0 106.9 . . . . . . . . . . . . . 4 9.1 12.0 103.7 . . . . . . . . . . . . . 5 0.2 12.2 103.2 6.9 14.0 3.2 . . . . . . . . . . 6 7.5 12.2 101.5 . . . . . . . . . . . . . 7 7.1 12.2 100.5 . . . . . . . . . . . . . 8 6.8 12.2 99.7 . . . . . . . . . . . . . 9 6.5 12.1 98.2 . . . . . . . . . . . . 10 6.4 12.1 97.9 6.8 14.0 3.8 . . . . . . ,. . . . i
TABLE 3- 8. HATER QUALITY DATA COLLECTED FRON LAKE A181A AllD THE HASTE HEAT TREATHEtIT FACILITY (LAG 00HS) DURItG F1 ARCH. 1981. DEP1H T Et1PE ft- 01SSOLVED PERCENT PH ALKAL- TURB- tall H03_H 0-PO4 N_PO4 T_PO4 504 CU FE PB 214 ATURE OX1GEH SATURATI0tl IllITY IDITY IG/L f1G/L t1G/L tG/L tG/L t1G/L tlG/L F1G/L tG/L NG/L C t1G/L ttG/L I4TU CACO 3 STATIDt1 -- DAN 0 8.7 10.9 93.3 6.8 12.0 4.8 0.0 0.58 0.03 0.24 0.27 9.2 0.00 0.10 0.00 0.01 1 8.7 10.9 93.3 . . . . . . . . . . . . . 2 8.7 10.9 93.3 . . . . . . . . . . . . . ! 3 8.7 10.8 92.5 . . . . . . . . . . . . . 4 8.7 10.9 93.3 . . . . . . . . . . . . . 5 8.7 11.0 94.2 . . . . . . . . . . . . . 6 8.5 11.0 91.7 . . . . . . . . . . . . . 7 8.5 11.0 93.7 . . . . . . . . . . . . . - 8 8.5 11.0 93.7 7.0 14.0 4.6 0.0 0.58 0.03 0.24 0.27 9.2 0.00 0.10 0.00 0.01 9 8.4 11.0 93.5 . . . . . . . . . . . . . 10 8.4 11.0 93.5 . . . . . . . . . . . . . 11 8.4 10.9 92.6 . 12 8.4 10.9 92.6 . . . . . . . . . . . . . 13 8.4 10.9 92.6 . . . . . . . . . . . . . , 14 8.4 10.9 92.6 . . . . . . . . . . . . . 15 8.4 10.9 92.6 . . . . . . . . . . . . . 16 8'4
. 10.8 91.8 6.9 17.0 5.2 0.0 0.35 0.14 M 0.09 9.0 0.00 0.14 0.00 0.01 17 8.3 10.8 91.6 . . . . . . . . . . . . .
18 8.1 10.8 91.1 . . . . . . . . . . . . . STATI0tl -- 1HTAKE O 7.3 11.6 96.0 6.7 14.0 3.4 0.0 0.52 0.02 0.04 0.06 10.2 0.01 0.05 0.00 0.02 - 1 7.3 11.6 96.0 . . . . . . . . . . . . . 2 7.3 11.5 95.2 . . . . . . . . . . . . . 3 7.3 11.5 95.2 . . . . . . . . . . . . . 4 7.3 11.5 95.2 . . . . . . . . . . . . . 5 7.3 11.5 95.2 6.6 13.0 3.5 0.0 0.62 0.02 0.07 0.09 9.0 0.01 0.14 0.00 0.01 6 7.3 11.5 95.2 . . . . . . . . . . . . . 7 7.3 11.4 94.3 . . . . . . . . . . . . . 8 7.2 11.4 94.1 . . . . . . . . . . . . . 9 7.2 11.4 94.1 . . . . . . . . . . . . . 10 7.2 11.4 94.1 6.8 14.0 3.6 0.0 0.58 0.03 0.14 0.17 9.0 0.04 0.09 0.00 0.01 11 7.2 11.4 94.1 . . . . . . . . . . . . . m. m o
e TABLE 3- 8. HATER QUALITT DATA COLLECTED FROM LAKE AtalA Ato THE HASTE HEAT TFEATHEt4T FACILITT (LAGOONSI OtR!tG MARCH, 1981. DEPTH T EttPE R- DISSOLVED PERCENT PH ALKAL- TURB- tal3 NO3_H 0-PO4 N_PO4 T_PO4 SO4 CU FE PS 774 ATURE OX1CEH SATURATION IllITf IDITY ttG/L P1G/L F1G/L tG/L- MG/L t1G/L NG/L ttG/L PL/L F1G/L C t1G/L FIG /L tiTU g CACO 3 STATION -- RT 206 BRIDGE O 6.8 11.9 97.3 6.7 14.0 4.0 . . . . . . 0.01 0.08 0.00 . 1 6.8 11.9 97.3 . . . . . . . . . . . . . 2 6.8 11.9 97.3 . . . . . . . . . . . . . 3 6.8 11.9 97.3 . . . . . . . . . . . . . 4 6.8 11.9 97.3 . . . . . . . . . . . . . 5 6.8 11.9 97.3 6.6 13.0 4.4 . . . . . . 0.01 0.34 0.00 0.02 6 6.8 11.8 96.5 . . . . . . . . . . . . . 7 6.8 11.8 96.5 . . . . . . . . . . . . . 8 6.8 11.8 96.5 . . . . . . . . . . . . . 9 6.8 11.8 96.5 . . . . . . . . . . . . . 10 6.8 11.8 96.5 6.6 15.0 4.6 . . . . . . 0.01 0.14 0.00 0.03 11 6.8 11.8 96.5 . . . . . . . . . . . . . .h STAT 10tl -- NORTH At44A ARtt 0 7.3 12.2 101.0 6.8 18.0 9.5 0.0 0.37 0.04 0.31 0.35 7.0 0.01 0.13 0.00 . 1 7.3 12.2 101.0 . . . . . . . . . . . . . 2 7.3 12.2 101.0 . . . . . . . . . . . . . 3 7.3 12.3 101.8 6.7 19.0 10.0 0.0 0.11 0.02 0.22 0.24 7.2 0.01 0.13 0.00 0.02 4 7.3 12.2 101.0 . . . . . . . . . . . . . 5 7.3 12.2 101.0 . . . . . . . . . . . . . 6 7.3 12.2 101.0 7.1 18.0 9.8 0.0 0.21 0.07 0.17 0.24 7.0 0.00 0.16 0.00 0.01 7 7.3 11.2 92.7 . . . . . . . . . . . . . 5 TAT 1014 -- PANUta(ET ARtt 0 7.2 11.6 95.8 6.7 15.0 9.4 0.0 0 46 0.03 0.26 0.29 8.9 0.01 0.22 0.00 . 1 7.1 11.2 92.2 . . . . . . . . . . . . . 2 7.0 11.2 92.0 . . . . . . . . . . . . . 3 6.9 11.1 91.0 6.7 14.0 10.0 0.0 0.34 0.04 0.26 0.30 8.7 0.01 0.14 0.00 0.01 4 6.9 11.0 90.1 . . . . . . . . . . . . . 5 6.8 11.0 89.9 . . . . . . . . . . . . . 6 6.7 11.0 89.7 6.7 17.0 10.3 0.0 0.45 0.06 0.29 0.35 6.9 0.00 0.15 0.01 0.01 7 6.7 11.0 83.7 . . . . . . . . . . . . . m
TABLE 3- 8. HATER QUALITY DATA COLLECTED FR0rt LAKE Al04A AND THE WASTE HEAT TREATitEllT FACILITY E LAGOOHS) DURIt4G F1 ARCH. 1981. DEPTH TEt1PER- DISSOLVED PERCENT PH ALKAL- TURB- NH3 NO3J4 0-PO4 H_PO4 T_PO4 504 CU FE PB Zta A1URE OXVGEN SATURATION IHITY IDITY F1G/L 81G/L NG/L F1G/L t1G/L NG/L MG/L NG/L tWL MG/L C (1G/L NG/L HIU CACO 3 STATION -- CONTRARY CREEK BAY 0 7.4 11.7 97.1 6.5 9.0 2.7 . . . . . . . . . . 1 7.4 11.7 97.1 . . . . . . . . . . . . . 2 7.4 11.7 97.1 . . . . . . . . . . . . . 3 7.3 11.6 96.0 . . . . . . . . . . . . . 4 7.3 11.6 96.0 6.5 9.0 3.0 . . . . . . . . . . 5 7.3 11.6 96.0 . . . . . . . . . . . . . 6 7.3 11.6 96.0 . . . . . . . . . . . . . 7 7.1 11.5 . 94.7 6.6 8.0 2.6 . . . . . . . . . . 8 7.0 11.5 94.5 . . . . . . . . . . . . . STATION -- CONTRARY CREEK DRI i 1 0 7.2 11.7 96.6 6.2 4.0 2.4 . . . . . . 0.10 0.20 0.00 0.31 'd 1 7.2 11.6 95.8 . . . . . . . . . . . . . 2 7.2 11.6 95.8 . . . . . . . . . . . . . 3 7.2 11.6 95.8 6.4 5.0 2.3 . . . . . . 0.09 0.24 0.00 0.34 4 7.2 11.6 95.8 . . . . . . . . . . . . . 5 7.1 11.6 95.5 . . . . . . . . . . . . . 6 7.1 11.2 92.2 6.4 3.0 2.4 . . . . . . 0.10 0.26 0.00 0.37 STATION -- LAGOOH 1 0 15.4 10.6 105.3 6.7 14.0 3.4 0.0 0.68 0.03 0.05 0.08 10.7 0.01 0.14 0.00 , 1 15.4 10.6 105.3 . . . . . . . . . . . . . 2 15.4 10.6 105.3 . . . . . . . . . . . . . 3 15.4 10.6 105.3 . . . . . . . . . . . . . 4 15.4 10.6 105.3 6.8 13.0 2.9 0.0 0.00 0.05 0.07 0.12 10.3 0.01 0.10 0.00 0.01 5 15.4 10.6 105.3 . . . . . . . . . . . . . 6 15.2 10.5 103.9 . . . . . . . . . . . . . 7 14,9 10.4 102.3 . . . . . . . . . . . . . 8 14.9 10.4 102.3 6.9 14.0 4.3 0.0 0.61 0.02 0.06 0.08 11.0 0.01 0.15 0.00 .
TABLE 3- 8. HATER QUALITY DATA COLLECTED FR0t1 LAKE ATRIA AfD THE WASTE HEAT TREATMENT FACILITY (LAGO0t45) DURIHG MARCH, 1981. DEPTH T Et1PER- DISSOLVED PERCENT PH ALKAL- TURB- tal3 NO3,H 0-PO4 it_PO4 T_PO4 SO4 CU FE PB ZN ATURE OXYGEl4 SATURATI0tt IHITY IDITY NG/L t1G/L NG/L NG/L NG/L MG/L NG/L NG/L MG/L t*G/L C NG/L MG/L HTU CACO 3 STATI0t3 -- LAGOOH 2 0 11.2 10.0 90.7 6.7 13.0 3.5 . . . . . . . . . . I 11.2 10.0 90.7 . . . . . . . . . . . . .
*2 11.2 10.0 90.7 . . . . . . . . . . . . .
3 11.2 10.0 90.7 . . . . . . . . . . . . . . 4 11.2 10.0 90.7 . . . . . . . . . . . . . 5 11.2 10.0 90.7 6.6 13.0 3.7 . . . . . . . . . . 6 11.1 10.0 90.5 . . . . . . . . . . . . . 7 11.1 9.9 89.6 . . . . . . . . . . . . . 8 10.9 9.9 89.2 . . . . . . . . . . . . . 9 10.5 9.8 87.5 . . . . . . . . . . . s. . 10 10.3 9.7 26.2 6.8 14.0 4.0 . . . . . . . . . . 11 10.1 9.6 84.9 . . . . . . . . . . . . . JL STATIDH -- LAGOON 3 e s 0 9.7 9.8 85.9 6.6 14.0 4.4 0.0 0.77 0.02 0.14 0.16 10.3 0.00 0.13 0.00 . 1 9.8 9.9 87.0 . . . . . . . . . . . . . 2 9.8 9.9 87.0 . . . . . . . . . . . . . 3 9.8 9.9 87.0 . . . . . . . . . . . . . 4 9.8 9.9 87.0 . . . . . . . . . . . . . 5 9.8 9.9 87.0 6.7 13.0 4.7 0.0 0.47 0.02 0.10 0.12 8.0 0.01 0.09 0.00 0.02 6 9.8 9.9 87.0 . . . . . . . . . . . . . 7 9.7 9.9 86.8 . . . . . . . . . . . . . 8 9.7 9.9 86.8 . . . . . . . . . . . . . 9 9.6 9.9 86.6 . . . . . . . . . . . . . 10 9.5 9.9 26.4 6.7 13.0 5.0 0.0 0.69 0.02 0.14 0.16 10.3 0.01 0.11 0.00 0.03 11 9.4 9.8 85.3 . . . . . . . . . . . . . STATIDH -- ELK CREEK 0 11.2 10.2 92.5 6.8 13.0 3.0 . . . . . . . . . . A 1 11.2 10.2 92.5 . . . . . . . . . . . . . 2 11.2 10.2 92.5 . . . . . . . . . . . . . 3 11.1 10.2 92.3 . . . . . . . . . . . . . 4 10.2 10.3 91.3 6.6 14.0 3.4 . . . . . . . . . . 5 8.8 10.4 89.2 . . . . . . . . . . . . .
- 6 8.4 10.6 90.1 . . . . . . . . . . . . .
7 8.3 10.6 89.9 6.7 14.0 3.2 . . . . . . . . . .
,8 8.3 10.6* 89.9 . . . . . . . . . ,. ., . .
i TABLE 3- 8. WATER QUALITY DATA COLLir?% FRott LAKE Al#4A Ate THE WASTE HEAT 1REATHENT FACILITY ILAG00H5) DUR1ts itARCH. 1981. ] DLPTH 1[NPER- DISSOLVED PERCENT PH ALKAL- TURB- 9013 HO 3,H 0-PO4 H_PO4 T_PO4 504 CU FE PS 2H ATURE OX1GEff SATURATION IHITT 10!T'4 PG/L ttG/L NG/L NG/P PG/L 81G/L FG/L NG/L NG/L PG/L C IE/L F1G/L HTU CACO 3 STATION -- itILLP005 CREEK 0 10.1 10.2 90.2 6.8 14.0 3.6 . . . . . . . . . . I 10.1 10.2 90.2 . . . . . . . . . . . . . 2 10.1 10.2 90.2 . . . . . . . . . . . . .
- 3 10.1 10.2 90.2 . . . . . . . . . . . . .
4 10.1 10.2 90.2 . . . . . . . . . . . . . 5 10.1 10.2 90.2 6.7 14.0 3.6 . . . . . . . . . . 6 10.1 10.2 90.2 . . 7 16.0 10.2 90.0 . . . . . . . . 8 9.8 10.1 88.7 . . . . . . . . . . . . . 9 9.0 10.1 87.1 6.7 14.0 3.8 . . . . . . . . . . 10 9.0 10.1 87.1 . . . . . . . . . . . . .
.s.
W N s i ( l 4 e M e
= @
=
h
- - = '
v s
-. . ~ .
b i
,u
. TABLE 3 9. WATER QUALITY DATA COLLECTED FRott LAKE At#4A Atc THE 64ASTE HEAT TREAir1ENT F ACILITY E LAGOONSB DURING APRIL. 1981.
DEPTH T EttPER- DISSOLVED P[RCENT PH ALKAL- TURG- Bel 3 NO3_N O'-PO4 11_PO4 T_PO4 504 CU FE P8 Zla i A1URE GXYGLt3 SATtRATI004
- INITY IDITT t1G/L t1G/L 81G/L t1G/L t1G/L ttG/L 81G/L 31G/L t1G/L FIG /L .
C- t*G/L t1G/L HTu ! s CACO 3 F
\
STATION -- DAtt 0 16.4 9.4 95.4 6.9 12.0 4.2 . . . . . . . . . . 1 16.4 9.5 96.4 . . . . . . . . . . . . . 2 16.4 9.5 96.4 . . . . . . . . . . . . . . 3 16.4- ~ 9.5 96.4 . . . . . . . . . . . . . 4 16.1 9.5 %.2 . . . . . . . . . . . . . 5 16.3' 9.5 96.2 . . . . . . . . . . . . . $ 6 16.2 9.5 96.0 . . . . . . . . . . . . . 7 15.3 9.5 94.2 . . . . . . . . . . . . . 8 15.2 9.6 95.0 7.1 14.0 3.7 . . . . . . . . . . 4 9 14.9 9.6 94.4 . . . . . . . . . . . . . 10 14.7 9.6 94.0 . . . . . . . . . . . . . 8
- 11 14.4 9.6 93.4 . . . . . . . . . . . . .
12 14.1 9.6 92.8 . . . . . . . . . . . . . -= 13 14 12.8 12.2 9.6 9.2 90.3 85.4 f 15 12.0 9.0 85.1 . . . . . . . . . . . . . 16 31.6 9.0 82.4 . . . . . . . . . . . . . 17 10.9 8.7 78.4 6.9 14.0 3.6 . . . . . . . . . . 18 10.9 8.3 74.8 . . . . . . . . . . . . STATION -- It4TAKE O 15.4 9.8 97.4 7.1 12.0 2.3 . . . . . . . . . . I 15.4 9.8 97.4 . . . . . . . . . . . . . 97,2 % 2 15.3 9.8 . . . . . . . . . . . . . 3 15.3 9.8 97.2 . . . . . . . . . . . . . 4 15.3 9.8 97.2 . . . . . . . . . . . . . 5 15.3 9.8 97.2 7.4 13.0 2.8 . . . . . . . . . . 6 35.3 9.7 96.2 . . . . . . . . . . . . . 7 15.3 9.7 96.2 . . . . . . . . . . . . . 8 14.7 9.7 95.0 . . . . . . . . . . . . . 9 14.3 9.5 92.3 . . . . . . . . . . . . . 10 13.9 9.3 89.5 . . . . . . . . . . . . . 11 13.1 8.9 84.2 7.0 13.0 2.8 . . . . . . . . . . ) l I
APRIL, 1981. TABLE 3- 9. WATER QUALITY DATA COLLECTED FROM LAKE AletA Ate THE WASTE HEAT TREATt1ENT FACILITY E LAGOOH5) DURING ALKAL- TUR8- tet3 HO3_N 0-PO4 ft_PO4 T_PO4 504 CU FE PS ZN DEPTH IEt1PER- DISSOLVED PERCENT PH ATURE OX1 GEN SATURATION IllIT Y - IDITY t1G/L 81G/L t1G/L t1G/L t1G/L F1G/L t1G/L tWL t1G/L 81G/L C FIG /L 81G/L HiU CACO 3 STATION -- RT 208 BRIDGE O 15.1 9.8 96.8 6.9 14.0 3.6 . . . . . . . . .
. . . . . . . l I 15.1 9.9 97.8 . . . . . .
2 15.1 10.0 93.8 . . . . . . . . 3 15.1 10.0 98.8 . . . . . . . . 4 15.1 9.8 96.8 . . . . . . . . . . 5 14.9 9.8 96.4 7.0 13.0 5.2 . . . . . . . . . . 6 14.7 9.8 96.0 . . . . . . 7 14.4 9.8 95.4 . . . . . . . 8 14.1 9.8 94.8 . . . . . . . 9 13.5 9.4 89.7 . . . . . . . . . . . 10 13.0 8.8 83.1 . . . . . . . . . . 11 12.8 8.2 77.1 6.9 13.0 4.0 . . . . . . . . . . 1 12 12.4 6.4 59.6 . . . . . . . . . N e STATIDH -- NOR TH At44A ARM 0 16.7 10.2 104.1 7.1 18.0 7.2 . . . . . . . . . . 1 16.7 10.3 105.1 . . . . . . . . . . 2 16.2 10.4 105.1 . . . . . . . . . 3 15.1 10.2 100.7 7.2 17.0 7.6 . . . . . . . . . 4 14.3 10.0 97.1 . . . . . . . . . . . 5 13.9 7.6 71.2 . . . . . . . . . . . 6 11.8 6.8 65.3 . . . . . . . 7 13.8 6.8 65.3 6.9 18.0 9.0 . . . . . . ST ATIDH -- pat 1UPEEY ARM 0 15.7 10.6 106.0 7.3 17.0 6.9 . . . . . . . . . 1 15.6 10.7 106.8 . . . . . . . . . 2 15.2 10.4 102.9 . . . . . . . . . . . 3 15.1 9.5 93.8 7.3 15.0 6.4 . . . . . 4 14.6 9.4 91.9 . . . . . . .
- 5 14.2 9.0 87.2 . . . . . . . .
6 11.8 7.5 72.1 . . . . . . . . . . 7 13.4 4.6 41.8 7.0 17.0 7.2 . . . . . . . . . .
T ABEE 3- 9. HATER QUALITY DATA COLLEClED FR0t1 LAKE At#4A Ate THE 84ASTE HEAT TREATHENT F ACILITY (LAGOONSI DUR1HG APRIL, 1931. DEPTH TEMPER- DISSOLVED PERCEt(T Rt ALKAL- TURB- tit 3 HO3_N 0-PO4 21_PO4 T_PO4 504 CU FE PB 214 ATURE DXfGEli SATURATIDH INITY IDITY t1G/L NG/L t1G/L F1G/L NG/L F1G/L F1G/L tG/L NG/L ttG/L C ttG/L t1G/L HTU CACO 3 STAT 10tt -- CONTRARY CREEK BAY 0 15.9 9.5 95.4 6.9 11.0 2.6 . . . . . . . . . . 1 15.9 9.6 96.4 . . . . . . . . . . . . . 2 15.9 9.7 97.4 . . . . . . . . . . . . . 3 15.7 9.7 97.0 . . . . . . . . . . . . . 4 15.1 9.7 95.8 7.0 12.0 2.4 . . . . . . . . . . 5 14.8 9.7 95.2 . . . . . . . . . . . . . 6 14.8 9.7 95.2 . . . . . . . . . . . . . 7 14.7 9.6 94.0 . . . . . . . . . . . . . 8 14.2 8.5 82.4 6.7 10.0 1.8 . . . . . . . . . . . STATICH -- CONTRARY CREEK BRI 9 0 15.7 9.5 95.0 6.7 9.0 2.2 . . . . . . . . . . I 15.7 9.5 95.0 . . . . . . . . . . . . . 2 15.7 9.5 95.0 . . . . . . . . . . . . . 3 15.7 9.5 95.0 6.8 8.0 2.7 . . . . . . . . . . 4 15.7 9.5 95.0 . . . . . . . . . . . . . 5 15.2 9.4 93.0 . . . . . . . . . . . . . 6 14.8 9.3 91.3 . * . . . . . . . . . . . . 7 14.2 9.2 39.2 7.0 6.0 2.6 . . . . . . . . . . STATI0t4 -- LAC 00t3 1 0 21.5 9.7 108.7 7.2 13.0 4.4 . . . . . . . . . . 1 21.5 9.7 108.7 . . . . . . . . . . . . . 2 21.5 9.7 108.7 . . . . . . . . . . . . . 3 21.5 9.7 108.7 . . . . . . . . . . . . . 4 21.5 9.7 108.7 7.3 15.0 3.2 . . . . . . . . . . 5 21.5 9.7 108.7 . . . . . . . . . . . . . 6 21.5 9.7 108.7 . . . . . . . . . . . . . 7 21.5 9.7 103.7 . . . . . . . . . . . . . 8 21.5 9.7 103.7 7.3 13.0 3.2 . . . . . . . . . . M e e I
TABLE 3- 9. WATER QUALITY DATA COLLECTED FRon LAKE AltlA Ate THE WASTE HEAT TREATttENT FACILITY (LAGOONS) DURING APRIt, 1961. DEP1H lEHPER- DISSOLVED PERCENT PH ALKAL- TURB- tet3 H03_H 0-PG4 H_PO4 T PO4 504 CU FE PB ZN AIURE OXfCEH SATURATICH IHITV IDITY FIG / L, p/L t1G/L t1G/L t1G/L t.1G/L tG/L - FIG /L ttG/L tG/L C ttG/L . ttG/L HITJ CACO 3 STATION -- LAGOOH 2 O 20.4 9.3 102.1 7.2 12.0 2.9 . . . . . . . . . . 1 20.4 9.2 101.0 . . . . . . . . . . . . . 2 20.4 9.1 99.9 . . . . . . . . . . . . . 3 20.4 9.1 99.9 . . . . . . . . . . . . . 4 F0.4 9.1 99.9 . . . . . . . . . . . . . 5 20.3 9.1 99.7 . . . . . . . . . . . . . 6 17.5 8.9 92.3 7.2 13.0 3.6 . . . . . . . . . . 7 17.2 8.8 90.7 . . . . . . . . . . . . . 8 17.2 8.9 91.8 . . . . . . . . . . . . . 9 16.8 8.8 90.0 . . . . . . . . . . . . . 10 16.6 8.9 90.7 . . . . . . . . . . . . . 11 16.4 8.8 89.3 7.4 14.0 3.7 . . . . . . . . . . e STATION -- LAGOOld 3 W e 0 19.1 9.1 97.4 7.1 13.0 3.5 . . . . . . . . . . 1 19.1 9.0 96.3 . . . . . . . . . . . . . 2 19.1 9.0 96.3 . . . . . . . . . . . . . 3 19.1 9.0 96.3 . . . . . . . . . . . . . 4 19.1 9.0 96.3 . . . . . . . . . . . . . 5 19.1 8.7 93.1 . . . . . . . . . . . . . 6 19.1 8.7 93.1 7.2 14.0 3.5 . . . . . . . . . . 7 19.0 8.6 91.9 . . . . . . . . . . . . . 8 18.3 8.6 90.6 . . . . . . . . . . . . . 9 17.7 8.8 91.6 . . . . . . . . . . . . . 10 17.5 8.8 91.3 . . . . . . . . . . . . . 11 17.4 8.8 91.1 7.2 13.0 4.4 . . . . . . . . . .
- STATION -- ELK CREEK 0 20.1 9.1 99.3 7.0 14.0 3.3 . . . . . . . . . .
1 20.1 9.1 99.3 . . . . . . . . . . . . . 2 20.1 9.2 100.4 . . . . . . . . . . . . . 3 20.1 9.1 99.3 . . . . . . . . . . . . . 4 18.4 9.0 95.0 7.5 14.0 3.2 . . . . . . . . . . _ 5 17.3 9.0 93.9 . . . . . . . . . . . . .
-. 6 17.5 9.1 94.4 . . . . . . . . . . . . .
7 17.4 9.1 9'.2
+ . . . . . . . . . . . . .
8 17.2 9.1 93.8 7.1 14.0 5.5 . . . . . . . . . . I
. . _ . . , . ._ _ _ m _.. _. . ____ _ _ ___
TABLE 3 9. HATER QUALITY DATA COLLECTED FROM LAKE A>04A Ate THE HASTE HEAT TREAll1EtiT FACILITY (LAG 00H53 DURIfG APRIL. 1981. DEPTH TEtirER- DISSOLVED PERCENT PH ALKAL- TURB- Mt3 HO3_H 0-PO4 H_PO4 T_PO4 504 CU FE 08 2 74 l ATURE OXYCEtt SATURATION INITY IDITY NG/L 11G/L t1G/L 81G/L t1G/L t1G/L 81G/L t1G/L F1G/L PC/L C 21G/L t13/L HTU CACO 3 .l STATION -- MILLFole CREEK 0 19.0 9.4 100.4 7.0 13.0 3.4 . . . . . . . . . . 1 19.1 9.4 100.6 . . . . . . . . . . . . . 2 19.1 9.3 99.6 . . . . . . . . . . . . . 3 19.1 9.2 98.5 . . . . . . . . . . . . . 4 19.1 9.2 98.5 . . . . . . . . . . . . . 5 19.1 9.2 93.5 7.2 14.0 3.9 . . . . . . . . . . 6 18.9 9.2 98.1 . . . . . . . . . . . . . 7 18.7 9.2 97.7 . . . . . . . . . . . . . 8 13.6 9.1 96.5 . . . . . . . . . . . . . 9 13.6 9.1 96.5 . . . . . . . . . . . . . 10 18.6 9.1 %.5 7.1 13.0 5.6 . . . . . . . . . . e w N O e e 1
*k w
e I
, =
i TAOLE 3-10. HATER QUALITY DATA COLLECTED FROM LAKE AfDIA AfD THE WASTE HEAT TREATF1ENT FACILITY ILAGOONSI DURING t1AY. 1981. DEPTH TE ttPE R- DISSOLVED PERCENT PH ALKAL- TURS- 8013 HO3_N 0-PO4 t1_PO4 T_PO4 504 CU FE PS ZH ATURE OXYGEN SATURATION THITY IDITY t1G/L t1G/L t1G/L t1G/L t1G/L t1G/L t1G/L F1G/L t1G/L t',G/ L C f1G/L NG/L HTU
, CACO 3 ST ATIDH -- D AN O 19.2 8.2 87.9 6.9 11.0 4.6 . . . . . . . . . .
I 19.2 8.0 85.8 . . . . . . . . . . . . . 2 19.2 8.0 85.8 . . . . . . . . . . . . . 3 19.2 8.0 25.8 . . . . . . . . . . . . . 4 19.1 7.9 84.6 . . . . . . . . . . . . . 5 19.1 7.9 84.6 . . . . . . . . . . . . . 6 19.1 7.9 84.6 . . . . . . . . . . . . . 7 19.1 7.9 84.6 . . . . . . . . . . . . . 8 19.1 7.8 83.5 . . . . r . . . . . . . . 9 19.1 7.8 83.5 6.7 9.5 5.0 . . . . . . . . . . 10 19.0 7.7 82.3 . . . . . . . . . . . . . 11 18.8 7.6 80.9 . . . . . . . . . . . . . 2. 12 18.7 1. 5 79.7 . . . . . . . . . . . . . ro 13 18.2 7.2 75.7 . . . . . . . . . . . . .
}'
14 16.3 5.5 55.7 . . . . . . . . . . . . . 15 15.8 5.2 52.1 . . . . . . . . . . . . . 16 15.6 5.0 49.9 . . . . . . . . . . . . . 17 15.3 5.0 49.6 6.8 12.8 5.6 . . . . . . . . . . ST ATIDH -- IHTAKE
- 0 18.8 8.2 87.3 7.0 11.2 3.2 . . . . . . . . . .
I 18.8 8.1 86.2 . . . . . . . . . . . . . 2 18.8 8.1 86.2 . . . . . . . . . . . . . 3 18.7 8.1 86.0 . . . . . . . . . . . . . 4 18.7 8.1 86.0 . . . . . . . . . . . . . 5 18.7 8.1 86.0 . . . . . . . . . . . . . 6 18.6 8.0 84.8 6.9 11.5 3.8 . . . . . . . . . . 7 18.5 7.9 83.6 . . . . . . . . . . . . . 8 10.4 7.9 83.4 . . . . . . . . . . . . . 9 18.3 7.9 85.3 . . . . . . . . . . . . . 10 17.8 6.1 63.7 . . . . . . . . . . . . . 11 17.4 5.9 61.1 7.0 12.2 4.8 . . . . . . . . . . W
TABLE 3-10. HATER QUALITY DATA COLLECTED FROM LAKE Af81A Ate THE WASTE HEAT TREATt1ENT FACILITY (LAGOONS) DURING .MAY, 1981. DEPTH T Et1PER- DISSOLVED PERCENT Mt ALKAL- TUR8- #84 3 H03_H 0-PO4 P1_PO4 T_PO4 504 CU FE PB ZH AIURE OXfGEN SATURATION IHITY IDITY NG/L FIG /L I1G/L t1G/L F1G/L FIG /L #1G/L FIG /L PC/L #C/L C t1G/L NG/L HTU CACO 3 STATIDH -- RT 208 BRIDGE
^
0 18.8 8.4 89.4 6.9 12.5 4.8 . . . . . . . . . . 1 18.7 8.4 89.2 . . . . . . . . . . . . . 2 18.7 8.3 8S.2 . . . . . . . . . . . . . 3 18.5 8.3 87.8 . . . . . . . . . . . . . 4 18.5 8.2 86.8 . . . . . . . . . . . . . 5 18.5 8.1 85.7 . . . . . . . . . . . . . 6 18.5 8.1 85.7 6.9 12.2 4.4 . . . . . . . . . . 7 18.5 8.0 . 84.6 . . . . . . . . . . . . . j 8 18.4 7.4 78.1 . . . . . . . . . . . . . , 9 18.1 6.3 66.1 . . . . . . . . . . . . . I 10 17.7 5.7 59.4 . . . . . . . . . . . . . l 11 17.4 5.3 54.9 6.9 13.5 6.8 . . . . . . to STATION -- NORTH At#4A ARM 7 0 18.7 7.3 77.5 7.1 25.8 8.4 . . . . . . . . . . 1 18.6 7.3 77.4 . . . . . . . . . . . . . 2 18.5 7.3 77.2 . . . . . . . . . . . . . 3 18.4 7.2 76.0 7.1 18.4 7.8 . . . . . . . . . . 4 18.3 7.1 74.8 . . . . . . . . . . . . . 5 18.1 6.7 70.3 . . . . . . . . . . . . . 6 18.0 6.7 70.2 7.0 17.5 6.0 . . . . . . . . . . STATION -- pat 1UHKEY ARN 0 18.6 6.7 71.0 7.3 17.7 7.9 . . . . . . . . . . I 18.4 6.6 69.7 . . . . . . . . . . . . . 2 18.1 6.5 68.2 . . . . . . . . . . . . . 3 18.1 6.2 65.1 . . . . . . . . . . . . . 4 18.1 6.2 65.1 7.1 17.2 9.0 . . . . . . . . . . 5 10.0 5.0 52.4 . . . . . . . . . . . . . 6 17.7 2.6 27.1 . . . . . . . . . . . . . 7 17.6 1.5 15.6 7.0 18.0 12.0 . . . . . . . . . . M
TA8tf 3-10. WATER QUALITY DATA COLLECTED FRott LAKE AtalA Ate THE WASTE HEAT 1REATitENT FACILITY (LAG 00tts) DUR1tG ttAT, 1981. DEPTH TEttPE R- DI5 SOLVED PERCENT PH ALKAL- TURB- Pet 3 NO3_N 0-PO4 ft_PO4 T_PO4 504 CU FE PB 7H ATURE OXfGEN SATURATION IHITY IDITY IG/L NG/L NG/L ttG/L ttG/L tG/L PC/L tG/L tG/L tG/L C tG/L tG/L H1U
, CACO 3 STATION -- CONTRARY CREEK BAf 0 19.1 8.3 88.8 6.8 10.2 3.2 . . . . . . . . . .
1 19.1 8. 2 - 87.8 . . . . . . . . . . . . . 2 18.8 8.2 87.3 . . . . . . . . . . . . . 3 18.7 8.1 86.0 . . . . . . . . . . . . . 4 18.7 8.1 86.0 6.7 8.5 3.8 . . . . . . . . . . 5 18.5 7.9 83.6 . . . . . . . . . . . . . 6 18.5 7.9 83.6 . . . . . . . . . . . . . 7 18.4 7.8 82.4 . . . . . . . . . . . . . 8 17.9 7.6 79.5 6.8 9.7 3.8 . . . . . . . . . . STATION -- C0tiTRARY CREEK BRI
.e N
kmA 0 18.9 8.4 89.6 6.9 9.3 4.4 . . . . . . . . . . a 1 18.9 8.4 89.6 . . . . . . . . . . . . . 2 18.8 8.4 89.4 . . . . . . . . . . . . . 3 18.5 8.4 83.9 . . . . . . . . . . . . . 4 18.0 8.3 87.0 6.9 7.8 3.8 . . . . . . . . . . 5 16.8 7.6 77.7 . . . . . . . . . . . . . 6 16.6 7.5 76.4 . . . . . . . . . . . . . 7 16.5 7.5 76.2 6.3 4.5 8.2 . . . . . . . . . . STATI0tt -- LAGOOH 1 e 0 26.9 7.9 97.8 7.0 12.4 2.4 . . . . . . . . . . 1 26.9 7.9 97.8 . . . . . . . . . . . . . 2 26.9 7.9 97.8 . . . . . . . . . . . . . 3 26.9 7.9 97.8 . . . . . . . . . . . . . 4 26.9 7.9 97.8 7.1 11.9 2.6 . . . . . . . . . . 5 26.9 7.9 97.8 . . . . . . . . . . . . . 6 26.4 7.8 95.6 . . . . . . . . . . . . . 7 26.0 7.7 93.7 . . . . . . . . . . . . . 8 26.0 7.5 91.3 7.0 11.7 5.2 . . . . . . . . . . M
TADLE 3-10. WATER QUALITY DATA COLLECTED FRott LAKE Ate 4A Ale THE WASTE HEAT TREATHENT FACILITY (LAGOONSI DURIfE HAYe 1981. DEpiH T Et1PE R- DISSOLVED PERCENT PH ALKAL- TtRB- tel3 NO3_N O.PO4 N_PO4 T_PO4 504- CU FE FB Zil A1UPE OXYGEf4 SATURATION IH11Y IDITY NG/L is/L ttG/L FE/L NG/L t:G/L t1G/L tG/L tG/L tG/L C tG/L ttG/L NTU CACO 3 STATION -- LAGOOH 2 0 22.2 7.7 87.4 7.0 11.6 3.1 . . . . . . . . . . I 22.2 7.6 26.3 . . . . . . . . . . . . . 2 22.2 7.6 86.3 . . . . . . . . . . . . . 3 22.1 7.6 86.1 . . . . . . . . . . . . . 4 21.8 7.5 8%.5 . . . . . . . . . . . . . 5 21.8 7.5 84.5 . . . . . . . . . . . . . 6 21.6 7.4 83.1 7.0 11.8 ' 2.4 . . . . . . . . . . 7 21.5 7.4 82.9 . . . . . . . . . . . . . 8 21.2 7.2 80.2 . . . . . . . . . . . . . 9 21.0 7.0 77.7 . . . . . . . . . . . . . 10 20.7 6.8 75.1 . . . . . . . . . . . . . 11 20.1 6.4 69.8 7.1 12.1 4.6 . . . . . . N STAT 10tl -- LAGOON 3 7 0 21.2 7.3 81.3 7.1 11.0 3.6 . . . . . . . . . . 1 21.2 7.2 80.2 . . . . . . . . . . . . . 2 21.2 7.2 80.2 . . . . . . . . . . . . . 3 21.2 7.2 80.2 . . . . . . . . . . . . . 4 21.1 7.2 80.1 . . . . . . . . . . . . . 5 21.0 7.2 79.9 . . . . . . . . . . . . . 6 20.9 7.1 78.7 7.1 10.9 3.8 . . . . . . . . . . 7 20.7 7.1 78.4 . . . . . . . . . . . . . 8 20.7 7.1 78.4 . . . . . . . . . . . . . 9 20.7 7.1 78.4 . . . . . . . . . . . . . 10 20.6 7.1 78.2 . . . . . . . . . . . . . 11 20.6 7.1 78.2 7.0 11.5 6.0 . . . . . . . . . . STAT 10t4 -- ELK CREEK 0 22.4 7.7 87.8 7.1 12.2 2.0 . . . . . . . . . . I 22.3 7.7 87.6 . . . . . . . . . . . . . 2 21.6 7.7 86.5 . . . . . . . . . . . . . 3 20.8 7.7 85.2 . . . . . . . . . . . . . 4 20.7 7.6 83.9 7.1 11.7 3.2 . . . . . . . . . . 5 20.5 7.5 82.5 . . . . . . . . . . . . .
- 6 20.2 7.4 80.9 . . . . . . . . . . . . .
7 19.7 7.1 76.9 . . . . . . . . . . . . . 8 19.6 7.0 75.7 7.2 11.8 4.0 . . . . . . . . . .
O 1 4 1 ABLE 3-30. HATER QUALITT DATA COLLECTED FROtt LAKE AttlA Ate THE WASTE HE AT TREATP1ENT FACILITY E LAGOOH5) DUR1tG t1AY. 1981. DEPTH TEt1PER- DIS $0LVED PERCEPIT PH ALKAL- TURB- 7443 NO3_N 0-PO4 ft_PO4 T_PO4 504 CU FE PB Zie ATURE OXYGEtt SATURATION IHITY IDITY #1G/L t1G/L 81G/L 81G/L 11G/L 81G/L tG/L t1G/L t1G/L IG/L C 11G/L f1G/L HTU CACO 3 STATI0t1 -- #11LLPDFS CREEK 0 21.5 7.8 87.4 7.1 12.3 3.4 . . . . . . . . . . 1 21.5 7.8 87.4 . . . . . . . . . . . . . 2 21.5 7.7 86.3 . . . . . . . . . . . . . 3 21.3 7.7 46.0 . . . . . . . . . . . . . 4 21.2 7.7 85.8 . . . . . . . . . . . . . 5 21.0 7.7 85.5 7.1 11.8 3.2 . . . . . . . . . . 6 20.8 7.6 84.1 . . . . . . . . . . . . . 7 20.5 7.6 83.6 . . . . . . . . . . . . . 8 20.4 7.6 83.4 . . . . . . . . . . . . . 9 20.3 7.5 82.2 . . . . . . . . . . . . . 10 20.2 7.5 82.0 7.0 11.2 4.8 . . . . . . . . . . 8 m N U1 a I ? { i I I e
TABLE 3-11. WATER QUALITT DATA COLLECTED FR0tt LAKE A181A Ate THE WASTE HEAT TREAlt1EtlT FACILITY ILAGOONSI DURItG JLA4E . 1981. DEPTH TEt1PER- ' DISSOLVED PERCEllT PH ALKAL- TURB- tel3 H03.N 0-PO4 ttJ04 T_PO4 504 CU FE PB Ita AIURE OXYGEll SATURAT10tl IllITY
- IDITY t1G/L tG/L PG/L tG/L t1G/L tG/L t1G/L tG/L iG/L IG/L C t1G/L t!G/L tlTU CACO 3 STATION -- DAtt 6 26.6 6.4 78.8 6.7 8.0 3.0 0.1 0.55 0.01 0.05 0.06 5.9 0.00 0.15 0.00 0.00 1 26.5 6.3 77.4 . . . . . . . . . . . . .
2 26.5 6.5 79.9 . . . . . . . . . . . . . 3 26.5 6.5 79.9 . . . . . . . . . . . . . 4 26.5 6.6 81.1 . . . . . . . . . . . . . 5 26.5 6.6 81.1 . . . . . . . . . . . . . 6 26.4 6.6 80.9 . . . . . . . . . . . . . 7 26.0 6.2 75.5 . . . . . . . . . . . . . 8 25.7 6.2 75.1 6.8 9.7 2.2 0.1 0.57 0.01 0.04 0.05 11.3 0.00 0.10 0.00 0.C0 9 25.1 5.9 70.7 . . . . . . . . . . . . . 10 22.1 4.9 55.5 . . . . . . . . . . . . . 11 21.3 3.7 41.3 . . . . . . . . . . . . . 8 12 20.4 3.3 36.2 . . . . . . . . . . . . . ra 13 19.1 2.5 26.8 . . . . . . . . . . . . . 0% 14 17.4 1.6 16.6 . . . . . . . . . . . . . 15 16.6 0.8 8.1 . . . . . . . . . . . . . 16 16.1 0.6 6.0 . . . . . . . . . . . . . 17 15.9 0.6 6.0 6.6 17.0 3.0 0.2 0.51 0.01 0.04 0.05 9.0 0.00 0.20 0.00 0.03 STATION -- INTAKE O 27.3 7.1 88.5 6.9 14.0 4.1 0.1 0.54 0.01 0.02 0.03 11.3 0.02 0.05 0.00 0.03 1 27.3 7.0 87.3 . . . . . . . . . . . . . 2 27.2 6.8 84.6 . . . . . . . . . . . . . 3 27.2 7.0 87.1 . . . . . . . . . . . . . 4 27.2 7.0 87.1 . . . . . . . . . . . . . 5 27.2 7.0 87.1 6.6 11.0 2.5 0.2 0.53 0.01 0.02 0.03 9.9 0.00 0.10 0.00 0.00 6 27.2 7.0 87.1 . . . . . . . . . . . . . 7 27.0 6.9 85.5 . . . . . . . . . . . . . 8 25.8 5.5 66.7 . . . . . . . . . . . . . 9 24.4 3.9 46.1 . . . . . . . . . . . . . 10 23.7 2.8 32.7 6.6 9.0 3.6 0.2 0.49 0.01 0.01 0.02 10.8 0.02 0.13 0.00 0.00 M
E I TABLE 3-11. WATER QUALITY DATA COLLECTED FRON LAKE At#4A AfD THE HASTE HEAT TREATHEHT FACILITY (LAG 00llSt DURIlG JUNE. 1981. o DEP!H T E N!'E R- DISSOLVED PERCENT PH ALKAL- TURB- tel3 HO3_H 0-PO4 ft_PO4 T_PO4 SO4 CU FE PB ZH ATURE OXYGEtt SATURATION IHITY IDITY tG/L ttG/L tE/L tG/L tE/L tG/L ts/L ttG/L tE/L ttG/L C NG/L NG/L HTU CACO 3 STATION -- RT 208 BRIDGE O 28.5 7.7 98.1 6.9 11.0 2.8 . . . . . . 0.00 0.08 0.00 0.03 , 1 28.5 7.7 93.1 . . . . . . . . . . . . . l 2 28.4 7.7 97.9 . . . . . . . . . . . '. . 3 28.3 7.6 96.5 . . . . . . . . . . . . . 4 28.2 7.6 96.3 . . . . . . . . . . . . . 5 28.0 7.5 94.7 6.8 10.0 2.9 . . . . . . 0.00 0.10 0.00 0.03 6 27.7 7.2 90.4 . . . . . . . . . . . . . 7 26.9 6.4 79.2 . . . . . . . . . . . . . 8 25.9 4.6 55.9 . . . . . . . . . . . . . 9 25.4 4.0 48.2 . . . . . . . . . . . . . 10 24.7 3.5 41.6 6.8 12.2 2.8 . . . . . . 0.03 0.13 0.00 0.03 11 23.5 2.0 23.3 . . . . . . . . . . . . . 1 N STATIDH -- HORTH At04A ARN 7 0 29.2 7.6 98.1 7.0 T 4.7 4.7 0.1 0.43 0.01 0.07 0.08 12.1 0.03 0.15 0.06 0.00 1 29.1 7.5 96.6 . . . . . . . . . . . . . 2 28.7 7.5 95.9 . . . . . . . . . . . . . 3 20.4 7.5 95.4 6.9 14.0 4.0 0.0 0.35 0.02 0.13 0.15 10.3 0.03 0.20 0.06 0.00 4 20.2 6.8 C6.2 . . . . . . . . . . . . . 5 27.9 6.0 75.6 . . . . . . . . . . . . . 6 27.0 2.6 32.2 6.6 14.0 4.5 0.1 0.31 0.01 0.07 0.08 9.7 0.03 0.20 0.00 0.00 7 26.2 0.4 4.9 . . . . . . . . . . . . . STATION -- PAPIUIEEY ARN 0 29.0 7.5 96.5 7.0 14.0 4.0 0.1 0.41 0.01 0.04 0.05 9.9 0.02 0.10 0.00 0.00 _ 1 29.0 7.6 97.7 . . . . . . . . . . . . . 2 20.9 7.8 100.1 . . . . . . . . . . . . . 3 28.6 7.8 94.6 7.0 11.9 2.4 0.1 0.36 0.01 0.05 0.06 9.5 0.03 0.15 0.C0 0.00 4 28.5 7.7 98.1 . . . . . . . . . . . . . i 5 2S.2 7. 0 ' 88.7 . . . . . . . . . . . . . 6 27.4 3.6 45.0 . . . . . . . . . . . . . 7 25.8 0.3 3.6 6.8 14.0 4.4 0.1 0.31 0.01 0.08 0.09 9.4 0.05 0.15 0.00 0.00 i m e
TABLE 311 WATER QUALITY DATA COLLECTED FRot1 LAKE Al84A Ate THE WASTE HEAT TREATt1ENT FACILITY (LAG 00HSI DURING JtRIE. 1981. DEPTH TEltPER- 01550LVED FERCEt4T PH AlkAL- TURB- tal3 NO3_N 0-PO4 t1JO4 Tf 04 SO4 CU FE FS Zie ATURE OXYGEN SATURAT10t4 ItIITY IDITY 11G/L, 21G/L 11G/L t1G/L t'.G/L t1G/L ~ t:G/L ' ttG/L ttG/L t*.G/L C t1G/L FIG /L I41 0 CACO 3 STATI0tl -- Cot (TRARY CREEK BAY 0 28.7 7.6 97.2 6.9 11.1 3.0 . . . . . . 0.03 0.10 0.00 0.05 1 28.7 7.6 97.2 . . . . . . . . . . . . . 2 28.5 7.6 96.8 . . . . . . . . . . . . . 3 28.2 7.6 96.3 . . . . . . . . . . . . . 4 28.0 7.4 93.4 6.9 10.6 2.5 . . . . . . 0.03 0.10 0.00 0.03 5 27.6 7.0 87.7 . . . . . . . . . . . . . 6 27.2 6.7 83.4 . . . . . . . . . . . . . 7 26.5 6.5 79.9 6.7 9.8 2.8 . . . . . . 0.06 0.33 0.00 0.06 8 26.0 4.0 48.7 . . . . . . . . . . . . . STATI0tl -- C0t(TRARY CREEK BRI
.e.
N ' 0 28.6 7.7 98.3 6.9 7.8 3.7 . . . . . . . . . . 7 1 28.4 7.6 96.7 . . . . . . . . 2 28.3 7.4 93.9 . . . . . . . . . . . . . 3 28.2 7.2 91.2 7.0 10.0 3.7 . . . . . . . . . . 4 27.8 6.9 86.8 . . . . . . . . . . . . . 5 25.8 5.0 60.6 . . . . . . . . . . . . . 6 25.5 1.7 20.5 6.7 11.0 5.4 . . . . . . . . . . STAT 10tl -- LAG 00tl 1 0 32.5 6.9 93.9 6.8 10.1 2.8 0.1 0.50 0.01 0.06 0.07 10.3 0.00 0.13 0.C0 0.00 1 32.5 6.5 88.4 . . . . . . . . . . . . . 2 32.3 6.5 83.2 . . . . . . . . . . . . . 3 32.2 6.5 85.1 . . . . . . . . . . . . . 4 31.8 6.5 87.6 . . . . . . . . . . . . . 5 31.7 6.5 87.5 6.9 10.6 3.0 0.2 0.52 0.01 0.01 0.02 9.5 0.00 0.08 0.00 0.00 6 31.6 6.5 87.4 . . . . . . . . . . . . . 7 31.4 6.5 87.1 . . . . . . . . . . . . . 8 31.4 6.5 87.1 . . . . . . . . . . . . . 9 31.4 6.5 87.1 6.8 10.7 2.8 0.2 0.49 0.01 0.01 0.02 10.8 0.00 0.10 0.00 0.00 10 31.3 6.5 87.0 . . . . . . . . . . . . . W
/
1
TABLE 311. HATER QUALITT DATA COLLECTED FRott LAKE AtalA Ato THE HASTE HEAT TREAlt1ENT FACILITY 4 LAGO0 tis) DURIIG JLA1E . 1981. C 'TH T Et1PE R- DISSOLVED PERCENT PH ALKAL- TURB- tat 3 NO3_H 0-PO4 ft_PO4 T PO4 T44 CU FE PB ZH AluRE OXfGEta SA1URAT1014 IHITY IDITY 11G/L HG/L t1G/L ttG/L t1G/L t1G/L t1G/L t1G/L t*.G/ L 81G/L C t1G/L t1G/L IITU CACO 3 STAT 10tl -- LAGOOH 2 0 31.2 7.3 97.6 6.8 9.8 1.8 . . . . . . . . . . 1 31.2 7.4 96.9 . . . . . . . . . . . . . 2 31.1 7.4 98.8 . . . . . . . . . . . . . 3 30.8 7.4 95.4 . . . . . . . . . . . . . 4 30.6 7.2 95.5 . . . . . . . . . . . . . 5 30.6 7.2 95.5 . . . . . . . . . . . . . 6 30.5 7.1 94.0 6.9 10.2 1.7 . . . . . . . . . . 7 30.5 7.1 94.0 . . . . . . . . . . . . . 8 30.4 7.1 93.9 . . . . . . . . . . . . . 9 25.3 3.1 37.3 . . . . . . . . . . . . . 10 22.9 2.9 33.4 6.7 11.1 3.3 . . . . . . . . . . s STATI0te -- LAGOOH 3 C w s 0 29.6 7.1 92.3 6.9 10.5 2.6 0.1 0.54 0.01 0.03 0.04 10.3 0.05 0.08 0.00 0.05 1 29.6 7.2 93.6 . . . . . . . . . . . . . 2 29.6 7.1 92.3 . . . . . . . . . . . . . 3 29.6 7.1 92.3 . . . . . . . . . . . 4 . . 4 29.5 7.1 92.2 . . . . . . . . . . . . . 5 29.5 6.9 89.6 . . . . . . . . . . . . . 6 29.4 7.0 90.7 6.8 8.9 2.2 0.1 0.52 0.01 0.16 0.17 11.3 0.03 0.0G 0.00 0.03 7 29.4 7.1 92.0 . . . . . . . . . . . . . 8 29.4 7.2 93.3 . . . . . . . . . . . . . 9 29.3 7.1 91.8 . . . . . . . . . . . . . 10 29.3 7.0 90.5 . . . . . . . . . . . . . Il 29.1 6.9 88.9 . . . . . . . . . . . . . 12 28.5 5.8 73.9 6.8 8.9 2.9 0.2 0.48 0.02 0.04 0.06 10.1 0.04 0.15 0.00 0.00
,, STAl!Otl -- ELK CREEK 0 31.1 7.2 96.1 7.0 10.1 1.8 . . . . . . . . . .
1 30.8 7.2 95.7 . . . . . . . . . . . . . 2 30.7 7.2 95.6 . . . . . . . . . . . . . 3 30.6 7.2 95.5 . . . . . . . . . . . . . 4 30.4 7.2 95.2 6.9 10.2 2.6 . . . . . . . . . . 5 30.3 6.7 48.5 . . . . . . . . . . . . .
- - 6 30.1 6.7 83.3 . . . . . . . . . . . . .
7 30.0 6.7 L7.8 . . . . . . . . . . . . . 8 29.7 5.9 76.9 6.8 10.7 2.4 . . . . . . . . . .
i TABLE 3-11. HA1ER QUALITY DATA COLLECTED FPON LAKE Alt 4A-Ate THE WASTE HEAT TREATHENT FACILITY ILAGO0t4SS DWItG jut 4E, 1981. DEPTH TEt1PER- DI550LVED PERCENT PH A LF AL- TURS- 7443 H03.N 0-PO4 M_P(M T_P(H SO4 CU FE PB 274 A1URE OXVGEll SATURATION IHITY IDITV t1G/L NG/L t1G/L tG/L t1G/L - FG/L tG/L tc/L t1G/L is/L C tG/L tG/L HTU CACO 3
~
STATI0tl -- MILLPote CREEK 0 30.8 7.2 95.7 6.8 8.3 2.2 . . . . . . . . . . 1 30.7 7.1 94.3 . . . . . . . . . . . . . 2 30.4 7.1 93.9 . . . . . . . . . . . . . 3 30.3 7.1 93.8 . . . . . . . . . . . . . 4 30.2 7.0 92.3 . . . . . . . . . . . . . 5 30.0 6.7 87.8 6.9 10.0 2.6 . . . . . . . . . . 6 29.8 6.4 83.5 . . . . . . . . . . . . . 7 29.4 6.2 60.3 . . . . . . . . . . . . . 6 29.0 S.9 75.9 . . . . . . . . . . . . . 9 27.6 5.0 62.7 . . . . . . . . . . . . . 10 23.1 3.9 45.0 6.8 10.8 3.1 . . . . . . . . . . s N O e I i 4 1 N 6 b
.mo 6
TABLE 3-12. WATER QUALITV DATA COLLECTED FR0t1 LAKE AINA AfD THE WASTE HEAT TREATHENT FACILITY (LAGOONSI OURItG JULYe 1981. DEPTH T EttPE R- DISSOLVED PERCEtiT PH ALKAL- TURB- tal3 NO3_H 0-PO4 Pf_PO4 T_PO4 SO4 CU FE PB Zil AIURE OXYGEH SATURATION INITY IDITY NG/L NG/L tG/L t1G/L NG/L tG/L IG/L t1G/L IG/L tG/L C t1G/L NG/L tiTU , CACO 3 t l STATION -- DAtt 1 0 28.9 6.5 83.4 6.7 9.4 2.0 . . . . . . . . . . 1 28.9 6.5 83.4 . . . . . . . . . . . . . = 2 28.9 6.5 83.4 . . . . . . . . . . . . . 3 28.9 6.5 83.4 . . . . . . . . . . . . . 4 28.9 6.5 83.4 . . . . . . . . . . . . . 5 28.9 6.5 83.4 . . . . . . . . . . . . . 6 28.9 6.5 83.4 . . . . . . . . . . . . . 7 28.9 6.5 83.4 . . . . . . . . . . . . . 8 28.9 6.5 83.4 6.7 9.8 3.0 . . . . . . . . . . 9 28.8 6.4 82.0 . . . . . . . . . . . . . 10 28.7 5.4 69.1 . . . . . . . . . . . . . Il 27.7 5.2 65.3 . . . . . . . . . . . . . 1 12 27.0 4.5 55.8 . . . . . . . . . . . . . w 13 14 25.9 25.3 1.5 1.2 18.2 14.4 7 , 15 24.7 0.2 2.4 . . . . . . . . . . . . . 16 23.4 0.2 2.3 . . . . . . . . . . . . . 17 20.3 0.3 3.3 6.8 25.1 4.4 . . . . . . . . . . STATION -- IHTAKE O 28.8 7.1 91.0 6.7 11.5 2.2 . . . . . . . . . .
= 1 28.8 7.1 91.0 . . . . . . . . . . . . .
2 28.8 7.0 89.7 . . . . . . . . . . . . . 3 28.8 7.0 89.7 . . . . . . . . . . . . . 4 28.8 7.0 89.7 . . . . . . . . . . . . . 5 2S.8 7.0 89.7 6.5 10.8 2.6 . . . . . . . . . 6 28.8 6.8 87.1 . . . . . . . . . . . . . 7 28.6 6.6 e4.3 . . . . . . . . . . . . . 8 28.0 5.7 72.0 . . . . . . . . . . . . . 9 27.3 3.7 46.1 . . . . . . . . . . . . . 10 26.5 1.5 18.4 . . . . . . . . . . . . . 11 26.1 0.9 11.0 0.6 12.9 3.0 . . . . . . . . . .
\
W
TA8LE 3-12. HATER QUALITY DATA COLLECTED FRON LAKE AtalA AND THE WASTE HEAT TREATNEtIT FACILITY (LAG 00tfS) DURItG JULY. 1981. DEPTH TEMPER- DISSOLVED PERCEt4T PH A LK A L- TURB- tet3 HO3_N 0-PO4 H_PO4 T_F04 504 CU FE PB Ita ATURE OXYGEll SATURATIDH INITT IDITT NG/L NG/L 11G/L t1G/L NG/L NG/L ttG/L NG/L NG/L ttG/L C HG/L tt3/L HTU CACO 3 STATIDH -- RT 208 BRIDGE ' 0 29.0 7.7 99.0 6.6 10.9 1.6 . . . . . . . . . . 1 29.0 7.7 99.0 . . . . . . . . . . . . . 2 28.9 7.6 97.6 . . . . . . . . . . . . . 3 28.9 7.5 96.3 . . . . . . . . . . . . . 4 28.8, 7.3 93.5 . . . . . . . . . . . . . 5 28.5 7.1 90.5 6.8 12.2 2.4 . . . . . . . . . . 6 28.2 6.5 82.4 . . . . . . . . . . . . . 7 28.0 6.2 78.3 . . . . . . . . . . . . . 8 27.4 4.8 59.9 . . . . . . . . . . . . . 9 26.9 2.5 30.9 . . . . . . . . . . . . . 10 26.6 1.4 17.2 . . . . . . . . . . . . . 11 26.2 0.3 3.7 . . . . . . . . . . . . . -- 12 25.9 0.4 4.9 6.5 13.1 3.6 . . . . . . . . . . Me STATI0t4 -- NORTH At#4A ARN O 28.9 7.7 98.8 6.9 12.8 4.0 . . . . . . . . . . 1 28.9 7.7 93.8 . . . . . . . . . . . . . 2 28.8 7.5 96.1 . . . . . . . . . . . . . 3 28.7 7.2 92.1 6.9 14.1 5.2 . . . . . . . . . . 4 28.4 7.0 89.0 . . . . . . . . . . . . . 5 27.9 5.3 66.8 . . . . . . . . . . . . . 6 27.4 2.0 25.0 6.7 15.6 4.0 . . . . . . . . . . 5 TAT 10t4 -- PANUllKEY ARN O 29.1 8.4 108.2 6.8 12.7 4.2 . . . . . . . . . . 1 29.1 8.4 108.2 . . . . . . . . . . . . . 2 29.1 8.3 106.9 . . . . . . . . . . . . . 3 29.0 8.2 105.5 6.8 13.0 4.2 . . . . . . . . . . 4 28.6 7.4 94.5 . . . . . . . . . . . . . 5 28.1 6.0 75.9 . . . . . . . . . . . . . 6 27.5 3.8 47.5 6.8 14.4 5.2 . . . . . . . . . . 7 27.1 0.4 5.0 . . . . . . . . . . . . . ~ J
TABLE 3-12. MATER QUALITY DATA COLLECTED FRoli LAKE Ata4A ate) THE WASTE HEAT TREATt1ENT FACILITY E LAG 00HS) DURItG JULY. 1981. DISSOLVEC PERCEHT PH AtKAL- TURB- tel3 HO3_H 0-PO4 H_PO4 T_PO4 $04 CU FE PB Ita DEPTH T EttPER-AT LKIE OX1GEtt SAlORATIOH IHITY IDIIf HG/L PG/L tG/L tG/L tG/L NG/L tG/L PG/L NG/L tG/L C tG/L ttG/L IITU CACO 3 STATION -- COHTRARY CREEK BAY 0 29.2 8.2 105.8 6.7 10.4 1.8 . . . . . . . . . . 1 29.2 8.2 105.8 . . . . . . . . . . . . . 2 29.1 8.2 105.6 . . . . . . . . . . . . . 3 29.1 8.1 104.4 . . . . . . . . . . . . . 4 28.9 7.9 101.4 6.7 10.3 2.2 . . . . . . . . . . 5 28.4 7.5 95.4 . . . . . . . . . . . . . 6 27.9 6.5 81.9 . . , 7 27.7 5.3 66.6 . . . . . . . . . . . . . 8 27.2 4.1 51.0 6.6 9.4 2.8 . . . . . . . . . . STATION -- CONTRARY CREEK CRI
.e*
w ' 0 29.1 8.1 104.4 6.7 8.2 3.0 . . . . . . . . . . y ( 1 29.1 8.1 104.4 . . . . . . . . . . . . . 2 29.0 8.1 104.2 . . . . . . . . . . . . . 3 29.0 8.0 102.9 6.6 8.9 2.4 . . . . . . . . . . 4 23.7 7.7 98.5 . . . . . . . . . . . . 5 27.7 4.2 52.1 . . . . . . . . . . . . . 6 26.8 1.5 18.5 . . . . . . . . . . . . . 7 26.2 0.5 6.1 6.4 10.8 11.2 . . . . . . . . . . 5iATION - . LAG 00tl 1 0 33.6 6.5 89.8 6.7 9.6 2.1 . . . . . . . . . . 1 33.5 6.4 88.3 . . . . . . . . . . 2 33.5 6.4 85.3 . . . . . . . . . 3 33.4 6.4 83.2 . . . . . . . . 4 33.2 6.4 87.9 6.7 10.0 2.3 . . . . . . . . . . 5 33.1 6.4 67.8 . . . . . . . . . . . 6 35.0 6.4 87.7 . . . . . . . . . 7 33.0 6.4 87.7 . . . . . . . . . 8 32.5 6.1 63.0 6.6 11.6 2.1 . . . . . . . . . . M 1 L____-__ _
TABLE 3-12. HATER QUALITY DATA COLLECTED FR0t1 LAME AltlA Atm THE WASTE ilEAT TREATHEt4T FACILITY ILAG00t4Si DURING JULY. 1981. DEPTH TEMPER- DISSOLVfD PERCEt4T PH ALKAL- TURB- t443 NO3_H 0-PO4 ft_PO4 T_PO4 504 CU FE PB Ita ATURE OXYGEtt SATURAT10t3 ItalTY IDITY #1G/L NG/L 11G/L t1G/L NG/L PG/L tG/L 81G/L tG/L tG/L C hG/L NG/L HTU CACO 3 STATION -- LAGOOH 2 0 32.4 7.8 106.0 6.6 10.3 2.0 . . . . . . . . . . I 1 32.3 7.7 104.5 . . . . . . . . . . . . . 2 31.8 7.5 101.1 . . ' . . . . . . . . . . . 3 31.7 7.4 99.6 . . . . . . . . . . . . . 4 31.6 7.3 93.1 . . . . . . . . . . . . . 5 31.4 7.3 97.9 6.6 10.7 2.0 . . . . . . . . . . 6 31.3 7.2 96.4 . . . . . . . . . . . . . 7 31.2 6.8 90.9 . . . . . . . . . . . . . 8 30.8 6.7 89.1 . . . . . . . . . . . . . 9 29.9 5.5 71.9 . . . . . . . . . . . . . 10 28.8 4.3 55.1 6.8 30.5 2.0 . . . . . . . . . . 11 28.4 3.2 40.7 . w STAT 1084 -- LAGOOH 3 [ 0 31.0 8.0 106.7 6.7 11.8 2.1 . . . . . . . . . . 1 31.0 7.9 105.3 . . . . . . . . . . . . . 2 30.8 7.9 105.1 . . . . . . . . . . . . . 3 30.7 7.9 104.9 . . . . . . . . . . . . . 4 30.7 7.8 103.6 . . . . . . . . . . . . . 5 30.6 7.8 103.4 6.7 8.3 2.0 . . . . . . . . . . 6 30.5 7.5 99.3 . . . . . . . . . . . . . 7 30.4 7.5 99.2 . . . . , . . . . . . . . . 8 30.3 7.5 99.1 . . . . . . . . . . . . . 9 30.2 7.4 97.6 . . . . . . . . . . . . . 10 30.0 7.2 94.3 . . . . . . . . . . . . . 11 30.0 7.1 93.0 6.7 10.0 4.5 . . . . . . . . . . STATION -- ELK CREEK a 0 32.0 7.7 104.1 6.7 9.2 1.7 . . . . . . . . . . 1 31.9 7.7 103.9 . . . . . . . . . . . . . 2 31.3 7.9 105.8 . . . . . . . . . . . . . 3 30.8 7.9 105.1 . . . . . . . . . . . . . 4 30.7 7.7 102.3 6.7 9.2 2.2 . . . . . . . . . 5 30.6 7.4 98.1 . . . . . . . . . . . . .
- 6 30.4 7.2 95.2 . . . . . . . . . . . . .
7 30.3 6.8 89.8 . . . . . . . . . . . . . 8 30.0 6.4 83.8 6.7 10.0 3.0 . . . . . . . . . . 9 29.9 5.2 68.0 . . . . . . . . . . . . . 1
JULY, 1981. TADLE 3-12. WATER QUALITY DATA COLLECTED FR0tt LAKE At04A Am THE WASTE HEAT TREAittENT F ACILITY (LAG 00N55 DUR1HG l tel3 CU FE PB ZH I DEPfH TE t1PE R- DISSOLVED PERCENT PH ALKAL- TURB- HO3_N 0-PO4 tt_PO4 T_PO4 S(M AIURE OXyGEH SATURATION IHITY IDITY t1G/L ttG/L tlG/L ttG/L ttG/L t!G/L t1G/L t1G/L tG/L !!G/L C t1G/L HG/L HTU CACO 3 0 31.5 7.4 99.3 6.6 9.5 2.0 . . . . . . . . 1 31.5 7.3 98.0 . . . . . . . . . 2 31.3 7.4 99.1 . . . . . . . . . . . 3 30.9 7.4 98.5 . . . . . . . . . 4 30.8 7.4 98.4 . . . . . . . . 5 30.7 7.4 98.3 6.9 10.6 2.4 . . . . . . l . . . l 6 30.5 7.3 96.7 . . . . . . . . . . I 7 30.4 7.3 96.6 . . . . . . . . . . . . 8 30.2 6.8 89.7 . . . . . . . . . 9 29.9 5.8 75.8 6.7 10.3 3.0 . . . . . . . . . . le 29.7 5.2 67.7 . . . . . . . . . . 11 29.0 3.0 38.6 . . . . . . . . . . . . 8 ATE 9 m W
TABLE 3-13. WATER QUALITY DATA COLLECTED FRott LAKE AtttA Ate THE WASTE HEAT TREAft1ENT FACILITT (LAGOONS) DURItlG AUGUST, 1981. i DEPIH TErlPER- DISSOLVED PEPCEtiT PH ALKAL- TUR8- tet3 HO 3_H 0-PO4 t1_PO4 T_PO4 504 CU FE PB Zil - ATURE OXYGEtt SATURATION IllIT Y IDITY NG/L ttG/L t1G/L t1G/L f1G/L IG/L t1G/L t1G/L ttG/L 81G/L C HG/L NG/L I41U CACO 3 STATI0t4 -- DAM 0 27.8 6.1 76.7 6.7 11.5 2.3 . . . . . . . . . . 1 27.8 6.1 76.7 . . . . . . . . . . . . . 2 27.8 6.2 78.0 . . . . . . . . . . . . . 3 27.8 6.2 78.0 . . . . . . . . . . . . . 4 27.8 6.2 78.0 . . . . . . . . . . . . . 5 27.8 6.1 76.7 . . . . . . . . . . . . . 6 27.8 6.1 76.7 . . . . . . . . . . . . . 7 27.8 6.1 76.7 . . . . . . . . . . . . . 8 27.8 6.1 76.7 7.0 13.1 2.8 . . . . . . . . . . 9 27.8 6.1 76.7 . . . . . . . . . . . . . 10 27.7 6.1 76.6 . . . . . . . . . . . . . 11 27.6 5.0 62.7 . 12 27.4 4.7 55.7 . . . . . . . . . . . . . j% 13 27.3 4.4 54.8 . . . . . . . . . . . . . s 14 27.3 3.7 46.1 . . . . . . . . . . . . . 15 26.4 0.6 7.4 . . . . . . . . . . . . . I 16 24.3 0.0 0.0 6.9 26.1 S.3 . . . . . . . . . . 17 23.2 0.0 0.0 . . . . . . . . . . . . . STATI0ft -- INTAKE o 27.1 5.9 73.3 6.8 11.5 2.0 . . . . . . . . . . . 1 27.1 b.9 73.3 . . . . . . . . . . . . . 2 27.1 5.9 73.3 . . . . . . . . . . . . . 3 27.1 5.9 73.3 . . . . . . . . . . . . . 4 27.1 5.8 72.0 . . . . . . . . . . . . . 5 27.1 5.8 72.0 6.8 14.0 2.1 . . . . . . . . . . 6 27.1 5.8 72.0 . . . . . . . . . . . . . 7 27.1 5.8 72.0 . . . . . . . . . . . . . 8 27.1 5.8 72.0 . . . . . . . . . . . . . 9 27.1 5.0 62.1 . . . . . . . . . . . . . 10 27.0 5.0 62.0 7.0 14.0 2.6 . . . . . . . . . . 11 26.9 5.1 63.1 . . . . . . . . . . . . . W 4
TABLE 3-13. WATER QUALITY DATA COLLECTED FRoli LAKE AtelA Ale THE WASTE HEAT 1REATHEHT FACILITY (LAGOOllSI CURING AUGUST. 1981. DEP1H TEt1PER- DISSOLVED PERCENT RI ALKAL- TURB- tel3 NO3_N 0-PO4 H_PO4 T_PO4 SO4 CU FE PD 214 A IUR E OXYGEli SATURATION Ill1TY . IDITY NG/L, 31G/L t1G/,L NG/L NG/L 81G/L ' F1G/L ' t1G/L 81G/L ttG/L C tG/L
- NG/L HTU CACO 3 STATION -- RT 208 BRIDGE O 27.1 6.9 85.7 6.7 11.8 2.2 . . . . . . . . . .
1 27.1 6.9 85.7 . . . . . . . . . . . . . 2 27.1 6.9 85.7 . . . . . . . . . . . . . 3 27.1 6.9 85.7 . . . . . . . . . . . . . 4 27.1 6.9 85.7 . . . . . . . . . . . . . 5 27.1 6.9 85.7 6.8 14.0 2.4 . . . . . . . . . . 6 27.1 6.9 85.7 . . . . . . . . . . . . . 7 27.1 6.8 64.5 . . . . . . . . . . . . . 8 27.1 6.8 84.5 . . . . . . . . . . . . . 9 27.1 6.5 80.7 . . . . . . . . . . . . . 10 27.0 5.2 64.5 6.8 11.7 2.5 . . . . . . . . . . 11 26.8 3.4 42.0 . . . . . . . . . . . . - JL w STATION -- HORTH At#4A ARN 7 0 26.9 6.7 82.9 6.8 12.5 4.6 . . . . . . . . . . I 26.9 6.7 82.9 . . . . . . . . . . . . . 2 26.9 6.7 82.9 . . . . . . . . . . . . . 3 26.9 6.6 81.7 6.9 12.2 4.6 . . . . . . . . . . 4 26.7 6.0 74.0 . . . . . . . . . . . . . 5 26.6 5.5 67.7 . . . . . . . . . . . . . 6 26.5 4.8 59.0 6.9 14.5 10.0 . . . . . . . . . . STATIDH -- PAf1UllKEY ARN O 26.8 5.2 64.2 6.9 16.4 5.7 . . . . . . . . . . 1 26.9 5.3 65.6 . . . . . . . . . . . . . 2 26.9 5.3 65.6 . . . . . . . . . . . . . 3 26.8 5.2 64.2 6.8 14.8 6.4 . . . . . . . . . . 4 26.8 4.9 60.5 . . . . . . . . . . . . . 5 26.8 4.5 55.6 . . . . . . . . . . . . . 6 26.8 2.1 25.9 6.8 16.0 7.6 . . . . . . . . . . 7 26.7 0.0 0.0 . . . . . . . . . . . . . M 9
TABLE 3-13. WATER QUALITY DATA COLLECTED FROM LAKE AtalA AtB THE WASTE HEAT TREATt1ENT FACILITY (LAGOOHS) DURItG AUGUST. 1981. OEPTH TEMPER- DISSOLVED PERCENT PH ALKAL- TIFB- tH3 NO 3_N 0-PO4 it_PO4 T_PO4 504 CU FE PB IN ATURE OXYGEN SATURATION IHITY 101TY t1G/L tG/L tG/L tG/L tG/L tG/L tG/L tG/L tG/L tG/L C IG/L tG/L HiU CACO 3 STATIDH - CONTRART CREEK BAY 0 27.2 7.5 93.3 6.8 9.5 2.5 . . . . . . . . . *. 1 27.2 7.5 93.3 . . . . . . . . . . . . . 2 27.2 7.6 94.6 . . . . . . . . . . . . . 3 27.2 7.5 93.3 . . . . . . . . . . . . . 4 27.2 7.5 93.3 6.6 11.0 2.4 . . . . . . . . . . 5 27.2 7.5 93.3 . . . . . . . . . . . . . 6 27.2 7.1 83.3 . . . . . . . . . . 7 27.1 7.1 88.2 6.8 10.0 3.1 . . . . . . . . . . 8 27.0 6.9 85.S . . . . . . . . . . . . . STATION -- COHTRARf CREEK BRI e a w 0 27.0 8.0 99.2 6.8 9.5 2.5 . .
. . . . . . . . . C3 1 27.0 8.0 99.2 . . . . . . . . . . . . .
2 27.0 7.9 97.9 . . . . . . . . . . . . . 3 27.0 7.9 97.9 6.9 11.0 2.5 . . . . . . . . . . 4 26.5 7.5 92.1 . . . . . . . . . . . . . 5 26.3 6.4 78.3 . . . . . . . . . . . . . 6 26.3 5.8 71.0 6.5 7.5 5.6 . . . . . . . . . . 7 26.0 5.1 62.1 . . . . . . . . . . . . . STATION -- LAGOON 1 0 31.4 6.0 80.4 7.0 10.7 2.1 . . . . . . . . . . 1 31.4 6.0 80.4 . . . . . . . . . . . . . 2 31.4 6.0 80.4 . . . . . . . . . . . . . 3 31.1 6.0 80.1 . . . . . . . . . . . . . 4 30.8 6.0 79.8 7.0 12.1 2.3 . . . . . . . . . . 5 30.6 6.0 79.6 . . . . . . . . . . . . . 6 30.6 0.0 79.6 . . . . . . . . . . . . . 7 30.6 6.0 79.6 . . . . . . . . . . . . . 0 30.6 6.0 79.6 6.9 12.0 2.2 . . . . . . . . . . 9 29.4 6.0 77.7 . . . . . . . . . . . . . M .
AL GUST.1981. TABLE 313. HATER QUALITY DATA COLLECTED TROH LAKE At#44 Ata) THE WASTE HEAT TREAlt1Et4T FACILITY ILAGOOHS) DURING PH ALKAL- TUR8- teil H03_H 0.PO4 Pf_PO4 T ,PO4 504 CU TE fB ZH DE P HI T E ttr'E R- D1550LVE0 PERCENT AILAtE OXIGEll SATURATION INITY IDITV t1G/L t1G/L NG/L t1G/L t1G/L I1G/L t1G/L 21G/L 81G/L t1G/L C NG/L NG/L HTU
- CACO 3 STATION -- LAGOOH 2 0 29.5 6.3 81.8 6.7 11.8 2.0 . . . . . . . . . .
1 29.5 6.3 81.8 . . . . . . . . . . . . . 2 29.5 6.3 81.8 . . . . . . . . . . . 3 29.5 6.3 81.8 . . . . . . . . 4 29.5 6.3 81.8 . . . . . . . . . 5 29.4 6.3 81.6 6.7 11.7 2.4 . . . . . . 6 29.4 6.3 81.6 . . . . . . . . . . . . . 7 29.4 6.3 81.6 . . . . . . . . . . . . . i 8 29.2 6.3 81.3 . . . . . . . . . . . J l 9 29.1 5.4 69.6 . . . . . . . . . 10 28.9 4.6 59.0 6.8 11.1 2.4 . . . . . . . . . . 11 28.9 4.6 59.0 . . . . . . . w so l 1 STATIDH -- LAGOOH 3 e 0 28.9 6.7 86.0 6.9 11.3 2.1 . . . . . . . . . . 1 28.9 6.7 86.0 . . . . . . . . . 2 28.9 6.7 86.0 . . . . . . . . 3 28.9 6.7 86.0 . . . . . . . 4 28.9 6.7 86.0 . . . . . . . . . . 5 28.9 6.7 86.0 6.6 12.1 2.9 . . . . . . . . . . 6 28.9 6.7 86.0 . . . . . . . . 7 28.9 6.7 86.0 . . . . . . . . . . 8 28.9 6.8 87.3 . . . . . . . 9 28.9 6.8 87.3 . . . . . . . . 10 28.9 6.7 86.0 6.7 11.1 3.6 . . . . . . . . . . 11 28.8 6.6 84.6 . . . . . . . . . . . . . STATIDtf -- ELK CREEK 0 28.8 7.4 94.8 6.9 12.0 1.8 . . . . . . . . . . 1 28.8 7.4 9 's . 8 . . . . . . . . . . . 2 20.8 7.4 94.8 . . . . . . . . 3 28.8 7.4 94.8 . . . . . . . . 4 28.8 7.4 94.8 6.9 11.1 3.5 . . . . . . . . . . 5 26.8 7.1 91.5 . . . . . . . . . . . . .
- 6 28.8 7.2 92.3 . . . . . . . . . . . . .
7 28.7 7.1 90.8 6.9 12.0 1.8 . . . . . . . 8 28.4 6.8 86.5 . . . . . . . .
TABLE 3-13. WATER QUALITY DATA COLLECTED FRoli LAKE At8tA Ate THE HASTE HEAT TREATt1ENT FACILITY ILAGO0t45) DURIlG AUGUST, 1961. DEPill T Et1PE R- DISSOLVED PERCEtiT PH ALKAL- TURB- tat 3 tiO3_l4 0-PO4 31_PO4 T_PO4 504 CU FE PD Zil ATURE OXYGEtt $ATURATIO14 IttITY IDITY t1G/L t1G/L tG/L ts/L tG/L PG/L tG/L tG/L tG/L tG/L C IG/L tG/L I4TU CACO 3 STATION -- #11LLPote CREEK 0 28.6 7.1 90.6 6.9 12.9 3.4 . . . . . . . . . . 1 28.6 7.1 90.6 . . . . . . . . . . . . . 2 28.6 7.1 90.6 . . . . . . . . . . . . . 3 28.6 7.1 90.6 . . . . . . . . . . . . . 4 28.6 7.1 90.6 . . . . . . . . . . . . . 5 28.6 7.1 90.6 7.0 11.6 2.2 . . . . . . . . . . 6 28.6 7.1 90.6 . . . . . . . . . . . . . 7 28.6 7.1 90.6 . . . . . . . . . . . . . 8 23.6 7.1 90.6 . . . . . . . . . . . . . 9 28.5 6.9 87.9 6.9 11.8 17.0 . . . . . . . . . . 10 28.5 5.9 75.2 . . . . . . . . . . . . . e s.) e W M M M 3 __W
TABLE 3-14. HAIER QUALITY DATA COLLECTED FRON LAKE Af44A Ate THE HASTE HEAT TREATHENT FACILITY E LAGOONS B DURING SEPTEteER.1981. DEPIH . TEMPER- DISSOLVED PERCENT PH ALKAL- TURB- 9513 NO3_H 0-PO4 tt_PO4 T_PO4 504 CU FE PB ZH ATURE OXVGEtt SATURATIDH IHITY IDITY NG/L f1G/L tG/L f1G/L t1G/L F1G/l. i1G/L t1G/L NG/L tG/L C IE/L NG/L HTU CACO 3 STATION -- DAM 0 25.2 6.3 75.6 6.6 12.0 3.4 0.2 1.11 0.01 0.01 0.02 16.0 0.00 0.14 0.00 0.00 1 25.2 6.3 75.6 . . . . . . . . . . . . . 2 25.2 6.3 75.6 . . . . . . . . . . . . . 3 25.2 6.3 75.6 . . . . . . . . . . . . . 4 25.2 6.4 76.8 . . . . . . . . . . . . . 5 25.2 6.4 76.8 . . . . . . . . . . . . . 6 25.2 6.4 76.8 . . . . . . . . . . . . . 7 25.2 6.4 76.8 . . . . . . . .. . . . . . 8 25.2 6.4 76.8 6.4 11.9 2.9 0.2 1.12 0.00 0.02 0.02 16.8 0.00 0.34 0.00 0.00 9 25.2 6.4 76.8 . . . . . . . . . . . . . 10 25.1 6.4 76.6 . . . . . . . . . . . . . 11 24.9 6.1 72.8 . . . . . . . . . . . . . JL 32 24.9 6.0 71.6 . . . . . . . . . . . . . z-13 24.8 6.0 71.5 . . . . . . . . . . . . . 34 24.7 5.4 64.2 . . . . . . . . . . . . . 15 24.7 5.4 64.2 . . . . . . . . . . . . . 16 24.6 5.1 60.5 6.8 12.6 4.0 0.2 1.26 0.05 0.00 0.05 18.8 0.00 0.32 0.00 0.00 17 24.5 2.5 29.6 . . . . . . . . . . . . . 18 24.5 2.5 29.6 . . . . . . . . . . . . . STAT 10H -- IHTAFE O 24.1 6.6 77.6 6.5 10.1 2.2 0.2 0.72 0.00 0.01 0.01 16.0 0.00 0.18 0.00 0.00 1 24.0 6.4 75.1 . . . . . . . . . . . . . 2 24.0 6.4 75.1 . . . . . . . . . . . . . 3 24.0 6.4 75.1 . . . . . . . . . . . . . 4 24.0 6.4 75.1 . . . . . . . . . . . . . 5 24.0 6.4 75.1 6.8 10.8 1.9 0.2 0.84 0.01 0.05 0.06 15.0 0.00 0.20 0.00 0.00 6 24.0 6.4 75.1 . . . . . . . . . . . . . 7 24.0 6.4 75.1 . . . . . . . . . . . . . 8 23.9 6.4 75.0 . . . . . . . . . . . . 9 23.9 6.2 72.6 . . . . . . . . . . . . . 10 23.7 6.2 72.4 . . . . . . . . . . . . . Il 23.7 6.2 72.4 6.6 12.1 3.2 0.2 1.10 0.01 0.00 0.01 18.0 0.00 0.20 0.00 0.00 12 23.6 6.2 72.2 . . . . . . . . . . . . . e
TADLE 3-14. H&TEJ QUALITY DATA COLLECTE3 FRON LAKE Af04A AtB THE HASTE HEAT T' EATHLHT FACILITY (LA 00ftSI DURItG SEPTEteEJ 1981. DEPill TEttPER- DISSOLVED PERCENT PH ALKAL- TURB- tot 3 tG3_H 0-PO4 M_PO4 T_PO4 SO4 CU FE PB IN ATURE OXYGEN SATURATION ItIITY 10!TY tG/L NG/L tG/L tG/L tG/L t1G/L tG/L PC/L tG/L tG/L C tG/L NG/L HTU CACO 3 STATIDH -- RT 208 BRIDGE o 23.7 6.7 78.2 6.6 11.4 2.3 . . . . . . 0.00 0.24 0.00 0.00 1 23.7 6.7 78.2 . . . . . . . . . . . . . 2 23.6 6.7 78.1 . . . . . . . . . . . . . 3 23.5 6.7 77.9 . . . . . . . . . . . . . 4 23.5 6.7 77.9 . . . . . . . . . . . . . 5 23.5 6.7 77.9 6.8 11.7 2.1 . . . . . . 0.00 0.20 0.00 0.00 1 6 23.5 6.7 77.9 . . . . . . . . . . . . . ) 7 23.5 6.7 77.9 . . . . . . . . . . . . . 8 23.5 6.7 77.9 . . . . . . . . . . . . . 9 23.5 6.6 76.8 . . . . . . . . . . . . . 10 23.4 6.6 76.6 6.8 11.5 2.1 . . . . . . 0.00 0.16 0.00 0.00 , 75.5 . . 11 21.4 6.5 . . . . . . . . . . . 12 23.4 6.5 75.5 . . . . . . . . . . . . . [5 STATI0tt -- HORTH Af04A ARM 0 22.7 7.2 82.5 6.8 12.0 6.4 0.1 0.66 0.08 0.01 0.09 17.5 0.00 0.27 0.00 0.00 , 1 22.7 7.1 81.4 . . . . . . . . . . . . . .{ 2 22.6 6.9 78.9 . . . . . . . . . . . . . l 3 22.5 6.8 77.6 6.9 14.7 4.8 0.1 0.86 0.03 0.10 0.13 17.5 0.00 0.45 0.00 0.00 1 4 22.4 6.7 76.4 . . . . . . . . . . . . . ) 5 22.4 6.4 72.9 . . . . . . . . . . . . . 1 6 22.4 5.9 67.2 6.6 12.4 7.1 0.2 1.08 0.04 0.10 0.14 18.0 0.01 0.21 0.00 0.00 STATIDH -- PANUNKEY ARN i 0 22.9 6.8 78.2 6.6 12.9 5.8 0.1 0.71 0.05 0.01 0.06 16.0 0.00 0.37 0.00 0.00 1 22.9 6.7 77.1 . . . . . . . . . . . . . 2 22.7 6.6 75.6 . . . . . . . . . . . . . 3 22.7 6.6 75.6 6.6 13.7 6.1 0.1 0.88 0.04 0.02 0.06 17.5 0.00 0.22 0.00 0.00 4 22.7 6.6 75.6 . . . . . . . . . . . . . i 5 22.7 6.5 74.5 . . . . . . . . . . . . . 6 22.7 6.4 73.3 6.5 14.4 6.2 0.1 1.59 0.04 0.04 0.08 16.4 0.00 0.50 0.00 0.00 7 22.5 6.4 73.1 . . . . . . . . . . . . . W i l Ia .
t TABLE 314. HATER QUALITY DATA COLLECTED FR0l1 LAKE AtalA AfD THE HASTE HEAT 1REATHENT FACILITY ILAG00tlSI DUR1tG SEPTEtEER 1981. T Et1PE R- DISSOLVED PERCEllT PH ALKAL- TURB- l#13 H03_H 0-PO4 it PO4 T_PO4 504 CU FE PB Zi1 DEPTH _ . ATURt OXYGEl4 SAlURATION It4ITY IDITY tG/L NG/L t1G/L NG/L NG/L t1G/L tG/L t1G/L tG/L t1G/L l C NG/L 11G/L IITU CACO 3 STATIDH -- COHIRARY CREEK BAY I 0 23.7 7.6 88.7 6.9 14.7 4.8 . . . . . . . . . . 1 23.5 7.6 88.4 . . . . . . . . . . . . 7.6 2 23.% 83.2 . . . . . . . . . . . . . 3 23.4 7.5 87.1 t, . 9 10.9 2.3 . . . . . . . . . . ; 4 23.4 7.5 87.1 . . . . . . . . . . . . . 5 23.3 7.4 85.7 . . . . . . . . . . . . . 6 23.3 7.3 84.6 . . . . . . . . . . . . . . 7 23.2 7.1 82.1 6.5 10.5 2.6 . . . . . . . . . . 8 23.0 7.0 80.7 . . . . . . . . . . . . . 9 22.7 6.3 72.2 . . . . . . . . . . . . . STATION -- CONTRARY CREEK BRI 1 x-W 0 23.3 7.9 91.5 6.7 10.6 2.3 . . . . . . 0.00 0.36 0.00 0.00 1 23.2 7.8 90.2 . . . . . . . . . . . . . 2 23.1 7.7 88.9 . . . . . . . . . . . . . 3 22.9 7.4 85.1 6.8 10.0 2.5 . . . . . . 0.00 0.38 0.00 0.00 4 22.3 7.3 83.0 . . . . . . . . . . . . . 5 21.8 7.2 81.1 6.6 9.3 4.2 . . . . . . 0.02 0.55 0.00 0.00 STATIDH -- LAGOOH 1 0 31.4 6.5 87.1 7.0 11.1 1.1 0.2 0.70 0.00 0.00 0.00 16.4 0.00 0.15 0.00 0.00 1 31.4 6.5 87.1 . . . . . . . . . . . . . 2 31.4 6.5 87.1 . . . . . . . . . . . . .
- 3 31.4 6.5 87.1 .. . . . . . . . . . . . .
4 31.4 6.5 8'. 1 ' 7.1 11.4 2.0 0.2 1.19 0.01 0.01 0.02 15.0 0.00 0.16 0.00 0.00 5 31.4 6.5 87.1- . . . . . . . . . . . . . 6 s 31.4 6.5 87.1 . . . . . . . .
. - _ ,0.02.
7 31.4~ 6.5 87.1 . . . . , . . . . . . .
~
8 31.4 6.5 87.1 6.9 11.0 2.6 0.2 1.38 0.01 - 0.03 16.8 0.00 0. l f. 0.00 0.00 9 31.4 6.5 87.1 . . . . . . __ . . . . . . . _ . - s 5 a 9
.m M
~
s. TABLE 3-14. HATER QUALITY DATA COLLECTED FROH LAKE Af 04A AIO THE HASTE HEAT TREATHEt(T FACILITY (LAG 00ftS) DURItG SEPTET 1BER.1981. DEPTH T Et1PE R- DISSOLVED PERCENT Pit ALKAL- TURB- tal3 NO3_H 0-PO4 H_PO4 T PO4 504 CU FE PB 214 ATURE OX)GEtt SATURATION Il4ITY
- IDITY tG/L NG/L t1G/L NG/L NG/L t1G/L NG/L FIG /L t1G/L 11G/L C HG/L NG/L IITU CACO 3 STATION -- LAGOOH 2 0 30.0 6.5 85.2 7.3 11.0 1.4 . . . . . . . . . .
1 28.6 6.4 81.7 . . . . . . . . . . . . . 2 27.9 6.4 80.7 . . . . . . . . . . . . . . 1, 3 27.6 6.4 80.2 . . . . . . . . . . . . . 4 27.3 6.3 78.5 . . . . . . . . . . . . .
~
5 27.0 6.3 78.1 7.1 11.2 2.0 . . . . . . . . . . 6 26.8 6.3 77.8 . . . . . . . . . . . . . 7 26.7 6.2 76.4 . . . . . . . . . . . . . 8 .26.7 6.1 75.2 . . . . . . . . . . . . . 9 26.6 6.0 73.8 . . . . . . . . . . . . . 10 26.6 5.9 72.6 7.1 11.5 1.4 . . . . . . . . . . 11 -26.5 5.9 72.5 . . . . . . . . . . . . . J. 2~ STATI0tl -- LAGOOH 3 7 0 26.8 6.6 81.5 6.9 11.0 3.4 0.1 0.47 0.02 0.03 0.05 16.0 0.00 0.09 0.00 0.00 1 26.6 6.5 80.0 . . . . . . . . . . . . . 2 26.4 6.5 79.7 . . . . . . . . . . . . . 3 26.2 6.4 78.2 . . . . . . . . . . . . . 4 26.1 6.4 78.1 . . . . . . . . . . . . . 5 26.1 6.4 78.1 7.1 11.0 1.9 0.1 0.69 0.02 0.02 0.04 15.0 0.01 0.62 0.00 0.00 6 26.1 6.4 78.1 . . . . . . . . . . . . . 7 26.0 6.4 77.9 . . . . . . . . . . . . . 8 26.0 6.4 77.9 . . . . . . . . . . . . . 9 26.0 6.5 79.1 . . . . . . . . . . . . . 10 26.0 6.5 79.1 7.0 10.3 2.1 0.2 1.01 0.02 0.00 0.02 16.8 0.00 0.14 0.00 0.00 11 26.0 6.4 77.9 . . . . . . . . . . . . . SIATIDH -- ELK CREEK 0 28.3 7.0 88.9 7.2 11.1 1.0 . . . . . . . . . . 1 28.1 7.0 88.5 . . . . . . . . . . . . . 2 27.4 7.1 88.7 . . . . . . . . . . . . . 3 25.8 7.4 89.8 . . . . . . . . . . . . . 4 25.4 7.4 69.1 7.1 11.2 1.8 . . . . . . . . . . 5 25.2 7.4 88.8 . . . . . . . . . . . . .
- 6 2%.8 7.4 88.1 . . . . . . . . . . . . .
7 24.6 7.4 87.8 7.2 11.5 1.4 . . . . . . . . . . 8 24.4 7.3 86.3 . . . . . . . . . . . . .
= l TABLE 3-14. HATER QUALITY DATA COLLECTED FR0t1 LAKE Att4A Alm THE HASTE HEAT TREAft1ENT FACILITY (LAC 00HS) DURIIG SEPTEf10ER,1981.
CU FE PB ZH DEPfH T Et1PER- DISSOLVED PERCENT PH AIKAL- TURB- t013 H03_N 0-PO4 H_PO4 T_PO4 504 OXYGEli SATURATION INITY IDITY MG/L F1G/L IG/L t1G/L HG/L t1G/L t1G/L t1G/L t1G/L ttG/L ATURE C t1G/L IG/L HTU CACO 3 STATION -- HILLPole CREEK 0 27.9 6.9 87.0 7.2 11.2 1.1 . . . . . . . . . . 1 27.2 6.9 85.9 . . . . . . . . . . . . 2 26.4 7.1 87.1 . . . . . . . . . . . . 3 25.8 7.1 86.1 . . . . . . 4 25.7 7.2 87.2 . . . . . . . . . . . . 5 25.4 7.2 86.7 7.2 11.1 1.0 . . . . . . . . . . 6 25.3 7.3 87.7 . . . . . . . . . . . . 7 25.2 7. 3 87.6 . . . . . . . . . 8 25.0 7.3 87.3 . . . . . . . . 9 24.9 7.2 85.9 7.2 10.7 1.4 . . . . . . . . . . l 10 24.7 7.0 83.2 . . . . . . . . . . . . 1 z-Ut I a M e l
TABLE 3-15. WATER QUALITY DATA COLLECTED FRON LAKE AtBIA API 3 THE WASTE HEAT TREATl1ENT FACILITY ILAGOOHS) DUR114G OCTOBER. 1981. DEPTil TEMPER- DISSOLVED PERCENT PH ALKAL- TUR8- NH3 HO3_H 0-PO4 N_PO4 T_PO4 504 . CU FE P6 Zie ATURE OX1GEtt SATURATIOil INITY IDITY NG/L, NG/L t1G/,L ttG/L t1G/L ttG/L NG/L; 11G/L tG/L ttG/L C nG/L
- nG/L NTU CACO 3 STATIDH -- DAN .
0 18.0 8.5 89.0 7.0 9.7 4.3 . . . . . . . . . . 1 18.0 8.5 89.0 . . . . . . . . . . . . . 2 18.0 8.4 88.0 . . . . . . . . . . . . . 3 18.0 8.5 89.0 . . . . . . . . . . . . . 4 18.0 8.5 89.0 . . . . . . . . . . . . . 5 18.0 8.5 89.0 . . . . . . . . . . . . . 6 18.0 8.5 89.0 . . . . . . . . . . . . . 7 13.0 8.5 89.0 . . . . . . . . . . . . . 8 18.0 8.5 89.0 7.2 9.1 4.2 . . . . . . . . . . 9 17.9 8.5 88.9 . . . . . . . . . . . . . 10 17.9 8.3 86.8 . . . . . . . . . . . . . 11 17.9 8.2 85.7 . . . . . . . . . . . . . 8, 12 17.8 8.2 85.6 . . . . . . . . . . . . . 23 13 17.8 8.2 85.6 . . . . . . . . . . . . . CN 14 17.8 8.2 85.6 . . . . . . . . . . . . . 15 17.8 8.2 85.6 . . . . . . . . . . . . . 16 17.8 8.2 85.6 7.0 10.3 5.8 . . . . . . . . . . 17 17.8 8.2 85.6 . . . . . . . . . . . . . STATIOli -- IHTAKE O 17.2 8.1 83.5 7.1 9.9 3.5 . . . . . . . . . . I 17.2 8.1 83.5 . . . . . . . . . . . . . 2 17.2 8.1 83.5 . . . . . . . . . . . . 3 17.2 8.1 83.5 . . . . . . . . . . . . . 4 17.2 8.1 83.5 . . . . . . . . . . . . . 5 17.2 8.1 83.5 7.0 10.1 3.8 . . . . . . . . . . 6 17.0 8.1 83.2 . . . . . . . . . . . . . 7 17.0 8.0 82.2 . . . . . . . . . . . . . 8 16.9 8.0 82.0 . . . . . . . . . . . . . 9 16.8 8.0 81.8 . . . . . . . . . . . . . 10 16.8 7.9 80.8 7.0 10.2 3.8 . . . . . . . . . . 11 16.8 7.9 80.8 . . . . . . . . . . . . . M F I
TABLE 3-15. HATER QUALITY DATA COLLECTED FR0t1 LAKE AttlA AfD THE HASTE HEAT TREATt1ENT FACILITY (LAG 00HS) DURItG DCTOBER, 1981. DEPTH T Et1PER- DISSOLVED PERCENT PH ALKAL- TURB- t513 Hol_N 0-PO4 H_PO4 T_PO4 SO4 CU FE PB ZH ATURE OXTGEll SATURATION IHITY IDITV NG/L NG/L t1G/L NG/L t1G/L FIG /L ttG/L ttG/L NG/L IG/t C FG/L NG/L HiU CACO 3 STATION -- RT 208 BRIDGE O 16.8 8.3 84.9 7.2 9.7 3.2 . . . . . . . . . . I 16.8 8.2 83.9 . . . . . . . . . . . . . 2 16.8 8.2 83.9 . . . . . . . .
- 3 16.7 8.2 83.7 . . . . . . . . . . . . .
4 16.7 8.2 83.7 . . . . . . . . . . . . .
~
5 16.6 8.1 82.5 7.2 9.4 2.9 . . . . . . . . . . 6 16.6 8.0 81.5 . . . . . . . . . . . . . 7 16.1 7.9 79.7 . . . . . . . . . . . . . 8 16.1 7.9 79.7 . . . . . . . . . . . . . 9 16.0 7.9 79.5 . . . . . . . . . . . . . 10 16.0 7.9 79.5 7.2 10.6 4.0 . . . . . . . . . . 11 15.9 7.9 79.3 . . . . . . . . . STATION -- HORTH AISM ARN Y 0 15.9 8.9 89.4 7.2 11.1 4.0 . . . . . . . . . . I 15.7 8.8 83.0 . . . . . . . . . . . . . 2 15.7 8.7 87.0 . . . . . . . . . . . . . 3 14.8 8.7 85.4 7.2 11.6 3.5 . . . . . . . . . . 4 14.6 8.6 84.0 . . . . . . . . . . . . . 5 14.6 8.4 82.1 . . . . . . . . . . . . . 6 14.4 8.2 79.8 7.3 12.7 5.1 . . . . . . . . . . 7 14.4 6.6 64.2 . . . . . . . . . . . . . STAT 10!I -- PANUta:EY ARN O 35.3 8.7 86.3 7.3 11.9 4.2 . . . . . . . . . . 1 15.3 8.7 86.3 . . . . . . . . . . . . . 2 15.2 8.5 04.1- . . . . . . . . . . . . . 3 15.2 8.4 83.1 7.4 10.2 4.5 . . . . . . . . . . 4 15.0 8.2 80.8 . . . . . . . . . . . . . 5 14.7 8.2 80.3 . . . . . . . . . . . . . 6 14.5 7.9 77.0 7.4 12.6 4.9 . . . . . . . . . . 7 14.4 7.1 69.1 . . . . . . . . . . . . . m
TABLE 3-15. WATER QUALITY DATA COLLECTED FR0tt LAKE Al#4A -AfD THE WASTE 61 EAT TREATHEllT FACILIf f (LAG 00tISI DURIllG OCTOBER. 1981. DEPTil T E HPER- DISSOLVED PERCEtiT PH ALKAL- TURB- 1813 fl03_N 0-PO4 t1_PO4 T_PO4 504 CU FE PS It4 ATURE OXYGEli SATURATIOtt lii!TT IDITY NG/L P1G/L F1G/L FIG /L t1G/L NG/L t1G/L FIG /L NG/L tt3/L C tt3/L NG/L tlTU CACO 3 STATI0t4 -- CotiTRARY CREEK BAY 0 16.2 8.3 83.9 7.2 9.1 2.3 . . . . *. . . . . . I 16.1 8.2 82.7 . . . . . . . . . . . . . 2 16.1 8.2 82.7 . . . . . . . . . . . . . 3 16.0 8.2 82.5 . . . . . . . . . . . . . 4 16.0 8.2 82.5 7.1 9.3 2.6 . . . . . . . . . . 5 15.9 8.2 82.3 . . . . . . . . . . . . . 6 15.9 8.1 81.3 . . . . . . . . . . . . . 7 15.4 8.0 79.5 7.2 9.2 3.6 . . . . . . . . . . 8 15.3 7.1 70.4 . . . . . . . . . . . . . STATIDH -- CollTRARY CREEK DRI
- l 2-0 15.9 8.5 85.4 7.1 9.5 2.6 . . . . . . . . . . j0 1 15.8 8.5 85.2 . . . . . . . . . . . . .
2 15.6 8.5 84.8 . . . . . . . . . . . . . 3 15.3 8.5 84.3 7.0 9.4 2.4 . . . . . . . . . . 4 14.7 8.5 83.2 . . . . . . . . . . . . . 5 14.6 8.3 81.1 . . . . . . . . . . . . . 6 14.4 8.3 80.8 7.0 8.2 3.6 . . . . . . . . . . STATI0t4 -- LAGOOl41 0 21.1 8.2 91.2 7.1 9.3 3.2 . . . . . . . . . . 1 21.1 8.2 91.2 . . . . . . . . . . . . . 2 21.1 8.2 91.2 . . . . . . . . . . . . . 3 21.1 8.2 91.2 . . . . . . . . . . . . . 4 21.1 8.2 91.2 7.0 9.6 3.9 . . . . . . . . . . 5 21.1 8.2 91.2 . . . . . . . . . . . . . 6 21.1 8.2 91.2 . . . . . . . . . . . . . 7 21.1 8.2 91.2 . . . . . . . . . . . . . 8 21.1 8.2 91.2 7.0 10.5 3.5 . . . . . . . . . . 9 21.0 8.2 91.0 . . . . . . . . . . . . . M
TABLE 3-15. WATER QUALITY DATA COLLECTED FRott LAKE Al84A Ate TiiE WASTE HEAT TREATHENT FACILITY ILAGO0 tis) DLRItG OCTOBER. 1981. J PERCENT PH ALKAL- TURB- t#13 HO3_H 0-PO4 N_PO4 T_PO4 SO4 CU FE PB ZH DEPTH TEMPER- DISSOLVED ATURE OXYGEN SATURATION ItlIT Y IDITY t1G/L NG/L NG/L FIG /L NG/L 81G/L 11G/L F1G/L NG/L F13/L C ttG/L NG/L ttTU CACO 3 STATION -- LAGOOH 2 0 20.3 8.4 92.0 7.0 9.3 4.1 . . . . . . . . I 20.3 8.4 92.0 . . . . . . . . . . . . . 2 20.3 8.4 92.0 . . . . . . . . . . . . .
. . . . l 3 20.2 8.4 91.8 . . . . . . . . .
4 20.2 8.4 91.8 . . . . . . . . . . . . . l 5 20.1 8.4 91.7 7.1 9.2 3.1 . . . . . . . . l
. . I 6 20.0 8.4 91.5 . . . . . . . . .
7 19.9 8.4 91.3 . . . . . . . . . 8 19.7 8.4 91.0 . . . . . . . . . . . . . 9 19.6 8.3 89.7 . . . . . . . . . . . . . 10 19.5 8.2 88.5 7.1 9.3 3.1 . . . . . . . . . . 11 19.5 8.0 86.3 . . . . . . . . . . . . . 2. z-STATION -- LAGOOH 3 T 0 19.1 8.3 88.8 7.0 9.2 2.9 . . . . . . . . . . I 19.1 8.3 88.8 . . . . . . . . . . . . 2 19.1 8.3 88.8 . . . . . . . .. . . . . . 3 19.0 8.3 88.7 . . . . . . . . . . . . .
, 4 19.0 8.3 88.7 . . . . . . . . . . . . .
( 5 18.9 8.3 88.5 7.0 9.3 4.0 . . . . . . . . . . ! 6 18.9 8.3 88.5 . . . . . . . . . 7 18.8 8.3 88.3 . . . . . . . . l i 8 18.8 8.3 88.3 . . . . . . . . . . . . . l 9 18.8 8.3 88.3 . . . . . . . . . . l 10 18.7 8.2 87.1 7.0 9.2 3.1 . . . . . . . . . . Il 18.6 8.2 86.9 . . . . . . . . . STATION -- ELK CREEK 0 19.4 8.6 92.6 7.2 14.4 2.4 . . . . . . . . . . I 19.3 8.6 92.4 . . . . . . . . . 2 19.2 8.5 91.2 . . . . . . . . . 3 19.1 8.5 91.0 . . . . . . . . . . . . 4 18.9 8.5 90.6 7.1 9.9 3.3 . . . . . . . . . . 5 18.6 8.5 90.1 . . . . . . . . . . . . .
- 6 16.9 8.5 87.1 . . . . . . . . . . . . .
7 16.1 8.6 86.7 7.1 9.9 3.1 . . . . . . . . . . 8 16.1 8.6 86.7 . . . . . . . . .
TABLE 3-15. HATER QUALITT DATA COLLECTED FRott LAKE Al#4A AND THE WASTE HEAT TREATitENT FACILITY (LAG 00HS) DURIts DCTOBER, 1981. DEPTH TEt1PER- -DISSOLVED PERCENT PH ALMAL- TURB- tet3 NO3_N 0-PO4 tt_PO4 T_PO4 504 CU FE PB ZH ATURE OXYGEll SATURATIDH INITY IDITY F1G/L 81G/L IG/L tE/L t1G/L ttG/L 81G/L FIG /L lG/L t1G/L C flG/L IIG/L HTU CACO 3 STATION -- NILLPote CREEK 0 38.9 8.6 91.7 7.1 9.4 3.3 . . . . . . . . . . I 18.8 8.6 91.5 . . . . . . . . . . . . . 2 18.8 8.6 91.5 . . . . . . . . . . . . . 3 18.7 8.5 90.3 . . . . . . . . . . . . . 4 17.9 8.5 88.9 . . . . . . . . . . . . . 5 17.7 8.5 88.5 7.1 9.4 3.3 . . . . . . . . . . 6 17.4 8.5 88.0 . . . . . . . . . . . . . 7 17.1 8.6 88.5 . . . . . . . . . . . . . 8 16.6 8.6 88.0 . . . . . . . . . . . . . 9 16.6 8.5 86.6 7.1 9.4 4.5 . . . . . . . . . . 10 16.5 8.5 86.4 . . . . . . . . . . . . . O e M Wem
.3 f
e i .
TABLE 3-16. HATER QUALITY DATA COLLECTED FR0tt LAKE AtNA AND THE WASTE HEAT TREATt1EHI FACILITY ILAG00ftS) DURING HOVE!1BER. 1981. DEPIH T EtlPER- DISSOLVED PERCENT PH ALKAL- TURB- tet3 H03_H 0-PO4 ff_PO4 T_PO4 504 CU FE PD IN A1URE OX1 GEN SATURATION IHITY IDITY #1G/L t1G/L P1G/L I1G/L FIG /L IC/L t1G/L tlG/L FIG /L ttG/L C ttG/L NG/L HIU CACO 3 STATION -- DAtt 0 16.1 9.2 92.8 6.9 8.4 4.3 . . . . .. . . . . . I 15.9 9.2 92.4 . . . . . . . . 6. . . . . 2 15.7 9.2 92.0 . . . . . . . . . . . . . 3 15.6 9.2 91.8 . . . . . . . . . . . . . 4 15.6 9.2 91.8 . . . . . . . . . . . . . 5 15.6 9.2 91.8 . . . . . . . . . . . . . 6 15.6 9.2 91.8 . . . . . . . . . . . . . . 7 15.6 9.2 91.8 . . . . . . . . . . . . . 8 15.5 9.1 90.6 6.9 8.4 4.2 . . . . . . . . . . 9 15.5 9.1 90.6 . . . . . . . . . . . . . 10 15.4 9.0 89.4 . . . . . . . . . . . . . 11 15.2 9.0 89.1 . . . . . . . . . . . . . .'. 12 15.1 9.0 88.9 . . . . . . . . . . . . . m 13 14 15.0 15.0 9.0 8.9 88.7 87.7 7 15 15.0 8.9 87.7 . . . . . . . . . . . . . 16 15.0 8.9 87.7 6.8 8.5 6.3 . . . . . . . . . . 17 , 14.9 8.9 87.5 . . . . . . . . . . . . . STAT 10tl -- 1HTAKE 0 13.9 9.3 89.5 7.0 8.7 4.3 . . . . . . . . . . I 13.8 9.3 89.4 . . . . . . . . . . . . . 2 13.7 9.3 89.2 . . . . . . . . . . . . . 3 13.3 9.3 88.4 . . . . . . . . . . . . . 4 13.6 9.3 89.0 . . . . . . . . . . . . . 5 13.6 9.3 89.0 6.9 8.5 5.0 . . . . . . . . . . 6 13.6 9.3 89.0 . . . . . . . . . . . . . 7 13.6 9.3 89.0 . . . . . . . . . . . . . 8 13.6 9.3 89.0 . . . . . . . . . . . . . 9 13.5 9.4 89.7 . . . . . . . . . . . . . 10 13.5 9.4 89.7 7.0 9.1 4.3 . . . . . . . . . . 11 13.4 9.4 89.5 . . . . . . . . . M M 9
TABLE 3-16. HATER QUALITT DATA COLLECTED FR0tt LAKE Al#4A Ate THE HASTE HEAT TREATHEHT FACILITY (LAG 00HS) DURIIG NOVEtBER. 1981. DEPTH TEMPER- DISSOLVED PERCENT PH ALKAL- TURD- t#f3 NO3_N 0-PO4 N_PO4 T_PO4 504 CU FE PO ZH AIURE OXfGEN SATURATION IllITY IDITY NG/L NG/L NG/L t1G/L t1G/L tlG/L t1G/L NG/L NG/L ttG/L C NG/L t1G/L HTU i CAC01 STATION -- RT 208 BRIDGE i 0 13.0 9.1 85.9 7.0 9.0 1.8 . . . . . . . . . . I 15.0 9.3 87.8 . . . . . . . . . . . . . 2 12.9 9.5 89.5 . . . . . . . . . . . . . 3 12.7 9.5 89.1 . . . . . . . . . . . . . 4 12.7 9.5 89.1 . . . . . . . . . . . . . 5 12.7 9.4 88.2 6.9 8.4 3.2 . . . . . . . . . . 6 12.7 9.5 89.1 . . . . . . . . . . . . . 7 12.7 9.5 89.1 . . . . . . . . . . . . . 8 12.7 9.5 89.1 . . . . . . . . . . . . . 9 12.7 9.5 89.1 . . . . . . . . . . . . . 10 12.7 9.5 89.1 7.0 9.6 4.2 . . . . . . . . . . 11 12.7 9.5 89.1 . . . . . . . . . . . . . -. m STATIDH -- HORTH Alt 4A ARN f 0 12.0 10.8 99.8 7.1 12.2 4.3 . . . . . . . . . . 1 11.5 10.8 98.6 . . . . . . . . . . . . . 2 11.2 10.8 98.0 . . . . . . . . . . . . . 3 11.1 10.6 95.9 7.1 12.4 5.3 . . . . . . . . . . 4 11.0 10.6 95.7 . . . . . . . . . . . . . 1 5 11.0 10.5 94.8 . . . . . . . . . . . . . 6 11.0 10.5 94.8 7.2 12.9 1.9 . . . . . . . . . . 7 11.0 10.5 94.8 . . . . . . . . . . . . . STAT 10tl -- PANUHKEY ARtt 0 12.0 9.9 91.4 7.0 13.0 3.9 . . . . . . . . . . 1 11.6 9.7 28.8 . . . . . . . . . . . . . 2 11.3 9.6 87.3 . . . . . . . . . . . . . 3 11.2 9.6 87.1 7.1 13.2 7.3 . . . . . . . . . . 4 11.2 9.5 86.2 . . . . . . . . . . . . . 5 11.2 9.5 86.2 . . . . . . . . . . . . . 6 11.1 9.5 86.0 7.1 12.8 5.5 . . . . . . . . . . 7 11.1 9.3 84.2 . . . . . . . . . . . . . M d
l l TABLE 3-16. HALER QUALITY DATA COLLECTED FROH LAKE AtalA Atc THE WASTE HEAT 1REATHEllT FACILITY E LAGOONS) DURIllG t10VEtBER, 1981. DEPIH T Er1PER- DISSOLVED PERCEtIT PH ALKAL-
- TURB- tell H03_H 0-PO4 N_PO4 T PO4 504 CU FE FD ZN A1URE OXYGEtt SATURATION lilITY IDITY t1G/L NG/L t1G/L NG/L NG/L NG/L NG/L NG/L NG/L ttG/L C 11G/L NG/L taTU CACO 3 .
STA110H -- CONTRARY CREEK BAY l 0 14.0 9.6 92.6 7.0 8.9 1.9 . . . . . . . . . . I 12.0 9.6 88.7 . . . . . . . . . . . . . 2 12.0 9.6 8S.7 . . . . . . . . . . . . . 3 12.0 9.6 88.7 . . . . . . . . . . . . . 4 12.0 9.6 88.7 6.9 7.5 3.0 . . . . . . . . . . 5 12.0 9.6 88.7 . . . . . . . . . . . . . 6 12.0 9.5 87.8 . . . . . . . . . . . . . 7 12.0 9.5 87.8 6.8 6.9 1.8 . . . . . . . . . . 8 12.0 9.5 87.8 . . . . . . . . . . . . . STATIDH -- C0tITRARY CREEK BRI s a m bak 0 12.5 9.9 92.5 6.8 6.8 1.5 . . . . . . . . . . i 1 12.0 9.9 91.4 . . . . . . . . . . . . . 2 11.8 9.9 91.0 . . . . . . . . . . . . . 3 11.1 9.9 89.6 6.8 3.5 1.8 . . . . . . . . . 4 11.0 10.0 90.3 . . . . . . . . . . . . . 5 11.0 9.8 88.5 . . . . . . . . . . . . . 6 11.0 9.5 85.8 6.6 5.8 3.8 . . . . . . . . . . 75.9 7 11.0 8.4 . . . . . . . . . . . . . STAT 10ll -- LAGOOH 1 0 21.8 9.1 102.6 6.9 9.1 4.4 . . . . . . . . . . I 21.7 9.2 103.5 . . . . . . . . . . . . . 2 21.7 9.2 103.5 . . . . . . . . . . . . . 3 21.5 9.2 103.1 - . . . . . . . . . . . . 4 21.5 9.2 103.1 7.0 8.6 3.8 . . . . . . . . . . 5 21.5 9.2 103.1 . . . . . . . . . . . . . 6 21.3 9.2 102.7 . . . . . . . . . . . . . 7 21.3 9.2 102.7 . . . . . . . . . . . . . 8 ' 21.3 9.2 102.7 7.1 8.7 4.0 . . . . . . . . . . 9 21.3 9.2 102.7 . . . . . . . . . . . . .
0 TABLE 3-16. NATLR QUALITY DATA COLLECTED FROH LAKE At04A AND THE MASTE HEAT 1REATitENT FACILITY E LAGOONS) DURItG P40 vet 2ER. 1981. DEPTH T Et1PER- DISSOLVED PERCENT PH ALKAL- TURB- taf3 HO3_H 0-PO4 H_PO4 T_PO4 S04 CU FE P8 2ti AIURE OXYCEli SATURATI0tl IHITY IDITY tG/L 11G/L IG/L tE/L ttG/L t1G/L ttG/L ttG/L ttG/L ltG/L C tG/L ttG/ L HTU CACO 3 STATI0tl -- LAGOOH 2 0 19.8 9.0 97.7 7.0 9.0 3.9 . . . . . . . . . . 1 19.8 9.0 97.7 . . . . . . . . . . . . . 2 19.8 8.9 96.6 . . . . . . . . . . . . . 3 19.0 8.8 94.0 . . . . . . . . . . . . . 4 18.8 8.8 93.7 . . . . . . . . . . . . . 5 18.1 8.7 91.3 7.1 8.3 4.0 . . . . . . . . . . 6 18.0 8.6 90.1 . . . . . . . . . . . . . 7 17.9 8.3 86.8 . . . . . . . . . . . . . 8 17.1 7.7 79.2 . . . . . . . . . . . . . 9 16.8 7.9 80.8 . . . . . . . . . . . . . 10 16.1 8.0 80.7 7.0 8.2 3.6 . . . . . . . . . . 1 i 81.5 ' 11 16.0 8.1 . v1 STATI0tl -- LAGOON 3 7 0 17.0 8.9 91.4 7.0 10.2 4.2 . . . . . . . . . . I 17.0 8.9 91.4 . . . . . . . . . . . . . 2 17.0 8.9 91.4 . . . . . . . . . . . . . 3 17.0 8.9 91.4 . . . . . . . . . . . . . 4 17.0 8.9 91.4 . . . . . . . . . . . . . 5 16.9 8.9 91.2 7.1 9.0 4.2 . . . . . . . . . . 6 16.9 8.9 91.2 . . . . . . . . . . . . . 7 16.5 8.8 89.5 . . . . . . . . . . . . . 8 16.2 8.8 88.9 . . . . . . . . . . . . . 9 16.1 8.6 86.7 . . . . . . . . . . . . . 10 16.1 8.5 85.7 7.0 8.5 3.9 . . . . . . . . . . I 11 16.1 8.2 82.7 . . . . . . . . . . . . . STAT 10!1 -- ELK CREEK 0 18.9 9.0 96.0 7.1 8.4 3.4 . . . . . . . . . . I 18.9 9.1 97.0 . . . . . . . . . . . . . 2 18.1 9.1 95.5 . . . . . . . . . . . . . 3 17.0 9.2 9 'e . 5 . . . . . . . . . . . . . 4 16.0 9.2 92.6 7.0 8.6 3.8 . . . . . . . . . . 5 15.1 9.1 89.9 . . . . . . . . . . . . .
-. 6 15.0 9.1 89.7 . . . . . . . . . . . . .
7 14.3 9.1 88.4 7.1 8.6 4.8 . . . . . . . . . . 8 14.0 9.0 06.8 . . . . . . . . . . . . . 5
TABLE 3-16. WATER QUALITY DATA COLLECTED FRON LAKE ATHA Ate THE WASTE HEAT TREAft1ENT FACILITY ELAG00HSD DURIHG HOVEtEER , 1981. DEPTH TEt1PER- DISSOLVED PERCENT PH ALKAL- 1 URB- IM3 H03_H 0-PO4 N_PO4 T_PO4 504 , CU FE PD ZH AIURE OXfGEli IHITY IDITY F1G/L. NG/L NG/,L NG/L NG/L NG/L t1G/L NG/L NG/L ttG/L SATURATION
- C t1G/L t1G/L HTU CACO 3 STATION -- MILLP0te CREEK 0 17.1 9.1 93.6 7.1 9.5 3.8 . . . . . . . . . .
1 17.1 9.1 91.6 . . . . . . . . . . . . . 2 17.0 9.3 95.5 . . . . . . . . . . . . . J 3 16.4 9.3 94.3 . . . . . . . . 4 16.0 9.3 93.6 . . . . . . . . . . . . . 5 15.5 9.2 91.6 7.1 9.0 4.0 . . . . . . . . . . 6 15.1 9.1 89.9 . . . . . . . . . . . 7 14.9 9.1 89.5 . . . . . . . . . . . . 8 14.5 8.8 85.8 . . . . . . . . . 9 14.1 8.8 85.1 7.0 8.4 4.2 . . . . . . . . . . 10 14.1 9.0 87.0 . . . . . . . . . . , W 8 l , 1 1 l l 1 l
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TABLE 3-17. HATER QUALITY DATA COLLECTED FRON LAKE AIRIA Ate THE WASTE HEAT TREATHEllT FACILITY (LAG 00tlS) DURING DECENBER, 1981. 3 DEPTH T EtlPER- DISSOLVED PERCENT PH A LKA L- TURB- t413 H03_H 0-PO4 N_PD4 T_PO4 50 '+ CU FE PB ZlG ATURE. OXICEtt SATURATION INITY IDITY NG/L NG/L FIG /L NG/L NG/L NG/L NG/L NG/L NG/L ttG/L C FIG /L ttG/L H10 CACO 3 4 STATION -- DAN i l 0 10.5 10.2 91.1 6.7 7.3 4.5 0.1 1.03 0.02 0.00 0.02* 8.0 0.01 0.15 0.00 0.01 1 10.5 10.2 91.1 . . . . . . . . . . . . . ! 2 10.5 10.2 91.1 . . . . . . . . . . . . . 3 10.5 10.2 91.1 . . . . . . . . . . . . . 4 10.5 10.2 91.1 . . . . . . . . . . . . . 5 10.5 10.2 91.1 . . . . . . . . . . . . . 6 10.5 10.2 91.1 . . . . . . . . . . . . . 7 10.4 10.2 90.9 . . . . . . . . . . . . . 10.4 10.2 90.9 6.7 7.7 4.8 0.0 1.05 0.04 0.00 0.02 8.8 0.00 0.14 0.00 0.01 10.4 10.2 90.9 . . . . . . . . . . . . . 1 . 10.3 10.2 90.7 . . . . . . . . . . . . . 11 10.3 10.2 90.7 . . . . . . . . . . . . . db 12 10.3 10.2 90.7 . . . . . . . . . . . . . j} 13 10.3 10.2 90.7 . . . . . . . . . . . . . e 14 10.3 10.2 90.7 . . . . . . . . . . . . . 15 10.2 10.2 90.4 . . . . . . . . . . . . . 16 10.1 10.2 90.2 6.8 8.5 5.0 0.1 1.23 0.03 0.00 0.03 8.4 0.02 0.13 0.00 0.03 17 10.1 9.8 86.7 . . . . . . . . . . . . . STAT 10H -- IIITAKE O 7.9 10.5 88.2 6.7 7.2 4.0 0.1 0.90 0.03 0.01 0.04 8.6 0.00 0.14 0.00 0.01 1 7.9 10.5 88.2 . . . . . . . . . . . . . 2 7.9 10.5 88.2 . . . . . . . . . . . . . 3 7.9 10.5 88.2 . . . . . . . . . . . . . 4 7.9 10.5 88.2 . . . . . . . . . . . . . 5 7.9 10.5 88.2 6.7 8.0 4.5 0.1 0.91 0.04 0.00 0.04 8.3 0.01 0.15 0.00 0.01 6 7.8 10.5 88.0 . . . . . . . . . . . . 7 7.7 10.5 87.7 . . . . . . . . . . . . . i 8 7.6 10.5 87.5 . . . . . . . . . . . . . 9 7.5 10.5 87.3 . . . . . . . . . . . . . 10 7.5 10.4 86.5 6.8 6.9 4.8 0.1 1.25 0.03 N N 8.2 0.01 0.15 0.00 0.00 M
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TABLE 3-17. HATER QUALITY DATA COLLECTED FRott LAKE AtalA AND THE HASTE HEAT TREATHEHT FACILITY (LAG 00t4Si DURIl4G DECEt2ES, 1981. DEPTH TEMPER- DISSOLVED PERCEl4T PH ALKAL- TURB- tell H03_N 0-PO4 H_PO4 T_PO4 504 CU FE PD 2 18 ATURE OXYGEll SATURATION IHITY IDITY NG/L t1G/L NG/L NG/L t1G/L ttG/L ttG/L ttG/L NG/L NG/L C NG/L NG/L HTU CACO 3 STATI0tl -- C0tiTRARY CREEK 8AY 0 5.6 10.9 86.5 6.3 4.7 2.8 . . . . . . . . . . 1 5.6 10.9 86.5 . . . . . . . . . . . . . 2 5.6 10.8 85.7 . . . . . . . . . . . . . 3 5.6 10.8 85.7 . . . . . . . . . . . . . 4 5.5 10.8 85.5 6.6 7.2 2.6 . . . . . . . . . . 5 5.5 10.8 85.5 . . . . . . . . . . . . . 6 5.5 10.8 85.5 . . . . . . . . . . . . . 7 5.5 10.8 85.5 6.6 6.2 2.8 . . . . . . . . . . . 8 5.5 10.8 85.5 . . . . . . . . . . . . . 9 STAT 10t4 -- CotiTRART CREEK DRI
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0 1 4.6 4.5 11.4 11.4 88.2 87.9 6.7 15.2 4.2 0.05 0.29 0.00 0.14 f 2 4.5 11.4 87.9 . . . . . . . . 3 4.2 11.4 87.3 6.4 5.6 2.9 . . . . . . 0.05 0.28 0.00 0.14 4 3.9 11.4 86.6 . . . . . . . . . . . . . 5 3.8 11.4 86.4 . . . . . . . . . . . . . 6 3.8 11.4 86.4 6.2 4.0 2.2 . . . . . . 0.06 0.36 0.00 0.18 7 3.8 11.3 85.6 . .. . . . . . . . . . . . STATIDH -- LAGOOH 1 0 16.6 10.6 108.0 6.7 7.9 4.9 0.1 0.77 0.02 0.01 0.03 7.7 0.01 0.15 0.00 0.01 1 16.5 10.6 107.8 . . . . . . . . . . . . . 2 16.5 10.6 107.8 . . . . . . . . . . . . . 3 16.5 10.6 107.8 . . . . . . . . . . . . . _ 4 16.5 10.6 107.8 6.6 8.0 4.8 0.1 0.84 0.03 0.00 0.02 7.8 0.01 0.14 0.00 0.00 5 16.5 10.6 107.8 . . . . . . . . . . . . . 6 16.3 10.6 107.3 . . . . . . . . . . . . . 7 16.3 10.6 107.3 . . . . . . . . . . . . . 8 16.3 10.6 107.3 6.5 8.6 4.6 0.1 0.82 0.02 0.11 0.13 8.0 0.01 0.18 0.00 0.01 9 16.3 10.6 107.3 . . . . . . . . . . . . . 3
TABLE 3-17. HATER QUALITY DATA COLLECTED FROM LAKE At#4A Ate THE HASTE HEAT 1REATHEllT FACILITY (LAGOONS) DURING DECEfEER, 1981. ALKAL- TURB- tal3 HO 3_H 0-PO4 H_PO4 T_PO4 SO4 CU FE PB 214 DEPTH TEMPER- 01SSOLVED PERCENT PH A1URE OXYGEH SATURATION INITY 101TY NG/L NG/L #1G/L NG/L NG/L t1G/L t1G/L NG/L NG/L !!G/L C ltG/L NG/L flTU CACO 3 STATION -- LAGOOH 2 0 13.5 10.1 96.4 6.7 7.0 4.3 . . . . . .
. . . . . l I 13.5 10.1 96.4 . . . . . . . .
2 13.4 10.1 96.2 . . . . . . . . 3 13.3 10.1 96.0 . . . . . . . . 4 13.2 10.1 95.8 . . . . . . . . 5 13.2 10.1 95.8 6.6 8.0 4.8 . . . . . . 6 13.1 10.1 95.6 . . . . . . . . . . 7 13.1 10.1 95.6 . . . . . . . . . . . . 8 12.8 10.1 95.0 . . . . . . . . . . . . 9 12.5 10.1 94.3 . . . . . . . . . . 10 12.5 10.1 94.3 6.6 9.0 4.6 . . . . . . . .
. l 11 12.0 10.1 93.3 . . . . . . . . . . .
m
' o, STATION -- LAGOOH 3 10.1 4.6 0.1 0.74 0.05 H H 8.6 0.00 0.13 0.00 0.01 0 11.7 92.7 6.6 7.6 1 11.7 10.1 92.7 . . . . . . . . . .
2 11.7 10.1 92.7 . . . . . . . . . 3 11.7 10.1 92.7 . . . . . . . . . . . . 4 11.7 10.1 92.7 . . . . . . . . . . 10.1 4.6 0.1 0.79 0.02 H H 7.6 0.01 0.11 0.00 0.01 5 11.7 92.7 6.6 8.6 6 11.7 10.1 92.7 . . . . . . . . . . . . 7 11.7 10.1 92.7 . . . . . . . . . . . . 8 11.7 10.1 92.7 . . . . . . . . . . 9 11.7 10.1 92.7 . . . . . . . . . . . 0.00 0.01 6.9 0.1 0.79 0.05 N N 8.6 0.01 0.16 10 11.7 10.1 92.7 6.6 8.5 11 11.7 10.1 92.7 . . . . . . . . . . . STATION -- ELK CREEK 0 11.1 10.4 94.1 6.6 8.5 4.4 . . . . . . . I 11.0 10.4 93.9 . . . . . . . . 2 10.9 10.4 93.7 . . . . . . . . . . . 3 10.9 10.4 93.7 . . . . . . . . . . . . . 4 10.9 10.4 93.7 6.5 7.9 3.7 . . . . . . . . . . 5 10.9 10.4 93.7 . . . . . . . . .
- 6 10.7 10.4 93.3 . . . . . . . .
7 10.3 10.4 92.4 6.5 7.4 3.8 . . . . . . I 8 9.4 10.4 90.5 .
=
N
j TABLE 3-17. HATER QUALITY DATA COLLECTED FROH LAKE AttlA Ate THE WASTE HEAT TREATt1ENT FACILITY (LAGO0f4S) DURItG DECEt2ER, 1981. DEPTH TEMPER- DISSOLVED PERCEtIT PH ALKAL- TURB- tel3 103_.fi 0-PO4 M_PO4 T_PO4 SO4 CU FE PD Zrt ATURE OXYGEti SATURATION Ittil f IDITT t1G/L t1G/L NG/L tG/L NG/L PG/L tG/L t1G/L tG/L t1G/L C t1G/L tG/L tlTU CACO 3 1 SI AT10ft -- MILLP0tm CREEK 0 11.0 10.4 93.9 6.5 8.0 4.3 . . . . . . . . . . I 10.9 10.4 93.7 . . . . . . . . . . .' . . 2 10.9 10.4 93.7 . . . . . . . . . . . . . 3 10.8 10.4 91.5 . . . . . . . . . . . . . 4 10.7 10.4 93.3 . . . . . . . . . . . . . 5 10.7 10.4 93.3 6.5 7.2 3.0 . . . . . . . . . . 6 10.6 10.4 93.1 . . . . . . . . . . . . . 7 10.6 10.4 93.1 . . . . . . . . . . . . . 8 10.5 10.4 92.9 . . . . . . . . . . . . . 9 10.3 10.4 92.4 6.6 8.6 4.7 . . . . . . . . . . 10 10.2 10.4 92.2 . . . . . . . . . . . . . e m O 4 I a 9 'I [ 1 4 1 l 1 -=* 1 1 i
~
I
TABLE 3-18. NAXIt1UN. NE AN. AfD MittIHUN VALUE5 FOR ALL PARAttETERS (WATER QUALITY. HUTRIENTS. NETALSI lif WATER SAMPLES FR0ft LAFE Affl4 Ate THE WAS1E HEAT TREAINENT FACILITY (LAG 00HS) BY STATI0t4 AtlD DEPTH FOR 1981. CU FE PB ZH STATI0tl TYPE 1ENP DO PERSAIDO PH ALK TURB tell H03_H 0_PO4 N_PO4 T_PO4 504 LAG 00tl 1 MAX 11.0 6.0 77.7 7.3 7.9 1.1 0.02 0.00 0.00 0.00 0.00 7.7 0.0 0.080 0.000 0.000 NEAN 22.9 8.9 99.3 6.9 11.7 3.3 0.11 0.71 0.02 0.03 0.05 11.2 0.0 0.137 0.000 0.003 HIH 33.6 13.1 120.5 6.5 18.0 8.5 0.21 1.38 0.05 0.11 0.13 16.8 0.0 0.180 0.000 0.010 LAGOOH 2 ttAX 6.7 2.9 33.4 7.4 7.0 1.4 . . . . . . . . . . HEAN 19.5 8.5 89.5 6.8 11.3 3.0 . . . . . . . . . . NIH 32.4 12.7 111.8 6.3 16.0 4.8 . . . . . . . . . . NILLPot40 CREEK NAX 4.0 3.0 38.6 7.2 7.2 1.0 . . . . . . . . . . HEAN 18.6 8.9 91.2 6.9 11.4 3.6 . . . . . . . . . . litti 31.5 13.1 ,109.5 6.5 15.0 17.0 . . . . . . . . . . EtK CREEK NAX 4.1 5.2 68.0 7.5 7.4 1.0 . . . . . . . . . I NEAN 18.8 9.1 93.5 6.9 11.4 3.0 . . . . . . . . . . MIti 32.0 13.2 110.8 6.5 14.4 5.5 . . . . . . . . . . LAGDOli 3 NAX 5.2 5.8 53.4 7.2 7.6 1.9 0.00 0.47 0.01 0.00 0.02 7.6 0.0 0.080 0.000 0.000 NEAN 19.0 8.7 90.0 6.8 11.3 3.7 0.10 0.66 0.02 0.07 0.09 11.1 0.0 0.157 0.000 0.015 Mitt 31.0 12.7 106.7 6.6 17.0 6.9 0.17 1.01 0.05 0.16 0.17 16.8 0.0 0.620 0.000 0.050 10RTH AtalA ARN NAX 3.8 0.4 4.9 7.3 11.1 1.9 0.00 0.11 0.01 0.01 0.08 6.8 0.0 0.110 0.000 0.000 8 NEAN 15.0 9.2 86.8 6.9 15.7 6.0 0.07 0.69 0.04 0.10 0.15 10.7 0.0 0.188 0.010 0.004 ~[ NIH 29.2 13.1 107.6 6.6 25.8 10.0 0.24 1.45 0.08 0.31 0.35 18.0 0.0 0.450 0.060 0.020 s PANUNKEY ARN HAX 4.1 0.0 0.0 7.4 9.3 2.4 0.00 0.31 0.01 0.00 0.05 6.9 0.0 0.100 0.000 0.000 NEAN 15.4 8.5 80.6 6.9 14.6 5.8 0.08 0.75 0.04 0.10 0.13 10.4 0.0 0.200 0.001 0.004 HIH 29.1 12.8 108.2 6.5 18.0 12.0 0.15 1.59 0.06 0.29 0.35 17.5 0.0 0.500 0.010 0.010 RT 208 DRIDGE NAX 3.3 0.3 3.7 7.2 7.8 1.5 . . . . . . 0.0 0.080 0.000 0.000 NEAN 15.7 8.9 84.9 6.8 11.7 3.1 . . . . . . 0.0 0.152 0.000 0.015 tlIN 29.0 13.8 103.2 6.5 15.0 6.8 . . . . . . 0.0 0.340 0.000 0.030 C0ti1RARY CREEK BRIDGE HAX 3.8 0.5 6.1 7.1 3.0 1.2 . . . . . . 0.0 0.200 0.000 0.000 NEAN 16.2 8.9 86.4 5.4 8.2 3.9 . . . . . . 0.1 0.324 0.000 0.164 NIH 29.1 13.6 104.6 3.9 15.2 20.0 . . . . . . 0.1 0.550 0.000 0.370 CollTRARY CREEK BAY t1AX 4.6 4.0 48.7 7.2 4.7 1.8 . . . . . . 0.0 0.100 0.000 0.030 l NEAN 16.9 9.0 89.2 6.7 9.5 2.7 . . . . . . 0.0 0.177 0.000 0.047 f l 11111 29.2 12.4 105.8 6.3 14.7 4.8 . . . . . . 0.1 0.330 0.000 0.060 Ill1 AKE HAX 2.9 0.9 11.0 7.4 6.9 1.9 0.03 0.49 0.00 0.00 0.01 8.2 0.0 0.050 0.000 0.000 NEAN 15.9 8.9 85.1 6.8 11.4 3.2 0.12 0.75 0.02 0.03 0.05 11.2 0.0 0.132 0.000 0.007 81I11 28.8 13.2 101.3 6.5 18.0 5.0 0.23 1.25 0.04 0.14 0.17 18.0 0.0 0.200 0.000 0.030 l DAM MAX 4.4 0.0 -0.0 7.2 7.3 1.9 0.00 0.35 0.00 0.00 0.02 5.9 0.0 0.100 0.000 0.000 ttEAN 36.5 8.3 00.6 6.8 12.1 4.6 0.11 0.83 0.03 0.06 0.03 10.9 0.0 0.167 0.000 0.009 l NIH 20.9 12.8 100.0 6.4 26.1 17.0 0.24 1.26 0.14 0.24 0.27 18.8 0.0 0.340 0.000 0.030 W
-162-TABLE 3-19. A COMPARISON OF MEAN ANION LEVELS (mg/l) IN LAKE ANNA WATER, 1975-1981 NH3 0-PO4 T-PO4 NO3 -H SO4 Station Year (mg71) (mg/1) (mg/l) (mg/1) (mg/1)
Lagoon 1 1978 0.07 0.0 0.04 0.23 9.9 1979 0.04 0.0 0.03 0.17 8.1 1980 0.02 0.0 0.02 0.20 8.4 1981 0.11 0.02 0.05 0.71 11.2 Ligoon 3 1975 0.411 0.02 0.10 0.226 9.0 1976 0.157 0.01 0.18 0.343 9.0 1977 0.100 0.02 0.37 0.205 10.4 1978 0.05 0.0 0.03 0.14 11.1 4 1979 0.02 0.0 0.03 0.17 8.4 1980 0.03 0.0 0.02 0.20 8.5 1981 0.10 0.02 0.09 0.66 11.1 North Anna Arm 1975 0.515 0.06 0.26 0.135 10.0 1976 0.135 0.06 0.19 0.790 10.0 1977 0.118 0.02 0.29 0.254 16.7 1978 0.06 0.0 0.04- 0.07 79 1979 0.03 0.0 0,07 0.11 5.7 1980 0.03 0.0 0.06 0.14 6.8 1981 0.07 0.04 0.15 0 95 10.7 Pamunkey Arm 1975 0.709 0.09 0.25 0.155 19.0 1976 0.215 0.05 0.21 0.750 9.0 1977 0.117 0.03 0 38 0.211- 18.8 1978 0.03 0.01 0.05 0.07 8.4 1979 0.07 0.0 0.06 0.16 6.0 1980 0.07 0.0 0.05 0.18 6.7 1981 0.08 0.04 0.13 0.75 10.4 Intakes 1978 0.07 0.0 0.03 0.18 10.0 1979 0.04 0.0 0.05 0.17 8.5 1980 0.02 0.0 0.03 0.23 8.0 1981 0.12 0.02 0.05 0.75 11.2 Dam 1975 0.504 0.02 0.12 0.114 10.0 1976 0.108 0.02 0.18 0.594 10.0 1977 0.067 0.02 0.39 0.237 8.7 1978 0.08 0.0 0.05 0.17 9.6 19 79 0.03 0.0 0.04 0.17 8.5 1980 0.04 0.0 0.02 0.20 8.3 1981 0. n 0.11 0.08 0.83 10 9
-163-TABLE 3-20 A COMPARISON OF MEAN HEAVY METAL LEVELS IN LAKE ANNA WATER FROM 1975-1981 Fe Cu Zn Pb Station Year (mg/1) (mg/1) (mg/l) (mg/1)
Lagoon 1 1975 0.37 0.01 0.01 0.04 1976 0.80 0.014 0.0 0.001 1977 0.53 0.0 0.0 0.0 1978 0.74 0.002 0.004 0.002~ 1979 0.38 0.0 0.0 0.0 1980 0.12 0.0 ' 0.001 0.0002 1981 0.14 0.0 O.003 0.0 Lagoon 3 1976 0.59 0.013 0.0 0.0 1977 0.82 0.0 0.0 0.0 1978 0.33 0.001 0.004 0.002 1979 0.48 0.0 0.0 0.005 1980 0.17 0.005 0.015 0.0001 1981 0.16 0.0 0.015 0.0 North Anna Arm 1975 2.17 0.01 0.0 0.03 1976 0.33 0.007 0.002 0.0 1977 0.45 0.0 0.001 0.0 1978 0.69 0.0 0.0 0.001 1979 1.33 0.0 0.0 0.001 1980 0.37 0.003 0.009 ND 1981 0.19 0.0 0.004 0.01 Pamunkey Arm 1975 1.20 0.02 0.01 0.02 1976 0.30 0.009 0.003 0.0 1977 0.60 0.0 0.0 0.0 1978 0.56 0.0 0.0 0.001 1979 0.73 0.0 0.0 0.0 1980 0.34 ND ND 0.0005 1981 0.20 0.0 0.004 0.001 Route 208 Bridge 1975 1.70 0.01 0.02 0.04 1976 0.70 0.021 0.0 0.003 1977 0.86 0.0 0.0 0.0 1978 0.42 0.001 0.003 0.001 1979 2.75 0.0 0.016 0.001 1980 0.32 0.005 0.018 0.0002 1981 0.15 0.0 0.015 00 Centrary Creek 1975 1.59 0.065 0.19 0.06 Bridge 1976 0.47 0.076 0.047 0.0 1977 1.67 0.059 0.030 0.0 1978 0.80 0.051 0.182 0.007 1979 1,48 0.180 0.229 0.001 1980 1.13 0.030 0.186 0.009 1981 0.32 0.10 0.164 0.0
~ ' ~
-164-1 TABLE 3-20. (Continued) A COMPARISON OF MEAN HEAVY METAL LEVELS IN LAKE ANNA WATER FROM 19 75-1981 Fe Cu Zn Pb Station Year (mg/1) (mg/1) (mg/1) (mg/1)
Contrary Creek 1976 0.19 0.043 0.022 0.0 Bay 1977 1.I1 0.036 0.019 0.0 1978 0.60 0.005 0.012 0.001 19 79 3.39 0.026 0.162 0.006 1980 0.64 0.008 0.'143 0.0020 1981 0.18 0.0 0.05 0.0 Intakes 1976 0.46 0.05 0.0 0.0 1977 1978 0.48 0.006 0.0 0.002 . 1979 0.62 0.0 0.002 0.0 1980 0.50 ND 0.008 ND 1981 0.13 0.0 0.007 0.0 Dam 1975 0.75 0.03 0.02 0.94 1976 3.24 0.015 0.002 0.004 1977 0.23 0.0 -0.0 0.0 1978 0.50 0.0 0.004 0.002 1979 0.57 0.001 0.001 0.0 1980 0.49 0.008 0.019 0.0003 1981 0.17 0.0 0.009 0.0 4 4 i t i
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JAN.' FEB. MARCH' APRIL L ( JUNE A 1 I e M AY JULY AUG. SEPT. OCT. NOV. DEC. Figure 3- 15. Annual temperature cycle for 1981 of Logoon I station in the W.H.T.F. Lake Anno,Vo. M, O '
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-178-6 Zoopiankton f
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-179-INTRODUCTION Zooplankters are an important and resilient component of aquatic systems. Their greatest contribution lies in their role as organic links in tha food chain. Most zooplankton rely in large part on the ability of phyto-plankton to convert solar energy into a usable source of food. In turn, they provide an additional source of inorganic nutrients to the autotrophic component through their excretory products. Equally important is their role as secondary producers converting energy into forms that can subsequently be utilized by facultative planktivores. For example, in a Missouri river reser-voir, imature yellow perch (Perca flavescens) feed primarily on calancid copepods (Martin et al. 1981). Black crappie (Pomoxis nigromaculatus) were found to dif ferentially utilize various zooplankton in lakes in Ontario (Keast 1968) and Wisconsin (Kromrey 1976) depending on the size of the fish and the relative abundance of the prey. Gerking (1962) found that bluegill (Lepomis macrochirus) fed on a wide variety of Invertebrates, largely Daphnia and midge (Chi ronomidae) Iarvae. Gizzard shad (Dorosoma cepedianum) in their early developmental stages (Cramer and Marzolf 1970) and to a lesser extent as adults (Baker and Schmitz 1971) are known to utilize zooplankton almost exclusively.
Since both striped bass (Morone saxatills) and largemouth bass (Micropterus salmoldes) have been shown to utilize gizzard shad as a predominant forage fish in Lake Anna (See Food Study Section), the relative importance of the zooplankton community is evident. In addition to supplying nutritional compo-ntnts to lake and reservoir dwelling fishes, other findings suggest the impor-tance of zooplankters flushed from a reservoir in downstream fish diets (Wal bu rg e t a l . 1971) .
4
-180-l The zooplankton in Lake Anna are a heterogenous assemblage of minute ;
l (80-400 u) organisms whose species abundance, composition and distribution in I the water column vary with respect to diurna! vertical migrations, seasonal population fluxes, and habitat specificities. Their adaptive strategies must be as diverse as the limiting factors which operate on them if they are to survive and reproduce. These factors include the amount and availability of
- food, concentrations of predators, destratification (Lackey 1973), water levels
] (Martin et al.1981), 'and changes in temperature. There is evidence of the ability of zooplankters to modify their life habits in response to such envi ronmental s tresses. For example, rotifers and cladocerans reproduce i
asexually (parthenogenesis) during the greater part of the year. However, 4 usually during the beginning of winter when conditions become less favorable, they are known to initiate a bisexual period which results in the production of dormant, highly resistant eggs (Pennack 1978). Kerfoot (1975) noted both the behavioral and morphological adaptations of Bosmina in response to copepod predation. Brooks (1965) hypothesized that the seasonally increased lengths of transparent head shields in Daphnia better enabled them to channel their growth into structures that would reduce their visibility to potential preda-tors. Zooplankton are traditionally thought of as cold-blooded Invertebrates I whose metabolic demands vary directly in response to increasing and decreasing l i environmental temperatures. However, some daphnids have been shown to exhibit varying degrees of metabolic compensation depending on acclimation temperatures (Armitage 1972). Bradley (1975) reported the importance of acclimation in j extending the tolerable temperature range of the copepod Eurytemora affinis along with evidence of potential adaptability to different thermal environ-i ments. . l l i _ ,___---m __ , _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ ~ . _ _ . , _ _ , _ _ . . _ _ _ _ _ . _ _ _ _ _ . _ _
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-181 -
The presen.t study was initiated to determine the impact, if any of the heated effluent on the zooplankton component of Lake Anna Reservoir and the VIste Heat Treatment Facility (W.H.T.F.) . In order to accomplish this, species abundance, composition, and distribution were determined with respect to station location and season. The most meaningful measure of any possible ef fects, whether they are due to the effluent or any other causative agent (s), is through an evaluation of long-term trends. Thus, several years of data from , past studies by others were also compared in an effort ,to assess the relative stability of the zooplankton communities. MATERIALS AND METHODS The zooplankton sampling program was carried out on a monthly basis at two stations in the U.H.T.F. and four in the Reservoir (Figure 4-1). Station location, sampling methodology, and the f requency of sampling employed in the present survey were similar to those used in previous surveys of the lake (Reed 1979, 1980, 1981). Study sites were the same in all years. The four Reservoir stations cover a relatively broad horizontal gradient ranging from the upper reaches to i i the dam. Stations NAR and PAM are located upstream in the North Anna River i and Pamunkey Creek arms, respectively. The intake (INT) station is about 100 m in front of the intake structures and the DAM station is about 50 m f rom the dam. The W.H.T.F. Is separated from the Reservoir proper by a series of three dikes. The Lagoon 1 station is situated in the W.H.T.F. nearest the source of thermal effluent adjacent to the first dike, and the Lagoon 3 station is located about 25 m from the third dike in the zone prior to immediate mixing between the two bodies of water. The field and laboratory methods used to obtain estimates of zoo-plankton abundance and species composition were also similar to previous
1 J
-182-studies. Niskin water bottles were used to extract a known volume (51) of water f rom the surface and 4 meter depths at all stations. Each 5 liter sample thus obtained was fiitered through a modified plastic funnel that had a " window" cut from its side and covered with 37 micron nylon mesh netting. The funnels were plugged and held in place on ring stand = during the filtration process.
The concentrated sample was then washed into see le jars and approximately 5 ml of " Club Soda" was added. About 2 ml of 25% buf tered formalin were introduced shortly thereaf ter as a final preservative.' Following a settling period of 2-3 days, all samples were further i ! reduced to a working volume of approximately 30 ml, and another 2 ml of 25% bufferes i formalin were added. Two 1 ml aliquots were extracted with a Hensen-Stemple pipett( from each sample Jar representing a station at a given depth. Each aliquot was transferred to a Sedgwick-Rafter counting cell which was then passed under 40 X magni ficat ion in 4 mm increments in order to cover the entire area of the cell. Counts of individual organisms (per ml) were obtained by averaging the two aliquots. All organisms were identified to the lowest feasible taxon. The zooplankton-free layer of sample liquid was drawn off and trans-ferred to a graduated cylinder by syringe following another settling period (2-3 days) af ter which all remaining zooplankton were put into 8 ml vials for long-term storage. Densities of Individual organisms (expressed as number / liter) were determined by the following formula. Number / liter = Volume Filtered where: Number /mi = average count of the two 1 mi aliquots Sample Volume = pipette volume removed + volume stored + graduated cylinder volume Volume filtered = 5 I capacity of Niskin water bottle
-183-Previous sampling schemes (Reed 1979, 1980, 1981) involved collecting zooplankton from more depths per station than occurred in 1931. Also, in contrast to those previous surveys when various stations were omitted in either .
January or February, data were obtained for all stations and months during 1981. Due to these differences, calculations of mean densities between study years for comparative purposes involved only the surface and 4 m depths and the months March through December for any given year. An ANOVA and Duncan's Multiple Ringe Test were run on zooplankton density data in an effort to determine if statistically significant differences existed with respect to station location and/or time of year. Since the density values used in the ANOVA matrix were
" pooled" totals of Individual species by station and depth, information on sptcles composition is invariably masked. For this reason, Coefficient of Community comparisons were computed based on the following formula.
Coefficient of Community = 2 S(A+B) SA*$B where: SA = number of species at the surface and 4 m depths, Station A, 1981. I j SB = number of species at the surface and 4 m depths, Station B, 1981. i S(A+B) = number of species in common at both Station A and Station B, 1981. l RESULTS l l The zooplankton collected in Lake Anna during 1981 were represented by 25 genera of.Rotifera, 6 genera of Cladoce a, and 2 suborders of Copepoda (Table 4-1) . Rotifera comprised the majority, 88%, of the numbers of zoo-plankton collected over the study year followed by the Copepoda, 9%, and
-184-Cladocera, 3% (Table 4-2) . Rotifers and copepods were more abundant annually in the North Anna River (NAR) and Pamunkey Creek (PAM) arms and the cladocerans were most abundant at the North Anna River arm. The Cladocera appeared to be less-variable with respect to abundance between stations than the other major groups.
The numerically dominant rotifers (ranked from increasing to decreasing densities) during 1981 were ?olyarthra, Keratella, Conochilus, Synchaeta, Asplanchna and were collected at all stations and depths. Vithout exception, all were more abundant on an annual basis in the North Anna River and Pamunkey Creek arms where total densities ranged from 30,617 for Polyarthra to 1,297 for Asplanchna. When considering the remaining four stations as two separate areas (i.e., intake and Dam = Reservoir proper; Lagoon 1 and Lagoon 3 = W.H.T.F.), the majority of the dominant rotifers (Polyarthra, Keratella, Synchaeta, and Trichocerca) were second most abundant annually in the W.H.T.F. This appears to be due to greater densities in Lagoon 3 Anuraeopsis is the only member of this group of organisms that was not collected in the W.H.T.F. In addition, most of the rotifers that were sparsely collected throughout the year were not found in the W.H.T.F. Both suborders of copepods (Calanoidia, Cyclopoldia) were collected at all stations and depths during 1981. Copepod nauplii, an early development stage within this group, were ranked third in overall total abundance (7,523) and were also collected in greater numbers in the North Anna River - Pamunkey Creek arms. The adult calanoid and cyclopoid copepods were likewise more abundant in the Reservoir arms. In contrast to the majority of dominant l rotifers, all three groups (adults and nauplii) were second most abundant ( in the Reservoir proper as opposed to the W.H.T.F. The cladocerans were numerically dominated by three individuals - I l Bosmina, Diaphanosoma, and Daohnia, respectively. All three were collected at all stations and depths with the exception of Daphnia which was not found i
-185-in the surface waters of Lagoon 1. Bosmina and Daphnia followed the general pattern of being more abundant annually in the Reservoir arms, and like the copepods were second most abundant in the Reservoir proper. 'Diaphanosoma, on the other hand, was found in slightly greater numbers in the W.H.T.F.
Most of the numerically dominar, rotifers previously mentioned were collected in all months (Table 4-4). Asplanchna and Anuraeopsis appeared to be the most seasonally dependent as they were found only from January to May and May to December, respectively. Peak densities for Polyarthra, Keratella, and Synchaeta occurred in January; Conochilus and Anuraeopsis in May; Asplanchna and Trichocerca in April and July. All of the dominant rotifers except Anuraeopsis were, in various months, more abundant in the W.H.T.F. than in the Reservoir proper. Polyarthra, Keratella, Conochilus, and Trichocerca exhibited this tendency for at least half of the year. These months included both the winter and summer extremes. Polyarthra, Conochilus, and Synchaeta were more abundant during the winter months (Polyarthra - January, February; Conochilus - January, February, March; Synchaeta - January, February) in the W.H.T.F. than in any of the other stations including the Reservoir arms. The calanoid and cyclopold copepods, along with the nauplit of each, i were collected in every month. In various months they were collected in slightly greater numbers in the W.H.T.F. as opposed to the Reservoir proper, but never l did their monthly abundance in the W.H.T.F. exceed that in the Reservoir arms. Bosmina was the only cladoceran collected in every month. Densities l l of Bosmina, Daphnia, and Diaphanosoma in the W.H.T.F. were periodically greater than in the Reservoir proper and the arms (Bosmina - October; Diaphanosoma -
- June, July, October) . Diaohanosoma was found only from May to October and i
I echieved peak densities in August. Coefficient of Community values (Table 4-5) indicated that the two W.H.T.F. stations had the most similar (C.C.= 0 92) soecies composition of all pairs of stations. The species composition at the Dam station appeared to consistently be most unlike that of the others. In general, the distribution
-186-of organisms within the W.H.T.F. appears to be slightly more homogenous compared to those distributions in Lake Anna Reservoir.
Few discernible trends existed with respect to total zooplankton densities between depths at any given station (Table 4-6). Surface densities at station NAR were greater in 7 of 12 months with no particul'ar seasonal pattern evident. In the Pamunkey arm surface densities were lower from January to June. Lagoon 1 exhibited slightly lower surface densitles f rom May to November whereas all other stations showed no trends. There was no indication that zoo-plankton preferentially " selected" a certain depth in either body of water during the day. Mean (combined depths) zooplankton densities by station and month during 1981 ranged from 3,713/l at station NAR in May to 33/1 at the Dam in October (Table 4-7). Both Reservoir stations, NAR and PAM, had consistently higher mean densities than the other stations throughout the entire year except for one instance in February when station NAR had the lowest recorded mean density (196/1) for that month. In addition, stations NAR and PAM both reached annual peaks in May of 3,713/1 and 2,383/1, respectively. Absolute changes in mean density values between months for these two stations were very similar, although relative degree of monthly increase or decrease varied. An exception occurred f rom July to August when mean densities at station NAR increased while at station PAM they decreased. The NAR station had higher mean densities 5 of 6 months during the first half of the year, whereas station PAM had greater mean densities 5 of 6 months during the second half of 1981. Overall, both stations exhibited relatively lower mean densities from June to December. Mean densities at the intake and Lagoon 1 stations peaked in February at 1,217/1 and 1,001/1, respectively. Inter-monthly comparisons of absolute changes between these two stations also reveal very similar density fluxes. Compared to the Lagoon 1 station, the intake station exhibited higher mean densities 8 of 12 months, the majority of these monthly dif ferences occurring
-187 -
from June to November. As in the Reservoir arms, their mean densities were highest from January to May and lowest throughout the rest of the year. The Dam and Lacoon 3 stations both reached their respective peaks in January when mean density values were 1,193/1 and 2,254/1. Absolute density changes from month to month were not as similar. Lagoon 3 exhibited higher mean densities 9 months out of the year and lower but near equal values in all others (April, July, September) . Lower mean densities for both stations were again evident from June to December. Two separate Duncan's Multiple Range Tests were used to determine if there were any statistically significant spatial or temporal differences in mcan zooplankton densities during the year (Tables 4-8 and 4-9). Several trends were apparent. Both stations, NAR and PAM in the Reservoir arms had significantly greater mean densities than all other stations from March to Dscember (Table 4-8). In 4 of those 10 months (March, May, July, and August) their mean densities were significantly different from each other. All of the remaining stations (i.e., excluding NAR and PAM)showed no significant differences during 9 months out of the year (March-July; September-December). The intake and Lagoon 3 stations, although most of ten not significantly dif ferent from the Dam or Lagoon i stations, exhibited consistently higher mean densities in 6 and 4 months out of the year, respectively. During the winter (January, February, and March) and early to mid-spring (April and May) mean zooplankton densities at all stations were generally higher. These relatively nigher mean drnsities within this time period were significantly different from other months varying wi th station location (Table 4-9) . Mean densities of the major groups of zooplankton (Rotifera, Cladocera, and Copepoda) derived by station from previous years (1979-1980) wsre compared to present data in an effort to access the relative stability
- - - , - - _ -- --y-
. 188-of the zooplankton communities in Lake Anna (Figure 4-2). When comparing the mean station densi ties throughout each year, the months January and February were omitted in order to equally represent the 3 years data since in 1979 and 1980 various stations were omitted f rom the sampling schedule due to ice cover on the lake. These data indicate that little relative change has taken place in the abundances of the major groups of zooplankton between stations during the last 3 years. From 1979-1980, there was a slight overall increase in the mean densities of total zooplanktoa at each station with the exception of Lagoon 3 which showed a slight decrease. From 1980-1981, there was an overall decrease in the mean densities of total zooplankton to levels slightly below both 1980 and 1979 at each station with the exception of the Reservoir arms which continued to show increasing mean densi ties. The variation from 1979-1981 appears to be primarily due to the relative abundances of the Rotifera. Several changes in the temporal distribution of the zooplankton were observed from 1979-1981 (Figure 4-3) . Monthly density data obtained in January and February of 1981 were included. All three major groups appeared to vary between months in a relatively similar manner, although the degree of variation among the Cladocera and Copepoda was much less. During 1979 there was a bi-modal distribution of the zooplankton most readily evident in the Rotifera which peaked in May and September. In 1980, this bimodal distribution of the Rotifera did not appear as strongly as in 1979 Instead, there was a unimodal peak of the Rotifera in May followed by a much smaller pulse in September. During 1981 the strong bimodal pulse of the Rotifera reappears; however, it occurs much earlier in January and May. DISCUSSION The dominant zooplankters within each major group that were found in past years continued to be collected in 1981. Minor differences in the species
l
-189-composition of the zooplankton in Lake Anna were observed. These differences ware due to the random collection in various years of some individuals that are generally not found in limnetic environments. For example, the rotifers Limnias, Platylas, and Rotaria that were collected in 1931 but not in 1978, 1979 or 1980 have been classified as littoral or periphytic genera that are sometimes, rarely or never collected in plankton samples (Pontin 1978). The cladoceran llyocryptus, also collected in 1981 but excluded from previous surveys, is generally benthic and rarely found in the upper layer of the water column (Edmondson 1959) . Cephalodella and Lepadella, both littoral or periphytic rotifers (Pontin 1978) were not found in the 1981 plankton samples as opposed to' past years.
Although additional depths and stations were sampled in 1979 and 1980 as opposed to 1981, similar percentages of the major zooplankton groups were observed in those years. From 1979-1981, there hao been a general increase in tha percentage of Rotifera (83% - 1979; 88% - 1980; 88% - 1981), a slight but progressive decrease in the Cladocera (1979 - 5%; 1180 - 4%; 1981 - 3%), and j fluctuating percentages of Copepoda (1979 - 12%; 1981 - 8%; 1981 - 9%). The Rotifera have consistently been the most dominant component of the lake zoo-plankton since studies were initiated here in 1973 Differences in species composition between stations were expected. A similarity comparison of species composition between all pairs of stations indicated that the W.H.T.F. stations were more homogenous. The greater species variability (lower homogeneity) that was evident when comparing all other pairs of stations may be directly attributed to the higher percentage of " rare" individuals collected at various stations in the Reservoir. Thus, the lower spscles variability in the W.H.T.F. is due to the fact that the rarer organisms collected in the Reservoir were not collec'.ed in the W.H.T.F. *Wi th the excep-
-190-i l
tion of Anuraeoosis, the dominant organisms collected in the Reservoir were also collected in the W.H.T.F. Mean densities of total zooplankton in the Reservoir arms were con-sistently greater than at the other stations throughout the year which has historically been the case since 1978. During 1981, mean zooplankton densities in the Reservoir arms were significantly greater than at ali other stations from March to Deceraber. Reed (1979) cites nutrient input as the responsible variable. The zooplankton in Lake Anna are, in large part, filter-feeders that depend on phytoplankton as a food source. Research has shown that algal (phytoplankton) growth in fresh water is c.learly linked to phosphorous which is frequently limiting in fresh water lakes and impoundments (Lee et al.1977). During 1981, phosphate levels were consistently greater in both Reservoir arms whereas ni trate levels in t's Pamunkey Creek arm were more variable (see Water Quali ty Section). Thus, phosphate enrichment appears to account for the relatively high concentration of zooplankton in the Reservoir arms. Mean densities of total zooplankton at the Lagoon I station and the intake station were compared in order to see if any differences existed directly between the heated and unheated areas. The abundance of zooplankton during most of the year appeared to be slightly depressed in Lagoon 1; however, during some of the colder months (January, March, and December) their relative abundance in Lagoon I was slightly higher. Thus , in the heated area directly adjacent to the power station the numbers of zooplankton were generally lower. These differences though were never statistically significant. In terms of species composition, none of the dominant organisms were restricted to either area, and changes in species composition when they occurred were similar and seemed to be seasonally dependent. In addition, the similar absolute fluctuations in densities between these two areas suggested that the power station did not act
t
-191-to critically alter the periods or cycles of zooplankton growth at Lsgoon 1 in the W.H.T.F.
The Lagoon 3 station located in the W.H.T.F. exhibited higher mean zooplankton densities throughout most of the year (9 of 12 months) than did the Dam station located adjacent to it in the Reservoir proper. In January and August tha mean densities at Lagoon 3 were significantly greater than a't the Dam. Thare were no do:ninant organisms restricted to either station. These findings again indicate that there has been no adverse power station impact on the zoo-plankton in the W.H.T.F. The single prominent finding in this study that has not occurred in any of the previous years, preoperational or postoperational, is the apparent
. temporal redistribution of peak growth periods. Simmons (1976) reviewed the sea-sonal growth cycles of zooplankton at separate stations in the Reservoir and W.H.T.F. during 1973,1974, and 1975 and noted that the most evident pattern to emsrge from these preoperational studies was that zooplankton densities tended to increase rapidly in March, peaked in April or Hay, and then fluctuated throughout the summer to a subsequent decline in September. Reed's (1979,1980, i 1981) postoperational data base for common stations and depths, including
! January and February indicates that peaks were generally found in May, June and July, in the winter (January, February) of 1981 there was an increase in the numbers of zooplankton not observed in previous years. The larger pulse in January was due primarily to the rotifers, Keratella and Po1Yar thra at stations NAR, PAM, DAM, and Lagoon 3 The largest single increase between years occurred in January (1981) at Lagoon 3 where mean densities (primarily Polyarthra) reached 2,254/1 as opposed to mean densities in 1979 and 1980 of 211.2/1 and 204.2/1, respectively. Since this temporal shift was also observed in the Reservoir arms which are believed to be well outside the range of power station
-192-influences, the increased densities during this time were probably the result i of some natural, random fluctuation. Simmons (1976) notes that it was not uncommon for rotifers in Lake Anna to pulse from a density of nearly zero to 1,000-1,500/1 within a few days. The typical March and April increase in zoo-plankton and the subsequent May peak did occur in 1981 as in past years. This is important since it is generally during this time when fishes in temperate regions initiate more active feeding coinciding wi tn the changing environmental conditions of spring (Lagler et al.1977). In addition, many of the young of the year fish begin appearing in Lake Anna at this time (see Ichthyoplankton Section) and the availability of plankton is important to their survival. Due to the general consistency of past evaluations of seasonal growth dynamics, it would be prudent to obtain additional data before generalizing about the direction of long-term seasonal trends.
Simmons (1976) indicated, af ter 3 years of research on Lake Anna, that the zooplankton community had generally stabilized with respect to the type, number, and seasonal growth cycles of the species present. During 1981, both l qualitative and quantitative evidence suggested that there had been no major change in the overall stability of the zooplankton community as a result of the operation of the North Anna Power Station. There has been neither any major change in the types of species found, nor any thermal (or other) restriction of dominant organisms to the Reservoir or W.H.T.F. In addition the monthly mean densities of zooplankton in the W.H.T.F. were comparable to, or signifi-cantly greater than, those stations directly adjacent to them in the Reservoir proper. The unusual winter increase of zooplankton that occurred in 1981 was not restricted to the W.H.T.F., and is thus not believed to be the result of any direct influence of power station operation.
-193-
SUMMARY
- 1. The zooplankton fauna of Lake Anna was dominated by the Rotifera which has '8=torically been the case since 1973
- 2. The two W.H.T.F. stations had the most similar species composi-tion of all pairs of stations. ,
3 There was no indication, based on surface and 4 m sample depths, that zooplankton preferentially " selected" one depth over another in either the Raservoi r or W.H.T.F.
- 4. The North Anna River and Pamunkey Creek stations exhibited consistently higher mean zooplankton densities throughout the year, and from M:rch to December their mean densities were significantly higher than all other stations.
5 The intake station had relatively higher mean zooplankton dtnsities than the Lagoon 1 station located adjacent to it in the W.H.T.F. for most of the year. These dif ferences were never statistically significant.
- 6. The Lagoon 3 station exhibited higher mean zooplankton densities throughout most of the year (9 of 12 months) than the Dam station located adjacent to it in the Reservoir proper, and in January and August the mean dnnsities at Lagoon 3 were significantly higher. .
7 All stations exhibited relatively lower zooplankton densities bsginning in June and lasting through December.
- 8. Comparative data indicated that the annual abundance and the parcent ccmposition of the major groups of zooplankton between stations during the last 3 years has remained relatively stable.
9 In the winter of 1981 there was an increase in the number of zooplankton not observed in previous years.
\
-194-
- 10. During 1981 both qualitative and quanti tative evidence suggested '
that there had been no major change in the overall stability of the zooplankton community as a result of the operation of the North Anna Power Station.
i c
-195-LITERATURE CITED Armitage, K. B. 1972. Completion Report: Environmental physiology of freshwater planktonic Crustacea. The University of Kansas Water Resources Research Institute, Kansas.
Btker, Ci D. and E. H. Schmitz. 1971. Food habits of adult gizzard and threadfin shad in two Ozark reservoirs. Pages 3-11 Ifi Gordon E. Hall, editor. Reservoir fisheries and limnology. American Fisheries Society Special Publication No. 8. Bradley, B. P. 1975 Completion Report: Adaptation of copepod populations to thermal stress. The Universi ty of- Maryland, College Park, Maryland. Jrooks, J. L. 1959 Cladocera. Page 596 IN W. T. Edmondson, editor. Fresh-water Biology. John Wiley and Sons, Inc., New York, New York, USA. Brooks, J. L. 1965 Predation and relative helmet size in cyclomorphic Daphnia. Proceedings of the Natural Academy of Sciences'. 53:119-126. Cramer, J. D. and G. R. Marzol f. 1970. Selective predation on zooplankton by gizzard shad. Transactions of the American Fisheries Society. 99:320-332. , 1 Gnrking, S. D. 1962. Production and food utilization in a population of bluegill sunfish. Ecological Monographs. 32:31-78. Keast, A. 1968. Feeding biology of the black crapple, Pomoxis nigromaculatus. Journal of the Fisheries Research Board of Canada. 25(2):235-297. Ke r f oo t , W. C. 1975 The divergence of adjacent populations. Ecology. 56: 1298-1313 i Kromrey, G. 1976. Distribution and feeding of pumpkinseed (Lepomis gibbosus) and black crappie (Pomoxis nigromaculatus) In a power plant cooling l lake. M.S. Thesis. University of Wisconsin, Madison Laboratory of l Limnology, USA. Lackey, R. T. 1973 Ef fects of artificial destratification on zooplankton in ( Parvin Lake, Colorado. Transactions of the American Fisheries Society. 102(2):450-452. l l Lagler, K. F. , J. E. Bardach, R. R. Miller, and D. R. M. Passino. 1977 I chthyol ogy. Second edition. John Wiley and Sons, Inc. , flew York, USA. Lss, G. F., W. R., and R. A. Jones. 1977 Recent advances in assessing aquatic plant nutrient load - eutrophication response for lakes and impoundmen ts. Center for Environmental Studies occasional paper No. 14. University of Texas. Plano, Texas, USA.
-196-Martin, D. C. , L. J. Mengel, J. F. Novotny, and C. H. Walburg. 1981. Spring and summer water levels in a Missouri River reservoir Effects on age-O fish and zooplankton. Transactions of the American Fisheries Socie ty. 110:370-381.
Pennack, R. W. 1978. Fresh-water invertebrates of the United States. Second edition. The Ronald Press Company, New York, USA. Pon t i n , R. M. 1978. A key to the British freshwater planktonic Rotifera. Freshwater Biological Association Scientific Publication No. 38. Reed, J. R. and Associates, Inc. 1979 Annual Report: Environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company. Richmond, Virginia, USA. 1930. Annual Report: Environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company. Richmond, Virginia, USA. 1981. Annual Report: Environmental study of Lake Anna, Vi rg inia. Prepared for Virginia Electric and Power Company, Richmond, Virginia, USA. Simmons, G. M., Jr. 1976. Final Report: Preoperational environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company. Richmond, Virginia, USA. Wal burg, C. H. , G. L. Kaiser, and P. L. Hudson. 1971. Lewis and Clark Lake tallwater biota and some relations of the tallwater and reservoir fish populations. pp. 449-467 IN Gordon E. Hall, editor. Reservoir fisherles and limnology. American Fisheries Society Special Publication No. 8.
i
-197-TABLE 4-1. LIST OF ALL ZOOPLANKTON COLLECTED AT LAKE Ah?iA, 1981.
Phylum Rotifera Class Digononta Order Bdelloidea Family Philodinidae Rotaria sp. Class Monogononta Order Flosculariacea Family Flosculariidae Limnias sp. Ptygura sp. Family Conochilidae Conochilus sp. Conochiloides sp. Family Hexarthridae Hexarthra sp. Family Testudinellidae Filinia sp. Testudinella sp. Trochosphaera sp. Order Collothecacea Family Collothecidae Collotheca sp. Order Ploima Family Synchaetidae Polyarthra sp. Synchaeta sp. Family Ploesomatidae Ploesoma sp. Family Gastropodidae Ascomorpha sp. Chromogaster sp. Gastropus sp. Family Trichocercidae. Trichocera sp. Family Asplanchnidae Asplanchna sp. Family Brachionidae Subfamily Brachioninae Anuraeopsis sp. Brachionus sp. Kellicottia sp. Keratella sp. Platyias sp. Subf amily Lecaninae Lecane sp. Monostyla sp.
1 198-TABLE 4-1 (Cont'd) Phylum Arthropoda Class Crustacea Subclass Branchiopoda Order Cladocera Family Bosminidae Bosmina sp. Family Daphnidae Daphnia sp. Ceriodaphnia sp. Family Holopedidae Holopedium sp. Family Sididae Diaphanosoma sp. Family Macrothricidae flyocryptus sp. Subclass Copepoda Order Eucopepoda Copepod nauptli Suborder Calanoidia Suborder 'Cyclopoldia s T. t Ng l' ,
i l l
-199-
'i TABLE 4-2. HEAN 200PLANKION DENSITIES (#/1) BY MAJOR GROUP. BY STATION, AT LAKE ANNA, VIRGINIA DURING 1981. 4 STATIONS g 3 L91 ku llE IM mt am Rotifers 278.9 497.8 1342.1 1193.6 314.5 25*,5 3886.4 88 Cladocera 12.6 16.8 33.7 17.0 15.5 19.9 115.5 3 Copepoda 34.9 38.8 127.6 106.8 47.1 36.5 391.7 9 l i
TABLE 4-3. 200 PLAT 4KTott COLLECTED BY STAT 10tl AfD DEPTH (S = SURFACE. H a 4 HETERS) DURItiG 1981 AT LAKE At#!A, VIRGIt4IA. LAGCCH 1 LAGOcti 3 HORIH AtalA PANUNKEY IHTAKE CAM S H S H S it S H S H S H ANURAEOPSIS SP. . . . . 572 839 146 149 . . . 10 ASC0t10RPHA SP. 34 6 11 6 47 74 9 71 . 6 . . ASPLAllCHt4A SP. 5 . . 5 121 93 653 429 25 . 11 . BOS!11t4A SP. 44 87 67 97 174 '44 148 113 106 104 164 203 BRAC!!I0tlUS SP. . . . . . 17 20 16 . . . . . CALAt40I01A 27 24 37 54 124 207 113 175 49 62 49 62 CERIDOAT:(t4IA SP. . . . . . 8 . . . . . . CHRottOCASTER SP. 5 6 6 . 6 . . . . 10 5 5 COLLOTHECA SP. . 27 22 43 54 82 77 60 51 53 17 11 Cult 0CilILOIDES SP. . . . . 14 71 56 102 12 . 5 . Cut!OCllILU3 SP. 19 49 122 68 1346 1332 929 1182 6 27 5 20 CCPEPOD 14AUPLII 287 339 385 368 1361 1200 966 1085 420 406 383 324 CYCLOPOIDIA 79 81 65 22 103 68 127 97 65 128 33 25 DAFilla!A SP. . 5 22 6 55 22 6 23 33 22 15 17 DIArilAt:0S0!1A SP. 53 109 78 132 51 147 28 90 51 55 45 27 FILIllIA SP. . . . . 59 58 17 11 . 6 . . GASTROPUS SP. 17 27 32 16 38 72 18 . Il 33 15 29 ilEXARTilRA SP. 27 5 11 11 . 12 . . 11 5 . . HOLOFEDIU:t SP. . . . . . 6 . . . . 5 . 8 ILYOCRYPTUS SP. . 4 . . . . . . . . . . E$ FELLICOTTIA SP. 6 13 5 . 80 114 66 353 20 16 5 . C) KERATELLA SP. 839 685 809 807 5180 4261 3740 4310 638 653 531 453 LECAttE SP. . . . . . . 5 . . . 5 . lit!!!I AS SP. . . . . . . . . . . 9 . 110t!OSTYLA SP. . . . . . 6 5 . . . . . PLATYIAS SP. . . . . . . . 18 . . . . PLDESOttA SP. . 10 . . . . . . . , . . 1 POLYAR1llRA SP. 2291 2031 4566 4650 8749 6903 6896 8068 2296 2924 2363 2261 PTv003A SP. 6 . 11 . 29 22 . 18 12 . . . ROTARIA SP. . . . 17 . . . 6 . . . . SillCllAETA SP. 294 112 316 203 514 511 358 377 251 236 192 93 TESluDIllELLA SP. . . . . . . . . . 32 . . 1RICit0CEPCA SP. 65 115 122 87 471 460 224 250 114 90 105 75 TEOCil0SFilALRA SP. . . . . . . . 6 . 6 . . i 10TAL 8 TAXA 17 19 In 17 21 25 22 23 18 20 20 15 10lAL ODISITY 4097 3735 6686 6593 19150 16930 14609 1703) 4171 4879 3965 3617
LAGOOH 1 LAG 00H 3 140RTH Ate:A pat 1UMKEY lllTAKE DAN S M S M S M S M S M S M ASPLANCHilA SP. . . . . . . . . 9 . . . BO*, nit 4A SP. 17 10 . . . 29 . 9 . . 9 10 CALtJ:01DIA . . . . . 77 . . . . . . CCil0CilILUS SP. . 49 30 51 10 19 10 18 . . . 10 COPEPOD tlAUPLII 42 20 71 10 156 202 114 125 36 38 47 33 CYCLOPOIDIA . . . 10 19 19 . 35 . . . . KELLICOTTIA SP. . 10 . . 19 48 . . . 9 . . KERATELLA SP. 58 59 302 162 2168 1251 1254 1439 36 75 161 124 lit *JIIAS SP. . . . . . . . . . . 9 . PLATYIAS SP. . . . . . . . 18 . . . . PLCE$r41A SP. . 10 . . . . . . . . . . POLYAHiliRA SP. 333 522 1855 1683 1011 779 475 1010 400 385 937 822 SYtaCHAETA SP. 67 69 192 132 49 43 29 89 82 47 123 76 TalCHOCERCA SP. 8 . . 10 49 . . . 9 9 9 10 TOTAL 8 TAXA 6 8 5 7 8 9 5 8 6 6 7 7 TOIAL DEllSITY 524 748 2449 2053 3460 2472 1881 2745 572 563 1296 1093 9 PJ O l o 1 M
TABLE O-4tC0ttT.h ZOOPLAtGTOM COLLECTED BY STATI0tle DEPTH, (S: SURFACE M Q NETER3) D 0 110 FELRUAftY.1981 AT LAKE AtcIA. VIRGIt:IA. LAG 00H 1 LAGOOtt 3 HORTH Allt4A pat 1UMKEY I!4TAKE DAM S N 5 N S H $ N S . It S N ASPLAllCHt4A SP. . . . . . . . 11 . . . . 00$NIllA SP. . . 5 6 25 . 12 . . . . . CALAt: OIDIA . . . . 25 . . . . . . . 11 . . 5 5 C01 CCli!LUS SP. . . . . . . . 22 43 49 30 87 43 36 77 71 38 35 9 COPEPOD tiLUPLII 22 11 50 12 108 28 . 13 5 . CYCLOFOIDIA . . DAPilHIA SP. . . 5 . 19 . . . . . . . KELLICOTTIA SP. . . 5 . . . . . . . . . . 355 108 151 94 62 56 438 528 159 151 65 28 KE2ATELLA SP. ' 858 297 1118 13C1 6 6 522 1529 714 914 385 249 POLYARit:RA SP. SYttCHAETA SP. 222 32 92 71 . . 12 44 148 189 50 5 1ESTUDIllELLA SP. . . . . . . . . . 32 . . 1ROCitOSPilAERA SP. . . . . . . . 6 . 6 . . 6 4 8 5 7 4 6 7 4 7 6 5 TOTAL 8 TAX 4 TOTAL DEt4SITY 1521 481 1436 1581 273 118 1128 2222 1091 1342 545 ~ 296 e N-O N 8 l l l l U M
VIRGINIA. LAGOOta 3 tlORTH AttlA PAMUt1 KEY Et4TAKE DAM LAC 00tl 1 S M S M S M S M S M S M 5 6 11 . . 11 . ASPLAllCHilA SP. . . . . . 47 11 11 5 34 17 16 22 17 11 5 22 E>0SititlA SP. ERACHIO!!US SP. . . . . . . 11 6 . . . . 6 . . 5 . . CALAttOIDIA . . . . . . COLLO1!!ECA SP. . . 11 11 . . . . . . . . C01:0Callt01 DES SP. . . . . . 6 . . . . . Cot:0CHILUS SP. . . SS 11 . . . . . . . 21 43 62 215 120 215 160 11 54 49 71 001'EPCD li1UPLII 21 27 16 22 5 22 65 5 . CYClor01DIA . . . . 6 5 23 6 17 11 . DArlit4IA SP. . . . . . FILit:IA SP. . . . . . . 6 . . . . . GASTROPUS SP. 5 . 16 6 . . . . . . . . HEXARIllRA SP. 27 5 5 11 . . . . . 5 . . 39 26 . 11 . . . KELLICOTTIA SP. . . . . . 6 16 5 16 11 1507 1106 231 353 6 11 . blRATELLA SP. 354 80 175 588 655 2206 1711 1617 1676 55 81 292 FOLYARIllPA SP. KOT/RIA SP. . . . 17 . . . . . . . SY!;CllAETA SP. 5 . . . 11 16 . . . . 5 . TT!!LiiCCERCA SP, . . . 6 28 . 6 . . 5 . 4 o W 8 6 10 10 9 7 9 8 7 8 7 5 TOTAL J TAXA 513 171 244 763 823 4070 3089 2118 2234 132 238 389 10TAL Dell 3!TY l l l 1 M
? .
t TABLE 4-CICO IT. I. 200PLAl8(TON COLLECTED BY STATION, DEPTH, IS: SURFACE. t):4 ftETERS) DUR1tl3 APRIL. 1981 AT LAKE ANNA. VIRGINIA. l.AGOOH 1 LAGOOH 3 HORTH AIR 4A PAMute(EY IHTAKE D AM - S M S t1 S M S M S, H S M ASPLANCHHA SP. . . . 5 16 . 614 383 6 . . . DOSitIHL SP. 5 42 33 16 16 % 30 27 50 55 107 86 CALAl'01DIA . . . . . . 6 . 6 . 10 . COLLO1HECA SP. . 5 6 . . . . . . 11 5 11 Cott0CHILUS SP. . . 11 . . . 77 81 6 21 . 6 COPEP00 NAUPLII 83 21 50 32 42 88 30 16 72 44 46 74 CYCL 00010IA 27 37 6 5 . . . . 33 22 15 6 OAPit!1IA SP. . 5 11 . . 26 6 . 11 6 15 11 GASTROPU3 SP. . 16 17 11 . . . . 31 33 15 29 liCX/.R11tRA EP. . . 6 . . . . . 6 . . . It0LOPEDILrM SP. . . . . . . . . .
. 5 .
KELLICOTTIA SP. . . . . . 10 8 . . . . . . l KERATELLA SP. 69 37 50 32 ' 510 1008 106 200 39 50 46 23 l'OLYMlitiRA SP. 360 360 622 493 1134 1136 767 1118 SS9 605 464 456 SYl!CilAETA SP. . 5 33 . 140 224 . . 22 . 10 11 TRIC110CERCA SP. . . 6 . 5 . . 5 . . . . TOTAL 8 TAXA 5 9 12 7 8 7 8 7 12 9 11 10 , 10TAL DEt4SITY 541 530 847 594 1872 2576 1634 1831 847 836 739 712 ra o e' j
~
l L_________ __ ___ ____ _ _ _ _ _s________
VIRGIti!A. LAG 00t4 1 LACColl 3 f1GRTH AtCIA PAMUNKEY IHTAKE DAM S M S tt S H S M S tt S M AtAJRAEOPSIS SP. . . . . 329 372 . . . . . . ASPLAtlCHt4A SP. . . . . 103 90 34 23 11 . . . 005tilllA SP. 6 . . .11 32 66 29 23 . 13 6 6 CALAt:010IA . . 6 . . 6 . . 5 6 . 6 COLLOTitECA SP. . . . . . 6 . . . . . . Cott0CllILUS SP. . . 17 . 572 534 371 524 . . . . COPEP03 !!AUPLII 50 66 44 54 49 72 34 40 69 82 40 22 CYCLOPOIDIA 17 . 6 . . . . . 5 19 . 11 DAPil!!! A SP. . . . . 5 . . 6 5 . . . DI AFilAt10SO:lA SP. 6 . . . . . . . 5 6 . .
. FILIllIA SP. . . . . 5 6 . . . . . .
GASil:0FUS SP. 11 11 . . . . . . . . . HEXARTilRA SP. . . . . . 12 . . . . . . KELLICOTTIA SP. 6 . . . 5 12 46 336 5 6 . . KERATELLA SP. 308 400 242 432 184 102 405 559 318 265 211 207 t10ttOSTYLA SP. . . . . . 6 . . . . . . POLYARillRA SP. 370 308 154 189 2597 1980 980 1197 276 372 143 185 E0ftRIA SP. . . . . . . . 6 . . . . Sit 1 CHAETA SP. . 6 . . . 24 68 40 . 6 6 4 o TRICl!0CERCA SP. 11 6 81 174 . 46 5 . m 4 TOTAL 3 TAXA 9 6 6 4 11 15 8 11 10 9 5 6 TOTAL DEtiS1TY 784 798 468 686 3%4 3462 1%6 2799 705 775 405 437 8 a.m
.m .4
TA3LE O-4(CollT. ). 200PLAtCITott COLLECTED BY STAT 10tf. DEPTH. (S: SURFACE. H:0 METERS) DURIt!G JUNE.1901 AT LAKE APRIA. VIRGIllIA. LAC 00H 1 LAC 00H 3 HORTH AHilA pat 1Ut1 KEY IllTAKE DAtt S H S H S H S H *:1 M S H ANURAEOPSIS SP. . . . . . . . 7 . . . . ASCOMORfttA SP. . . . . . . . . . 6 . . E,0SMIllA SP. . . . 12 32 55 5 7 . 17 6 12 CALAt:0!DIA 5 . . . 6 6 5 20 . 6 . . COLLOTitECA SP. . . . . . 6 5 27 . . . . Cott0CllILUS SP. . . 6 6 179 43 92 94 . 6 . . COPEF00 !!AUPLII 5 29 29 60 154 116 59 74 11 40 29 6 CYCLOPOIDIA . . 6 . 6 12 . . . . . . DIAPlfat20ScilA SP. 5 34 23 48 13 55 5 13 . 6 . 6 FILittIA SP. . . . . 19 . . . . . . . GASTROPitS SP. . . . . 38 67 . . . . . . HOLOPEDILMt SP. . . . . . 6 . . . . . . KILLICOTTIA SP. . . . . . . 5 . . . . . KERATELLA SP. 11 34 23 30 198 201 351 288 23 46 34 35 liot:0STYLA SP. . . . . . . 5 . . . . . POLYARTimA SP. 11 91 6 18 58 177 16 54 17 103 34 41 SYt! CHAETA SP. . . . . . 6 . . . . . . TRICllCCERCA SP. . 17 34 12 26 18 . 20 29 . 40 . e PJ o TOTAL # TAXA 5 5 7 7 11 13 10 10 4 8 5 5 m TOTAL DEllSITY 37 205 125 le6 730 769 Ss1 603 e0 228 142 99
.m 9 puu.
VIRGINIA. LAGOOH 1 LAGOOH 3 HORTH AtNA pat 1UTEEY IHTAKE DAM S #1 S t1 5 ft S H S M S M A!URAEOPSIS SP. . . . . 6 . . . . . . . ASC0t:0RPilA SP. 17 6 11 . 12 . . . . . . . COSl1lla SP. 6 . . . 6 18 30 11 . . . 29 BRACllICHUS SP. . . . . . 6 . . . . . . CALAtt31DIA . 11 6 17 . 12 12 29 13 19 16 17 COLLOTHECA SP. . . . . . . 6 . 34 6 . . cot 10CitILDIDES SP. . . . . . . 18 40 . . . . C02:OCHItu3 SP. . . . . 23 30 6 6 . . . . COPEPCD tlAUPLII 39 72 39 35 157 142 126 137 67 31 59 41 CYCLOFOIDIA . . . . . 6 6 . . 6 . . DIArilAt10SONA SP. 11 33 11 41 6 24 12 17 13 . 5 . FILINIA SP. . . . . 29 41 6 11 . . . . GASTROPUS SP. . . . . . . 18 . . . . . FELLICOTTIA SP. . . . . . . . . . . 5 . KERATELLA SP. 11 22 6 6 209 153 360 342 20 31 5 17 LECAttE SP. . . . . . . . . . . 5 . FOLYART;t9A SP. . 22 6 . 290 148 433 399 34 31 5 6 Sil:CitAETA SP. . . . . 75 24 6 . . . . . TRICit0CLRCA SP. 11 33 50 12 104 71 84 63 13 25 22 23 4 O w TOTAL 5 TAXA 6 7 7 5 11 12 14 10 7 -7 6 6 TOTAL DEt!SITY 94 198 127 110 916 673 1128 1054 194 149 124 133 Sum. 8
TAritE 4-4(CotiT.I. ZCOPLACToll COLLECTED BY STATION. DEPlH. IS*SLDFACE 71*0 t1ETERS) DURING AUCtf3T. 1931 AT LAKE AtatA. VIRGINIA. LAG 00ll 1 LAC 00H 3 il0RTH AtatA PANut: KEY IHTAKE DAtt S H S M S M S M S H S M ANURAEOPSIS SP. . . . . 34 129 77 71 . . . . ASC0ft0RPHA SP. 17 . . . . . . 6 . . . . BOSrtIttA SP. . . 6 . 29 56 . 12 12 . . . CALAl:0!DIA 17 6 17 6 11 11 5 30 6 . . 6 , CilR0!!3 GASTER SP. . 6 6 . . . . . . . . . , COLLOTilECA SP. . 18 6 32 . 6 . . 18 30 12 . Cott0CitILOIDES SP. . . . . 11 56 10 41 12 . . . C0110CHILUS SP. . . . . 257 196 163 118 . . . . COPEP00 ItAUPLII 29 31 33 SS 137 90 102 59 47 35 41 24 CYCLOFOIDIA 6 . 11 6 6 6 5 12 . . . . DAPiftlIA SP. . . . . . . . . . 6 . . DIAFtIAtt030t!A SP. 6 24 39 13 17 22 5 24 24 24 35 6 , FILIllIA SP. . . . . 6 11 5 . . 6 . . HCXt.RTHRA SP. . . . . . . . . 6 . . . KERATELLA SP. . . 11 26 86 50 66 65 12 . 6 12 LECAt:E SP. . . . . . . 5 . . . . . POLYARTHRA SP. 11 . 39 . 262 252 143 124 . 6 . 6 l'TYCtMA SP. 6 . 11 . 29 22 . 18 12 . . . Sit:Cif LETA SP. . . . . 6 6 . 6 . . . . e THICH3CERCA SP. 34 49 28 45 57 78 26 24 47 41 23 43 $
=
4 TOTAL 8 TAXA 8 6 11 7 14 15 12 14 10 7 5 6 TOTAL del:SITY 125 134 204 186 946 991 612 600 195 147 116 90 We O
if!RGINIA. LAG 00tl 1 L.AGOO!I 3 t! ORTH AIC4A pat 1Ut1KE Y IllTAKE D Ai".
.J S H S M S t1 S M S H S H 21 5 26 42 . . . 10 AtAJRAEOPSIS SP. . . . .
' ASCOl'ORPitA SP. . . . 6 10 47 . 26 . . . .
B05;tltlA SP. . 5 11 6 16 5 20 . 31 . . 5 - DR ACllI0taj3 SP. . . . . . 5 . . . . . . 31 31 20 15 20 5 5 CAttJ:0IDIA . . . Il . 5 . . . 10 5 5 CliRCIRGASTER SP. . . . . . COLLOTilECA SP. . . . . 5 21 10 . . . . . 5 . . 5 . CONCCIIILOIDES SP. . . . . . . . 4 C0!ICCHILUS SP. 5 . . . 31 26 10 26 . . . . 20 22 130 83 51 104 26 34 21 26 COPEPCD t!AUPLII . . 5 10 5 16 5 . . 5 CYCLOF010!A . . . . D AFit!!I A SP. . . . . . . . 5 . . . . 25 10 6 28 16 42 5 26 5 20 5 16 DIAPHAtlO30ftA SP. CASTR00US SP. . . . . . 5 . . . . . . KERATELLA SP. 5 . 6 11 62 99 56 88 15 . . . l 5 5 11 22 744 385 1153 442 71 29 26 10 FOLYART! IRA SP. SYtCilAETA SP. . . . . 130 31 66 62 . . . . TRICilOCERCA SP. . 10 6 . 62 26 56 21 10 5 . . i e PJ O 11 8 6 6 8 W 10TAL 8 TAXA 6 6 5 7 12 15 12 ' 50 61 39 105 1258 816 1479 868 178 118 68 83 TOTAL DEt!SITY 1 l l
.W.
de I
TABLE O-4(C0t4T.I. 200 PLAT 3 TON COLLECTED BY STAT 10H. DEPTH, ISzSuRFACE. Nz4 NETERS) DURING OCTCBER, 1931 AT LAKE ATHA. VIRGIllIA. LAGOOH 1 LAG 0014 3 tl0RTH Al#4A PAMUl1 KEY IllTAKE DAM S tt S M S tt S M S M S M AtREAEOPSIS SP. . . . . 11 . . . . . . . ASC0!!CRPilA SP. . . . . 6 8 . . . . . . Cott1 Illa SP. . 15 4 14 . . . 7 . 4 8 6 CALANOIDIA 4 . . 3 34 13 27 14 4 . 8 3 CERIODAFlulIA SP. . . . . . 8 . . . . . . CHROM 0 GASTER SP. . . . . 6 . . . . . . .
- COLLOTilECA SP. . 4 . . 17 8 11 11 . 4 . .
CollOCitILOIDES SP. . . . . . . 23 21 . . . . cot 10CHILU3 SP, . . . . 34 50 27 35 . 7 . . C01'EP00 NAUPLII . 4 15 . 162 76 84 119 . 4 4 6 CICLOFOIDIA . 4 11 . . 4 . . . . 8 . DIAPHAttOSONA SP. . 8 . 3 . 4 . . 4 . . . ILYDCRYPTUS SP. . 4 . . . . . . . . . . KELLICOTTIA SP. . . . . . . . 4 4 . . . FEPATELLA SP. . 11 . . 11 17 27 28 4 4 . . POLYARTHRA SP. 13 27 15 20 112 151 289 207 36 95 . 19 SYllCHAETA SP. . . . . 34 13 . . . . 4 . TRICHOCERCA SP. . . . . 17 21 11 4 . . . . e N e a TOTAL a TAXA TOTAL DEt4SITY 2 18 8 76 r4 e 4 4 41 11 442 22 Y4 498 8 10 448 5 50 6 116 5 30 4 35
?
M
.3
VYT.51HIA. LAG 00tl 1 LAGOOH 3 tORTH Ait1A PAtiR9(EY IHTAKE DAM S M S M S M S M S M S- M ANURAEOPSIS SP. . . . . 22 163 32 17 . . . . ASC0t10RFilA SP. . . . . . . . 3 . . . . D05t1IttA SP. . . 3 . . 3 . . . 3 3 3 , CALA!IQIDIA . 3 9 9 . 26 32 36 . 3 10 22 COLLOTHLCA SP. . . . . 16 17 16 7 . . . . Cat:0CHILO10ES SP, . . . . 3 10 . . . . . . COtt02 HILUS EP. 3 . . . 36 152 19 66 . . . . COPEP03 HAUPLII . 9 3 6 25 79 42 73 3 7 3 6 CYCLOPOIDIA . 3 . . . . . . . 3 . 3 DAPHillA SP. . . . 6 . 3 . 3 . . . . KELLICOTTIA SP. . . . . . . . 7 . . . . KERATELLA SP. 6 3 3 3 65 36 93 86 . 24 3 . POLYARTHRA SP. 113 161 93 124 202 73 419 234 56 269 43 43 Syt: CHAETA SP. . . . . 43 % 115 66 . . . . TRICHCCEECA SP. . . . . 3 7 6 7 . 3 . . TOTAL 3 TAXA 3 5 5 5 9 12 9 12 2 .7 5 5 TOTAL DEt1SITY 127 183 112 149 394 670 774 604 59 313 63 77 I
\
me l b I i t
TA8tE 4-4(COHT.). 200PLAIETotl CILLECTED BY STATIDH. DEPTH, IS* SURFACE., t1:4 f1ETERS) DUR1143 DECEt18ER.1961 AT LAKE At#44. VIRGItlIA. . LAGOOH 1 LAGOON 3 t:0RTH AtelA PANUNKEY IllTAKE DAtt S t1 S 11 S N S N S 11 S 11 AtlURAEOPSIS SP. . . . . 149 164 12 13 . . . . ASC0t10RfHA SP. . . . . 20 19 9 36 . . . . ASPLAt:CHilt SP. . . . . 3 3 . . . . . . C00t1 Illa SP. . 4 . . 3 . . . 3 7 ,3 . CRACH10tfUS SP. . . . . . 6 9 10 . . . . CAlft101DIA . 4 . 6 17 25 . 46 . 3 . 3 COLLOTHECA SP. . . . . 17 19 28 17 . 3 . . C0t40CilILUS SP. . . . . 224 282 155 215 . 3 . . COPEP00 ftAUPLII . 4 6 . 50 90 74 102 7 . 10 . CYCLOPOIDIA 3 . . . . 3 3 7 . . . . DAPittlIA SP. . . . . 3 3 . 3 . . . . KELLICOTTIA SP. . 4 . . 7 9 16 7 . . . . EERATELLA SP. . 4 . . 119 102 353 333 7 3 . . FOLVARTHRA SP. 102 63 61 65 129 105 78 79 53 36 35 40 SitiCitAETA SP, . . . . 26 25 62 69 . . . . TRICHCCERCA SP. . . . 3 40 65 40 56 . . . . TOTAL 8 TAXA 2 6 2 3 14 15 12 14 4 6 3 2 8 total DEllSITY 106 81 67 74 805 921 840 993 66 56 40 43 U, w e e t W
TABLE 4-5. COEFFICIENT OF Cott1 UNITY C0t1PARISCt4S EETWEEN ALL STATIONS FOR 200PLANTKON CCLLECTED DURING IT81 AT LAKE AltlA, VIRGIt4IA. STATION LAGOOta_1 LAGOOH.3 DAtt Il4TAKE PAfiUNKEY #1AR LAGOcti 1 1.00000 0.92683 0.76190 0.86364 0.72340 0.80851 LAGOOtt 3 0.92683 1.00000 0.78049 0.88372 0.78261 0.82609 DAtt 0.76190 0.78049 1.00000 0.77273 0.76596 0.80351 IHTAKE 0.86364 0.88372 0.77273 1.00000 0.81633 0.85714 pat 1UNKEY 0.72340 0.78261 0.76596 0.81633 1.00000 0.84615 HORTH AtM 0.80851 0.82609 0.80851 0.85714 0.84615 1.00000 , C. m ll .
TABLE 4-6. TOTAL tlUt18ER OF 200PLAHKToll T AXA ( T) AfD TOTAL DEtIS!!Y (D) BY ST AT10H. DEPTH. Aim NOllTH AT LAKE AtalA. VIRG1841A. DURiliG 1981. DEPIHS ARE 5 (SURFACE) Aft 0 N (4 NETERS). NOHIH LAG 00tl 1 LAGOON 3 HORTH Al#44 PANuta(Y IHTAKE DAN S H S N $ N S N S H S N T D T D T D T D T D T D T D T D T D T D T D T D 1 6 524 6 748 5 2449 7 2058 8 3480 9 2472 5 1881 8 2745 6 572 6 563 7 1296 7 1090 2 6 1521 4 481 8 1436 5 1501 7 273 4 118 6 1128 7 2222 4 1091 7 1342 6 545 5 296 3 8 171 6 244 10 768 10 823 9 4070 7 3089 9 2118 8 2234 7 132 8 238 7 389 5 E13 4 5 541 9 530 12 847 7 594 8 1872 7 2576 8 1634 7 1831 12 847 9 836 11 739 10 712 5 9 78'e 6 793 6 468 4 606 11 3964 15 3462 8 1966 11 2799 10 705 9 775 5 405 6 437
- 6 5 37 5 205 7 125 7 126 11 730 13 769 10 551 10 603 4 80 8 228 5 142 5 99 7 6 94 7 198 7 127 5 110 11 916 12 673 14 1128 10 1054 7 194 7 149 8 124 6 133 8 8 175 6 134 11 204 7 186 14 946 15 991 12 612 14 608 10 195 7 147 5 116 6 93 9 6 50 6 61 5 39 7 105 12 1258 15 816 12 1479 11 868 8 178 6 118 6 68 8 83 10 2 18 8 76 4 44 4 41 11 442 12 374 8 498 10 448 5 50 6 116 5 30 4 35 11 3 127 5 120 5 112 5 149 9 394 12 670 9 774 12 604 2 59 7 313 5 63 5 77 12 2 106 6 81 2 67 ,3 74 14 805 15 921 12 840 14 993 4 66 6 56 3 48 2 43 i'
Om
\
r i i
-215-a 1
TABLE 4-7. MEAN DENSITIES (#/1) 0F 200PIANKTON COLLECTED BY STATION AND MONIH AT IAKE ANNA, VIRGINIA DURING 1981. LCI LG3 NAR PAM M M January 636 2254 2976 2313 568 1193 February 1001 1509 196 1675 1217 421 March 208 796 3580 2176 185 451 April 536 721 2224 1733 842 726 , May 791 577 3713 2383 740 421 l l ' June 121 156 750 577 154 121 July 146 119 795 1091 172 129 August 130 195 969 610 171 107 September 56 72 1037 1174 148 76 October 47 43 408 473 83 33 November 154 131 532 689 186 70 ( December 94 71 863 917 61 46 l
., - - . . .-. . - . . . ,,---,,,_,-.,n ,,. _ . . . - - - . _ . - , - _ - - . . . . . , . , , , n. - - .-- , , , ,
t
-216-TABLE 4-8. DUNCAN'S MULTIPLE RANGE TEST ON Z00'LANKTON P DENSITY DATA, DATE BY STATION, LAKE ANNA, 1981. MEANS LWERSCORED BY THE SAME LINE WERE NOT SIGNIFICANTLY DIFFERENT (.05 level).
January INT LG1 DAM LG3 PAM NAR 567.4 636.0 1192.9 2253.9 -2312.8 2976.1 February NAR DAM LG1 LNT LG3 PAM l 195.3 420.6 1000.7 1216.7 1508.8 1675.0 March INT LG1 DAM LG3 PAM NAR 184.8 207.5 451.1 795.9 2176.0 3579.4 April LG1 143 DAM LNT PAM NAR 535.3 720.3 726.0 841.5 1732.5 2224.0 May DAM LG3 INT LG1 PAM NAR 420.8 576.7 739.9 790.8 2382.6 3712.8 June DAM LG1 INT LG3 PAM NAR 120.6 121.2 153.9 155.7 576.9 749.1 July LG3 DAM LG1 . INT NAR PAM 118.4 128.8 145.8 171.6 794.5 1091.3 August DAM LGl INT LG3 PAM NAR 106.8 129.8 171.1 194.6 609.9 968.7 I O _ y ._ . ., . _ . , _ --
l
-217-I TABLE 4-8. CONTINUED September 141 LG3 DAM INT NAR PAM 55.6 71.5 75.4 148.1 1037.4 1173.7 October DAM 143 LG1 INT NAR PAM 32.8 42.6 46.8 84.7 408.1 472.9 November DAM 143 LC1 INT NAR PAM 70.1 130.2 153.5 186.1 531.8 689.2 -
December DAM INT LG3 LG1 NAR PAM 45.7 61.1 70.8 S. .I 863.0 916.7
. - - - - - - - m - --. - - - - ---y * . - - , - - - , . - , , - , -,,-r= --- - - - - - - - ,- . .,---4 ----.--.w -
TABLE 4-9. DUNCAN'S MULTIPLE RANCE TEST ON ZOOPLANKTON DENSITY DATA. STATION BY DATE. !AKE ANNA.1981. FEANS UNDERSCORED BY 111E SAME LINE WERE NOT SICNIFICANTLY DIFFERENT (.05 level). OCT. SEPT. DEC. JUN. AUG. JUL. NOV. MAR. APR. JAN. MAY FEB. Lcl 46.8 55.6 93.1 121.2 129.8 145.8 151.5 207.5 535.3 636.0 790.8 1000.7 OCT. DEC. SEPT. JUL. NOV. JUN. AUv. MAY APR. MAR. FEB. JAN. 8, LC3 42.6 70.8 71.5 118.4 130.2 155.7 1 94.6 5_76.7 720.3 795.9 1508.8 2253.9 , FEB. OCT. NOV. JUN. JUL. DEC. AUG. SEPT. APR. JAN. MAR. MAY NAR 195.3 408.1 531.8 749.1 7 94.5 863.0 968.7 1037.4 2224.0 2976.1 3579.4 3712.8 OCT. JUN. AUG. NOV. DEC. JUL. SEPT. FEB. APR. MAR. JAN. MAY PAM 472.9 576.9 609.9 68 9.2 916.7 1091.3 1173.7 1675.0 1732.5 2176.0 2312.8 2382.6 DEC. OCT. SEPT. JUN. AUG. JUL. MAR. NOV. JAN. MAY A'R. FEB. INT 61.1 84.7 148.1 153.9 171.1 171.6 184.8 186.1 567.4 739.9 841.5 1216.7 OCT. DEC. NOV. SEPT. AUG. JUN. JUL. FEB. MAY MAR. APR. JAN. DAM 32.8 45.7 70.1 75.4 1 06.8 120.6 128.8 420.6 420.8 451.1 726.0 1192.9
e O *
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('E: s ss s.q - 9 b m rm _ _ _ _ _ _ = _.- mm _ DAll INT LG1 LG3 NAR Pall DAli INT LG1 LG3 NAR Pali DAll INT LGi LG3 NAR Pall SITE l l 79 l- ! SG l- ! 81 l YEAR LEGEND: GROUP M CLAD 0CERA I iCOPEPODA 'f ':1 R O T I F E R A i FIGUPE 4-2. COMPARISON OF MEAN DENSITIES ( /L) BETWEEH STATIOHS OF THE MAJOR 200FLANKTON CPOUPS (ROTIFERA.CLADOCERA. AND COPEPODA) COLLECTED AT LAKE ANNA. VA.. DURillG 1981.
3006-
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gg,a e + a - ?m -g\ A'~~,,.,.A + e'%% s % a-a m-m- c. -c -a g- L -a 9 7 7 7 7 7 7 7 7 7.7 8 8 8 8 8 8 8 8 8'8 8 8 8 8 8 8 8 8 8 8 8 8.8 8 1 9 9 9 9 9 9 9 9 9 9 0 0-0 0 0 0 0 0 0 0 G:0 I i i i l- i .I i i i i t GGGGG001 1 10000000001 1 i G Gi G G G G G O'C) t-1 I i 3456 890121234.56789012123456789.01 2 YEAR.AND MONTH' LEGEND: GROUP ' '
- CLAD 0CERA n - o- e C'O P E P O D A " -* ROTIFERA FIGURE 4-5. COMPARISON OF MEAN DENSITIES ( /L) BETWEEH MONTHS OF THE MAJOR ZOOPLANKTO!4 GROUFS (FOTIFERA. CLADOCERA. AND COPEPODA) COLLECTED AT LAKE ANHA, VA., DURING 1951.
-222-Benthic Macroinvertebrates I
I i r
i
-223-INTRODUCTION Aquatic macroinvertebrates are considered by many to be excellent indicators of environmental stress due to their lack of mobility, sensitivity to various environmental perturbations and extended life cycles (Hynes 1965; Cairns and Dickson 1971; Lehmkuhl 1979). For these reasons monitoring the benthic community is considered to be an integral part of any ecological evaluation.
The development of the benthos in newly impounded reservoirs has been poorly covered in the literature compared to fishery studies (Isom 1971). Baxter (1977) has reviewed the ecological investigations of young impoundments world-wide. Investigations of the benthos of newly formed reservoirs in the southeastern United States have been provided by Aggus (1971) and Isom (1971). Some of these man-made impoundments have been constructed to provide water for electricity generating stations and as such are subjected to varying thermal influences. Reactions of the Senthic community to thermal stress have been well documented (Banda and Proffitt 1974; Howell and Gentry 1974; Cairns 1976; Lehmkuhl 1979). The purpose of the macroinvertebrate sampling program in Lake Anna during 1981 was to provide data to assess the impact of the operation of the North Anna Power Station on the benthic community. METHODS AND MATERIALS A system of artificial substrates, initially designed and implemented by Voshell and Simmons (1977), was utilized to sample the benthic communi ty during 1981. Artificial substrate baskets were set at 2 m and 7 m depths at three stations in the Waste Heat Treatment Facility (W.H.T.F.) and three stations
. ._ . . - . . _ _ _ .m. __ _ ___ _. -, _ .
-224- l In the Reservoir'(Fig. 5-1). Each sample consisted of two replicate baskets from each depth at all stations. - Station descriptions are given by Reed (1981).
- Each basket consisted of four 10.2 cm squares of 3M Corporation No. 200.
. Conservation Webbing placed in a 2 quart ro ad plastic container with a lid. l These containers were 11.4 cm tall with a . diameter of 16 cm at the top and 13 5 cm at the bottom. A total of twenty-four holes, each with a diameter of 3 8 cm was cut in the top, bottom and. sides of each basket to allow-for. colonization of tne conservation webbing. I Each sampling station (Fig. 5-2) consisted of a line, termed the
" backbone", running perpendicularly from the shoreline to a depth of 7 meters.
- Two transect lines stretched perpendicularly from'the backbone line and followed l'
] contour lines at the 2m and 7m sample depths. The transect lines were supported 0.5 m or ress off the bottom by metal stakes set 5 m apart. These stakes l r also se'rved as markers for placement of the pairs of substrate baskets. Baskets were secured by one or more T-shaped wooden stakes. SCUBA was utilized for placement and retrieval of' substrate baskets. Sufficient nunbe rs of baskets for the entire year were put in place in September, 1980 and collected monthly beginning in November. Collections were not made in October to allow time for colonization of the substrates. New substrate baskets were again put in place in September,1981. When divers located the samples, they tilted back the T-shaped wooden stake and carefully placed the substrate into a muslin bag fitted with a drawstring. The bag was drawn closed and an overhand knot tied around the neck of the bag to insure against any loss of organisms. As divers reached the surface, the muslin bags containing the substrate baskets were placed in a large plastic can and transported back to the laboratory for processing. Care was taken to keep the bags a
! moist but not covered with water. Inundation could lead to an oxygen
- depletion and subsequent death of the organisms.
F 1
- , . - - . _ , . . _ . ~ . . _ . _ _ - . _ _ . _ . . _ . _ . _ _ . _ . . . - , . _ _ - . _ _ . _ , _ , .
l
-225-Contents of the collecting bags were washed through a 500 p sieve and the remaining contents were rinsed into e sorting tray. All organisms were removed and placed in 70% ethanol for preservation. Organism identification was carried out to the lowest possible taxon.
An All0VA and Duncan's Multiple Range Test were performed on macroinvertebrate densities to determine if a signi ficant dif ference existed between stations. Species coraposition di f ferences were compared at all stations, using the Coefficient of Community which was calc,ulated as follows: Loef f. of Comm. = 2 ' (A+B)! A + B where: f species in c mm n at both Stations A and B S ( A+ B) = 11 . S = !1 . spec es c Ilected at Station A A Sg = Ho. of species collected at Station B RESULTS During 1981, 80 different taxa were collected in North Anna in artificial substrate baskets-(Table 5-1). The most abundant macrobenthic organism collected in both the Reservoir and the W.H.T.F. was the Asiatic clam Corbicula fluminea_ (Table 5-2) . Other predominant organisms included the caddisflies, Cyrnellus sp. and Polycentropus sp. The most diverse fauna was found in the Chi ronomidae, wi th 38 different taxa being identi fied. The Chironomidae were well represented at most stations by the subfamily Tanypodinae, including Ablabesmyla parajanta, & tarella, Coelotanypus sp. and Procladius sp. The subfamily Chironominae members included Paratanytarsus sp. and Dicrotendipes neomodestus; the latter showed a distinct preference for the 2m substrate baskets. The most abundant representative of the subfamily Orthociadlinae was Psectrocladius sp. The only mayfly collected in any large l l
- , e y
-226-numbers was Hexagenia munda, which reached its greatest abundance at stations E (2m) and B (2m), but was never collected at either depth of station C.
The most abundant number of organisms was found at both depths of station C, and the largest number of taxa was found at the 2m depths of stations A and H. The major contributors to the large numbers found at station C were Corbicula fluminea and Cyrnellus sp. The large number of taxa collected at stations A (2m) and H (2m) were primarily due to members of the Chironomidae. Dicrotendipes neomodestus was the most abundant midge at station A (2m); the most f requently collected chironomid at station H (2m) was Coelotanyous sp. The lowest total number of organisms was found at the 7m depth of stations B and E. The lowest number of taxa occurred at both depths of station C, where 25 taxa were collected, followed by station B (7m), which yielded 27 different taxa. The number of taxa were less for the 7m samples than the 2m samples at all stations except C, where both depths had identical values. Stations A, C, and D showed a greater abundance at the 7m depth; however, more organisms were collected at the 2m depths at stations B, E and H. The number of taxa (diversity) and total abundance changed over the year at all stations (Table 5-3). All stations in the W.H.T.F. (A, B and C) plus D (2m) In the Reservoir had their highest diversity values in February. Stations D (7m) and H (2m and 7m) had their highest diversity values in March. The greatest number of taxa was collected at E (7m) in April, with E (2m) having the same highest value in March and AprII. The peaks in diversity values . are followed by varying values at all stations throughout the warmer months.
~
No scmples were collected in the Reservoir (stations D, E and H) in January due to Ice cover. Also, no collections were made in the W.H.T.F. (stations A, l B and C) during July due to SCUBA equipment malfunction. The Chironomidae
l
-227-exhibit a reduction in nu.:ber at stations A, B and C in March (Figure 5-3) and are reduced at station D, E and H in April . The Trichoptera, comprised primarily of ths Polycentropodidae, decreased in March at all stations except D, which exhib-Ited very little change in abundance (Figure 5-4). Slight increases occurred in April at all stations except H which continued to show a decrease. Major reductions in numbers occurred in May at all stations except H. Corbicula fluminea was reduced at all stations in the March samples, but then increased at all W.h.T.F. stations until June, when numbers were decreased at stations .
A and C. The populations of C., fluminea increased in May in the Reservoir stations until November. During 1981, however, C., fluminea numbers at the sampling stations in the Reservoir rarely reached the abundance found in stations A and C of the W.H.T.F. Species composition was least similar at stations C and H, which had a communi ty coef ficient of 0.27273 (Table 5-4). Station H appeared to be unique, with only one community coefficient greater than 0 50000 (stations H and E). Stations B and D were most similar, with a coef ficient of 0.68750, followed by stations B and E with 0.68571. Duncan's multiple range tests were performed on station macrobenthic densities for each month in 1981. Except when collections were not made in the W.H.T.F. during July, station C showed the highest mean density of organisms during each monthly sample (Table 5-5). Station A was second in mean density during all months except June and August. During August station A was only significantly different frem station C. Densities at station C were significantly di fferent (0 5 level) from all other stations during all months except June and i December. In June, station C was significantly different from all stations except D. However, in December, station C was significantly different only from f station H. Only stations B and E were not significantly different during any month.
-228-When Duncan's multiple range test was performed on monthly macrobenthic densities for each station (Table 5-6), station E was found to have no significantly different densities throughout the year. Varying monthly similarities in statistical significance were found at other stations with no observable trends. At all stations, November had consistently low mean densities, while February had consistently high mean densities.
D I SCU SS ION The number of taxa collected in 1981 (80) increased over the number collected in both 1980 (43) and 1979 (48). The large increase is probably due to the fact that some organisms collected in the past two years were not Idet.tified beyond family levels (Reed 1980, Reed 1981) . Station C, which had the highest abundance of,macrobenthic organisms, is characterized by a firm sandy substrate and a noticeable current at both 2 and 7 meter depths. The current at station C is stronger than at any other station due to this station's location near the mouth of the canal connecting Lagoon 2 and Lagoon 3 of the W.H.T.F. The physical characteristics of the station are reflected in the high numbers of both Cyrnellus sp. , usually an Inhabitant of large rivers (Wiggins 1977), and Corbicula fluminea, which prefers sandy substrates (Sinclair and Isom 1961). The habitat at station C is well suited for both organisms and their relatively high numbers apparently reduced the colonization of the substrates by a more diverse fauna. Cyrnellus sp. was the dominant Trichoptera at most stations; however, large numbers of Polycentropus sp. were collected at stations B and E. These stations are characterized by a fine silt substrate and a less noticeable current. Although station B is located in Lagoon 2 of the W.H.T.F. , the current is less noticeable because of the width of Lagoon 2 at this point. Polycentropus sp. is better adapted than other members of the Polycentropodidae to live in slower moving waters due to the organisms ability to oxygenate its retreat by abdominal
l -229-undulations (Wiggins 1977). These two stations also yielded high numbers of i the burrowing mayfly, Hexagenia munda, which exhibits a strong preference for soft mud substrates (Edmunds et'al. 1976). Fluctuations in total abundance and the number of taxa collected occurred during the warmer months due to insect emergence. Some of the Chironomidae are bi- or multivoltine (Oliver 1971), and each species will exhibit species specific emergence patterns (Rosenberg et al. 1980). The Polycentropodidae exhibited thel; greatest reductions during May in the V.H.T.F. and during June in the Reservoi r, i t appears that emergence may be accelerated in the W.H.T.F. by approximately one month. The low number of taxa and decreased abundance dur ing November and December might be explained by the short amount of time since substrate placement in October. However, this was not evident in the previous year (Reed 1981). The number of taxa and total abundance were generally higher at the l 2m depths, probably due to oviposition habits of adult aquatic insects particularly among the Diptera which prefer to lay their eggs among shoreline
-vegetation (Merri t and Cummins 1978) .
Several trends are conspicuous in the development of the benthos of Lake Anna when comparing past data. Prior to 1978, Polycentropus sp. was i recorded as the dcminant caddis fly in Lake Anna (Reed 1979). Af ter 1978, the more rheophilic Cyrnellus sp. became more abundant (Reed 1980), possibly due to increased current created by station operation. This would also explain slight reductions in Hexagenia munda which prefers lentic habitats with soft substrate. , The Asiatic clam, Corbicula fluminea, since its first collections in 1979 l j (Rced 1980), has increased in abundance to become the most dominant macrobenthic organism for the past two years. Sickel (1973) has suggested that C. fluminea mty compete with native molluscan fauna; this may explain why no Sphaeridae were collected during 1981.
-230-During 1978 and 1979, the Chironomidae were the dominant group of organisms collected in Lake Anna (Reed 1979, Reed 1980). However, their
~ abundance was weighted by two collecting stations in the upper arms of the Reservoir. These two stations were eliminated prior to 1981. Unlike past years, the Chironomidae were examined on a species level and showed a d8 verse representation of the family. Overall, the benthic community in Lake Anna seems to be a diverse fauna, and relatively stable for the past 2 years. An exception is the rapid increase in the Asiatic clam population, particularly in the W.H.T.F. Although temperature in the W.H.T.F. may influence an early insect emergence, no deleterious effects on populations have been observed. Current seems to be more of a delineating physical parameter, and only in the W.H.T.F.
SUMMARY
- 1. Corbicula fluminea, the Asiatic clam, was the dominant macro-benthic organism collected in both the Reservoir and the W.H.T.F. for the second consecutive year.
- 2. Cyrnellus sp. was the most abundant Trichoptera in artificial substrate baskets, particularly in the W.H.T.F.
3 The Chironomidae were examined on a species level during 1981, and found to comprise a diverse element of the Lake Anna macrobenthic fauna.
- 4. Station C was the most unique of all stations sampled, primarily due to the channelization at that point in the W.H.T.F.
5 Any elevated temperature which could be a result of operation of the North Anna Power Station does not seem to be adversely affecting the benthic macroinvertebrate community.
_. . =, - . _ i
-231-SPECIAL STUDIES: EKMAN DREDGE COLLECTION OF CORBlCULA FLUMINEA INTRODUCTION The' Asiatic clam, Corbicula fluminea, was first collected at florth 1
Anna Power Station in the Waste Heat Treatment Facility (W.li.T.F) during July 1979 (Reed 1980). Since that time, the organism has quickly increased in numbers 3 to become the dominant macrobenthic organism collected in artificial substrate ! baskets (Reed 1981). Due to the fluclear Regulatory Commission's concern over possible biofouling in the intake water system of the power station by
,C_. fluminea (!!RC IE Bulletin 81-03), regularly scheduled Inspections have been implemented at various points along the cooling water pathway, inspections to
! date have Indicated no problem with biofouling. Although population numbers of C., fluminea in the Reservoir and W.H.T.F. are available from the substrate baskets on a monthly basis, these numbers could be misleading as they do not necessarily reflect natural population densities. The Asiatic clams collected in the baskets tend to be numerous and small in size I due to the mesh size of the substrate material, the limited mobility of the adult and the propensity of substrate baskets to concentrate organisms (Voshell and Simmons 1977). To assess natural substrate population densities and age class 1 l distributions, dredge samples were taken in July 1981, in both the Reservoir and ' I the W.H.T.F. METil005 A!!D MATERI ALS Ekman dredge samples (0.023 pd ' grab) were collected at six stations In the Reservoir and W.H.T.F. (Figure 5-1). All but one station, the intake area, l were located near existing artificial substrate stations. Two replicate samples consisting of eight grabs each (0.184m ) were collected at each station. Subs t ra te
.raterial was washed through a 500 u sieve bucket; all remaining material was brought back to the laboratory where all C. fluminea were removed and preserved i
in 700 ethanol. Samples depth varied from 2 to 7 me te rs . Clams were sorted and counted according to size classes given by Cherry et a!, (1020).
-232-RLS'JLTS Overall abundance for g fluminea was greater in the W.H.T.F.
than in the Reservoir (Table 5-5); however, the greatest density for any station was found at the Dike 3 cove station (616.2 / m ) Size c lass I clar s corrprised LO.2% of the total population at this station, the greatest density within any size class (267.6 / m ). The two other Reservoir stations, Intake and Confluence, also yielded high percentages in size class I; however, the numbers collected were much less than Dike 3 cove station. All U.ll.T.F. samples showed a greater abundance of, clams than the two upper Lake stations (Intake and Confluence). The majority of the population of each W.H.T.F. sample was size class 11 Lagoon 1 and Lagoon'2 sarples yielded a low number of size class I (2.7 and 8.1 / m respectively); however, the number of size class I increased greatly in Lagoon 1 (118.4 / m). DISCUSSION The highest density of C. fluminea found in Lake Anna (616.2 / m)- approximates the density found in summer samples by Oresler and Cory (1980) in the Potomac River (665 / m )2but does not approach the numbers found by 2 Cherry et al.. (1980) in the New River during summer (3,508.0 / m). Two factors probably affecting both the abundance and size class distribution of C. fluminea are current and temperature. Unlike many members of the freshwater Pelycypoda (Barnes 1980), the Asiatic clam produces free swimming larvae which do not attach to the gills of fish at any stage in the life cycle (Si nclai r and Isom 1961). Therefore, currents could easily carry recently hatched planktoni larvae from Lagoon 1 to Lagoon 2, Lagoon 3 and possibly Dike 3 cove, depending on the length of this period in the life cycle. Possibly, some larvae could originate in the Reservoir and survive entrainment by the North Anna Power Station and subsequently be discharged into the W.H.T.F. Zooplankton have
-233-baen shown to have good survival rates af ter entrainment (Marcy et al . 1978).
The upper incipient lethal temperature for C. fluminea is 34 C (Mattice and Dye 1976). Temperatures in the North Anna Power Station discharge canal . approached 34 C in the summer months of 1981 and may have affected size class I individuals. A summer die-of f was reported in .a power station discharge canal which ' reached 40 C (Larimore and Tranquill t 1977). Temperature was probably also responsible for the lack of clams in the upper Reservoi r stations. Both Mattice and Dye (1976) and Cherry et al. (1960) report a lower incipient thermal tolerance of 2 C for C. fluminea. Temperatures at both Intake and Confluence sampling stations reached minimums between 2 C and 3 C during the winter months of 1981. It should be noted that the size class increments utilized here have been associated with year classes elsewhere; however, thermal influences probably invalidate such an association for the clams collected in the V.H.T.F. (Larimore and Tranquilli 1977; Cherry et al . 1980). The population of C. fluminea has been on the increase since 1979, and it is not known whether the population has peaked. At present there have been no biofouling problems from the Asiatic clam at the North Anna Power Station; in fact, the lowest population density found was located in front of I l the intake screens. If sufficient water velocity is maintained at every point i along the cooling water pathway, no biofouling problem should arise. If the planktonic larvae and young clams which might pass through the intake screens ! are allowed to settle out of the water column, a problem could arise from shell dsbris as clams grow in size and eventually die.
4
-234--
LITERATURE CITED 4 4 Aggus, Larry-R. 1971. Summer benthos in nearly flooded areas of Beaver Reservoir during the second and thfrd years of filling 1965-1966. Pages 139-152 in,Gordon E. Hall, editor. Reservoir fisheries and limnology. American Fisheries Society Special Publications No. 8. Barnes, Robert D. 1980, invertebrate zoology. W. B. Saunders Co., Philadelphia, Pennsylvania, USA. i Baxter, R. M. 1977 Environmental effects of dams and impoundments. Annual Review of Ecological Systems. 8: 255-283 Benda, Robert S. and Max A. Proffitt. 1974. Effects of thermal effluents on fish and invertebrates. Pages 438-447 in,J. Whitefield Gibbons and Rebecca R. Sharitz, editors. Thermal ecology. Technical Information j Center, Office of Information Services, U. 'S Atomic Energy Commission,
- Springfield, Virginia, USA.
i Cherry, Donald S. , John H. Rodgers, Jr. , Robert L. Graney and John Cairns, Jr. 1980. Dynamics and control of the asiatic clam in the River, Virginia. The Virginia Water Resources Research Center, Bulletin 123 Blacksburg, - Virginia, USA. ! Dresler, Paul V. and Robert L. Cory. 1980. T he asiatic clam, Corbicula j fluminea (Muller), in the tidal Potomac River, Maryland. Estuaries. 3(2): 150-151. ! Edmunds, E. F. , Jr. , S. L. Jensen and L. Berner. 1976. The mayflies of North and Central America. University of Minnesota Press, Minneapolis, Minnesota, USA. ' Howell, Freddie G. and John B. Gentry. 1974. Effects of. thermal effluents i from nuclear reactors on species diversity of aquatic insects. Pages 562-571 in J. Whitefield Gibbons and Rebecca R. Sharitz, editors. Thermal ecology. Technical Information Center, Office of Information Services, U. S. Atomic Energy Commission, Springfield, Virginia, USA. Hynes, H. B. N. 1965 The significance of macroinvertebrates in the study of mild river pollution. Pages 235-240 in, Biological problems in water pollution. United States Public Health Service Publication. Cincinnati, Ohio, USA. Isom, Billy G. 1971. Effects of storage and mainstream reservoirs on benthic macroinvertebrates in the Tennessee Valley. Pages 179-191 in,Gordon E. Hall, editor. Reservoir fisheries and limnology. American Fisheries Society Special Publication No. 8. Larimore, R. Weldon and John A. Tranquilli 1977 Annual report for fiscal year 1976: Lake Sangchris project. Submitted by 1111nois Natural History Survey, Urbana, Illinois, USA. Lehmkuhl, D. M. 1979 Environmental disturbance and life histories: principles and examples. Journal of the Fisheries Reserve Board of Canada. 36:329-334.
l l l l -235-l l Marcy, Barton C. , Jr. , Allan D. Beck and Robert P. Ulanowiez. 1978. Effects and impacts of physical stress on entrainea organisms. Pages 135-188 in J. R. Schubel and Barton C. Marcy, edi tors.
~
Power plant entrainment, a blological assessment. Academic Press, Inc., New York, New York, USA. Merri tt , R. W. and K. W. Cummins, editors. 1978. An introduction to the
, aquatic insects of North America. Kendall-Hunt Publishing Company, Durbuque, Iowa, USA.
Oliver, D. R. 1971. Life history of the Chironomidae. Annual Review of Entomology. 16: 211-230. Reed, J. R., Jr., and Associates, Inc. 1979 Annual Report: Environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company, Richmond, Vi rginia, USA.
. 1981. Annual Report: Environmental study of Lake Anna, Virginia. Prepared for Virginia Electric and Power Company, Richmond, Virginia, USA.
Rosenberg, D. M., A. P. Wiens and B. BilyJ. 1980. Sampling emerging Chironomidae (Diptera) with submerged funnel traps in a new northern Canadian reservoir Sourthern Indian Lake, Manitoba. Canadian Journal of Fisheries and Aquatic Sciences. 37: 927-936. Sickel, J. B. 1973 A new record of Corbicula manilensis (Phillipl) in the southern Atlantic slope region of Georgia. The Nautilus 87(1): 11-12. Voshell, J. Reese, Jr. and George M. Simmons, Jr. 1977 An evaluation of artificial substrates for sampling macrobenthos in reservoirs. Hydrobiologia. 53(3): 257-269 l Wiggins, G. B. 1977 Larvae of the North American caddisfly genera (Trichoptera). l University of Toronto Press, Toronto, Canada. t l 1
-236-Table 5.1 TAXONOMIC LISTING cc MACR 0 BENTHIC ORGANISMS COLLECTED IN ARTIFICIA'. SUBSTRATE BASKETS IN LAKE ANNA AND THE W.H.T.F. DURING 1981 .
Phylu- 'tyhelminthes Class Turbellaria Phylum Annelida Class Hirudinea Class Oligochaeta Order Plesiopora Family Naldidae Family Tubificidae Phylum Arthropoda Class Arachnoidea Order Hydracarina Family Hygrobatidae Megapus sp. Class Crustacea Order Amphipoda Family Talitridae Hyalella azteca Class insecta Order Coleoptera Family Elmidae Microcylloepus sp. Stencelmis sp. Order Diptera Family Ceratopogonidae Palpomyia sp. Family Chironomidae Subfamily Chironominae Chironominae pupae l Tribe Chironomini Chi ronomini pupae l Chironomus sp. Cryptochi ronomus sp. i Cryptotendipes sp. l Dicrotendipes neomodestus f Glyptotendipes sp Harnischia sp. Parachironomus frecuens ! Paralauterborniella sp. I Phaenopsectra flavipes Polypedilum scalaenum (= halterale) P. i l l i noens e Pseudochironomus sp. Stenochironomus sp. Tribelos sp. l T. jucundus ! Xenochironomus sp.
-237-Table 5.1 (Cont'd.)
Order Diptera (Continued) Tribe Tanytarsini Cladotanytarsus sp. Micropsectra sp. Paratanytarsus sp. !. Rheotanytarsus sp. Tanytarsus sp. (Calopsectra) Subfamily Diamesinae Potthastia longimannus , Subfamily Orthocladlinae Orthocladlinae pupae Brillia sp. Cricotopus sp. Cricotopus/Orthocladius Hydrobaena sp. Hanocladius sp. Orthocladius sp. Psectrocladius sp. Thienemanniella prob. xena Subfamily Tanypodinae Ablabesmyia cinetipes A.,parajanta A.,peleensis A. tarella Anatopynia sp. Coelotanypus sp. Pentaneura sp. Procladius sp. Family Chaoboridae Chaoborus punctipennis l Order Ephemeroptera Family Baetidae Cloeon sp. l l Family Caenidae Caenis sp. l l Family Ephemeridae l Hexagenia sp. l Hexagenia munda Order Magaloptera Family Sialidae Sialls sp. Order Odonata Suborder Anisoptera Family Cordullidae Epicordulia sp. Neurocordulla sp. N. molesta (([obsoleta Tetragoneuria sp.
Table 5 1 (Cont'd.) -238-Order Odonata (Continued) Suborder Anisoptera (Continued) Family Gomphidae . Dromogomphus sp. D. spinosus Family Libellulidae Macromia sp. Suborder Zygoptera Family Coenagrionidae Argia sp. Enallagma sp. Order Trichoptera Family Brachycentridae Brachycentrus sp. Family Hydropsychidae Hydropsyche sp. Family Hydroptilidae Hydroptila sp. Oxyethira sp. Family Leptoceridae Oecetis sp. Family Limnephilidae unknown sp. Family Molannidae Molanna sp. Family Polycentropodidae Cyrnellus sp. Neureclipsis sp. N. crepuscularis Polycentropus sp. Polycentropodidae pupae I Phylum Mollusca Class Gastropoda 1 Order Pulmonata Family Physidae Physa sp. Family Planorbidae Heliosoma sp. l 4 Class Pelycypoda l Order Heterodonta Family Corbiculiidae Corbicula fluminea j Order Palaeoheterodonta Family Unionidae Strophitus undalatus
TABLE 5-2.11ACPCSEllTHIC QRGANISitS COLLECTED CY STATION Aim DEPTH IN ARTIFICIAL SUDST; ATE BASKEi$ IN THE PESERv01R ME 6 TASTE HEAT IREAIp1EHT FACILITY Of LAKE M8IA, VIRGItilA. CURIt'$ 19S1. SPECIES A2 A.,7 D_2 @_7 C_2 C_7 D_2 D_7 E.,2 E7 H_2 H7 IIIRUDINEA 1 . . . . . 10 1 1 . 2 7 DLICOCHAETA 14 2 . . 1 . 2 . 1 2 8 5 HAIDIDAE . 2 . . . . . . . . . . TUBIFICIDAE 3 8 2 . 1 . 5 4 1 . 6 4 F1EG/ PUS SP. . . . . . . 1 . . . . . HfALELLA AZTECA 4 . . I 1 . 20 1 46 1 8 1 IIICROCYLLDEPUS SP. . . . . . . . . . . . 1 SIEt:ELt113 SP. . . . . . . . . 1 . . . PALPC1111A SP. . 1 . 1 . . 5 2 3 8 . 3 CHIR 0t30ft!!!AE PUPAE . . . 1 . . . 1 2 1 4 . C111R0f 30!1Ill! PUPAE 4 . . . . . . . . . . . CHIR 0'latfL'S SP. 5 . 17 2 . 1 11 2 3 . 12 11 CRfPTCCllIRotlOt1US SP. 4 7 5 4 . . 3 3 1 1 9 10 CRIPIOIEttDIPES SP. 6 . 17 2 . . . . 6 1 8 3 DICROTLt!DIFES tlECt10DESTUS 111 3 118 3 17 1 29 2 80 3 57 3 ' GLYPTOTEIGIPES SP. 3 2 31 11 1 1 3 2 6 31 24 21 ItARNI! CHIA SP. . . . . . . . . . . . 6 PARALHIRottor:US FREQUEllS . . . . . . . 1 . . . . PARALAUTE700RHIELLA SP. . . . . . . . . . . I 1 P:tAtt!OPSECTRA FLAVIPES . . . . . . . . . . 1 . FOLYPEDILLES it4LTERALE . . . . . . . 2 1 1 1 4 2 4 w POL 1PE0!LUt1 ILLII:0 Ell 3E . . 1 1 . . . FSEUDOCHIrct10t1US SP. 3 . 13 5 . . 1 . 2 3 7 10 STEf;OtitIR0!400'US SP. . 1 . . . . . . . . . . TRIEELOS SP. . . . 3 . . . . . 1 . . I 1RICELCS JUCIADUS . 1 . 2 . . . . 1 . 1 . l XE!!OCilIRO?t0t1US SP. 4 5 . . . . . 2 1 . . 10 CLADOTAtiVTARCUS SP. . . . . . . . . . . 15 7
?!ICROPSECTIA SP. . . . . . . . . . . . 5 PARATAi!YTAR US SP. 16 1 111 6 4 1 77 2 56 12 47 23 RHIOTAHfTARSUS SP. . . . . . 1 . . . . . .
Tt.fifiARSUS SP.(CALOPSEC1RA) 1 . 3 . . . . . 1 . 5 . TOTTHASTIA LC'!GIllAt1US 1 . 3 . 3 1 . . 1 . 1 . OR TlicCL A9IIllAE FUPAE . . . . 1 . . 1 . . 4 . ERILLI A SP. . . . . . . . . . . 2 . LRICOf0 PUS SP. . . 1 . . . . . 2 . . . CRIC010FU3/O'111tCCLADIUS SP. . . . . . . 3 . 3 . . . HYDR 03A[tfA SP. . . . . . . . . . . 1 . Hall 0CL/DIUS SP. I 6 . 1 . 4 . 6 . . 9 1
~
CRil10CL/DIUS SP. 1 . . . . . . . . . . . FSECirCCL/DIUS SP. 23 4 23 8 9 13 7 6 38 6 59 8 THIE!! Lit.',t:!IIELL A FROD. XEtIA . . . . . . . 1 . . . . ACLADESt1YIA CIllCTIPES . . . 1 . . . . . . . .
/SL ADES!!f!A PAPAJAllIA 5 '+ 73 171 116 2 20 56 14 70 64 63 43 ,
A3 LACES!!rIA PELEENSIS 1 . . . . . . . . . . . t.CteC 0f tf!A T *RELLA 27 40 38 38 5 24 6 6 24 20 11 2 tilA10PittTA SP. 1 . . . . . . . . . . . ECELOTtJatPU3 SP. 31 9 46 29 1 . 20 4 25 11 116 101 C FII:T/ilEU?A SP. . . . . . . . . . 1 . . FROCL/,DIUi SP. 7 3 23 40 3 . 24 1 21 45 17 36 CHA?Bor?t'S PUt:CTIPEltalS 1 1 . . . . . . . . . . CLDECtl SP. . . 1 , . . . . . . 2 .
'll
TABLE 5-2. PlACROBENTilIC ORGANISitS COLLECTED BY STATI0t4 Ate DEPTH IN ARTIFICIAL SUBSTRATE BASKETS Iti THE RESERVOIR AHO RASTE IfEAT 1REATt1Elli FACILITY OF LAKE AtalA, VIRGIllIA. DtDING 1931. SPECIES A_2 A_7 B.2 B_7 C2 C_7 D_2 D_7 E2 E_7 H_2 H_7 CAEHIS SP. . . . . . . 2 . . . . . If 5XAGEtII A SP. . 1 . . . . . . . . . . HEXAGEHI A flutlDA 8 2 89 40 . . 35 2 102 38 8 . SIALIS SP. 1 . 3 1 . I 1 . 3 4 6 2 EPIC 0~DULIA SP. 1 . . . . . 1 . . . 1 . IIEUPOCO'?DULI4 SP. 3 1 . . . . . 1 . . . . 84EUROCCRDULI A It0LESTA . . . . . . 1 . . . . . HEUROCO20ULIA 00SELETA . 1 . . . 1 . . . . . . TETRAGfMIEtK!!A SP. I 1 2 . . 1 . . . . . . DRuttcSattFl:US SP. I 1 . , 3 1 . . 3 1 1 . DRott0GOMrHUS SPINOSUS . . 1 . , t 2 . . . . . . tLtCR0ftIA SP. . 6 . . 2 1 . . 2 . 1 . ARGIA SP. 16 7 10 24 4 16 4 3 24 3 5 4 EllALLAGitA SP. 9 . 11 1 1 2 14 . 4 1 '5 3 EPACHTCEllIFUS SP. . . . . . . 1 . . . . . HVDROPSICHE SP. . . . . . 1 . . . . . . HYCROPTILA SP. . . 2 . 2 3 7 . . . 1 . OXYEllf1RA SP. 1 . . . . . 1 . 1 . . . OECETIS SP. . 1 . . . . . . 2 1 . 1 LIlitlEPHILIDAE . . . . . . 1 . . . . . t10LAt#8A SP. 3 . . . . . 1 498 252 171 4 CyrtlELLU3 SP. 260 202 141 99 2%5 2261 198 72 130 s-ITEURECLIPSIS SP. 1 . . . . . . . . . . .
?
IlEURECLII'5IS CREPUSCULARIS . . . . 2 2 . . . . . . POLYCElliR07tlS SP. 34 7 736 119 36 13 273 21 348 51 50 12 POLICEHIF0F00IDAE PttPAE 2 . . . 15 50 1 12 . . . . PHYSA SP. . 1 . . . . . . . . . 1 IIELISfNik SP. 1 . . . 1 . 1 . . . 6 1 CORDICULA F LU: TINEA 1955 3974 498 510 3152 5620 713 2191 548 632 943 774 STROlilITUS Ul:DALAIUS . . . . . . . . . 1 . . itn0EL LARI A . . . . . . 1 1 . . 8 2 TOTAL # TAXA 41 31 to 27 25 25 37 28 37 29 41 35 TOTAL CAICil 2624 4382 2117 1069 6214 8042 1541 2791 1506 1075 1737 1295 M
.mme
TABLE 5-3. TOTAL IWUMBE3 DF ttACROBENTHIC TAXA (T) AHD TOTAL AButeANCE I A) COLLECTED Cf STATION At3 GY DEPTH Ill ARTIFICIAL 4 SUBSTRA1E BACKETS Ill THE RESERVOI2 AHO HASTE HEAT TREAlttEHT FACILITY OF LAKE At04A. VIRGINIA. DURING 1981. _ F10tlTH A_2T A_2A A_7T A_7A B_2T B_2A B_7T B_7A C_2T C_2A C_7T C_7A D_2T D_2A D_7T D_7A E 2T E_2A E_7T E_7A lt_2T H_2A H_7T tt 7A 1 14 326 8 830 18 342 13 97 5 976 6 1151 0 . 0 . 0 . 0 . 0 . 0 . 2 19 372 12 255 15 290 14 227 11 1675 11 1250 to 152 8 477 16 183 12 140 17 342 12 155 3 10 248 6 430 13 190 12 71 6 663 6 1013 17 156 9 377 17 159 11 132 19 179 15 120 4 16 534 10 3S3 11 206 12 163 9 536 7 1561 15 138 6 370 17 126 13 147 16 81 14 73 5 7 268 6 430 16 259 11 137 6 781 6 980 12 176 8 275 12 103 10 159 10 149 8 37 6 16 457 8 243 7 155 9 113 6 547 3 439 10 271 7 508 12 178 11 142 16 232 12 164 7 0 . 0 . 0 . 0 . 0 . 0 . 10 177 5 346 9 220 11 126 14 191 10 226 8 4 134 7 203 5 97 7 73 4 439 7 404 8 125 4 146 11 169 9 74 14 257 12 233 9 10 159 11 402 11 138 10 132 3 428 5 582 10 174 8 98 11 165 8 34 11 229 11 166 11 10 45 6 150 13 154 5 27 5 122 7 243 14 80 5 70 15 80 8 76 13 50 11 49 12 10 81 3 331 13 286 6 29 7 47 10 419 12 92 7 124 11 123 3 45 15 77 17 72 b f 4
==
mm o a 11
TABLE 5-4. COEFFICIEllT OF C0titM4ITY C0t' PARIT;0tt BETWEEtt ALL STATI0t4S C0t1 bit 4ItlG 2 NETER A10 7 METER DEPTHS FOR ARTIFICIAL SUDSTRATE BASKETS Ill THE RESERVOIR AfD MITF OF LAKE At04A. VIRGINIA. DURIllG 1981. STATI0ft A B C D E H A 1.00000 0.57143 0.60000 0.61538 0.55172 0.50000 8 0.57143 1.00000 0.61538 0.68750 0.63571 0.46667 C 0.60000 0.61538 1.00000 0.50000 0.51832 0.27273 D 0.61538 0.68750 0.50000 1.00000 0.54E45 0.50000 E 0.55172 0.68571 0.51852 0.54545 1.00000 0.53C65 H 0.50000 0.46667 0.27273 0.50000 0.58065 1.00000 s N J:- N 8
==
-243-TABLE 5-5 DUNCAN'S MULTIPLE RANGE TEST, DATE BY STATION, FOR MACR 0 BENTHIC MEAN DENSITIES IN SUBSTRATE BASKETS COLLECTED IN LAKE ANNA AND THE W.H.T.F.
DURING 1981. VALUES CONNECTED BY THE SAME LINE ARE NOT SIGNIFICANTLY DIFFERENT (0.5 LEVEL) JANUARY STATION B A C 3i 219.5 578.0 1063.5 FEBRUARY STATION E H B D A C I 161.5 248.5 258.5 314.5 612.5 1462.5 MARCH STATION B E H D A C II 130.5 145.5 149.5 266.5 339.0 838.0 APRIL STATION H E B 0 A C II 77.0 136.5 184.5 254.0 458.5 1048.5 MAY STATION H E B D A C I 93.0 131.0 198.0 225.5 374.0 880.5 JUNE STATION B E H A D C I 134.0 160.0 198.0 350.0 389.5 493.0 i i
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~
TABLE 5-5 (Continued) JULY STATION E H D 3i 173.0 208.5 261.5 AUGUST STATION B E D A H C II 85.0 121.5 135.5 207.0 245.0 421.5
, SEPTEMBER STATION E B D H A C II 99.5 135.0 136.0 197.5 280.5 505.0 NOVEMBER STATION H D E B A C 3i 49.5 75.0 78.0 90.5 97.5 182.5 DECEMBER STATION H E D B A C i
3i 74.5 84.0 108.0 157.5 206.0 233.0 t l I l 5 I i I
-245-TABLE 5-6. DUNCAN'S MULTIPLE RANGE TEST, STATION BY DATE, FOR MACROBENTHIC MEAN DENSITIES IN SUBSTRATE BASKETS COLLECTED IN LAKE ANNA AND W.H.T.F. DURING 1981. VALUES CONNECTED BY THE SAME LINE ARE NOT SIGNIFICANTLY DIFFERENT
(.05 LEVEL) STATION A I MONTH Nov. Dec. Aug. Sep. Mar. Jun. May Apr. Jan. Feb. I 97.5 206.0 207.0 280.5 339.0 350.0 374.0 458.5 578.0 612.5 1 STATION B MONTH
- Aug. Nov. Mar. Jun. Sep. Dec. Apr. May Jan. Feb.
7 85.0 90.5 130.5 134.0 135.0 157.5 184.5 198.0 219.5 258.5 STATION C MONTH Nov. Dec. Aug. Jun. Sep. Mar. May Apr. Jan. Feb. I 182.5 233.0 421.5 493.0 505.0 838.0 880.5 1048.5 1063 5 1462.5 STATION D MONTH Nov. Dec. Aug. Sep. May Apr. Jul. Mar. Feb, Jun. l 7 75.0 108.0 135.5 136.0 225.5 254.0 261.5 266.5 314.5 389.5 STATION E MONTH Nov. Dec. Sep. Aug. May Apr. Mar. Jun. Feb. Jul. 7 78.0 84.0 99.5 121.5 131.0 136.5 145.5 160.0 161.5 173.0 STATION H MONTH Nov. Dec. Apr. May Mar. Sep. Jun. Jul. Aug. Feb. l 7 49.5 74.5 77.0 93.0 149.5 197.5 198.0 208.5 245.0 248.5 l
Table 5-7. DENSITY (per m ) AND PERCENTAGE OF SIZE CLASSLS FOR Corbicula flunine_a AT SIX SAMPLlHG LOCATIONS DURiflG JULY. 1981. PERCENTAGE COMPOSITION . VALUES ARE IN PAREllTHESES Size Class 1 Size Class 11 Size Class til Size Class IV Total (< 7.5 mm) (7.6- 13.5 mm). ( 13.6- 18. c mm) (18.6-28.0 mm) Lag. I 2.7 (1.3) 156.1 (76.3) 16.1 (7.9) 29.6 (14.5) 204.5 Wi!TF Lag. 2 8.1 (3.5) 172.2 (74.4) 43.1 (18.6) 8.I , ( 3.5) 231.4
. Lag. 3 118.4(34.1) 199 1 (57.4) 24.2 (7.0) 5.4 ( l.5) 347.1 Dike 3 247.6(40.2) 209 9 (34.1) 156.1 (25.3) 2.7 ( 0.4) 616.2 Cove Reser- Intake 26.9(71.4) 5.h ( l .6) 2.7 ( 7.1) 2.7 ( 7.1) 37.7 h voir i' Confluence 40.4(88.2) 2.7 ( 5.9) 0.0 ( 0.0) 2.7 (5.9) 45.7 1
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-253-O Entrainment
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'k IN
-254-INTP,00UCT I 0tl The cooling water intake structure at electric generating sta* ions is one area where contact between the environment and the station is most evident. The environmental Influences of operations are readily observable at this point because they are primarily physical in nature. One of the more direct results of operations is the incorporation of small organisms into the cooling water flow, which is referred to as entrainment (Coutant 1974). Entrainment causes a reduction in the Ichthyoplankton population, which in effect is similar to an increase in natural predation. Predation and other mortality factors affecting larval populatio.is are important in determining the stability of the adult fishery stock and its recrui tment success (Polgar 1977) . A station's first years of operation are not generally thought to cause irreversible ef fects on fishery populations (Lawler and Englert 1977).
The entrainment program at florth Anna Power Station has been implemented and carried out to comply wi th the Virginia State Water Control Board's ll.P.D.E.S. permit no. VA0052451, Special Conditions: Environmental Studies. The sampling provides data on the relative numbers and species composition of fish eggs and larvae entrained by the circulating water pumps. ' These data are used for the analysis of the impact of entrainment on the mature fishery. The analysis assumes a 100t mortality of entrained organisms which represents a worst case situation; however, actual mortality is thought to be lower in neny cases (Ecological Analysts, Inc. 1977). The survival of entrained organisms is dependent on a particular plant's design and mode of operation. The degree of mechanical, thermal and chemical activity within the cooling system is the key factor in determining survival rates (Ecological Analysts, Inc. 1977).
1
-255-METHODS AND MATERIALS The 1981 entrainment sampling program extended from March 5 to July 30. During this period samples were collected at 0600, 1200, 1800 and 2400 hours each week.
Samples were taken at the surface, mid-depth and bottom by placing paired conical nets in front of a predetermined i.itake forebay (Figure 6-1) for 10 minutes per depth. The mesh size of the netAing was 505 u and the conical measurements were 0.5 m x 1 5 m. After 10 minutes the nets were retrieved and the samples were rinsed into jars. Samples were returned to the laboratory, sorted and preserved in 3% formalin. The collected samples were identified to the lowest possible taxon. The volume of water filtered during the sample was determined using large-vaned, low-velocity-sensitive digital flowmeters (General Oceanics Model 2030 MK 11). Water temperature and dissolved oxygen levels were taken at each sample depth. RESULTS AND DISCUSSION The number of larvae entrained in 1981 Increased 27% over the I 1980 values. The total catch during 1981 was 1753 larvae for all five species reported (Table 6-1). The distribution of species (Table 6-2) was: 64.2% for gizzard shad (Dorosoria cepedianum), 22.3% for white perch 1 (Morone americana), C..'% for sunfish (Lepomis spp.), 5.9% for yellow perch i (Perca flavescens) and 0.9% for black crappie (Pomoxis nigromacularus). The increase in entrainment is primarily due to a substantial increase in the number of white perch larvae entrained. White perch represented 0.25% of the total catch in 1978 and has increased in the past three years to 22.3% in 1981. White perch entrainment values peaked in late April and early May. The continued increase of white perch larvae is a result of a similar increase in the adult population (see Fish Section). All other u i --e
-256-species of entrained larvac have also increased in numbces fron 1980 values except for Lepomis spp. which declined slightly. Gizzard shad and black crappie were entrained in greatest numbers during May and June while Lepomis spp.were collected primarily in June and July. yellow perch were most abundant in April.
Gizzard shad continued to be the most abundant species in the entrainment samples, which was expected, due to a relatively large adult population and their nature of spawning (broadcast). Although gizzard shad larvae have increased in numbers over the 1930 values, the percentage of representation in the total catch has decreased from 74% to 64%. The spatial, temporal distribution of entrained gizzard shad , and white perch larvae follow the pattern of previous years. The greatest entrainment for these species occurred at the middle and bottom depths (Table 6-3) during the 2400 hour sample (Table 6-4). This pattern conflicts wi th the findings of Tuberville (1977) but is supported in other studies (Edwards et al. 1977; Netsch et al.1977). The remaining species were collected in greatest numbers from the surface samples during daylight hours. Lepomis spp, larvae were caught primarily during the 0600 hour sample while yellow perch were mainly caught during the 1800 hour sample. Black crappie were not collected in sufficient numbers to determine a peak entrainment time. Factors such as turbidity, temperature, larvae size and gear type have been shown to influence distribution patterns (Tuberville 1977). Any combination of these factors could cause a si te specificity in larval distribution. The large number ofIarvae collected at night is probably a function of net avoidance (Gasser 1976) . ;-
-257-Daily entrainment estimates were prepared treating depths as strata. Stratum weights were equal and the finite correction factor was 3
ignored (Cochran 1963) . Daily density values (larvae /1000m ) ar e multiplied by the average volume pumped that sample day (Table 6-5) . Period estimates were computed using daily estimated and the number of days in each period. Variances for period estimates were taken as a weighted average of daily variances. Totaling period estimates by species result in an estimate of 2.494 x 10 larvae entrained from March to July 1981 (Table 6-6). The, total number of larvae entrained per pump in 1981 (Fig. 6-2) was comparable to the numbers entrained in 1979 and 1980. Density values for 1978 were comparatively low. l l During 1981 entrainment sampling, no fish eggs were collected. i Most species of reproducing fish in Lake Anna produce demersal, adhesive eggs which significantly reduces potential entrainment (Lippson and Moran I i 1974). It has been shown that mortality during the early life history
~
of fish is a major factor in determining stock stability (Polgar 1977). The effects of entrainment on stock stability can be assessed by determining the number of adults represented by the entrained larvae (Long Island Lighting Co. 1977). Several models were considered for the Lake Anna entrainment program (Horst 1975; Hackney and Webb 1977; and Goodyear 1978). Goodyear's (1978) equivalent adult model was used because it eliminates sources of error found in the oth?rs that could underestimate impact. The model is based on work that shows larval mortality being a function of length class (Swedberg and Walburg 1970). Goodyear shows that data on abundance of larvae, grouped by body length, can be used to estimate a probability of survival from one length class to the next during the period that larvae are vulnerable to entrainment. The number of adults that would have i- .
. _ . . . . _ . - - - - _ _ - _ - - - - - - - - - - - - - - - - - A
-253 -
resulted from larvae entrained can be estimated by the equation: k na = E NSgg L=1 Where:
- K = number of larval length classes that are subject to entrainment mortality N g = number of length class t killed by entrainment S g = Survival probability from length class to adulthood, which can be derived from the equation: ,
Sg = Se,g Fa Where: Fa = Average lifetime fecundity survival probability from egg to length class 1, which can Se,g = be derived from the equation: Se,g = He Where: H = fraction of eggs that hatch L = Length of length class i t h = Length of hatching d = instantaneous mortality rate of length class 1, which is derived from the equation: k I d= -In t=2 Ne k I Ng l=1
-259- .
The equivalent adult analysis is based on the following assumptions:
- 1) There is 100% mortality of entrained I arvae
- 2) The stock populations are at equilibrium and the total lifetime fecundity produces two adults
- 3) No compensatory mechanisms are operating ,
- 4) 75% of the eggs produced by the entrained species survive to the larval stage Lifetime fecundity values and hatching success rates (Table 6-7) were averaged from the literature (Schubel 1974; Edsall 1977,; New York State Gas and Electric Co. 1977; Hardy 1978; Jones et al. 1978; and Heberline et al. 1981)
The hatching success values appear to be high for at least some species. Values for survival of eggs to the larval stage (Table 6-8), survival of larvae reaching adult stage (Table 6-9) and instantaneous rates of mortality (Table 6-7) were calculated using the above equations. The results of the analysis (Table 6-10) indicate that the population most affected by entrainment is white perch. This is because of the high survival probability (1 in 50) of the larvae reaching the adult stage which would make each larvae entrained greater in relative significance. The number of white perch entrained would theoretically reduce the spawing population by 3.4%. Spawning stock reductions for Lepomis spp. would be 2.6% followed by yellow perch (1.6%), black crappie (0.5%) and gizzard shad (0 3%). These percentages are below values that are thought to cause significant impact on stock populations (Long Island Lighting Co.1977; New York State Electric and Gas Co.1977; Heberling et al.1981). The equivalent adult analysis in its present form provides a conservative estimate of entrainment impact because of its assumptions and elimination of compensatory mechanisms. Regardless of the source of a disturbance on fish populations there is a capacity within populations to offset a reduction in numbers (McFadden 1977). The impact of entrainment at Lake Anna is minimal when the values of percent cropping are considered
-260-in conjunction with other population mechanisms such as compensation (Restaino et al. 1978).
SUMMARY
- 1) Entrainment values for 1981 have increased 27% over 1980 values.
- 2) Gizzard shad remain the most dominant species of larvae entrained at Lake Anna Power Station in 1981.
- 3) Numbers of white perch larvae entrained have increased 22% over -
the 1978 values. This increase resulted in white perch replacing Lepomis spp. as the second most dominant species of larvae entrained at North Anna Power Station in 1981.
- 4) The highest rate of entrainment was found to be at the middle and bottom depths during the 2400 hour sampling.
- 5) An equivalent adult analysis shows that the percentage of standing crop reduction from entrainment is not significant and should have little or no impact on the Lake Anna fishery.
-261-Literature Cited Cochran, W. G. 1963 Sampling techniques. Wiley and Sons , Inc. , New York, New Yorb USA.
Coutan t , C. C. 1970. Opening remarks at the second workshop on entrainment and intake screening: evaluation of entrainmeat. Pages 1-11. Edited by L. D. Jensen. Proceedings of the Second Workshop on Entrainment and intake Screening. Electric Power Research Institute, Palo Alto, California, USA. Ecological Analysts, Inc. 1977 A review of entrainment study methodologies: aSundance and survival. Prepared for Empire State Energy Research Corporation, New York, New York, USA. Edsall, A. E. 1977 The ef fect of temperature on the rate of development and survival of alewife eggs and larvae. U. S. Bureau of Commercial Fisheries. Contribution No. 409, Ann Arbor, Michigan, USA. Edwards, T. J., W. H. Hunt and L. L. Olmstead 1977. Density and distribution of larval shad (Oornsnma spp.) in Lake Norman, North Carolina - Entrainment at McGuire Nuclear station. Pages 143-148. Edited by L. L. Olmstead. Proceedings of the First Symposium on Freshwater Larval Fish. Duke Power Company, Huntersville, North Carolina, USA. Gasser, L. F. 1976. Spatio-temporal distributions of clupeid larvae in Barkley Reservoir. Pages 120-138. Edi ted by R. D. Hoyt. Proceedings of the Third Symposium on Larval Fish. Division of Water Resources Tennessee Valley Authori ty, Norris , Tennessee, USA. Goodyea r , P. L. 1978. Entrainment impact estimates using the equivalent adult approach. U. S. Department of Interior, Fish and Wildlife Service. Publication FWS/0BS-78/65 Washington, D. C., USA. Hackney, P. A. and J. C. Webb 1977. A method for determining 9,c.:th and mortality rates of ichthyoplankton. Division of Forestry, Fisheries and Wildlife Development Tennessee Valley Authority. Norris, Tennessee, USA. Hardy, J. D. 1978. Development of fishes of the mid-Atlantic Bight Volume Ill. U. S. Department of Interior, Fish and Wildlife Service. Publication FWS/0BS-78/12. Washington, D. C., USA. Heberling G. D. , K. N. Mueller and J. W. Weinhold 1981. Section 316(b) Demonstration for the Riverside Generating Plant. Northern States Power Company. Minneapolls, Minnesota, USA. Horst T. J. 1975 The assessment of impact due to entrainment of ichthyoplankton. Pages 107-118. Edited by S. B. Salla. Symposium on Fisheries and Energy Production. D. C. Heath, Lexington, Massachusetts, USA. Jones, P. W., D. F. Martin and J. D. Hardy, Jr. 1978. Development of fishes of thG mid-Atlantic Bight Volume 1. U. S. Department of Interior, Fish and Wildlife Service. Publication FWS/0BS-78/12. Washington, D. C., USA.
-262-Law l e r , J . P . e t a l . , 19 77. Models useful for the estimation of equilibrium population reduct' due to power plant cropping. Pages 103-113 Edited by L. D. Jenser.. t. A. Communications , Melville, New York, USA.
Lippson, A. J. and M. L. Moran 1974. Manual for identification of early development stages of fishes of the Potomac River Estuary. Martin Marietta Co rpo ra t i on . Baltimore, Maryland, Publication No. 783 U. S. Fish and Wildlife Service, Washington, D. C., USA. Long Island Lighting Company 1977 Environmental statement related to operation 9f Shoreham Huclear Power Station Uni t 1. U. S. Nuclear Regulatory Commission, Washington, D. C., USA. McFadden, J. T. 1977. An argument supporting the reality of compensation in fish populations and a plea to let them exercise it. Proceedings of the Conference on Assessing the Ef fec;s of Power-Plant-induced Mortality on Fish Populations. Pages 161-175 Edited by W. Van Winkle. Pe rgamon Press, New York, New York, USA. Nersch. N. F., G. M. Kensh, J r. , A. Houser and R. V. Kilambi 1971. Distribution of young gizzard and threadfin shad in Beaver Reservoir. Pages 95-105. Edited by G. E. Hall. Reservoi r Fisheries and Limnology. Arc,erican Fishery Society. Special Publication No. 8, Bethesda, Maryland, USA. New York State Electric and Gas Corporation 1977 Report on entrainment at New Haven Nuclear Power Plant. New York State Electric and Gas Corporation, Binghamton, New York, USA. Polgar, T. T. 1977 Striped bass ichthyoplankton abundance, mortali ty and production estimation for the Potomac River population. Martin Marietta Corporation , Sa l t imore , Ma ry land , USA. Restanto, A. L., P. S. Bartholomew and M. J. McGarth 1978. The survival of entrained ichthyoplankton at Quad-Cities Station. Prepared for Commonwealth Edison Company. Hazelton Envi ronmental Sciences Corporation, Northbrook , Illinois, USA. Schubel, J. R. 1974. Ef fects of exposure to time-excess temperature his tories typically experienced at power plants on the hatching success of fish eggs. Prepared for the Power Plant Siting Program. Maryland Department of Natural Resources, Baltimore, Maryland, USA. Swedberg, D. V. and C. H. Walburg 1970. Spawning and early life History of the freshwater drum in Lewis and Clark Lake, Missouri River. Transactions of the American Fishery Society, Publication No. 90:560-570. Bethesda, Maryland, USA. Tuberville, J. D. 1977 Vertical distribution of ichthyoplankton in upper Nickajack Reservoir. Fisheries Resources Branch Divis;on of Water Resources Tennessee Valley Authority, Norris, Tennessee, USA. r b, _ . _ . _ _ _ _ _ _ _ _ _
-263-TABLE 6-1. SPECIES OF FISH LARVAE ENTRAINED AT NORTH ANNA POWER STATION TRO 1 MARCH THROUGH JULY. 1931.
l OSTEICHTHYES - CLUPEIDAE - herrings 30ROSOMA CEPEDIANUM - gi==crd shad PERCICHTHYIDAE - temperate basses MORONE AMERICANA - white perch CENTRARCHIDAE - sunfishes LEPOMIS SPP. - sunfish POM0XIS NIGR0 MACULATUS - black crappie PERCIDAE - perches P"RCA TLAVESCENS - yellow Perch
I TABLE 6-2. IRRtBERS AfD X OF LARVAE COLLECTED BY SAMPLE DATES IN ENTRAllR1ENT SAMPLES FR0ft MAPCH THROUCit JULY, 1981. AT tJORTH AIRLA POWER STATICII. SAMPLE PERCA 00POSONA POMOXIS LE PONIS HOROHE TOTAL VOLUME LARVAE / DATES FIAVESCEttS CEPEDIMRki 14IGRGMACULATUS SP. AttERICMLA FILTERED 1000 CUSIC CUCIC METERS 81ETERS
- 10. a 10. X tD. X tD. 2 UO. X 81-03-05 0 . 0 . 0 . 0 . 0 . 0 297.2 0.0 81-03-12 0 . 0 . 0 . 0 . 0 . 0 347.1 0.0 .
81-03-19 0 . 0 . 0 . 0 . 0 . 0 335.9 0.0 l 81-03-26 0 . 0 . 0 . 0 . 0 . 0 339.2 0.0 ! 81-04-02 19 100.0 0 0.0 0 0.0 0 0.0 0 0.0 19 459.8 41.3 01-04-09 33 100.0 0 0.0 0 0.0 0 0.0 0 0.0 33 426.0 67.9 81-04-15 50 98.0 0 0.0 0 0.0 0 0.0 1 2.0 51 507.9 100.4 81-04-23 1 3.1 0 0.0 0 0.0 0 0.0 31 96.9 32 451.0 71.0 81-04-30 0 0.0 11 14.9 0 0.0 0 0.0 63 85.1 74 453.1 164.4 81-05-07 0 0.0 72 37.7 1 0.5 0 0.0 118 61.8 191 459.6 415.6 81-05-14 0 0.0 165 71.4 1 0.4 0 0.0 65 28.1 231 404.8 570.7 81-05-21 0 0.0 331 80.5 3 0.7 0 0.0 77 18.7 411 473.4 et8.2 81-05-28 0 0.0 228 91.7 1 0.3 0 0.0 25 8.0 314 482.4 650.9 81-06-04 0 0.0 85 92.4 0 0.0 1 1.1 6 6.5 92 391.0 235.3 81-06-11 0 0.0 119 89.5 6 4.5 3 2.3 5 3.8 133 309.8 341.2 81-06-18 0 0.0 41 41.0 4 4.0 55 55.0 0 0.0 100 420.2 233.0 e 81-06-25 0 0.0 3 37.5 0 0.0 5 62.5 0 0.0 8 279.0 20.7 S$ 15 558.8 26.0 JP 01-07-02 0 0.0 4 26.7 0 0.0 11 73.3 0 0.0 ' 81-07-09 0 0.0 3 27.3 0 0.0 8 72.7 0 0.0 11 506.3 21.7 81-07-16 0 0.0 4 14.3 0 0.0 24 85.7 0 0.0 28 491.7 E6.9 81-07-23 0 0.0 0 0.0 0 0.0 8 100 0 0.0 8 400.0 16.7 S1-07-30 0 0.0 0 0.0 0 0.0 2 100 0 0.0 2 436.0 4.6 TOTAL 103 1126 16 117 391 1753
% OF TOTAL. 5.9 64.2 0.9 6.7 22.3 M@
M
i
)
T AEtE 6-3. TOTAL LARVAE COLLEClED BY SPICIES AfD SAMPLE DEPIH AT t0R1H AlatA IO4ER STAT 10t4 FRO:n NJWCH Tif.iOUGH JULT, 1981. SURFACE MIDutE LOTTon ED. X tD. X tr3. X OO90 SOMA CEPEDI AlfUti 219 19.4 473 42.0 4 3'e 38.5 l LTF0t115 SP. 102 87.2 6 5.1 9 7.7 I t'm O'IC AMERICAtlA 125 32.0 129 33.0 137 35.0 PLRC A F L AVESCEll3 74 71.8 18 17.5 11 10.7 F0:1CXIS tilRO:!ACULATUS 14 67.5 1 6.3 1 6.3 TOTAL 534 30.5 627 35.8 592 33.8 l
. l n 1 m l m
8 WO G4
TABLE 6-4. HUtEERS AfD PERCEtiT OF LARVAE COLLECTED BT SAttPLE TIttE FRutt ttARCH THROUGI JULY.1981, AT IDRTil Al#1A POWER STATI0ti. 0600 1200 1800 2400 tD. X 90. X VD. X 10. X DOROS0ttA CEPEDI Atlutt 173 15.4 143 12.7 277 24.6 533 47.3 LEP0t1IS SP. 41 36.8 38 32.5 26 22.2 10 8.5 t10ROttE AttERICAtlA 53 13.6 57 14.6 114 29.2 167 42.7 . PERCA FLAVESCEllS 15 14.6 12 11.7 41 39.8 35 34.0 FOtDXIS tlIGRottACULATUS 2 12.5 5 31.3 5 31.3 4 25.0 TOTAL 286 . 255 . 463 . 749 . s a PJ m I M
.m 1 .
TABLE 6-5. ESTIttATED LARVAE EllTRAINED DURIllG S AftPLE DATES AT tt0RTH AttiA pot ZR STATIO*l FR0tt t:APCH TliRCUOH JULY.1981. CLL AfD CLU ARE THE LC;;ER At:0 UFFER 95 % CC:;FIDEt;CE lit 1ITS OF THE ESTIt ATED CATCil. CATCH IS I:4 LARVAC PER 1000 CU31C t:ETERS Ato VOLU:!E IS It! THOUSAt:35 0F CU3IC t:ETERS.; DATE SPECIES CATCH PUt1PS VOLUTE CLL ESTIttATE CLU 810305 !!O FIS$1 TAKEN 3.0 3895 810312 t:0 FISH TAKEtl 3.0 3395 l 810319 tl0 FISH TAKEH 3.0 3895 810326 HQ FISH TAKEtt 5.3 6016 810402 PCRCA FLAVESCEttS 43.4 7.0 90C8 48.000 395.000 742.000 810409 PERCA FLAVESCEllS 69.5 8.0 10386 -198.000 721.000 1.641.000 810415 it0RONE AtiERICAt!A 1.9 7.0 902S -46.000 17.000 81.000 PERCA FLAVESCEtIS 101.3 -234.000 921.003 2.076.000 810423 t:0RO IE ArtEPICAtlA 68.4 7.0 9088 -94.000 621.000
- 1.337.000 FERCA FLAVESCEtt3 2.3 -55.000 21.000 18.030 810430 DCROSottA CEPCDIAt:UN 24.3 7.0 9038 -2.000 221.000 443.000 e I:0R01:2 A!!ERICAtlA 141.1 -461.000 1.233.000 3.026.000 $
N 810507 DC*2000tA CEPEDIAtlUN 161.0 8.0 10386 -746.000 1.673.C00 4.001.000 8 i:0202:E AttERICA!!A 262.3 -219.000 2.724.000 5.668.000 PO!;0XIS IIIG20:1ACULATUS 2.1 -60.000 22.000 105.000 810514 00ROSO A CEPEDIAtlutt 419.3 4.0 5193 323.000 2.178.000 4.033.000 t:0'lO::2 At*ERICAIM 169.1 217.000 878.000 t.540.0C0 PGt10XIS tlICEC:lACULATUS 2.8 -40.000 14.000 60.030 810521 DOCOGOMA CEPEDIAt:U:t 714.0 7.0 9088 -2.816.000 6.439.000 15.793.000' l I t;CRO' E At:ERICat:A 164.1 -519.000 1.492.000 3.E03.030 l PO:10XIS 14IGRC:nCULATUS 7.1 -171.000 64.003 303.000 810528 CCROSO tA CEFEDIAt:Utt 583.3 8.0 103G6 -3.560.000 6.110.003 15.7?3.000 , i;;.7DI:E A!!!KICA!!A 51.9 -437.000 539.003 1.566.000 PLOXIS tlICRO;lACULATUS 2.3 -63.000 23.000 109.003 810604 DCf'05C;14 CEPEDIAtiUM 218.3 7.0 9050 -1.106.000 1.934.000 5.073.000 LEFO:11S SP. 2.7 -65.000 24.000 114,000
!! ORC!!E A!!!RICAllA 16.3 -123.000 1(3.000 413.000 .
810611 0CR000:14 CEPEDIAt:UM 296.7 6.8 8763 -792.000 2.600.000 5.992.000 LEPO:lIS SP. 7.8 -15.000 63.003 151.003
!;G*?C"E Af t:RICAtlA 14.2 -166.000 124 CCO 414.000 PCtt0XIS IIICRG!!ACULATUS 15.8 -46.000 138.000 323.000 7
e . . .
9
-268-m cE LJ H D ooo oo oo oo oo o o si n d UUo oO O 3 oo oo o o M u u. a. o. o. o. o. o. o. u. o. o. o. o. .u eJ P Q 4N mo m4 oo eJ M MM M 4 of NN &A ui O N cJ eg M C f.1 f4 O M GA ed 4 h e4
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= o a a o. oa o .a o o .4 w , @MM w M 3 kJ to Ln N @ 4 M o * -d le t >= M fJ o o N N M in U ~ at 4 4 t- N N N N i 15 o u o o o o o a 4Q =o.J e4 e
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T# OLE 64. ESTItt4Tf D LARVAE Et41PAfflED FP0t1 ttAUQI TitPOUGli JULY.1981. AT 13082111 AttlA FOWER $1ATICte. CLL All0 CLU /SE t.PFEUXI:lATIC:43 O? IltC LO1:ER A13 UI.'ER 95% CCitF13f FEE Lit 1ITS OF 11tE EGilflATED CATCat. SPECIES CLL [SlIttATE CLt1 DCROSOMA CEPCOIAI AAt 143.317.000 157.1*9.000 170. 9M .00 3 LEFCitIS SP. 10.195.000 20.517.000 22.639.0C0
#DROI;E AltERICA!M 30.791.000 54.'io2.000 53.713.000 PL9CA FLAVESCDIS 12.574.C00 14.406.000 15.838.030 rai10X15 ll!GPO!!1CULAluS 0.243.003 2.583.0C0 2.916.000 10FAL 249.417.C00 l
l l e
%D e
e C......" --
t 1
-270-Table 6-7 VALUES FOR AVERAGE LIFLTINL FECUf 0ITIES (Fa) , l'45 tat TAf:COUS RATES OF MORTALITY (d), A:4D HATCHlflG SUCCESS RATC$ (H), U$ED I?4 THE EQUlVALE!4T ADULT A.4ALYSIS OF C4 TRAL?iME!!T AT f40RTH Art:4A POWER STATIG;4, 1981 Fa d H Perca flavescens 23,000 .66 75
*omonis nigrotraculatus 37.796 .85 . 75 Dorosoma cepedianum 59.480 .26 75 Lepomis spp. 10.751 .84 .75 Morone americana 40,000 .54 75
\ _ _ _ . _
J Table 6-8. PROBABILITY VALUES FOR SURVIVAL OF ECC5 TO THE LARVAL STAGE (Se 1:4 THE EQUIVAl.Lt4T ADUL T A;&ALYSIS OF ENTRAlt4M[t3T AT !!ORTI. All.4A POWER STATioil, 1981,,) FOR USL Species: Perca flavescens Pomonis nigrenaculatus Dorostuna c epedi anum leptunis spp. Horone a.m ricana Length l l 2 nun .2 .45 i 1 3 nun .103 .06 34 .06 .I48 : N N Enn .053 .03 .27 .026 .086 - I e Savn .027 .01 .20 .011 .05 l 6 nun .0th .16 .004 .029 7mm .007 .12 .002 .017 Bwn .09 .0009 .009 9an .07 .0003 .005 10nsa .06 .0002 .003 l insa .04 .0001 12nsa .03 13nn .03 14an .02 15asa .92
i
-272-g e
w o .!s m w 8 - ~ m e o o o ~ p o. . o. o. o. 8 -o. o. a 5 8 b
= -
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+ m ~
g' o o ~ m e 9 9 9 9 9 a
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= t ~
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~ ~
g [ 8 8 8 8 8 8 8 8 8 8 8 8 8 e C o o 8' 8 .- s* . e ,. -
=
se a 2 =- W
=
=<> 4.J . Mg l6, . o N m c o o o w W -c o. o. o. g g ga , 7 5 5_ =a { e= wa M9 - . 54 $ EE 5 o % ~ m e e,5 2 8 8 8 8 8
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Table 6-10. RESULTS OF THE EQUIVALErli ADULT A:lALYS15 0F 04T AAlllMLI4T AT 30 Rill A.1:4A POWER STAT 1014 1968 l
!aumber5 of Nuneer ent ralned Adults *5tanding Crop Percent Cropping Pcd u flavescens 14,406.000 18,757 1,147,522 1.6 Pomonis nigromaculatus 2,877,000 5,178 1,089,648 0.5 Dorosoma cepedianum 156,492,000 29,134 10,649,072 0.3
_lepomis spp. 20,223,000 1,244,389 47,244,400 2.6 Moronoe americana 53,20 7,00c 46,605 1,379,168 3. 4 Total 247,205,000 1,344,063 63,509,810 2.2
*8ased on rotenone studies
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ENVIRONMENTAL STUDY OF LAKE ANNA, VIRGINIA NORTH ANNA POWER STATION ANNUAL REPORT VOLUME II January 1 - December 31, 1981 h vYW
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Prepared by: Environmental Services Department Virginia Electric and Fower Company P. O. Box 26666 Richmond, Virginia 23261
; April,1982
i Environmental Study of
- Lake Anna, Virginia North Anna Power Station
- Annual Report 1 January 1,1981 - December 31, 1981 Volume 2 l
i l Prepared by: Environmental Services Department Virginia Electric and Power Company i P. O. Box 26666 ! Richmond, Virginia 23261 i l
- April 1982 l
i 1 s } f I I 1
TABLE OF CONTENTS VOLUME I Page introduction . ............................ 1 Station Operation .......................... 8 Physical and Chemical . . . . . .. . . ...... . . . . . . . .. 13 Endeco ........... .. . . . . ... . . . . . . .. . 17 Synoptic Temperature Surveys . . . . . . ... . .. . . . . .. 18 Water Quality . . .. . . . . ... . . . .... .. . . . .. . 19 Nutrients . . ... . . . . .. . . . .. . . ... . . . I.. 22 Heavy Metals .......................... 24 Zooplankton ...... . . . . . . . . .. .. . . . . . . . . ... 178 Benthic Macroinvertebrates . . . . . . . . . . . . . . . . . . . . . . 222 Special Studies: Ekman Dredge Collection of Corbicula fluminea . . . .. .. . . . . . . ... 231 Entrainment ............................. 253 VOLUME 2 , Ichthyoplankton Tows . . . . . . . . .. .. . . . . . . . . . . ... 276 Ichthyoplankton Culture . . . . . . . . . . .. .. . ... . . ... 344 Impingement ....... . . . . . . . . . . . ... . . . . . ... 354 Fishes . . . . . . . . . . . . . . ... . . . .. . . .. . . . ... . 373 Electroshock ................. . . . . . . ... 379 Gill Net ......................... ... 388 Rotenone ......... . .. . . . .. . . . .. . . . ... 396 Fish Food Study .. ......... ... .. . . . . . . . . ... 492 Striped Bass ........ .. . . . . . .. .. . . . . ... 494 Largemouth Bass . . . . . . . . . . . . . . . . . . . . . . ... 495
i , TABLE OF CONTENTS VOLUME 2 (Cont'd) Page i Fish Fecundity Study . . .................... . .. 508
- Female Largemouth Bass ..................... 512 1
i Male Largemouth Bass .................... . . 515 1 Female Striped Eass . . . . . . . . . . . . . . . . . . .. . .. 516 Male Striped Bass . ....................... 516 Fish Age and Growth Study ...................... 543 Largemouth Bass . . . . . .. .. . . . . .. . ... . . . . .. 546' 4 Striped Bass .......................... 550 i Waterfowl Study ........................... 559 Summary and Conclusions .............. ... ... . . . 565 i l 1 1 t a
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-276-Ichthyopiankton Tows
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-277-s introduction T .I
, T - A three year comprehensive program was undertaken to sample fish larvae (Ichthyoplankton) In Lake Anna, Virginia from 1979 through 1981. b s Such surveys provide an indication of spawning success and year-class strength
^
for many fishes of commercial, recreational and forage value (Kramer and
\s' i Smith 1962; Chadwick et al. 1977; Ulanowicz and Polgar 1980). This information >
is useful in the prediction and management of fishery resources within x f-4 a lentic environment (Van Winkle ed. 1977). The present study was designed 3 i ' to examine the spatial and temporal distribution of larval fishes in Lake T', Anna and document any fluctations over the three year duration, it should , , be noted that most reservoir fishes are nest builders, not broadcast spawners, and few eggs are expected in the samples. Methods and Materials x s
's Weekly Ichthyoplankton samples were collected in the W.H.T.F. ,
a., at five stations (Figure 7-1) during a 3 year period: June 5 to September ,
's
! 18,1979; March 14 to September 4,1980 and March 6 to September 11, 1981. , il Samples were also collected weekly in the Reservoir at three stations (Figure 7-1) during the 3 year period: March 15 to September 5, 1979; , March 6 to July 31,1980 (Middle Reservoir cnly) and March 6 to September 11, 1981. The Upper and Lower Reservoir stations were not sampled during , e, c% 1980. At each station an oblique tow was made in the open water where 3 1 .s water depths ranged from 6 to 18 meters and a cove two was made near the
,. s shoreline where water depths ranged from 1 to 4 meters. An oblique sample +
consisted of a 5 minute stepped-oblique tow (4 meters to surface; 1 minute 4 - i , each); a cove sample consisted of a 2 minute surface tow. , . h
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7's ; s a -278-s Additionally, day / night repetitive tows were collected during June (. ' and July 1981 at the Middle Reservoir station. Two stepped-oblique md two 2 . cove tows were taken on each sampling date during the af ternoon (1300-1700) ano again in the night (2200-2400) hours. The same personnel collected all s'amples on a given date to minimize variance. All samples were collected using a side-towed beam net (0 38 m
, . square; 1.6 m long: 505 y mesh). A digital torpedo flowmeter (General Oceanics
~ Model 2030 MK 11) was attached to the center of the net to determine the volume of water fil tered. Surface water temperature and dissolved oxygen measurements
- N were recorded at the time of each sample. The samples were returned to the
. laboratory for sorting and preservation in 3% buffered formalin. All fish q larvae were identified to the lowest possible taxon.
a + , Results s s Over 200,000 fish larvae were collected and identified from Lake Anna during 1979 through 1981. Larvae were collected from early March through September with the highest densities found during April through August (Tables s 7-1 and 7-2). Larval densities were lower in 1981 in comparison with the previous two years. This decline may be due to the decline of one genus (Lepomis spp.). There was little overall dif ference between the W.H.T.F. and the Reservoir when mean larval densities are compared on a seasonal basis 1 (Tables 7-1 and 7-2). l l Lepomis spp., gizzard shad (Dorosoma cepedianum), white perch (Morone T 's t. 8 s gadericang_), yeilow perch (Perca flavescens) and black crappie (Pomoxis
. N q-Nnigromaculatus_) in decreasing order of abundance were commonly collected in h(, $he plankton of Lake Anna over the three year duration of the study. In 1
gNT i [N addition,ssingle; captures of largemouth bass (Microoterus salmoides), chain N , 5: s
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-279-pickerel (Esox niger) and carp (Cyprinus carpio) larvae were also made.
The larvae of bluegill (Lepomis macrochi rus), pumpkinseed (L,. gibbosus) and redear sunfish (L,. microlophus) are taxonomically similar and very difficult i to distinguish and, therefore, all larvae wi th their characteristics were identified as Lepomis spp. Historically, bluegill comprise over 95% of the estimated combined population for these three fishes in Lake Anna (see Fish Section). Therefore, larvae identi fied as Lepomis spp.may be assumed to be bluegills in this report. Lepomis spp. comprised over 66% of the total larvae collected during the .three year survey. They were taken from late April through September with the highest numbers collected during Hay through August (Tables 7-3 through 7-10). Densities of Lepomis spp. larvae were typically two orders or magnitude higher in the cove samples than found in the corresponding oblique samples. Also, the larvae were two times more abundant at the W.H.T.F. s tations in i comparison to the Reservoir stations (Tables 7-11 and 7-12) . In addition, there l l was an order of magnitude decrease in mean Lepomis densities observed at most Lake Anna stations over the three year duration of the study. Gizzard shad accounted for 28% of the total larvae collected during the survey. They were taken from mid-April into early August with the highest numbers collected during May through June (Tables 7-13 through 7-22) . Larval l densities found in the coves were similar to that found in the oblique samples i during most of the year. Gizzard shad larvae were slightly more abundant at the Reservoir stations than at the W.H.T.F. stations. There was a slight decrease in gizzard shad larvae densities during 1981 when compared to the previous two years. White perch comprised 3% of the total larvae collected. They were taken from mid-April into early July with the highest densities found during l l
-280-late April and May (Tables 7-23 through 7-33). The larvae were equally abundant in the cove and oblique samples. Larval densities found at the Reservoir stations were typically one-half an order of magnitude higher than densities found at the W.H.T.F. stations. There was a slight increase in the white perch larval populations found in Lake Anna over the duration cf the- study.
Yellow perch made up 2% of the total larvae collected. They were collected from early March to early May with the highest numbers taken during mid-March through April (Tables 7-34 through 7-42). Yellow perch larvae were typically more abundant in the cove samples than in the oblique samples. The density and frequen;y of occurrence found for yellow perch larvae were similar at both the Reservoir and W.H.T.F. stations. Yellow perch larval densities were relatively constant over the duration of the study. Black crapple constituted 1% of the total larvae taken. They were collected from mid-April till late June with the highest densities found during May (Tables 7-43 through 7-52). Black crappie larvae were more abundant in the cove samples when compared with the oblique samples. The highest larval populations were found at the Middle Reservoir station. Populations at the remaining stations were too low to note with confidence any spatial or yearly variations. Survival rates, through the larval developmental stages, for the larval fishes collected during 1981, were calculated using a worst case hypothe-sis, that is with no net avoidance of the larger larvae (Tables 7-53 and 7-54). The larvae collected hatched f rom demersal eggs and remained in the vicinity of the nest for a variable duration of time. As a result estimates of yolk-sac larval populations from tow surveys can result in a gross underestimation of the total yolk-sac larval standing crop. The refo re , the best estimates of relative survival were obtained by using the, density of the early post la rvae
-281-as a reference point. By these calculations survival rates from the early to the mid postlarval stage was found to be 41%, 36% and 32% for Lepomis spp., white perch and yellow perch, respectively (Table 7-54) . Net avoidance was probably low during these two developmental stages. Survival from the early to the late postlarval stage was calculated to be lower (Table 7-54), but net avoidance by the late postlarval fishes was probably of significance and the actual survival rate should be higher. Survival of gizzard shad from early to the mid post-larval stage was excellent (79%). The lower survival rate calculated from the early to the late postlarval stage (14%) was due, in part, to a significant degree of net avoidance commonly reported for larger gizzard shad larvae.
Black crapple populations were too low to give significance to the low survival rate calculated for this species. Repetitive tows were taken at the Middle Reservoir station on eight dates during June and July 1981 (Table 7-55) . The data were analyzed using a l student "t" test treating the cove and oblique samples separately. The individual species composition and the total larval populations of the daylight repetitive samples were compared and no significant differences (0.05 level) were found. No significant differences (0.05 level) were also found when the l l night samples were analyzed in the same manner. When the total larval popu-lations of the day replicates were compared with the night replicates a significant difference (0.05 level) was found for 38% of the sample compari-sons. This was due, in part, to the collection of more larvae during the night hours. Day / night differences were significant (0.05 level) for gizzard shad on 9% and Lepomis spp.on 31% of the sample comparisons. l
-282-1 Discussion l Approximately %0 species of adult fishes have been collected in Lake !
Anna with the most abundant fishes being gizzard shad, bluegill, white perch, yellow perch and black crappie (see Fish and impingement Sections.) The' larvae of these dominant species were collected in substantial numbers for the duration of the study. Therefore, these large populations of fishes have continued to be self-sustaining with the operation of the North Anna Power Station's Units . I and 2 apparently having little effect. Striped bass (Morone saxatilis) young are stocked yearly in Lake Anna and are commonly collected as juveniles and in subsequent years as adults. Spawning of this species within Lake Anna has not been documented nor is spawning expected since appropriate spawning habitat does not exist within the lake. Largemouth bass were initially stocked in 1972 and from the reported adult catches (see Fish Section), there are apparently self-sustaining popu-lations within Lake Anna. Their larvae remain close to the benthos for a period of time af ter hatching and are rarely taken in the plankton (Hardy 1978). The adults of the remaining species are rarely taken in large numbers and apparently they spawn in isolated coves or in deep water. Their larvae either fall to enter the plankton or exhibit a sporadic distribution which resulted in their larvae being missed by 3 years of intensive sampling. The reduced larval densities of Lepomis spp.found during 1980 and 1981 may be the result of a reduction in the preferred spawning sites by low water levels (Carlander 1977) that were found during the 1980 and 1981 seasons. Jenkins (1970) compiling fishery data f rom numerous U. S. reservoirs, found that fluctuating water levels had a negative influence on bluegill populations.
e
-283-1 in addition, he noted a natural decrease in bluegill populations with increasing a
reservoir age. It should be noted, that even with the reduction of larval densities found, a relatively large and actively spawning population still remains in Lake Anna. Ahlstrom (1968) and Polgar (197') found that the strength of a year class was determined by the proportion of the larval population that survived to postlarval stage. A major obstacle in the calculation of larval survival rates through the postlarval stage, is the varying degree of net avoidance that is observed in dif fere:it :pacies of larvae. Larval swimming ability and subsequent net avoidance capabilities are directly proportional to body length (Ahlstrom 1954, Fleminger and Clutter 1965; Houde 1969; Barkley 1972 Murphy and i Clutter 1972). Therefore, assuming no mortality, a decrease in larval catch ! with increasing larval length would be expected. But, since appropriate numerical factors to calculate net avoidance do not exist, worst case survival rates were calculated to obtain a base line from which the considerably higher i actual survival rates expected can be inferred. From our calcula tions , at i least 10% of th'e Lepomis spo., gizzard shad and white perch larvae that survived yolk sac absorption in Lake Anna, were able to successfully feed and survive through the postlarval stage. This survival rate is within the range reported in the literature for these and related fishes (Havey 1973; Kissil 1974; Clady 1976; Amish et al.1978; Hardy 1978; Jones et al.1978; Jude et al.1979). Bowles et al. (1978) reviewed the biotic and abiotic factors that determine the representativeness of ichthyoplankton samples. Larval patchiness i and net avoidance are often listed as primary sources of variance (Ahlstrom 1954; Cassie 1963; Fleminger and Clutter 1965i Houde 1969; Wiebe 1970; Barkley 1972i Murphy and Clutter 1972). The favorable analysis of the l replicate tows taken during 1981 and the collection of the larvae of all five 1
-284-major Lake Anna fishes in concentrations relative to the adult populations, demonstrated the relative effectiveness of our' sampling program to monitor the dominant larval fish populations in Lake Anna. One dilemma resulting from the consistency required by monitoring programs, is that the larvae of minor fish species will continue to be collected in very low numbers.
Sunma ry
- 1. Fish larvae were collected during March through September in Lake Anna for the three year duration of the study.
- 2. The larvae of all five dominant adult fishes were collected in substantial numbers.
3 Larval populations were relatively stable over the three year duration. The decrease in Lepomis spp. larval populations is probably due to recent water level fluctuations and to the natural decrease in bluegill popu-lations commonly found with the increasing age of lakes.
- 4. The survival rates calculated for postlarval Lepomis sg).and gizzard shad in Lake Anna were comparable to other studies.
5 The ichthyoplankton sampling program was effective in monitoring the dominant larval fishes in Lake Anna.
- 6. The operation of the North Anna Power Station has had no discern-ible effect on Lake. Anna's ichthyoplankton populations.
-285-LITERATURE CITED Ahlstrom, E. H. 1954. Distribution and abundance of egg and larval populations of the Pacific sardine. Fishery Bulletin 56:83-140.
Ahlstrom, E. H. 1968. What might be gained from an oceanwide survey of fish eggs and larvae in various seasons. California Cooperative Oceanic Fishery investigation, Report. 12:64-67 l Amish, R. A., U. R. Kranz, B. D. Lorenz, D. B. Wilcox, L. K. Davis, and l B. B. Owen , J r. 1978. Section 316(b) demonstration for the Monticello l Huclear Generating Plant on the Mississippi River at Monticello, Minnesota ! (NPDES Permit No MN 0000868). Prepar ed for Northern States Power Company, l Minneapolis, Minnesota. Ecological Sciences Division, NUS Corporation, Pittsburgh, Pennsylvania. Barkley, R. A. 1972. Selectivity of towed net-samplers. Fishery Bulletin 70(3):799-820. Bowles, R. R., J. V. Herriner and G. C. Grant.1978. Factors associated with accuracy in sampling fish eggs and larvae. United States Fish and Wildlife Service, FWS/0BS-78-83 Carlander, K. D. 1977 Handbook of f reshwater fishery biology. Volume 2. Iowa State University Press, Ames, Iowa, USA. Cassie, R. M. 1963 Microdistribution of plankton. Oceanography and Marine Biology Annual Revi ew 1: 223-252. Chadwick, H. K. , D. E. Stevens and L. W. Miller. 1977 Some factors regulating the striped bass population in the Sacramento-San Joaquin Estuary, California. Pages 18-35 in W. VanWinkle, editor. Proceedings of the Conference Assessing the Effects of Power Plant Induced Mortality on Fish Populations, Gatlinburg, Tennessee, May 3-6, 1977 Pergamon Press, Elmsford, New York.
- Clady, M. D. 1976. Influence of temperature and wind on the survival of
- early stages of yellow perch, Perca flavescens. Journal of the Fisheries l
Research Board of Canada 33: 1887-1893 Fleminger, A. , and R. l. Cutter. 1965 Avoidance of towed nets by zooplankton. Limnology and Oceanography 10:96-104. Hardy, J. D., Jr. 1978. Development of Fishes of the M Id-Atlantic Bight, volume 3 Center for Environmental and Estuarine Studies, University of Maryland Contribution No. 785. United States Fish and Wildlife Service, FWS/0BS-78-12. Havey , K. A. 1973 Production of Juvenile alewives, Alosa pseudohorengus, at Love Lake, Washington County, Maine. Transactions of the American Fisheries Society 102:434-437 l l Houde, E. D. 1969 Sustained swimming ability of larval walleye (Stizostedion vitreum vitreum) and yellow perch (Perca flavescens). Journal of the Fisheries Research Board of Candada 26(b): 1647-1659
-286 -
Jenkins, R. M. 1970. The influence of engineering design and operation and other environmental factors on reservoir fishery resources. Journal of the American Water Resources Association, Bulletin 6(1): 110-119 Jones, P. W. , F. D. Martin and J. D. Hardy, Jr. 1978. Development of Fishes of the Mid-Atlantic Bight, volume 1. Center for Environmental
, and Estuarine Studies of the University of Maryland Contribution No.
783, United States Fish and Wildlife Service, FWS/0BS-78/12. Jude, D. J., G. R. Heufelder, H. T. Tin, N. A. Auer, S. A. Klinger, P. J. Schneeberger, T. L. Rutecki , C. P. Madenj ian and P. J. Rago. 1979 Adult, juvenile and larval fish in the' vicinity of the J. H. Campbell Power Plant, Eastern Lake Michigan, 1978. Great Lakes Research Division Specal Report No. 73, University of Michigan, Ann Arbor, Michigan. Kissil, G. W. 1974. Spawning of the anadromous alewife, Alosa pseudohorengus in Bride Lake, Connecticut.- Transactions of the American Fisheries Society 103(2):312-317 Kramer, R. H. and L. L. Smi th, J r. 1962. Formation of year classes in largemouth bass. Transactions of the American Fisheries Society 91: 29-41. Murphy, G. l. and R. 1. Clutter. 1972. Sampling anchovy larvae with a plankton purse seine. Fishery Bulletin 70(3): 789-798.
- Polgar, T. T. 1977 Striped bass Ichthyoplankton abundance, mortality
' and production estimation for the Potomac River population. Pages 109-125 in W. VanWinkle, editor. Proceedings of the Conference on Assessing the Effects of Power Plant-Induced Mortality on Fish Populations. Gatlinburg, Tennessee, May 3-6, 1977 Pergamon Press, Elmsford, New York. Ulanowicz, R. E. and T. T. Polgar. 1980. Influences of anadromous spawning behavior and optimal environmental conditions upon striped bass (Morone saxatilis) year-class success. Canadian Journal of Fisheries and l Aquatic Sciences 37: 143-154. l f VanWinkle, W. 1977 Proceedings of the Conference Assessing the Effects of Power Plant Induced Mortality on Fish Populations. Gatlinburg, Tennessee, May 3-6, 1977 Pergamon Press, Elmsford, New York. Wiebe, P. H. 1970. Small-scale spatial distribution in oceanic zooplankton. l l Limnology and Oceanography 15(2): 205-217 1 i i i
TABLE 7-1 . OEt4SITY (HO./1000 CUBIC NETERS) 0F ALL LARVAE COLLECTED BY CALAteAR HEEK AND YEAR AT RESERVOIR STAT 10tte i40RTil AtillA POWER STATI0tle VIRGIllIA. COVE OBLIQUE HEEK OF SAttPLE 1979 1980 1981 1979 1980 1981 MAR 1 . . . . . . HAR2 . . . . . . itAR 3 . . . . . . t!AR4 27 . 14 . . . HAR5 . . 651 . . 11
, AFR1 472 1995 1000 85 522 93 AFR2 1649 607 1214 360 1250 117 APR3 165 1364 108 11 358 38 - '
APR4 410 658 13184 64 234 118 APRS 172 . . 139 . .
!!AY1 838 822 478 1027 1349 319 MAT 2 4414 520 9533 3284 1833 554 O HAY 3 5465 2407 428 1505 1831 501 00
! t1AY4 Jutil 2380 7381 5625 2326 375 2596 1349 866 2457 1175 505 445 7 JUta: 17011 4429 1994 1426 1141 345 JLA43 16964 2466 1634 1165 429 189 JUti4 10918 5638 1432 714 1018 127 JtA15 . 5037 8108 . 66 85 JtlL1 3620 974 155 330 113 38 JUL2 2276 558 1071 350 55 106 JUL3 2508 . 1420 268 . 66 JUL4 3300 853 212 214 138 17 JUL5 1757 . . 164 . . AUG1 1502 . 270 53 . 15 AUC2 5615 . 458 60 . 36 AUG3 2000 . 226 50 . . AUG4 1354 . 34 4 . 8 AUG5 . . 31 . . . SEP1 38 . . 5 . . S OY e. II
TABLE 7-2 . DENSITY 4HO./1000 CUBIC NETERSI 0F ALL LARVAE COLLECTED BY CALMSAR 64EEK MD YEAR AT LAG 00tl
- STATI0ll. NORTH ANilA POWER STATIDit. VIRGINIA.
COVE 00LIQUE HEEK OF SAMPLE 1979 1980 1981 1979 1980 1981 NAR1 . . 16 . . . HAR2 . . . . . . HAR3 . . 30 . . 8 MAR 4 . 434 42 . 15 7 MAR 5 . 1111 33 . 94 13 AFR1 . 1393 2720 . 22 32 APR2 . 737 829 . 118 65 AFR3 . 531 95 . 220 355 AFR4 . 1090 1086 . 720 557 ftAY1 . 971 1488 . 965 1452 MAY2 . 3587 521 . 797 1177 MAY3 . 769 1268 . 2082 745 e MAY4 . 13123 809 . 1030 672 S$ JUtil 10910 8916 2940 670 1206 641 co Jutl2 16370 3034 907 744 964 233 8 jut 43 21561 6429 734 741 747 77 JUil4 4016 2276 403 257 406 103 Jutt5 . 1474 . . 260 . JUL1 3088 1855 353 322 78 51 Jut 2 2852 608 5069 241 33 130 JUL3 6728 895 3096 155 43 63 JUL4 4671 1078 199 361 48 50 JUL5 8433 . . 118 . . AUG1 3444 391 718 94 39 20 AUG2 4707 778 253 103 20 10 AUG3 5752 554 1254 123 . 10 AUG4 1369 161 327 30 . 6 AUG5 . . 9 . . . SEP1 89 9 . 3 . . SEP2 71 . . 3 . . SEP3 14 . . . . .
r . TABLE 7-3 . DDISITY (HO./1000 CUBIC NETERS) 0F LEPONIS SP. LARVAE COLLECTED BY CALAf0AR HEEK AtB YEAR AT LAG 00t41 STAT 10tl. HORTH AtatA POWER STAT 10H. VIRG1HIA. COVE OBLIQUE WEEK OF SANPLE 1979 1980 1981 1979 1980 1981 AFR4 . 549 . . . . ItAY1 . 97 4847 . . . t!AY2 . 14026 1596 . 148 . MAY3 . 438 1604 . 170 17 NAY4 . 606 260 . 178 19 Jt#11 33321 1376 718 300 155 192 Jutl2 64810 5443 800 68 183 . JtAll 16506 479 85 86 76 34 JLAl'+ 8591 5683 44 39 1155 51 Jt245 . 440 . . 649 . JUL1 3009 2098 216 . 86 172 JUL2 4507 55 2606 18 128 5 97, a JUL3 JUL4 15700 1318 212 409 2025 314 115 75 73 143 143 153 o JUL5 1465 . . 122 . . AUG1 2575 97 356 102 75 27 AUG2 3473 47 348 129 39 42 AUG3 6386 841 93 43 . . AUG4 4014 444 142 42 . .
. AUG5 . . 48 . . .
SEP1 435 . . 13 . . SEP2 172 . . 12 . . SEP3 66 . . . . . i B.
TA'BLE 7-4 . DEllSITY (HO./1000 CLEIC NETERS) OF LEP0t115 SP. LARVAE COLLECTED BY CALAtOAR HEEK AHD TEAR AT LAGOOH 2 STATI0tl, HORTH AttlA POWER STATION, VIRGINIA. COVE COLIQUE WEEK OF SANPLE 1979 1980 1981 1979 1980 1981 11AY1 . 520 . . . . i MAY2 . 12778 . . 93 . 11AY3 . 1645 4898 . . 25 18 ftAY4 . 45372 2361 . 538 . JLAll 34431 59722 4144 146 577 67 JUtl2 16272 7216 588 406 161 76 JLA13 70156 25864 238 123 26 18 - JUtM 5768 8639 86 92 76 17 JUll5 . 5890 . . 57 . JUL1 10960 788 932 69 60 14 jut 2 1887 619 6000 328 18 147 JUL3 1500 1782 4494 153 19 65 s JUL4 18684 694 438 61 . . $ O JUL5 24545 . . 135 . . AUG1 7106 1006 685 137 . 16 AUG2 1196 2209 425 45 20 . AUG3 17462 1157 1033 169 . . AUG4 3849 381 588 40 . . SEP1 33 47 . . . . SEl'2 208 . . . . . m
.O
_ . , _ . _ m __ i TABLE 7-5 . DEtISITY (HO./1000 CUBIC f1ETERS) OF LEPOMIS SP. LARVAE COLLECTED BY CALAICAR WEEK AfD TEAR AT LAGOOH 3 ST ATIDH, NORTH At4IA POL 4ER STATIOtl, VIRGIllIA, COVE OBLIQUE HEEK OF SAMPLE 1979 1980 1981 1979 1980 1981 MAY1 . . . . 24 . 11Af2 . 1796 . . 24 15 , itAY3 . 70 235 . 53 195 MAY4 . 20291 2176 . 642 . JUtil 21602 44492 19789 147 2432 50 JUtit 10368 2202 2365 1866 607 208 Jut 43 91055 12931 3636 197 145 50 ' Jutl4 13728 820 159 247 22 17 jut!S . 4228 . .
- 2S7 .
JUL1 6502 2465 441 19 90 33
. JUL2 3196 1377 851 116 40 50 JUL3 16357 1191 3322 274 . 60 ,
JUL4 6151 609 133 45 52 15 ra JUL5 7580 133 [D AUG1 2880 206 975 . 37 28 AUG2 2400 893 344 72 . . AU33 2538 519 2032 44 . 26 AUG4 276 . 265 . . 15 4 i N m. 11
o I l TABLE 7-6 . DENSITY (HO./1000 CLBIC t1ETERS) 0F LFPOP11S SP. LARVAE COLLECTED Bf CALAteAR 84EEK AtB YEAR AT
-ELK CREEK STATI0tt, HORill A!34A F0WER STATI0ll, VIRGIllIA. ,
l COVE OBLIQUE NEEK OF St.ItPLE 1979 1980 1981 1919 1930 1981 IIAY1 . 60 . . . . t4AY2 . 2346 . . 49 67 MAY3 . 111 376 . 24 35 MAY4 . 27828 156 . 169 59 JUtli 1860 23737 1782 1761 495 155 Jtal2 6926 2090 360 1321 66 157 JtAll 3677 4973 619 967 23 69 JUtl4 4618 1731 . 271 211 71 , JUlt5 . 517 . . 424 . JUL1 472 1737 117 . 136 30 JUL2 10228 43 437 640 22 92 JUL3 1047 864 2007 348 87 14 : JUL4 JUL5 1615 4620 84 75 234 76 N AUG1 921 239 108 133 18 28 8 AUG2 7349 265 130 120 19 . AUG3 1737 86 1406 167 . . AUG4 127 . 276 42 . 16 I j Web _ _ _ _ _ _ . _ . _ _ __ =
TABLE 7-7 . DEllSITY (HO./1000 CUBIC HETERS) 0F LEPortIS SP. LARVAE COLLECTED BT CALA> OAR WEEK AfD V5AR AT ttILLPate STATI0H.130RTH AtalA POWER STAT 10tle VIRGINIA. COVE 00LIQUE 54EEK OF sat 1PLE 1979 1980 1981 1979 1980 1981 ftAY1 . 57 . . . . MAY2 . 119 10$8 . 24 34 ft4Y3 . 191 4174 . . . t1AY4 . 52674 526 . 133 52 i Jutil 16721 5984 2130 274 216 68 JUtI2 41489 9762 2442 1109 1 76 423 JtR13 58251 23605 617 964 108 88
- JtA34 11264 2216 1724 161 81 506 jut 15 . 1118 . . 278 .
JUL1 4213 2378 . 19 150 13 JUL2 1937 1333 14597 239 18 63 JUL3 6163 553 3511 95 19 27 e JUL4 163 3562 177 2287 41 78 y' Jut 5 6176 . . 330 . . u AtEl 3657 478 1472 , 84 61 14 a ALE 2 8821 328 . 141 19 . AUG3 2784 190 1773 182 . 25 AUG4 317 95 426 28 . . O j - r
+
e E I
t i i TABLE 7-8 . DEt4SITY IHO./1000 CUBIC t1ETERS) 0F LEPortIS SP. LARVAE COLLEClEO BY CALA10AR HEEK AND YEAR AT LOWER RESERVOIR STATION. HORTH A!RIA F0HER STATI0tl VIRGINIA. COVE OBLIQUE WEEK OF . SAtlPLE 1979 1980 1981 1979 1980 1981 a llAY2 . . 44 . . . 11AV3 7538 . 33 29 . . HAY 4 2925 . 355 . . . 1 Jutti . 14837 . 9545 64 . 17 Jttl2 42673 . 11648 450 . 85 JLAll 46129 . 3849 227 , 118 jut t'+ 33358 . 2632 574 . 53 JUL1 14485 . . 29 . . JUL2 289 . 837 74 . 82 JUL3 2241 . 2300 644 . 100
! JUL4 6807 . 173 736 . 18 JUL5 2287 . . 125 . . 6 AUG1 2984 . 175 47 51 42 57 U
AUG2 3558 . . J:-
) AlfG3 465 . 213 . . .
AUG4 433 . 101 12 . . AUG5 . . 97 . . . SEP1 . . . 15 . . 1 1 i i i e-6 emme 1
~
i s TABLE 7-9 . DEtt51TY (HO./1000 CUBIC HETERS) OF LEPOMIS SP. LARVAE COLLECTED BY CALAPCAR WEEK A!C 1 EAR AT ttIDDLE RESERVOIR STATION, NORTH Al#4A POTTER STATION, VIRGINIA. ! COVE OBLIQUE WEEK OF SAnPLE 1979 1980 1981 1979 1980 1981 MAf2 60 152 . . . , , NAY3 5951 93 47 . . . MAY4 . 4833 401 41 189 20 JUH1 10893 2356 7892 286 667 72 JUtI2 553S5 7%5 934 794 353 161 JU:43 22036 4215 1417 652 91 75 JUIN 9598 11011 2035 271 98 249 Jutl5 . 5037 6108 . 51 113 JUL1 4840 974 282 104 203 45 JUL2 2303 555 307 280 55 34 jut.3 2900 . 1152 146 . 109 JUL4 2490 853 420 v9 138 17 : JUL5 . . . 412 . . U AUG1 . . 244 110 . 31 vi AUG2 . . 1115 99 . . AUG3 . . . 125 . . AUG4 . . . . . 13 J d Amu. O
=
i, TABLE 7-10. DEHSITY (10./1000 CLSIC NETERS) 0F LEP0NIS SP. LARVAE COLLECTED BY CALAleAR HEEK Me YEAR AT UPPER RESERVOIR STATIOH. HORTH MOIA POWER STATI0ll. VIRGINIA. COVE - OBLIQUE ., WEEK OF SAMPLE 1979 1980 1981 1979 1980 1901 1 I t1AY 3 73 . . . . . MAY4 . . 95 . . 19 JtH1 798 . 3463 50 . 193 JtA42 20135 . 84 8070 . 67 Jttl3 24870 . 1429 695 . 77 JtR14 10709 . 955 409 . 70 JUll 522 . 106 15 . . JUL2 7556 . 3548 697 . 259 JUL3 3377 . 780 260 . 26 JtJL 'e 7592 . 42 168 . 16 JUL5 1291 . . 242 . . AUG1 93 . 423 . . 14 s AUG2 7590 . 116 40 39
. 53 $
Ch AUG3 3700 . 471 . . 14 AUG4 2274 . . . . t j SEP1 78 . . . . - l 4 I 4 > w M
TABLE 7-11. DEtISITY (tc./1000 CUDIC NETERS) 0F LEPONIS SP. LARVAE COLLECTED BY CALAteAR HEEK Ate YEAR AT LAGOcti STATI0tl It0RTil A!2tA POWER STATI0tl. VIRGIttIA. COVE ODLIQUE HEEK OF SA!!PLE 1979 1980 1981 1979 1980 1981 NAR1 . . . . . . . It'R2 . . . . . . MtR3 . . . . . . IMR4 . . . . . . Mt.R 5 . . . . . . APRI . . . . . . AfM2 . . . . . . APR3 . . . . . . AFR4 . 99 . . . . ItAY1 . 146 -1035 . 4 . HAY 2 . 6064 518 . 67 24 ftAY3 . 480 2266 . 59 50 flay 4 . 29162 1096 . 323 27 Jitti 21382 25556 5746 563 731 105 e a J'J132 28894 5325 1237 932 241 174 y JL?t3 47159 13491 999 472 76 52 N JUtI4 2658 3955 403 160 296 131 ' JUtl5 . 2333 . . 331 . Jul.1 4854 1855 353 22 107 54 Jul.2 4461 732 5069 267 41 201 JUI.3 7985 895 3096 196 43 63 Jul_4 5627 1078 227 547 48 50 JUL5 8433 . . 153 . . . AUG1 3444 391 718 94 39 23 AUG2 4707 778 253 103 20 10 7UG3 5752 554 1254 123 . 10 AUG4 1666 161 327 30 . 6 AUG5 . . 9 . . . SEP1 89 9 . 3 . . SEI'2 71 . . 3 . . SEP3 14 . . . 4 . W W
TABLE 7-12. DENSITY (H0./1000 CUBIC HETERS) 0F LEPONIS SP. LARVAE COLLECTED BY CALAISAR WEEK Ala YEAR AT RESERVOIR STATION. HORTH At4IA POWER STATION. VIRGINIA. COVE OCLIQUE WEEK OF SAltPLE 1979 1980 1981 1979 1900 1981 iMR1 . . . . . . MAR 2 . . . . . . ItAR3 . . . . . . HAR4 . . . . . . HAPS . . . . . . APR1 . . APR2 . . . . . . APR3 . . . . . . APR4 . . . . . . AFRS . . . . . . H1Y1 . . . . . . t0tV 2 20 152 14 . . . HAY 3 4226 93 28 11 . . HAY 4 Jt241 1101 8405 4833 2356 307 6997 12 123 189 667 13 93 4 o JtA!2 39026 7945 3783 1001 353 101 y JtRl3 31769 4215 2201 507 91 89 JLEM 189',5 11011 1884 434 93 114 JtA t5 . 5037 8108 . 51 113 JUL1 6854 974 155 43 203 15 JtlL2 3511 558 1435 360 55 131 JUL3 2e42 . 1420 365 . e. Jtil 4 5783 853 212 351 138 17 JUL5 1757 . . 262 . . AUG1 1502 . 2 70 53 . 15 t tfG2 5615 . 458 60 . 36 f t!G3 20C0 . 226 50 . . AUG4 1354 . 34 4 . 8 AUF,5 . . 31 . . . SLP1 38 . . 5 . .
~
i i " e W e.
TABLE 7-13. DEllSITY IHO./1000 CtEIC METERSI 0F DOROSONA CEPEDIAtAM LARVAE COLLECTED BY CALMOAR kEEK MU YEAR AT LAG 00H 1 STATI0tle NORTH AtElA POWER STATION, VIRG114IA. COVE O6LIQUE HEEK OF sat!PLE 1979 1980 1981 1979 1980 1981 APR3 . 506 . . 615 . APR4 . 1524 . . 602 221 11AY1 . 1942 1528 . 2479 712 NAY2 . 195 235 . 394 73 HAY 3 . 250 189 . 6500 1252 NAY4 . 36970 43 . 6310 505 Jt:81 1155 741 . 422 1269 402 jut 42 1097 1899 . 17 2860 477 l JtN33 446 53 . 216 756 151 Jt284 369 . . 131 344 120 jug . 126 . . 619 . JUL1 44 225 29 40 JUL2 94
. 53 . 16 4
w JUL3 68 . . 201 . . W JUL4 . . . 75 . . M
.I TABLE 7-14. DEt!SITY 1940./1000 CUBIC NETERSI 0F 00ROSONA CEPEDIANUM LARVAE COLLECTED BY CALAteAR 6tEEK Ate YEAR AT LAG 00tl 2 STAT 10tl. HORTH AtalA PO14ER STAT 10tl, VIRG1HI A. COVE OBLIQUE
& LEEK OF S!JIPLE 1979 1980 1981 1979 1980 1981 i
APR3 . 115 . . 5% 49 APR4 . 491 42 . 1235 438 itAY1 . 405 673 . 1359 610 ' ttAY2 . 370 . . 2984 826 NAY3 . 197 449 . 3457 406 MAY4 . 1489 880 . 3548 883 JLH1 . 556 495 948 2837 1946 JLAl2 702 227 90 426 3687 365-JtR13 195 262 . 914 332 178 JUti) 137 314 . 277 101 67 JtAIS . . . . 86 . JUL1 51 . . 897 405 60 18 d o JUL2 . . . . JUL3 . . . 219 . . JUL4 33 . . 61 . . - JUL5 . . . 14 . . l t
~
W
TABLE 7-15. del 4SITY (110./1000 ClOIC METERS) DF DOROSOMA CEPEDIAtAM LARVAE COLLECTED BY CALAt0AR HEEK AfD YEAR AT LAGOOH 3 STATI0tl. Il0RTH AttlA PCHER STATI0tl VIRGIllIA. ' COVE MLIWE HEEK OF SAMPLE 1979 1980 1981 1979 1980 1981 , APR2 . . . . 71 16 APR3 . 3167 42 . 67 202 ArR4 . 3185 1266 . 1528 55 MAY1 . 2543 7311 . 2668 459 MAY2 . 20898 238 . 668 448 MAY3 . 8392 667 . 5395 1829 FMY4 . 6977 207 . 8413 19'e JLRll 2273 3155 127 1325 1694 1405 Jtill2 263 298 99 548 1367 363 JtRi3 36 1092 . 351 966 116 JtR44 179 164 . 521 200 52 JtRI5 . 67 . . 86 . a JULL JtJL 2 52 262 58 30 20 17
. y JUL3 . . . 29 . . 8 JtJL4 . . 44 14 . .
JUL5 . . . 24 . . AUG1 . . . . . 14 i e men e E9
l 4 TABLE 7-16. DEllSITY IHO./1000 CUBIC HETERSI 0F DOROSONA CEPEDIANUM LARVAE COLLECTED BY CALAlOAR HEEK Ate YEAR AT ELK CREEK STATICH, HORTH AlttA POWER STATION. VIRGItlIA. COVE OBL1quE WEEK OF SAtlPLE 1979 1980 1981 1979 1980 1981 ! APR3 . 361 132 . 333 1321 AFR4 . 491 556 . 756 1004 t1AY1 . 7006 772 . 3082 4538 IIAY2 . 4630 . . 2794 9882 t1AY 3 . 333 2676 . 2631 3099 ttAV4 . 3283 1554 . 3919 4277 Jttil 175 789 145 1673 3366 3115 Jtal2 . 395 . 899 2264 189 Jttl3 172 164 . 2956 2725 52 JulM 191 64 . 514 711 . Jt#;5 . 57 . . 133 . JUL1 . . . 362 . . j JUL2 . . . 165 22 18 c3 JUL3 . . . 70 . 14 7 AUG1 . . . . . 1
J TABLE 7-17. DENSITY IHO./1000 CUBIC ttEIERS) 0F 00R050nA CEPEDIAtut LARVAE COLLECTED BY CALAtWAR HEEK Ale YEAR AT ttILLPotB STATION, HORTH AttlA POWER STATION. VIRGINIA. COVE ODLIQUE , sat 1PLE 1979 1980 1981 1979 19&O 1981 APR2 . . . . 25 . APR3 . 115 43 . 165 363 AFR4 . 8266 1210 . 2695 1172 MAY1 . 3046 2825 . 1507 4167 ftAY2 . 1905 1293 . 5450 2218 11AY 3 . 1083 3807 . 6074 2404 ftAY4 . 909 895 . 5141 2953 - JUtli 41 615 217 1463 1o02 1263 JUtl2 255 1012 . 912 :308 266 JUtt3 3'42 1395 44 1240 2694 18 Jul!4 36 60 . 350 1129 35 JUll5 . . . . 51 . 8 JUL1 JUL2 93 105 42 6S6 404 50 u - JUL3 . . . 41 . . 4 4 + M f 5 11
TABLE 7-18. DDISITY (H0./1000 CUDIC ttETERS) 0F DOROSONA CEPEDIAIAkt LARVAE COLLECTED BY CALAtDAR NEEK A10 YEAR AT LOWER RESERVOIR STATIDH, NORTH AlalA POWER STATIott, VIRGIri1A. COVE 00LIQUE WEEK OF SANPLE 1979 .1980 1981 1979 1980 1981 APn3 . . . . . 33 APR4 . . 200925 . . 170 APR5 74 . . 140 . . MAY1 4570 . 388 1762 . 96 NAY2 2727 . 30219 3273 . 567 HAV3 4885 . 83 3009 . 155 NAY4 79 . 118 1298 . 110 JLAll 2683 . 1364 971 . 494 JLR32 139 . 307 414 . 306 JtAl3 251 . 669 2C28 . 101 JLA:4 255 . . 660 . 53 JUL1 294 . . 417 . 31 e
' JUL2 . . . 118 . . y JUL3 . . . 121 . . 4-41 JUL4 . . . . .
JUL5 . . . 13 . . M 4 4 5
TABLE 7-19. DENSITT (HO./1000 CUBIC ttETERS) 0F DORO50ttA CEPEDIANUtt LARVAE COLLECTED ST CALAICAR NEEK Ale YEAR AT MIDDLE RESERVOIR STATION HORTH Alem POWER STATION. VIRGINIA. COVE COLIQUE WEEK OF e l SAttPLE 1979 1980 1981 1979 1980 1981 I . APR4 . 1244 521 . 114 19 AFRS 2 34 . . 220 . . MAY1 279 573 86 3436 2773 729 t1AY2 4277 1421 7848 8911 5202 539 11AY 3 242 % 9065 930 5982 1831 690 NAV4 6500 12000 96 2 6256 4725 1519 JUH1 6905 4533 1883 2965 2786 396 JLA32 529 913 39 4464 1929 1127 Jutt3 3167 717 . 1658 ' 766 241 JLAM 115 266 . 958 1937 68 Jutt5 . . . . 81 57 JUL1 160 704 60 JUL2 61
. 582 19
. 17 d
o JUL3 JUL4 259 66
. . y O
M pe M # T A j -+ g 4 $ e ll - '
/ , - --
f i -- - .i - g ;,, . ,
..+"
'.--.- ,-- ~,, i.
, ,, -) _,
. . ~ .
t ,-
,-9 _ , .
//
9, 6
- p. ,
f r , i ', (
' ~o '
TA8tE 7-20. DENSITY (NO.'/1000 CtBIC HETER $l 0F DDR050MA CEPEDIMAM LARVAE COLLECTED ST CALMCAR WEEK Ate YEAR AT - ' UPPER' RESERVOIR STATIDH. HORTH Att44 POWER STATI0lte VIRGINIA. r ia 1 - i . -v p s a j '
~-
COVE DELIQUE ' WEEK OF
/
SAMPLE ' 1979 1960 1961 1979 1960 1961 f ^',
~
, APR4 . . 1197 . . 16 ,
, APRS 157 '
. . 75 . . .
MAY1 loco . 509 1976 . 53 NAY2 30559 . -30664 10295 . 2237 ,, MAT 3 3491 . % 72 2394 . 16t9 8%it '2729 . 333 2045 . 1779 -- JUH1 16236 . 1775 1866 . 2757 Jul:2 476 . 252 2246 . 943 Jul!3 3309 . 873 1731 . E47 JUH4 18u50 . 45 1535 . 281 JULI_ 634 . . 762 . 16 JUL2 370 . . 392 . . e
'JUL3 ..,1558 . . 145 . 13 y JUL4 33 ~. . 126 . . m JUL5 . .- . 13 . .
G M 9 M
TABLE 7-21. DEffSITY INO./1C00 CLTIC 11ETERS) 0F DOROScr1A CEPEDIAtast LARVAE COLLECTED BY CALAtEAR HEEK AFC YEAR AT LAC 00H STATION. NORTil AtelA F0HER STATI0ll VIRGIIIIA. COVE COLIQUE WEEK OF sat 1PLE 1979 1980 1981 1979 1980 1931 81AR1 . . . . . . 11AR2 . . . . . . ItAR3 . . . . . . ItAR4 . . . . . . . ItARS . . . . . . A PR1 . . . . . . AT172 . . . . 19 3 APP 3 . 872 44 . 355 3S2 APR4 . 2887 605 . 1400 563 MAY1 . 2923 2547 . 2227 2039 ItA12 . 5720 300 . 2476 2700 81AY3 . 18 % 1505 . 6028 1789 NAY4 . 10201 656 . 5470 1775 JUNI 687 1141 196 1169 2175 1629 8 Jt242 473 744 38 556 " 2263 332 o
. 2 83 236 573 9 1150 1559 103 N Jull4
- 185 1:5 . 355 517 55 Jul15 . 51 . . 188 .
JUL1 34 . . 495 34 8 JUL2 49 9 . 215 12 Il JUL3 13 . . 113 . . JUL4 7 . 8 29 . . JUTS . . . 8 . .
#tG1 . . . . . 6 At%: . . . . . .
AU33 . . . . . . AUG4 . . . . . . AUG5 . . . . . . SEP1 . . . . . . CEP2 . . . . . . SEP3 . . . . . . e
.e
TABLE 7-22. DENSITY IHO./1000 CUBIC PIETERS) 0F DOROSortA CEPEDIAHurt LARVAE COLLECTED Bf CALMEAR WEEK Alm YEAR AT RESERVOIR STATION. HOR 1H A184A F0HER STATION, VIRGINIA.
. COVE OBLIQUE HEEK OF sat 1PLE 1979 1980 1981 1979 1980 1981 ilAR1 . . . . . .
itAR2 . . . . . . 11A23 . . . . . . ttLR4 . . . . *
- ttARS . . . . . .
AFR1 . . . . . . APR2 . . . . . . APR3 . . . . . 11 AFR) . 1244 30404 . 114 69 AFRS 143 . . 134 . .
#1411 2288 573 324 1921 2773 288 titV2 12358 1421 23324 7388 5202 1156 IIAT 3 8868 9065 1270* 3518 1831 853 ftAV4 2738 12000 494 2934 IE52 4725 2786 1116 1219 O
o JUH1 8996 4533 1667 JUH2 445 913 206 2576 1929 766 789 2e5 7 JLAI3 2159 717 510 1E22 JtTN 7096 266 15 994 1937 119 JLAIS . . . . 81 57 JUL1 385 . . 617 19 36 JUL2 154 . . 339 . 5 JUL3 548 . . 170 . 4 JUL4 12 . . 73 . . JUL5 . . . 8 . . AUG1 . . . . . . AUG2 . . . . . . AUG3 . . . . . . AUG4 . . . . . . AUC5 . . . . . . SLP1 . . . . . .
.m e.
TABLE 7-23. DEPEITY EHO./1000 CtBIC r1ETERS) OF 810RONE Al1ERICAN4 LARVAE COLLECTED BY CALAPSAR WEEK Ate YEAR AT LAGOOH 1 STATION. HORTil Af88A POWER STATICH. VIRGINIA. 2 COVE C3LIQUE HEEK OF sat 1PLE 1979 1960 1961 1979 1960 1961 APR3 . 56 . . 137 134 t
- APR4 . 427 . . 139 490 t
MAY1 . 340 393 . 744 8t0 1 ttAT 2 . 195 94 . 197 109 j MAY3 . 63 . . 262 220 I tttY'e . 253 . . 178 19 4 JtAll . 53 . 41 . 17 JL482 . . . . 20 16 JtA13 . . . 34 , ,
%.a O
LO I i i 1 i i === [ l e me W v
)l
TABLE 7-24. DENSITY (HO./1000 CtBIC PIETERS) 0F NORot4E AMERICANA LARVAE COLLECTED BY CALAISAR WEEK Ate YEAR AT LAGOG4 2 STATIDH. HORTH At#4A POWER STATION. VIRGINIA. COVE 00LIQUE WEEK OF ! SAltPLE 1979 1960 1981 1979 1960 1961 j APR3 . 57 53 . 206 49 APR4 . . . . 93 337 M4Y1 . 231 433 . 184 675 NAY2 . 185 . . 233 723 i 114Y 3 . . 41 . 222 404 ) itAV4 . . . . 43 101 JUH1 . 56 . . . 50
# 82 . . . . 46 .
i O Ub. O e 4 M E m'@
.- -. . - . . . _ .- . - ~ . _ - _ . . . = . - - - . . - . - - --
b l 3 l TABLE 7-25. DENSITY IHO./1000 CL2IC t1ETERS) 0F 110RONE Ai1ERICAHA LARVAE COLLECTED BY CALAICAR HEEK AfD YEAR AT LAGOOH 3 STATI0H. NORTH Af#tA Put:ER STATI0tl. VIRGINIA. i l COVE COLIQUE llEEK OF SA!1PLE 1979 1960 1981 1979 1980 1981 1 l APR2 . . . . 261 .
- APR3 . 333 42 . 224 64
[ APQ4 . 242 873 . 625 4?6 , N4Y1 . 173 47 . 216 13 5 litT2 . 8?8 286 . 22$ 541 i MAY3 . 350 78 . 237 253 11AY4 . 233 104 . 199 129 JLAIL . 53 . 15 . 182-Julf2 . . . . . 16 ' Jul3 . . . . 24 . I e w I " m a t I O i I d l J , M b e 4 O
?-
t I - f l i i, I TABLE 7-26. DENSITY IHO./1000 Ct.eIC HETERSI 0F tt0ROHE AMERICAHA LARVAE COLLECTED BY CALAleAR WEEK Ate TEAR AT I ] ELK CREEK STATIGH. HORTH ATRIA POWER STATIOH. VIRGIllIA. 1 l l f COVE ceLIQUE l HEEK OF t sat 1PLE 1979 1960 1961 1979 1960 1981 i
)
1 APR2 . . . . 23 33 l APR3 . . 176 . 346 703 l APR4 . 123 2094 . 50 929 l HAY 1 . 359 163 . 44 366 i NAY2 . . . . 25 252 I
, HAY 3 . 111 . . 98 15$ ;
4 81AY4 . 51 . . . 43 I JUtil 35 53 . . 25 . l i JLAl2 . . . . 22 . I e i w a
. [
4 f f i i I 3 t
- l
1 TABLE 7-27. DENSITY (MO./1000 CUBIC HETERS) 0F HORONE At1ERICAHA LARVAE COLLECTED BY CALAFCAR NEEK Ale YEAR AT NILLPole STATI0H. HORTH At444 POWER STATIDH, VIRGIll!A. COVE COLIQUE HEEK OF SAMPLE 1979 1980 1981 1979 1980 1981 APR2 . . . . . 18 AFR3 . . 174 . 71 3:9 APR4 . 116 3629 . 63 S'e 9 NAY1 . 115 56 . 46 818 HAY 2 . 119 544 . 118 137 iMV3 . . 92 . 25 202 HAY 4 . . . . sj 79 JLAll . . . . 43 51 B Ub m A 4 8 a m .j H
I TABLE 7-28. DENSITY IMO./1000 CtBIC HETERS) 0F HORONE AHERICANA LARVAE COLLECTED BY CALAICAR WEEK MB YEAR AT LOWER RESERVOIR STATION HORTH Aft 4A POWER STATI0tl. VIRGINIA. 1 COVE OBLIQUE 84EEK OF , SA1PLE 1979 1980 1981 1979 1980 1981 AF93 . . . . . 50 APR4 43 . 24185 . . 221 APRS 111 . . 47 . . g HAY 1 137 . 474 60 . 2 72 NAY2 . . 8421 . . 76 K4Y3 . . 50 58 . 34 NAY4 . . . 50 . 74 JtJill 122 . 41 . . 17 JUH2 . . . 18 . . JUL2 . . 44 . . . s e e m 1
TABLE 7-29. DEllSITT IHO./1000 CtBIC HETER $3 OF HORONE AttERICAt44 LARVAE COLLEC1ED BT CALAtOAR WEEK Ato YEAR AT F1T00LE RESERVOIR STAT 10tl. Il0 RIH AIBIA FOWER STATI0tl VIRG1tlIA. COVE 03LIQUE HEEK OF SAttPLE 1979 1980 1981 1979 1980 1981 APR 3 . 119 184 . 358 17 . AFR4 258 1005 2117 113 572 206 AFR5 175 . . 465 . . t1AY1 . 396 1164 312 813 990 NEY2 663 102 1031 267 212 286 NAY3 1534 93 605 88 . 38 HAY 4 278 . 144 204 . 59 JUlt! . . . 20 . 18 JUll2 48 . . ,
, . 40 e
m e M _ _ _ _ _ _ _ ___.__d
9 TABEE 7-30. DENSITY IHO./1000 CUBIC t1ETERS) 0F HOROHE AMERICANA LARVAE COLLECTED BT CALAtDAR NEEK AfD YEAR AT UPPER RESERVOIR ST4 TION. PERIH AlalA POL 4ER STAT 10H, VIRGINIA. COVE OBL1QUE HEIK OF SAMPLE. 1979 1960 1961 1979 1940 1981 , , APR4 . . 5043 . . 74 A PR5 116 . . 45 . . H4Y1 42 . 231 79 . 125 NAY2 62 . 605E 74 . 50 NAY3 . . 122 15 . 84 t1AY4 . . . 32 . . JLAll . . 43 . . 35
' Jutl2 . . . . . 33 e
%,*3 m
b e
\
w l l -
TA6tE 7-31. DENSITY IHO./1003 CUBIC NETERSI 0F HOROHE AtlERICM4A LARVAE COLLECTED BY CALMcAR *dEEK Me YEAR AT LAGOON STATI0H.140RTH MC.A PG4ER STATI0ll. VIRGINIA. COVE , OBLIQUE - WEEK OF + SAftPLE 1979 1980 1981 1979 3980- 1981 MAR 1 . . . . . . ISAR2 . . . . . . NG3 . . . . . . HAR4 . . . . . . HARS . . . . . . AFR1 . . . . . . AIT2 . . . . 57 10 APR3 . 92 67 .' 162 257 AFR'e . 187 1318 . 194 552 ttAf1 . 246 224 . 256 815 flay 2 . 283 166 . 158 358 HAY 3 . 101 44 . 168 F51 MAY4 . 106 20 . 95 77 JU!Il 8 40 . 11 15 61 8 JUtl2 18 "
. . . . 6 Jui3 . . . 3 5 . N JUM . . . . . .
JUtt5 . . . . . . JUL1 . . . . . . JUL2 . . . . . . JUL3 . . . . . . JUL4 . . . . . . JUL5 . . . . . . Al1G1 . . . . . .
#UG2 . . . . . .
AU33 . . . . . . AUG4 . . . . . .
/LCS . . . . . .
5701 . . . . . . SEP2 . . . . . . SL P3 . . . . . . M
.3 I
-- m.. __ . . _ . .
TABLE 7-32. DENSITY (10./1000 Ct2IC METERS) OF ft0ROf4E AMERICAt4A LARVAE COLLECTED BY CALAtWAR WEEK AfD YEAR AT RESERVOIR STATION, NORTH Al34A pct:ER STATIOtl, VIRG1941A. COVE OGLIQUE MEEK OF sat 1PLE 1979 1980 1981 1979 1980 1981 M *R1 . . . . . . MAR 2 . . . . . . tuo3 . . . . . . . HAR4 . . . . . . HARS . . . . . . APR1 . . . . . . , AFRt . . . . . . AF'R 3 . 119 62 . 358 23 A5114 76 1005 9531 29 572 160 AFR5 129 . . 145 . . t1AVI 71 396 632 134 813 453 NAV2 244 102 5233 104 212 139 ftAY3 358 93 179 49 . 14S ftAY4 74 . 51 87 . 45 8 Jul41 44 . 29 6 . 23 D JUtl2 15 9 g4 m Jt211 . . . . . . Jt C H . . . . . . JUtIS . . . . . . JUL1 . . . . . . JLtl 2 . . 16 . . . JUL3 . . . . . . JUL4 . . . . . . JUL5 . . . . . .
. AUG1 . . . . . .
AUG2 . . . . . . AUG3 . . . . . . AIC4 . . . . . . AtWs . . . . . . SIP 1 . . . . . . k
.a #
_ _. . . _ _ . _._._.m..__.. __ . _ . _ _ . _ _ _ _ __ _. TABLE 7-33. DENSITY INO./1000 CUBIC NETERSI 0F PERCA FLAVESCERIS LARVAE COLLECTED SY CALAfDAR HEEK Ate YEAR AT LAGOOH 1 STATI0tte la0RTH Af0tA PO*lER
. STATION. VIRGINIA.
i
- COVE 00LIQUE HEEK OF SA!!PLE 1979 1980 1981 1979 1980 1961
[ 1 MAR 1 . . q$ , , , j HAR3 . . 91 . . . NAR4 . 247 143 . . . . NCS . 909 40 . . 18 AFR1 . 4444 13:31 . 38 63 APR2 . 2556 1000 . 24 100 APR3 . 730 76 . . . i a I e ten I I a l 1 4 1 ames
- O e
a a 5 1 ___ . _ _ _ _ m
_ __ . __ .. __ . . _ _ . _ _ _ . .- _ _ _ _ . - __ _.m.. . _ _ . . . . _ . . _ _ . _ _ . _ . ._ _ ___e _ _ _ _ _ _ _ _ _ i t 1ABLE 7-34. DEt4SITY ING./1000 CtmIC HETERS) OF PERCA FLAVESCENS LARVAE COLLECTED Bf CALAtOAR blEEK APO YEAR AT LAC 00H 2 STAT 10H HORTil A!33A POWER STATION, VIRGINIA. 4 l
. COVE ceLIQUE ! HEEK OF sat 1PLE 1979 1960 1961 1919 1980 1981 NAR1 . . 43 . . .
NAR3 . . 79 . . . I!AR4 . 791 . . 47 . MARS . . . . 51 . APR1 . 1337 340 . (S 76 APR2 . 678 1216 . 90 52 APR3 . 287 . . 23 . 1 , f 445
- w O
e k i 6 f i l 2 I l W .i != i 1 .
. . _ . _ . ._ m . _ _ . . . _ __. . _ . _ . _ . . _ _ _ _ . . _ . _ _ _ , _.___m ._ _ . _ __. _ . _ . . _ _ _ _ .__ . _ _ _ . . . _ . . . .. _ _ . _ .
9 1
- TABLE 7-35. DEN 5ITY IHO./1000 CUBIC METERS) OF PERCA FLAVESCENS LAkVAE COLLECTED BY CALAISAR WEEK AIS TEAR AT i LAGOOH 3 STATION. HORTH AltlA POWER STATION. VIRGINIA.
T WEEK OF sat 1PLE 1979 1960 1961 *1979 1980 1961 i IAR3 . . , , , 3, IM4 . 389 . . 3 gy . tuRS . 4072 119 . 300 . APRI . 361 492 . 27 18 APR2 . 63 909 , 43 379 AIlt 3 . 1389 167 . *
- APR4 . 40 . . . .
e j w PJ 4 1' d I i w m
. _ _ - - _ . - . . - . - , _~ _ . - . . - , - _ _ . - . . . . . . .- _ _ _ . _ . ... -. _ c d
4 i TABLE 7-36. OENS!1Y (HO./1000 CUBIC METERS) 0F PERCA FLAVESCENS LARVAE COLLECTED BY CALAteAR WEEK AIS YEAR AT ELK CREEK STATI0tl, NORTH Af24A P0;iER STATIort. VIRGINIA. COVE OBLIQUE WEEK OF sat!PLE 1979 1980 1961 1979 1980 1931 11AR4 . 270 . . . 21 t1ARS . . . . 24 31 , APR2 . 52 1937 . 390 93 - APR3 . . . . 24 .
=
AFR4 . 61 . . . . tab 4 N r N i e i
" e I
w e e m_
.,_m -_ . - - . - . . _ _ - . . _ . . . . _ _ _ _ _ ..-m__
P I I TABLE 7-37. DEt45ITY (HO./1000 CUBIC NETERSI 0F PERCA FLAVESCElis LARVAE COLLECTED BY CALAFCAR WEEK Ale YEAR AT MILLPole STATIDH. HORTH At01A POWER STATIOlle VIRGINIA. s ) CCVE OBLIQUE 6'EEK OF StJ1PLE 1979 1960 1961 1979 1980 1981
- KAR3 . . . . . 20 ttAR4 . 468 45 . . .
ettRS . 783 . . 101 17 . , APRI '
. 854 41 . . .
APR2 . 201 . . . la . APR3 . 115 43 . . . , APWe . 58 . . . . j s -
, W t M
W I i M
-me I
( J
. _ - . . _ . . _ . . _ _ _ _ . _ . . _. - _ _ _ . _ . . . _ . _ . _ _ . . . _ _ _ _ . _ . . _ . , _ ,. .m. _ _ __ . . _ _ _ _ _ ___ . . . _ . . _ _ . _ ..___.m_. ._
TABLE 7-38. DENSITY (HO./1000 CUDIC 11ETER$10F PERCA FLAVESCHIS LARVAE COLLECTED St CALANDAR WEEK AND YEAR AT . , LOWER RESERVOIR STATION N3RTH AINA POWER STATIGN, VIRG1HIA. I COVE ceLIguE
$4EEK OF St!!PLE 1979 1964 1981 1979 1930 1981 ,
itAR4 108 . 41 . . . APR1 796 . 1618 117 . . APR2 84 . 391 156 . 43 l AFR3 . . 47 . . , APR4 601 . . 53 . . t 8 W N B i e t M i W
= i
.i p t
__ _ - ._. _ _ _ _ _ . _ ._ _ . __m _ m I
+
TA8LE 7-39. DENSITY (HO./1000 Ct2IC METER $10F PERCA FLAVESCENS LARVAE COLLECTED BT CALMSAR HEEK AIS )[ AR AT HIDDLE RESERVOIR STATION. HORTH M84A POWER ST ATION. VIRG1HIA.
- COVE OBLIQUE HEEK OF SAr1PLE 1979 1960 1981 1979 1960 1931 ftARS . . . . . 17 AFR1 . 1995 302 . 522 37 i
AFR2 5172 607 1749 245 1150 135 AFR3 279 2609 . . . 69 AFR4 1161 287 33 28 16 . 5 ! I O Un N An B L e f i i 4 I ese e et
, . _ - __. .m ._. __.m _ _ _ _ ._ . . . _ _ - _ _ __ _ . . _ _ _ _ .. .
TABLE 7-40. DENSITY (HO./1000 CUBIC ttETERS) 0F PERCA FLAVESCENS LARVAE COLLECTED BT CALAtOAR HEEK AfD YEAR AT , UPPER RESERVOIR STATIDH. I:CRTH At#4A PoutR STATION, VIRGINIA. DBLIWE WEEK OF SA*1PLE 1979 1980 1961 1979 1980 1981 r1ARS . . 2026 . . 16 APRI 116 . 1314 50 . 243 AT'R 2 656 . 1629 604 . 175 AFR3 255 . 92 29 . 18 i APR4 219 . 171 62 . . APRS 510 . . . . . 11AY1 84 . . . . . 1 I W N s l i I
TABLE 7-41. CENSITY (HO./1000 CUBIC NETERS) OF PERCA FLAVESCENS LARVAE COLLECTED Cf CALAtt)AR WEEK AM) YEAR AT LAGOON STATION. HORTH AfflA POWER STATI0tl. VIRGINIA. i i COVE OBLIQUE WEEK OF SAltPLE 1979 1960 1981 1979 1960 1981 NAR1 . . 16 . . . HAR2 . . . . . . ItAR 3 . . 30 . . 8 ftAR4 . 434 42 . 15 7 ttARS . 1111 33 . 94 13 APR1 . 1393 2720 . 22 32 AFR2 . 737 829 . 114 91 APR 3 . 516 61 . 9 . Ai124 . 33 . . . . ItAY1 . . . . . . mat 2 . . . . . . MAY3 . . . . . . tIAY4 . . . . . . JUH1 . . . . . . t 4. Jtni2 . . . . . . t JL443 . . . . . . N
- JtAM -
! Jta!5 . . . . . . JUL1 . . . . . . JUL2 . . . . . . . JUL3 . . . . .
- JUl4 '
l . . . . . . i JUL5 . . . . . . AUG1 . . . . . . AUG2 . . . . . . AtJG3 . . . . . . ALE 4 . . . . . . AUG5 . . . . . . SEP1 . . . . . . SEP2 . . . . . . SEP3 . . . . . . 4 9 9 1 m -
_ _ .. _ _ . _ . ._m._ TABLE 7 42. DEllSITY ING./2000 CtSIC HETER $1 OF PERCA FLAVESCCHS LARVAE COLLECTED BY CALAl0AR WEEK AfD YEAR AT ' RESERVOIR STATION. HORTil AtatA PtXIER STATION. VIRGIllIA. COVE 00LIQUE HEEK OF SAMPLE 1979 1980 1961 1979 1980 1981 MAR 1 . . . . . . tuR2 . . . . . . HAR3 . . . . . . NAR4 27 . 14 . . . HARS . . 651 . . 11 APR1 472 1095 1000 C5 522 93 AFR2 1649 607 1214 360 1250 117 APR3 165 2609 46 11 . 29 APR4 574 287 65 51 16 .
. APR5 187 . . . . .
MAY1 26 . . . . . HAY 2 . . . . . . MAY3 . . . . . . NAV4 . . . . . . e JUll! . . . . . . W g Jul12 . . . . . . cx2 JtRl3 . . . . . . ' Jttl4 . . . . . . Jutl5 . . . . . . JUL1 . . . . . . JtJt 2 . . . . . . JUL3 . . . . . . JUL4 . . . . . . JUL5 . . . . . . AUG1 . . . . . . AUC2 . ) . . . . . AUG3 . . . . . . AlfG4 . . . . . . AUG5 . . . . . . SEP1 . . . . . . I I
- a. m I
l
.au.
l l
TABLE 743. DEllSITY 8HO./1000 CtBIC NETERSI 0F PONOXIS HIG90NACULATUS LARVAE COLLECTED Bf CALAtl0AR WEEK AtB YEAR AT LAGOUH 1 STATI0ff HORTH Al24A POWER STATI0ll, VIRGINIA. COVE OBLIQUE WEEK OF sat 1PLE 1979 1980 1981 1979 1900 1961 AFR3 . 56 . . . . ItAY1 . 146 . . 83 . IIAY: . . . . 25 . ItAY3 . 63 . . 24 . ItAY4 . . . . 18 . JtAIL . . . 14 . . i Jul83 37 . . . . .
- JtAl4 34 . . . . .
I 1 e t W PJ W I 9 N
=
M se Q
) .
_ _ . _ .. _ . .. ._ _ . . _ _ _ _ . . _ . . _ . . _ . . _ _ _ _. . . - . _ . .__.-_.m.____ __ _ . . .. . _.___.m_m . _ . _ _ ___o . _ . _ . . _ . . . . . . _ . TABLE 7-44. DENSITY IND./1000 CUBIC ttETERS) 0F PONOXIS HIGROMACULATUS LARVAE COLLECTED Bf CALAFEAR HEEK Ale YLAR AT LAGOON 2 STATION. HOR 06 AlstA POIER STA110H VIRGINIA. I COVE COLIQUE HEEK OF SAtlPLE 1979 1960 1981 1979 1960 1981 AFR4 . 429 . . . . HAY 1 . 983 . . 23 . H&f2 . 247 . . 23 . HAT 3 . 197 82 . . . itAY4 . 160 . . . . a W W O a S t I
- g i =
?
_ . _ _ _ __ . . . -z . - - - _
- m. . _. _ -. . _ . -
m___ . _ _ . __ . .. _ . __ ___________-m_.. 1 l TA8tE 7-45. DENSITY (NO./1000 CtBIC f1ETERSA 0F POMOXIS HIGROMACULATUS LARVAE COLLECTED BY CALAPEAR HIEK Are YEAR AT i LAGOON 3 STATION. teRTH AttlA POWER ST ATION, VIRGINIA. .I I COVE CStluJE g WEEK OF 1 sat 1FLE 1979 1960 1981 1979 l'980 1961 ; , APa 3 . 56 . . . .
! AFR4 . 121 44 l
NAY1 . 116 47 . . . ' ! tt&Y2 . 539 . . . . itAY3 . 350 . . . . ; ttAf4 . . . . 22 16 ; , JLAll . . 42 . . . f 3 auNs . . As . . . t 6 I W w. w e I 4 L i . I 4 k J I 1 r 4 } l I l s
, 7 - r --- - , , . . -,
- . . . . _ . _ - _ -~ - - - .- .-. ._,-- . - - - - _ . - . , . . - -
. - - - . ~- .. ~ . - . . - - - . .-
1
- . t 4
1 l TABLE 7-46. DENSITY EHQ./1000 CtBIC NETERSI DF POMOXIS HIGR0 MACULATUS LARVAE COLLECTE0 BY CALAMAR WEEK A!O YEAR AT q ELK CREEK STATI0tl NORTH Att4A POWER STATION. VIRG1HIA. 4 i L COVE COLIQUE C NEEK OF i SANPLE 1979 1980 1981 1979 1984 1981 , MAY1 . 184 . . . . i
- HAY 3 . . 47 . . .
i NAY4 . 3 101 . . . . I i e l w f w ! N i e i l. 5 1 h* d i M 1
. . . - ... .- - . _ . _ . . - . . _ - . - _ . - . - _ . ~ - - .
=.i TABLE 7-47. DEt451TY INO./1000 CUDIC 41ETERS) DF PONOX15 HIGR0t1ACULATUS LARVAE COLLECTED Bf CALADCAR HEEK AND YEAR AT HILLPOlO STAT 10tl. HORTH AtalA POWER STATI0lle VIRG1HIA.
COVE OBLIQUE I HEEK OF sat 1PLE 1979 1980 1981 1979 1980 1981 APR4 . 1387 . . 21 . MAY1 . 517 113 . . . - MAY2 . 60 68 . . . HAY 3 . 64 . . . . Jutti . 41 . . . . JUH3 . 58 . . . . t
. W W ,
W G M O
- e M
1 . k V I,',
~
H .
- - .e
- . - , . ~ . . . ..-. .- . - _. . .. _ ._ .. .-. - - - - - ._. - . . . , . -
y y . f_
~
._s
-.. f
{ '% I A t.- p - TABLE 7-48. OENSI1Y IHO.'M000 CLEIC ttETERSI 0F pot 1CX15 HIGRONACULATUS LARVAE COLLECTED BY CALAlmAR HEEK AIO TEAR AT ' I ' ' - LOWER RESERVOIR STAT 10tl, HORTH AINA POWER STATION, VIRGIllIA. , '~ COVE UBLIQUE WEEK OF -- SA!1PLE 1979 1960 1981 1979 1980 1981 t APR5 Ill - . . . . .
' 16 I
MAY1 103 . . . . IIAY2 61 . . . . . H&Y3 . . 17 . . . MAY4 . . 414 . . . jut 81 . . 41 . . . i e 8 W W P I . L r i l' [ i t M I W l
.I TABLE 7-49. DENSITY (HO./1000 CUBIC HETERS) 0F Put10XIS HIGROMACULATUS LARVAE COLLECTED BY CALAICAR WEEK AfD YEAR AT tt!DDLE RESERVOIR STATI0ti. IORIH Att4A POWER STATIOH. VIRGINIA. OBLIQUE WEEK OF SAf!PLE 1979 1980 1981 1979 1960 1981 APR4 . 96 2313 * *
- AFR5 58 * * * * >
11AY1 503 149h *
- itA T2 60 406 4h *
#1AY3 123 374 140 * *
- t!A14 . 42 ' * *
- JLR11 . 89 * . 71 .
e W V1 4 1 3 4 M
.O O
. --. ._.. . . _ . - - - _ -_-- - .. . - . . . - - . - . = _ . .
i i i TABLE'7-50. DEllSITY (NO./1000 CUBIC NETERSI DF PONOXIS HIGRONACULATUS LARVAE COLLECTED BY CALAleAR WEEK Ata YEAR AT UPPER RESERVOIR STATION, HORTH A184A POWER STATION VIRG1HIA. i i COVE OBL1QUE WEEK OF SLMPLE 1979 1980 1931 1979 1980 1981 I!AY1 84 . . . . . j NAY2 1801 . 39 18 . IT tt'.Y4 . . .429 . . . Jiall . . 43 . . . JuN 35 . . . . . l a w W s 6 1 M M
TABLE 7-51. DEt4SITY (H0./1000 CUBIC ttETE 5 8 0F PONOXIS HIGR0f1ACULATUS LARVAE COLLECTED BY CALAM)AR WEEK Atc YEAR AT LAG 00tl STATI0tl, HORTH Ate 4A POWER STATI0ti, VIRGINIA. COVE OBLIQUE REEK OF SAflPLE 1979 1980 1981 1979 1980 1981
! t1AR1 . . . . . .
HAR2 . . . . . . tLiR 3 . . . . . . It'J14 . . . . . . MAR 5 . . . . . . AVR1 . . . . . . AFR2 . . . . . . APR3 . 23 . . . . APR4 . 373 8 . 5 . MAY1 . 301 28 . 22 . NAY2 . 172 10 . 10 . 4 MAY3 . 126 26 . 5 . NAY4 . 53 . . 8 3 JUtil . 10 9 3 jut 12
.d
. . . . . . u JUH3 Jui34 7
7 11 9 y Jtt!5 . . . . . . JUL1 . . . . . . - JUL2 . . . . . . ' JUL3 . . . . . . mt. Jut 5 i AUG1 . . . . . . AUC2 . . . . . .
#1'G 3 . . . . . .
. AUG4 . . . . . . A'JG5 . . . . . . SEP1 . . . . . . SEP2 . . . . . . SEP3 . . . . . . M M
- f 1
TABLE 7-52. DEHSITY lt40./1000 CteIC NETERS) OF P0H0X15 HIGROMACULATUS LARVAE COLLECTED BY CALAiOAR WEEK AfD YEAR AT RESERVOIR STATION, NORTH AletA Pol 4ER STATI0tl. VIRGINIA. COVE 00LIQUE 14EEK OF SANPLE 1979 1980 1981 1979 1980 1981 NAR1 . . . . . . MAR 2 . . . . . itAR 3 . . . . . . NG4 . . . . . . HARS . . . . . . APRI . . . . . . AFR2 . . . . . . AlW 3 . . . . . . AFR4 . M 924 . . . AFR5 57 . . . . . MAY1 198 1498 . . 462 6 NAY2 $30 406 28 19 65 6 NAf3 29 374 38 . . . NAY4 . 42 89 273 29 71 d w JUtti . . . Jthl2 Jt243 f JtAM 14 . . . . . Jtal5 . . . . . . JUL1 . . . . . . JUL2 . . . . . . JUL3 . . . . . . JUL4 . . . . . . JUL5 . . . . . . AUG1 . . . . . . AUC2 . . . . . . AtJG3 . . . . . AUG4 . . . . . . AUGS . . . . SEP1 . . . . Sumum. M e-
- . = . _ . _ _ . . _ _ . . . _. _. __. _ . . _ . . . . . -__ _ . __ _ _ _ . _ . - ..- . _. . . . _ ?
4 TA8LE 7-53 ' DEVELOPMENTAL LENGTH CLASSES USED DURING THE 1981 LAKE ANNA ICHTHYOPLANKTON SURWEY Developmental Class (ass) Yolk Sac Post Larwal Species Early Mid late Lepools sPP. 2.0-4.4 4.5-6.9 7.0-9.4 9.5-13 9 e W Dorosoma cepedianum 3.0-6.9 W 7.0-9.9 10.0-15.9 16.0-29.9 m e Morone americana 1.5-3.9 4. 0- 7. 9 8.0-11.9 12.0-19.9 Perca flavescens 5.0-6.9 7.0-9.9 10.0-13.9 14.0-19.9 Pomonis nigromaculatus 2.0-4.4 4.5-79 8.0-11.9 12.0-15.9 l t i a e ' ) s I n Yr 7 T i
1 i
-340-i I
TABLE 7-54 PERCENTAGE OF THC TOTAL LARVAL CATCH GIVE* BY DEVELOPMENTAL CLASS FOR EACH SPECIES COLLECTED IN LAKE ANNA DURING 1981 The Percent Survival from Early Through Late Post Larval Developmental Stages 1 is Given in Parenthesis Developmental Classes Yolk Sac Post Larval i Species Early Mid Late Lepomis spp. 24 - 51 (100) 21-(41) 4 (8)
; Dorosuma cecedlanum 44 29 (100) 23 (79) 4 (14)
Morone maericana 32 47 (100) 17 (36) 4 (9) y Perca flavescens 41 44 (100) 14 (32) 1 (2) Pomonts nigromaculatus -69 (100) 1 ( 1) 0 (0) 30 j I i 1 4 ] i i i l i 1 O J 1 i
-341 -
TRDLE 7-55.' REPLICATE DAY / NIGHT LARVAL TOUS TA!EN AT Ti!E HIDDLE RESERVOIR STATION, LAKE ANNA, VIRGINIA. VALUES ARE FIS!! PER T!! O U S A N D CU3IC METERS OBLISUE TOW DATE SPECIES DAY NIGHT 1 2 1 2 810604 DOROSOMA CEPEDIANUM 581 269 1302' 706 LEPOMIS SP. 0 49 132 94 MORONE AMERICANA 37 24 38 0 TOTAL 618 342 1472 800 810611 DOROSOMA CEPEDIANUM 1127 952 608 900 LEPOMIS 1P. 161 99 505 295 MORONE AMERICANA 40 40 0 0 TOTAL 1328 1091 1193 1195 810618 DOROSOMA CEPEDIANUM 176 181 573 611 LEPOMIS SP. 22 23 263 356 TOTAL 198 203 C35 967 810625 DOROSOMA CEPEDIANUM 181 315 169 323 LEPOMIS SP. 0 126 720 768 TOTAL 181 441 090 1091 810702 DOROSOMA CEPEDIANUM 57 19 255 101 LEPOMIS SP. 113 74 127 C0 TOTAL 170 93 382 181 810716 DOROSOMA CEPEDIANUM 0 0 0 19 LEPOMIS SP. 140 309 258 33 TOTAL 140 309 258 57 810723 LEPOMIS SP. 52 82 163 142 TOTAL 52 C2 153 142 820730 LEPOMIS SP. 10 10 0 54 TOTAL 10 10 0 54
-342-TABLE 7-55. REPLICATO D AY/HIGIIT L ARV AL TONS TANCH AT TI!E MIDDL" RESERVOIR STATION, LAKE AHNA, VIRGINIA. VALUES ARE FISit P C .'.
T!!O US A::D CUBIC 11ETERS COVE TOM DATE SPECIES DAY HIGIIT 1 2 1 2 310604 DOROSOMA CEPEDIAMUM 1609 1243 6856 3545 LEPOMIS SP. 29138 25135 26289 2:429 TOTAL 30747 26373 33144 24974 810611 DOROSOMA CEPEDIAMUM 39 40 535 7778 LEPOMIS SP. 934 1012 8449 0 TOTAL 973 1053 8984 7778 810618 DOROSOMA CEPEDIAMUM 0 0 643 180 LEPOMIS SP. 708 411 9474 6766 TOTAL 708 411 10117 6946 810625 DOROSOMA CEPEDIAMUM 0 52 0 0 LEPOMIS SP. 1615 1813 8419 12772 TOTAL 1615 1865 8419 12772 810702 DOROSOMA CEPEDIANUM 0 0 0 45 LEPOMIS SP. 8108 2841 9762 5204 TOTAL 8108 2841 9762 5249 4
N
~~
l y l Upper Reservoir i
- u
{ Middle Reservoir , Y-T
)
e Lower Lagoon 1 Reservoir Elk Creek e I
\=-
e
- FIGURE 7-1. APPROXIMATE LOCATIONS OF Millp nd [ Lagoon 3 Creek ICHTHY 0 PLANKTON SAMPLING STATIONS IN LAKE ANNA, VIRGINIA, 1979-1981. 3 Lagoon 2
-344-1 4
4 Ichthyoplankton Culture y-.. . _.
. _ ,y __ -- . ,
-345-I CHTHYOPLANV,T04- CULTURE The current state of ichthyoplankton taxonomy makes identification past the genus level difficult in many cases. The families that are collected from Lake Anna and the North Anna River which present this difficulty are the Centrachidae, Cyprinidae and Catastomidae.
The flow-through system at the North Anna Environmental ' Laboratory has been used over the past year to develop technical skills needed for ichthyoplankton culture. A procedure has been established utilizing both closed and flow-through tanks that has yielc'ed good results for eggs and yolk sac larvae collected from " wild" populations. The redbreast sunfish, Lepomis auri tus , was raised from yolk sac larvae to the juvenile stage and a reference series was collected of all stages and used to obtain a positive identification of downstrea.n larvae of this species. The objective of the 1982 program is to develop a reference series of problem species. A major problem at this stage is that collections made from nests in the " wild" may contain more than one species of larvae because some members of the Centrachidae family have been shown to use the same nesting sites (Breder and Rosen, 1966). To assure the validity of the reference series the establishment of an in-lab breeding stock is being attempted. Another solution being considered is to collect ripe adults, strip the milt and roe and attempt artificial fertilization. In 1982 the system's potential will be developed further by the culture i of macroinvertebrates to provide taxonomic information that is currently lacking. The system may also be able to provide data on fish egg hatching success which will help in interpreting entrainment data and essessing its impact, if any. l
-346-SYSTEM DESIGil AND OPERATlflG DATA A small and fully controllable flow-through system, involving small laboratory aquaria was developed to meet the requirements of special culturing .
studies at the Envi ronmental Laboratory. The system utilizes Reservoir water in a flow through mode so that physical and nutritional parameters (temperature, food source, etc.) would approximate ambient Reservoir condi tions. The-following discussion includes details of design, operation, and maintenance of this system. The Environmental Laboratory is on an island which separates Lake Anna Reservoir f rom Lagoon 1 of the Waste Heat Treatment Facility (Figure 8-1). The system draws from a small Reservoir cove located behind the laboratory (Figure 8-2). A 1/2 horsepower centrifugal pump (Sequence 1100 by Multi-Duti Mfg. Corp) is located on shore with a 4.81 cm (1.5 in.) PVC line running out 15.25 m (50 f t.) into the cove with a screened foot valve 1.5 m under the water surface. Cove water is pumped through a 4.81 cm (1 1/2 in.) diameter PVC line, 111.32 m (365 ft.) long, to a 378.5 1 (100 gallon) service water storage tank located in the laboratory. This tank serves primarily as a temperature mixing / settling tank (Figure 8-3). Water temperature is affected by natural mixing between the ambient Reservoir temperature and ambient laborato ry temperature. This influence has not been substantial enough to prohibit the immediate introduction of specimens. Discharge water from the service tank is controlled by a system of 4.81 cm (1.5 in.) PVC ball valves (Figure 8-4) and is gravity fed through 4.81 cm (1.5 in.) PVC pipe at a rate of approximately 204.12 1 (54 gallons) per hour to eight 68 1 (18 gallon) , flow through, all-glass tanks (Figure 8-3). All eight tanks discharge water from the surface through a 1.90 cm (0.75 in.) overflow pipe to a 5.08 cm (2 in.) PVC drain line. Each tank can be isolated
-347-from the ci rculation system. In this situation each tank is furnished with a small filter / aerator apparatus.
The surface water discharge _ technique is used to allow plankton to settle out and thus allow ichthyoplankton-larvae a longer feeding period. Also, observation has shown that larvae tend to avoid the surface discharge where-as a bottom discharge tends to cause a higher rate of impingement and death. Wi ti: few exceptions larval. fish'are supplied with natural foods (rotifers, cladocera, and copepods) which are drawn in with the intake water. In the fall and winter months either commercial food (such as freeze dried krill flakes - Tetra) or fresh fish (finely chopped or whole) are introduced as food. During the winter larvae and/or Juveniles are transferred to an adjacent system of small aquaria operating on individual closed water circulation systems and further studies are conducted using the individual aquaria.
-348-SYSTEM MAINTENANCE Daily -
- 1. Check log for any studies being initiated or completed and specimens to be added or removed.
- 2. Remove and record dead specimens 3 Check level of water in storage tank
- 4. Check rate of discharge from storage tank 5 Check temperature of discharge water from storage tank as shown by recorder.
- 6. Check level and flow of water in each tank.
7 Inspect intake and discharge on each tank.
- 8. Observe state of health and interaction of all specimens.
Weekly - (Proposed for ,1982)
- 1. Change temperature charts on recorders at intake cove and storage tank discharge.
- 2. Calibrate temperature recorders as required.
3 Measure pH in cove and tanks.
- 4. Measure 0.0. In cove and tanks. -
5 Flush storage tank discharge line.
- 6. Flush debris build-up on ball valves to each tank.
7 Clean glass on all tanks.
- 8. Siphon off excreta and other debris from all tanks.
Monthly -
- 1. Flush cove pump and pipe to storage tank
- 2. Clean foot valve strainer 3 Check cove pump
- 4. Drain and clean storage tank Seasonally -
- 1. Inventory and inspect all equipment
- 2. Dewinterize system 3 Condition entire system before introduction or commencement of any larvae studies
- 4. Gradually shut system dow'n in October 5 Inspect entire system and all equipment
- 6. Winterize system l
-349-Literature Cited Breder , C. M. ,J r. and E. D. Rosen. 1966. Modes of reproduction in fishes.
T. F. H. Publi ca tions . Jersey Ci ty , 'lew Jersey , 'JSA.
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, -352- l F IGURE S-3 i ICHTHYOPLAtlKTCN-CULTURE SYSTEM
. i DETAILED Ifi FIGURE 8-4 INTAKE WATER LitaE -*= g- - - - - - - - - - - ;
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i FIGUPE 6-li -353-CIAGRAM OF FIGURE 8-3 PIPING AND VALVES FOR SERVICE WATER Dl1 CHARGE < ENERGENCY OVERFLOW TO TA:4KS AND WASTE DISCHARGE TO DRAIN CONSTANT-LEVEL SIPH0il h DISCHARGE TO TANKS
/
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)
-354-Impingement
-355-INTRODUCTION North Anna Power Station condenser cooling water is withdrawn from Lake Anna by a series of circulating water pumps (4 C.W.P./ unit),
each rated at 15 m3 /sec. The cooling water is filtered by a single rotating traveling screen (9.5 mm mesh) in front of each C.W.P. to prevent clogging of pumps and condenser tubes by fish and miscellaneous debris. During C.W.P. operation, fishes too large to pass through the intake screens are trapped (impinged) against the screens and subsequently removed by a spray wash system. In accordance with NPDES Permit No. VA00 52451 under Special Conditions: Environmental Studies, 24-hour impingement samples were collected to determine the effect, if any, of Impingement on the fish communities of Lake Anna. METHODS AND MATERIALS The sampling schedule for the first three weeks of a four-week cycle consisted of two samples per week collected on non-consecutive days. During the fourth week, a composite sample was taken consisting of twelve continuous 2-hour samples. Each screen was washed for a minimum of 10 minutes to insure all fish were removed. All operable screens were washed when the corresponding circulating water pump was in operation. The fish were washed into a catch basket at the end of a sluiceway and were removed and transported to the laboratory. Up to 50 individuals of each species were measured (total length, T.L. , in mm) and weighed (nearest 0.1 g ) . Those fish numbering over 50 were enumerated and weighed in bulk. Water temperature, dissolved oxygen, weather conditions and number of operating screens and pumps were recorded during each sample.
-356-RESULTS The results of Impingement sampling indicated that a total of 31,768 fishes representing 23 species was collected from the traveling screens during 1981 (Table 9-1). The percentage of total catch was dominated by gizzard shad (Dorosoma cepedianum) at 52%, black crapple (Pomoxis nigromaculatus) at 24%,and bluegill (Lepomis macrochirus) at 12%. The remaining 20 species accounted for only 12% of the total catch.
The comparison of the total number and weight (g) of fish collected for each sample date showed definite seasonal patterns (Table 9-2). Gizzard shad (DCT in table), black crappie (PNT in table) and bluegill (LMAT in table) are treated individually; all other species are designated OTT in the table. Seasonal trends are apparent with peak impingement for most species occurring in late winter through spring. Diel Impingement patterns were present for the composite samples taken every two hours (Table 9-3). Greatest lmpingement occurred during nocturnal sampling periods. The lowest Impingement occurred generally between 0800 and 1400 hours. The majority of all fish collected (76.0%) were less than 200 mm T.L. (Table 9-4). However, the majority of the gizzard shad (69.7%) were greater than 200 mm T.L. The estimated total numbers of fish impinged by season (Winter: January - March; Spring: April - June; Summer: July - September; Fall: October - December)were estimated by treating the total 24-hour counts and i the 12-two hour counts as being from two different strata with different ( weights. The formulae for stratified random sampling with a finite population correction factor applied was taken from Cochran (1963). Seasonal estimates were computed by expanding the means by the number of days in the respective seasons. The estimated total number of fish impinged during 1981 was 129,597
-357-Seasonal estimates were highest in the winter (60,070), with the summer showing the lowest Impingement (7,896).
The relationship between water temperature ( C) and fish impinged /
. screen was compared by sample date (Figure 9-1) . Temperatures ranged f rom 2.4 C in January to 29.6 C in August. A general inverse relationship existed between numbers of fish impinged and temperature. Impingement numbers increased as the water temperature increased following the winter low of 4.3 C. The number of fish impinged declined sharply after the temperature reached 14 C.
Over the last three years gizzard shad, yellow perch, and black crappie generally showed peak inpingement rates in late winter and early spring (Figure 9-2). The lowest impingement rates for these fishes occurred during the summer. Total annual numbers per screen were highest in 1979 for all three species. DISCUSSION Gizzard shad, which showed a sharp decrease in the number impinged in 1980, increased and dominated the annual catch (52%) during 1981. The numbers of gizzard shad impinged were considerably higher in winter and early spring, it is well documented that gizzard shad are susceptable to impingement during the winter season (Edwards et al. 1976; Loar et al. 1977). Over the past three years there appears to have been a shift in length frequencies of gizzard shad towards larger size classes. This may be indicative of a decrease in predation on the larger gizzard shad. Yellow perch have shown a rapid decline in numbers impinged during the last three years. The numbers impinged ranged from 86,266 in 1979, to 7,420 in 1981, a reduction of 91%. Ruelle et al . (1977) found, in a study of a South Carolina reservoir (Keowle Reservoir) used for cooling water for a nuclear power station that yellow perch populations may have declined as a result of increased i
-358-water temperatures, which may have reduced the number of ova brought to maturity. However, Jenkins (1970) proposed that the natural aging process of lakes could be an influence on the success (or lack thereof) of certain populations.
The numbers of black crapple impinged during 1981 (31,386) were slightly less than 1980 (37,863). Black crapple, however, have been impinged at a constant rate over the last three years. They were present in 100% of 24-hour samples taken in 1981. The numbers of bluegill impinged Nwe gradually increased during the last three years. Generally, more bluegill were impinged in the fall, possibly due to a successful spawn during the spring and summer months. The length frequency of the bluegill measured showed 86% was less than 100 mm T.L. Length frequency data showed 75.9% of the fish collected were under 200 mm in T.L. In 1980, 82.2% of the fish collected were under 200 mm in T.L. This compares favorably with previous investigations at other locations. (Mather et al. 1977; Nalco, Inc. 1977). The temperature and impingement graph clearly shows the relationship between the number of fish impinged and water temperature. This phenomenon was previously shown in data collected in 1979 and 1980. The estimated total number of fish impinged in 1981 (129,597) was 16.2% higher than in 1980 (111,464). This does not appear to be unusually high in comparison with number of fish reportedly impinged at 33 other power stations located on inland waters (Freeman and Sharma 1977). Based on mean values of 1981 standing crop estimates of kilograms of fish / hectare, derived from cove reconone data, the North Anna Power Station impinged an equivalent of approximately 0.23% of the total standing crop in 1981. In conclusion, < the numbers and species of fish impinged at North Anna are considered to have no impact on fish communities of Lake Anna.
-359-
SUMMARY
- 1) Gizzard shad was the dominant species impinged during 1981.
- 2) Total impingement declined in 1381 from the 1980 projections with yellow perch showing the sharpest decline.
- 3) The majority of the fish impinged were less than 200 mm T.L.
- 4) Impingement studies showed lowest impingement during daytime hours.
- 5) Impingement studies showed that there was an inverse relation between water temperature and numbers of fish impinged.
- 6) Impingement of fish by the opera'tlon of North Anna Power Station has no impact on the fishery of Lake Anna.
4
,w. - - . - . - , . , - - -
F 1
-360-LITERATURE CITED Cochran, W. G.1963 Sampling techniques. 2nd Ed. Wiley and Sons, Inc.
New York, New York, USA.
~
Edwards, T. J., W. H. Hunt, L. E. Miller and V. V. Sevic. 1976. An eva1uation of the impingement of fishes at four Duke Power Company steam generating facilities. pp. 373-380 inL Gerald W. Esch and Robert W. McFarlane, editors. Thermal Ecology ll . Technical Information Center, Energy Research and Development Center, CONF-750425 Springfield,' Virginia, USA. Freeman, R. F., Ill., R. K. Sharma, 1977 Survey of fish impingement at power plants in the United States. Richard B. Keener, editor. Vol. Il inland Waters, Argonne National Laboratory ANL/ES-56, Argonne, Illinois, USA. Jenkins, R. M. 1970. The influence of engineering design and operation and other environmental factors on reservoir fishery resources. Water Resources Bulletin of the Journal of American Water Resources Association 6 (1): 110-119 Loar, J. M. , J. S. Gri f fith and D. K. Kumar. 1977 An analysis of factors influencing the impingement of threadfin shad at power plants in the - southeastern United States. pp. 245-255 in.L. D. Jensen, editor. Fourth National Wo rkshop on Entrainment and impingement. Library of Congress 78-57000. Mather, D. , P. G. Kelsey and N. C. Magnusson. 1977 Impingement of fishes at Peach Bottom Power Station, Pennsylvania. Transactions of the American Fisheries Society. 106 (3): 258-267 Nalco, I nc. , 1977 Length frequency distribution of gizzard shad collected from the Dean H. Mitchell Station. Prepared for the Northern Indiana Public Service Company, USA. Ruelle R., W. Lorenzen and J. Oliver. 1977 Population dynamics of young-of-the year fish in a reservoir receiving heated effluent. pp. 46-67 int W. VanWinkle editor. Proceedings of the Conference on Assessing the Effects of Power-plant Induced. Mortality on Fish Populations. Pergammon Press. New York, New York, USA.
-361-l TA3LE 9-1. T!!E TOTAL CATCH AND PEl. CENT OF FIS :ES COLLECTED FR0!! l TH:: VERTICAL TRAVELING' SCR::E!(S AT NORT!! AM:!A POWER STATION DURIl(G 1931.'
CATCH % OSTEICllT!!YES AllGUILLIDAE - freshwater mels A!(GUILLA ROSTRATA -American eel 3 < 0.5 CLUPEIDAE - herrings ALOSA AESTIVALIS -blueback herring 14 < 0.5 DOROS0!!A CEPEDIANUM -gi::ard shad 16474 51.9
' ESOCIDAE -
pikes ES0X !!IGER -chain pickeiel 1 < 0.5 CYPRIMIDAE - minnous and carps EXOGLOSSUM MAXILLIHGUA -cutlips minnou 1 < 0.5 MOTEMIGONUS CRYSOLEUCAS -golden shiner 24 < 0.5 f(O TRO PIS ANALOSTAMUS -satinfin shiner 3 < 0.5 HOTROPIS CORMUTUS -common shiner 1 < 0.5 PIMEPHALES NOTATUS -bluntnose minnou 2 < 0.5 ICTALURIDAE - bullhead catfishes ICTALURUS HEBULOSUS -broun bullhead 87 < 0.5 ICTALURUS PUNCTATUS -channel catfish 3 < 0.5 PERCICl!TilYIDAE - temperate basses MOROME AMERICANA -white perch 613 1.9 MORONE SAXATILIS -striped bass 1110 3.5 CENTRARCHIDAE - sunfishes ACANTHARCl!US POMOTIS -mud sunfish 3 < 0.5 LEPOMIS AURITUS -redbreast sunfish 5 < 0.5 LEP0t!IS GIBB05US -punpkinseed 12 < 0.5 LEPOMIS GULOSUS -warmouth 12 < 0.5 LEPOMIS MACROCIIIRUS -bluegill 3839 12.1 LEP0t!IS MICROLOPHUS -redear sunfish 1 < 0.5 ; MICROPTERUS SALtt0 IDES -largenouth bass 14 '< 0.5 Pot 10XIS HIGR0!!ACULATUS -black crappie 7733 24.3 l PERCIDAE - Perches ETI!EOS T 0t! A OLttSTEDI -tessellated darter 1 <0.5, PERCA FLAVESCIHS -yellou perch 1812 517 TOTAL 31763 x F e
r- - TABLE 9-2. THE HUrSER hfD WEIGHT IGttS.) DF ItCIVIDUAL5 FOR SELECTED FI5it $PECIE3 A3D TOTALS FOR CIHEP SPECIES IttPIPCE3 AT HORTH AINA PCHE3 ETATION Cf SArtPLE DATE DUR1tG 1581. V* LUES CEPRESENT T:;TALS OVE2 A 24-HOUR PCIDO. A2fMEV!ATIONS Ak2: DC - DOROS0ttA CEPE2IAIA21. PH - PortGX15
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HIGR0ttACULATUS, Lt:A - LEPort15 t'AC20CHlaUS. CT - CTHE3. THE SUFFIXLS ARE ' T - t42BER AfD W - MEIGHT. , DATE DCT DCW PHT Pted LitAT UtAW OTT OTW TFISH TNT 810106 96 . 5683.6 13 814.1 6 150.5 16 195.3 131 LS43.7 810108 713 43263.1 12 796.7 6 285.9 25 1885.9 756 46231.6 810114 1358 20696.2 25 1463.6 3 158.8 13 157.4 1499 P2476.C , 810116 92 6067.9 4 202.5 2 52.1 4 37.1 102. 6359.6 810120 55 3247.8 8 427.2 4 70.5 6 260.2 73 4005.7
. 810122 119 8370.2 11 656.2 6 160.4 8 376.3 144- 95+ 3.1 810127 140 9251.2 61 3807.1 8 183.9 38 323.6 247 13565.8 81G203 199 13519.6 to 1581.4 6 134.5 39 445.2 272 15683.7 810205 460 30813.0 30 1681.3 5 52.7 22 354.5- 517 32931.5 810210 515 32495.4 65 3501.7 4 47.6 16 208.4 600 36253.1 810212 541 35253.9 36 2282.8 12 240.5 34 440.2 623 33217.4 810218 456 29231.6 88 4558.3 19 385.1 52 1188.3 615 35363.3 810220 124 7920.2 209 12226.0 11 269.9 194 5192.4 538 25603.5 810224 76 5492.6 2 34 13341.9 35 868.2 491 12574.6 836 32277.3 810303 119 7560.9 348 19302.4 17 367.6 278 6063.4 762 33294.3 810305 122 7515.7 143 8025.0 14 259.0 309 6198.4 58S 21998.1 810310 173 11635.5 128 0908.0 10 198.1 109 2410.7 420 21152.3 810312 483 29976.6 164 8664.2 8 190.4 159 3351.3 814 421E2.5 810317 526 39204.9 513 27665.2 20 358.1 79 1750.8 1200 68990.6 J, 810319 1662 105209.5 359 19054.0 2 70.4 50 1022.9 2073 125356.8 cs 810324 693 45320.2 161 7628.6 10 208.6 62 1260.7 926 54438.1 810331 500 28999.2 425
$f 23766.$ 6 149.0 117 1693.5 104S 54607.9 810402 623 33953.2 338 17893.1 15 213.0 117 1785.8 1093 53S45.1 810407 1642 85724.4 232 8760.8 23 151.8 70 1121.7 1967 95758.7 810409 119S 56745.4 103 4452.9 8 54.4 42 458.0 1351 61710.7 810414 1493 70105.4 69 2733.8 73 309.7 52 1084.2 1688 74240.I' 810416 496 26592.7 59 2141.1 77 300.7 27 761.4 659 29795.9 810421 128 6527.1 27 635.1 103 430.9 28 1544.2 2c6 9137.3 810428 54 2641.1 41 1794.1 45 160.7 23 4439.6 163 9035.5 810430 27 1532.3 32 1717.4 84 353.5 12 468.5 155 4072.2 810505 14 696.9 20 474.7 21 78.8 11 971.2 66 2421.6 810507 11 468.0 21 1148.1 42 256.4 17 862.9 91 2735.4 810512 2 155.0 24 1797.4 46 309.4 8 2118.3 80 4383.1 810514 0 0.0 22 1511.4 38 212.5 4 237.5 64 1961.4 810519 5 336.9 49 2953.2 74 554.5 le 621.0 133 4467.6 810526 2 93.0 54 3585.2 40 885.1 6 251.1 102 4314.4 810529 2 75.6 70 4816.3 25 446.5 7 514.9 104 5853.3 810602 3 103.2 25 1659.3 51 1130.7 5 388.2 84 3281.4 810604 2 114.7 14 1046.5 58 554.7 5 199.5 79 1945.4 810609 0 0.0 7 537.7 156 1122.9 2 141.7 165 1802.3 810611 1 29.4 13 1087.5 160 991.4 3 165.9 177 2274.2 810616 1 43.3 41 3746.0 to 1090.2 10 2505.3 132 7324.8 810623 3 156.2 6 540.0 16 423.7 8 425.5 33 1545.4 810625 1 50.4 10 720.7 10 215.0 7 314.4 28 1300.5 810630 1 59.4 12 943.1 7 253.2 8 521.6 28 1777.3 810702 1 37.1 20 1440.4 13 316.6 16 1086.4 50 2E80.5
~2 810707 4 39.9 37 2677.0 25 371.8 19 1054.8 85 4173.5 810709 3 39.3 33 2085.1 le 163.7 7 531.7 53 2819.8 810714 2 171.5 59 3648.9 30 244.4 11 711.6 102 4776.4 810721 1 61.7 27 1673.7 10 58.3 9 375.8 47 2169.5 11 .
1 TABLE 9-2. THE takDER Ate WEIGHT IGitS.3 0F IteIVIDUALS FOR SELEC3ED FISH SPECIES Ate TOTALS FOR OTHER SPECIES Il1 PINGED AT NORTH AtelA POWER STATION ST SAttPLE DATE DURIllG 1981. VALUES REPRESENT TOTALS OVER A 24-HOUR PERIGO. ABEREVIATI0ftS ARE DC - DOiiOSOttA CEPEDIAtAkt. PH - P0ft0XIS HIGRONACULATUS. LitA - LEPortIS ttACROCHIRUS. OT - OTHER. THE SUFFIXES ARE T - HLASER AfD W - WEIGHT. DATE DCT DCW PNT Pfa4 LitAT LitAM OTT OTW TFISH TNT
. 810723 0 0.0 19 1130.9 7 100.9 7 524.6 33 1756.4 810728 1 56.8 31 2022.0 19 109.4 9 569.4 60 2757.6 810730 3 137.0 to 1865.7 20 199.6 11 512.4 62 2714.7 810804 5 156.1 32 1905.1 7 117.3 6 221.1 50 2399.6
- 810806 5 267.6 23 1443.4 21 130.1 15 911.3 64 2752.4 1
810811 8 440.7 15 1048.3 194 331.1 10 561.0 227 2381.1 810818 7 284.2 27 1800.2 85 161.6 le 514.1 129 2760.1 810820 to 702.2 58 3623.3 94 399.5 17 739.4 189 5464.4 810825 7 174.1 70 3779.7 to 90.8 9 474.4 106 4519.0 . 810827 4 159.5 45 2534.2 3 4.7 8 447.3 60 3145.7 810901 7 416.4 49 2783.2 1 17.8 6 312.4 63 3529.8 810903 4 142.3 43 2335.8 5 24.3 7 305.0 59 2807.4 810910 9 413.6 63 3151.5 16 264.7 8 439.9 96 4269.7 810916 12 504.1 19 1228.7 15 82.9 4 227.6
- 50 2043.3 810918 9 386.2 11 516.1 28 195.3 4 276.9 52 1374.5 810922 14 530.5 132 6449.4 14 43.7 9 212.0 169 7235.6 810924 16 623.7 44 2171.0 6 109.4 9 425.3 75 3329.4 -
810929 14 519.5 65 3154.8 9 22.7 4 152.5 92 3849.5 811001 9 334.5 96 4448.6 5 16.3 9 274.9 119 5074.3 tb 811006 13 585.4 127 5577.6 13 105.0 9 486.7 162 6754.7 ON 811014 8 279.7 137 5896.8 5 24.6 4 261.6 154 6462.7 '7 811016 14 738.7 178 7002.4 12 82.2 3 84.0 207 7907.3 811020 22 890.3 339 16950.4 13 51.0 3 10.8 377 17902.5 811022 11 445.9 113 7692.5 16 88.3 8 422.6 148 8649.3 811027 22 843.4 367 17472.9 59 171.4 11 429.6 459 18917.3 811029 26 843.3 288 15540.7 77 301.5 16 732.0 407 17417.5 811103 34 1360.9 79 3600.2 180 535.8 22 645.6 315 6142.5 811109 31 1102.6 205 9395.9 518 1503.8 40 682.2 794 12689.5 . 811113 59 2361.8 40 1558.6 339 1573.0 66 1347.7 504 6871.1 811117 54 2333.3 49 2224.5 106 391.7 80 1532.6 289 6482.1 811119 39 1510.2 74 3445.6 80 276.1 56 942.1 249 6174.0 811123 48 1945.8 59 2386.5 65 212.3 91 1626.2 263 6170.8 811125 59 2427.8 51 2120.8 88 246.5 85 1769.3 283 6564.4 811201 70 2701.4 13 666.4 23 68.3 52 897.0 ISS 4333.1 81120S 113 4463.7 13 547.5 10 62.8 41 862.4 177 5936.4 95 3309.1 30 1322.5 50 281.3 57 1382.1 232 6295.0 811210 103 439S.9 32 1433.1 29 164.7 77 1959.6 241 7956.3 811216 9169.0 811218 158 5767.4 43 1967.8 13 99.1 57 1354.7 271 78 2963.2 22 1014.0 6 50.5 25 769.4 131 4797.1 811221 9630.6 811223 146 6661.7 28 1303.9 3 40.3 48 1624.7 225 115 5094.8 46 2214.7 11 211.2 41 1328.9 213 8849.6 811229 1466001.5 TOTAL 16474 932565.9 7733 405532.1 3839 25514.8 3692 102203 31768
~~
TABLE C-3. THE 682sEJ AfD WEIGHT (Gits.) 0F ItOIVIDUALS OF SELECTO FISH SPECIES Ate T!TALS FOR CTHQ SPECIES IMPItCE'J AT HORTH AlttA POWER STATION FOR EACH TWO-HOUR SAttPLE DURitG 1981. AEEREVIATI0tt3 ARE3 DC - DOROSOttA CEPEDIA!AJtt. Ptt - pot 10X15 HIGRottACULATUS. Li1A - LEPot1IS ttACROCHIRUS. OT - OTHER. THE SUFFIXES APE T - tat 1BER Ate W - WEIGHT. DATE TIME DCT DCW PHT PHW LMAT LMAW OTT OTW TFISH TWT 810127 200 14 856.0 2 128.4 11.7 400
. . I 17 996.1 10 738.0 2 145.4 . . I 14.0 13 897.4 600 21 1442.9 13.2
. . 1 . . 22 1456.1 800 13 771.7 2 147.6 60.8 1 . . 16 980.1 1000 8 595.3 2 134.1 . . . . 10 729.4 1200 4 276.3 1400
. . . . . . 4 276.3 8 543.6 2 130.2 . . . . le 673.8 1600 12 785.1 18 1117.8 . . . . 30 1902.9 1800 7 445.2 8 513.9 . . 22 168.1 37 1130.2 2000 9 523.0 14 847.6 1 11.1 2 25.3 26 1407.0 2200 17 1103.9 6 352.6 2 56.5 10 92.9 35 1605.9 2400 17 1167.2 5 289.5 3 42.3 2 11.6 27 1510.6 810224 200 3 199.1 21 1143.1 3 45.5 90 2283.7 117 3671.4 400 8 625.5 35 1931.1 4 76.8 84 2138.8 131 4772.2 600 7 603.1 17 852.0 3 80.2 50 1474.2 77 3009.5 800 8 612.2 12 550.5 3 90.9 10 327.3 33 1580.9 1000 6 457.5 2 92.8 1 1.4 2 24.7 11 576.4 8 1200 3 196.9 2 131.5 3 70.5
- 8 393.9 Y$
1400 5 341.9 7 427.4 . . 1 27.7 13 797.0 3' 1600 6 478.4 5 268.0 . . 3 132.0 14 878.4
- 1800 2 127.7 18 1016.5 2 56.2 23 564.6 45 1765.0 2000 9 607.1 56 3412.5 8 217.4 76 1902.1 149 6139.1 2200 13 832.9 32 1946.6 6 128.0 41 981.2 92 3883.7 2400 6 410.3 27 1569.9 5 171.8 108 2647.8 146 4799.8 810324 200 69 4708.1 24 1998.0 1 35.2 5 82.9 99 5924.2 400 64 4037.9 14 668.9 . . 3 87.3 81 4794.1 600 70 4701.8 22 1011.8 . . . . 92 5713.6 800 59 3975.9 10 562.1 1 20.9 7 152.5 77 4711.4 1000 46 2934.1 6 256.2 1 19.3 2 56.5 55 3266.1 1200 57 3706.1 1 67.5 . . . . SS 3773.6 1400 30 1999.2 . . . . I 19.9 31 2019.1 1600 35 2142.6 1 7.1 1 3.8 1 25.8 38 2179.3 1800 45 3125.4 1 52.9 1 28.3 2 31.2 49 3237.8 2000 75 4938.0 27 1221.6 1 44.6 28 623.4 131 6877.6
~~
2200 84 5045.0 35 1767.2 3 42.6 11 154.0 133 7003.8 2400 59 3956.1 20 915.3 1 13.9 2 47.2 82 4932.5 W , 11 .
s-l i TA8tE 9-3. THE HLRf,ER AfD WEIGHT IGMS.) 0F ItCIVIDUALS OF SELECTED FISH SPECIES Ate TOTALS FOR OTHER SPECIES It1PIPEED AT ICRTH AtelA F0WER STATI0H FOR E ACH TWO-HOUR sat 1PLE DUR1tG 1981. AECREVIATIDHS ARE: DC - DDROSONA CEPEDIAI4RI. PH - Pot 10XIS HIGR0 MACULATUS. LMA - LEP0tlIS MACROCHIRUS. OT - OTHER. THE SUFFIXES ARE T - IAA1BER AfD W - WEIGHT. DATE TIME DCT DCW. PHT PHW LMAT LMAN OTT OTW TF15H TNT 810421 200 9 454.2 5 139.9 11 53.4 3 29.1 to 676.6 400 4 203.0 2 12.0 4 88.3 2 38.7 12 342.0 600 7 393.9 . . 7 33.6 3 99.8 *18 1528.3 800 12 649.9 2 15.1 13 34.5 2 36.8 29 736.3 1000 6 290.3 1 23.8 2 7.9 1 7.3 10 329.3 1200 10 494.2 . . 4 13.1 . . 14 507.3 1400 $1 674.1 . . 3 36.4 2 19.2 18 729.7 1600 16 852.6 . . . . . . 16 852.6 1800 12 637.6 . . 1 4.2 1 14.9 14 656.7 2000 12 651.7 3 188.5 to 51.7 5 128.9 40 1020.8 2200 11 509.8 7 140.3 18 65.7 3 26.1 39 741.9 2400 16 715.8 7 115.5 to 42.1 5 142.4 48 1015.8 810519 200 2 126.2 12 591.7 16 86.3 2 64.7 32 868.9 400 . . 3 179.4 12 75.7 1 8.7 16 263.8
- 600 1 47.5 4 199.3 8 48.6 1 70.4 14 365.8 800 1 46.8 3 298.7 4 12.6 1 138.2 9 496.3 1000 . . 3 112.4 2 12.4 1 46.0 6 170.8 a 1200 . . 2 167.4 2 103.2 . . 4 270.6 $(*
1400 . . I 68.0 . . . . 1 68.0 sn 1600 . . 3 217.6 2 80.1 . . 5 297.7 ' 1800 . . 3 254.0 2 40.1 2 188.3 7 482.4 2000 . . 3 207.9 2 16.0 . . 5 223.9 2200 . . 8 550.0 15 53.7 1 41.9 24 645.6 2400 1 118.4 4 106.8 9 25.8 1 62.8 15 313.8 810616 200 . . . . 23 263.4 2 72.2 25 335.6 400 . . 5 595.0 16 99.2 .
. 21 694.2 600 . . 3 211.8 12 149.6 1 2.7 16 364.1 800 . . 5 447.6 3 10.7 . . 9 459.0 1000 . . 5 429.7 . . . . 5 429.7 1200 . . 6 495.6 2 107.1 1 30.8 9 633.5 1400 1 43.3 5 516.6 3 177.0 . . 9 736.9 1600 . . 3 293.5 2 58.4 . . 5 351.9 1 68.0 . 2 2236.0 1800 . . . . .
2000 . . 2 181.0 2 31.4 1 63.8 5 276.2 2200 . . 3 235.1 10 52.5 1 59.1 14 346.7
~~
3 272.1 7 140.9 2 108.0 12 521.0 2400 . . M
TABLE 9-3. THE HUtBE2 AM3 WEIGHT IGits.) OF INDIVIDUALS OF SELECTE:3 FISH SPECIES AtB T!TALS FOR CTHE2 SPECIES IttPINGE3 AT NORTH AtalA POWER STATION FOR EACH THO-HOUR SAMPLE DURING 1981. ABEREVIATIDHS ARE: DC - DOROSCt1A CEPEDIANUtt. PH - pct 10X15 HIGRottACULATUS. LitA - LEPOttIS ttACROCHIRUS. OT - OTHER. THE SUFFIXES ARE T - laut1BER Atc W - WEIGHT. DATE TIME DCT DCW PHT PNW ' LMAT LMAW OTT OTW TFISH TNT 814714 200 1 38.0 10 609.4 6 82.8 2 119.9 - 19 850.1 400 1 133.5 6 343.7 9 40.8 1 37.0 17 555.0 600 . . 4 236.9 8 33.8 . . 12 270.7 800 . . 2 129.6 1 3.4 1 37.8 4 170.8 1000 . . 2 208.3 . . 2 134.4 4 342.7 1200 . . . . . . 2 143.4 2 143.4 1400 . . 1 83.5 . . . . 1 83.5 1600 . . 2 147.9 . . . . 2 147.9 ) 1800 . . 2 172.7 1 10.1 1 116.4 4 299.2 2000 . . 1 55.1 . . . . 1 55.1 2200 . . 12 671.7 3 37.8 1 70.0 16 779.5
; 2400 . . 17 990.1 2 35.7 1 52.7 20 1078.5 810811 200 2 86.3 2 107.2 30 124.1 1 42.2 35 359.8 400 1 40.9 1 37.2 27 30.2 . . 29 108.3 600 . . . . 45 61.3 . . 45 61.3 800 1 49.9 2 200.3 17 18.6 . . 20 268.8
' 1000 . . 2 129.9 6 5.0 2 74.8 10 209.7 e 1200 . 1 88.4 1 23.4 IN 1400 . . 2 198.9 2 2.4 1 94.2 5 295.5 cm 1600 . . 1 44.3 3 3.9 . . 4 48.2 '
1800 . . . . 2 1.5 1 14.7 3 16.2 2000 . . . . 4 26.4 . . 4 26.4 2200 1 39.7 2 123.8 34 35.1 . . 37 193.6 2400 3 223.9 3 206.7 24 22.6 4 246.7 34 699.9 810910 200 2 86.7 19 941.9 . . 2 140.1 23 1168.7 400 . . 4 28.5 4 227.3 . . 8 255.8 600 1 64.5 2 105.7 2 2.3 1 9.9 6 182.4 800 . . 6 331.7 5 27.3 . . 11 359.0 1000 2 87.2 1 41.1 1 0.6 1 86.7 5 215.6 1200 . . 1 44.4 . . . . 1 44.4 1400 . . . . . . . . 0 . 1600 . . . . . . . . , 0 . 1800 . . . . . . . . 0 . 2000 2 89.0 7 388.4 2 4.3 3 157.2 14 638.9
'5g 2200 749.0 836.6 -
4 2400 2 86.2 13 10 520.8 1 1 1.4 1.5 1 46.0 16 12 568.3 M
=
i 11
taste 9-3. THE HUFBER Ate WEIGHT EGits.3 0F ltCIVIDUALS OF SELECTED FISH SPECIES Ate TOTALS FOR OTHER SPECIES IMPINGED AT 10RTH AtalA POWER STATION FOR EACH TWO-HOUR sat 1PLE DURING 1981. AEEREVIATIONS ARES DC - 00ROSCt1A CEPEDIAlp1. Pt4 - Potox15 HIGR0t1ACULATUS. Li1A - LEP0f115 t1ACROCHIRUS. OT - OTHER. THE SUFFIXES ARE T - tu mER Att M - WEIGHT. DATE TIME DCT DCW PHT Pt44 Lt1AT Lt1AW OTT OTW TFISH TNT 811006 200 4 168.4 9 417.1 . . . . 13 585.5 400 2 81.9 20 779.0 2 6.1 2 130.5 27 1053.0 600 1 29.6 12 420.8 1 1.7 . . 14 452.1 800 1 44.8 14 738.1 1 2.2 . . 16 785.1 1000 . . 8 435.3 1 56.9 . . 9 492.2 1200 . . 5 291.3 . . . . 5 291.3 1400 . . 5 276.2 . . 1 4.7 6 280.9 , 1600 . . 2 103.9 . . . . 2 103.9 1800 . . . . . . . . 0 . 2000 3 205.4 15 676.6 2 15.0 1 63.8 21 960.8 2200 2 55.3 18 708.1 4 13.6 2 106.4 26 883.4 2400 . . 19 731.2 2 9.5 1 71.8 23 866.5 811103 200 8 321.0 5 225.6 22 48.0 1 41.1 36 635.7 400 3 176.0' 6 290.6 8 24.9 3 124.0 20 615.5 600 1 59.2 4 191.7 14 50.0 2 63.2 21 364.1 800 2 95.7 6 273.7 16 55.9 1 3.0 25 428.3 1000 1 41.5 2 126.9 5 .12.5 2 71.3 10 252.2 a 1200 . . 2 98.3 1 2.6 . . 3 1 100.9 31.6
-4 1400 1 31.6 . . . . . .
1600 . . 2 78.8 . . . . 2 78.8 ' i 1800 1 30.4 11 501.2 23 54.4 6 174.3 41 760.3 2000 4 131.9 21 983.0 40 142.7 4 149.4 69 1407.0 2200 6 243.5 9 162.9 25 72.8 2 14.2 42 693.4 2400 7 230.1 11 467.5 26 72.0 1 5.1 45 774.7 811201 200 8 376.0 . . I 1.4 5 107.9 14 485.3 400 2 50.4 3 118.6. 1 1.4 8 58.9 14 229.3 600 13 472.4 . . I 2.8 7 151.6 21 626.8 800 7 275.5 4 170.3 6 12.1 7 151.5 24 609.4 1000 1 43.2 1 95.8 1 5.4 1 20.0 4 164.4 1200 1 43.5 . . . . 1 33.5 2 77.0 1400 3 149.2 . . . . I 100.0 4 249.2 1600 8 320.7 . . 2 3.1 . . 10 323.8 - 1800 7 210.8 . . 4 17.4 4 23.5 15 251.7 2000 6 245.4 3 195.4 2 7.7 11 172.6 22 621.1 2200 6 248.6 1 38.8 1 7.7 2 17.7 10 312.8
~~
2400 8 265.7 1 47.5 4 9.3 5 59.8 18 382.3 u. W (
TA8LE 9-3. THE NureE2 Ate WEIGHT (Gi1S.) 0F IteIVIOUALS OF SELECTED FISH SPECIES Ate TOTALS FOR CTHE2 SPECIES It1PINGE3 AT HORTH Ate 4A POWER STATI0tl FOR EACH THO-HOUR sat 1PLE DURING 1981. AEBREVIAT10ttS ARES DC - DOPOS0t1A CEPEDIA1AJti. PH - Fot10X15 HIGR0t1ACULATUS. Li1A - LEP0t1IS #1ACROCHIRUS. OT - OTHER. THE SUFFIXES ARE T - HUtBER Als W - WEIGHT. DATE tit 1E DCT DCM PNT Pred LilAT Lt1AH OTT OTW TFISH TNT 811229 200 9 397.4 3 131.2 2 34.9 5 176.8 19 740.3 400 17 753.1 2 130.3 . . 3 89.2 22 972.6 600 10 448.2 . . 1 2.4 4 137.4 15 588.0
- 3E 800 10 434.2 10 537.0 2 19.4 3 91.9 25 1082.5 ll 1000 2 40.5 1 31.2 1 1.4 1 8.8 5 81.9 1200 9 409.2 1 50.4 . . 1 7.9 11 467.5 1400 le 449.1 . . . . 1 53.5 11 502.6 1600 4 197.2 1 48.5 . . 2 118.6 7 364.3 1800 7 334.3 6 250.3 1 51.4 3 124.7 17 760.7 2000 15 672.0 15 683.0 . . 6 148.5 36 1503.5 2200 12 484.4 4 207.9 3 96.0 5 98.3 24 686.6 2400 10 475.2 3 144.9 1 5.7 7 273.3 21 899.1
! TOTAL , 1294 77741.6 975 52019.5 777 5096.8 787 20641 3838 158778.0 CD e I 3 6 ummm. M S
. = , - -. . - - - - . _ . .
( l TABLE 9-4. LENGTit-FREQUENCIES OF FISHES INPIllGED AT HORTH Ma4A POWER STATION DUR1tG 1981. LEtETliS (T.L.) ARE Ill 991. THIS TABLE REFLECTS OtiLY THOSE FISH ACTUALLY P1EASURED. i SPLCIES 0 - 49 50 - 99 100 - 149 150 - 199 200 - 249 250+ TOTAL ACANTHARCHUS Por10 TIS 0 0 3 0 0 0 3 AtOSA AESTIVALIS 0 1 1 0 2 10 14 A!CUILLA ROSTRATA 0 0 0 0 0 3 3 00"050ftA CEPE01AllUN 1 57 168 771 2214 82 3293 ES0X 1:1CER 0 0 0 0 1 0 1 . ETHEOS10llA Ott1STEDI O 1 0 0 0 0 1 i EXOGLOSStAl t1AXILLIllGUA 0 1 0 0 0 0 1 ICT ALURUS IIECULOSUS 0 0 3 2 81 1 87 ICTALURUS PUtlCIAIUS 0 2 0 0 0 1 3 LEPot115 AURITUS 1 4 0 0 0 0 5 LErott!S GIEBOSUS 1 7 3 1 0 0 12 LEPOIIIS CULOSUS 0 4 5 3 0 0 12 LEPoll!S ttACROCHIRUS 535 1622 285 73 3 1 2519 LEtulIS t1ICROLOPl!US 0 0 0 1 0 0 1 ftICROPIERUS SAll101 DES 2 3 2 3 0 4 14 t10R0llE AllERICAllA 0 88 118 357 49 1 613 e
#10R0llE SAXATILIS 0 355 700 9 7 1 1072 $
W fl0TEIIIGotlUS CRYSOLEUCAS 0 18 6 0 0 0 24 ' HOTROPIS AtlALOSTAtluS 0 3 0 0 0 0 3
. HOTROPIS C09tlUTUS 0 0 1 0 0 0 1 PERCA FLAVESCEtt3 1 127 705 113 5 1 952
- P111EfHALES HOTATUS 0 2 0 0 0 0 2 50110XIS HIGRottACULATUS 1 233 140 2865 508 1 3728 i
TOTAL 542 2508 2140 4198 2870 106 12364 PERCENT 4.4, 20.3 17.3 34.0 23.2 0.9 , M i - S m ,-
TABLE 9-5. ESTittATE3 TOTAL taktBERS At3 STAteARD DEVIATIONS OF THE ESTIttATES OF FISHES IttPINGED AT NORTH Atlu POWER STATICtt FOR EACH CALEll0ER SEA 50t4 AfD FOR 1981. SPECIES WINTER WINSTD SPRING SPRSTD SutttER StktSTD FALL FALSTD TOTAL >TOTSTD ACAHillARCHUS Pott 0 TIS 4.1 10 8.3 11 . . . . 12 15 ALOSA AESTIVALIS 4.1 4 12.4 8 5 5 32 10 56 14 Att0UILLA POSTRATA 8.2 5 4.1 4 . . . . 12 6 00R030ftA CEFEDIAllUtt 37971.8 9295 23614.5 9132 624 113 5308 1098 67518 13077 c ES0X HIGER 4.1 4 . . . . . . 4 4 E filEOSTCitA OLitSTEDI . . 4.1 4 . . . . 4 4 [FOGLOSSLE1 ftAXILLitGUA . . 4.1 4 . . . . 4 4 ICTALLCUS IIECULOSUS . . 177.9 50 152 36 24 26 354 67 ICTALL1tuS Fut:CTATUS 4.1 4 . . 8 7 . . 12 8 LEPOllIS AURITUS . . 12.4 8 8 5 . . 20 10 LEPortIS GIECOSUS 8.2 5 16.5 7 12 8 12 10 49 16
- LEPOIIS CULOSUS . . 41.4 16 4 4 4 9 49. 18 LEPottis itACROCHIRUS 875.5 282 5178.7 764 2608 1803 6884 2601 15546 3:e8 LEPC!!IS ftICROL0ritOS . . . . . . 4 9 4 9 ftICROPIERUS SAttt010ES 8.2 5 20.7 19 12 6 16 19 57 23 t".030! E At1ERICAt!A 49.1 29 656.6 100 608 55 1132 181 2476 263 t1020ftE SAXATILIS 2008.6 259 202.7 92 24 15 2256 492 4491 563 IDTE!!IG0t!U3 CRYSQLEUCAS 24.5 13 12.4 6 4 10 56 20 97 27 HOTROPIS At1ALOSTAIMS . . 4.1 4 8 5 . . 12 6 e it0TROFIS CO3flUTUS PEPCA FLAVESCENS 6553.6 4620 4.1 785.9 382 4
12 6 68 22 4 7420 4 4636 U O pit!EFilALES 10TATUS 8.2 7 '
. . . . . . 8 7 Pot:0XIS ti!CR0ttACULATUS 12533.6 3031 5331.8 1413 3800 642 9716 2015 31356 3156 TOTAL 60070.9 10459 36122.9 10315 7892 1476 25512 2967 129598 15059 M
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-376-IrlTRODUCTION Fish population s.tudies have been conducted on Lake Anna since 1973 As of January 1, 1981 Virginia Electric and Power Company has conducted all studies "In house" by Environmental Services personnel. Prior to that date the majority of this work.was handled on a contractural basis by consulting firms.
The major objective of the Lake Anna fish sampling program is to evaluate the effects, i f any, of the heated discharge of the florth Anna Pover Station upon the fishery. Another objective is to determine fish population trends which may, or may not, be the result of water temperature and attempt to p redict the end result of these trends. Many studies have been documented concerning fish populations in newly created reservoirs and neceiving heated effluent from power plant discharges. Usually impoundment does not disastrously affect the fish population of a body of water, although species composition may change somewhat, usually in response to increased water levels and nutrient additions from newly inundated vegetation and soil. After 5-10 years the environmental conditions and fish biomass tend to stabilize (Baxter 1977; Jenkins 1977). According to this theory Lake Anna, filled during 1972, should have stable fish biomass levels. However, with Unit 1 and Unit 2 becoming operational in 1978 and 1980, respectively, the influence of a heated effluent upon the fish populations must be considered. Bodies of water which receive a heated effluent typically reach a higher temperature, warm earlier in the spring and remain warm later in the fall, and the thermocline depresses at an accelerated rate during the summer (Ruelle et al. 1977). These temperature changes would be expected to affect fish inhabiting the lake, as fish are extremely temperature sensitive. Fish can perceive a temperature difference as low as 0.05 C and are capable of selecting temperature gradients accor'dingly (Alabaster 1963) . The re fore , it is not
. . _ . , _ . ~ _ . - - .- ~ _ _ _ . --- - _-- - -. _ . . ~
I
-375- < aurprising that seasonal fish distribution in thermal plL7es is characterized by summer movement caay and winter attraction to plumes (Alabaster 1963) . Other reasons for the attraction of sport fish to heated areas during colder months I
are current and abundance of forage fish which are attracted by warmer water (Barkley and Perrin 1972; Stauffer et al. 1974). The sampling of fish in a reservoir is complicated by the problem that regardless of what type of sampling technique is employed, each has its own degree of selectivity depending upon the situation (Lagler 1966). Therefore, three ) collection methods of assessing fish abundance and distribution were employed during this study; mid water gill net, shoreline electroshock and cove rotenone. Each of these methods is di rected towards fish normally f requenting di f ferent habitats. Gill netting will capture the fishes which normally inhabit the deeper sections of the reservoir, or exhibit diel movement to and f rom the shoreline,
- while shoreline electroshocking will capture the usually smaller shoreline habitat J
fish. Cove rotenoning should collect many of the species already taken and other less common species not normally collected by the two preceding methods. This method in addition, provides a better estimate of standing crop and young of the year success for many species. The validity of electroshocking or rotenoning the same areas repeatedly has been demonstrated by King et al. (1981) and Sandoz (1959). They found that repeated electroshocking or rotenoning of fixed i i areas provide acceptable values for developing valid estimates of population l parameters. Fish removed by sampling are rapidly replaced by immigration from adjacent areas. METHODS AND MATERIALS General i I Locations of all fish collection sites are shown on Figure 10-1. Fish were collected bimonthly f rom February through December 1981 by gill net and 4 electroshock. The April electroshocking survey was, however, canceled due to i l ~ _. 1 ._. - __ _ _ _ _ _ -._ _ _ . _ _ _ _ _ . __ ,_ . , _ . _ _ . - _ _ _ _ _ _ _ . . -
-376-mechanical difficulties and rescheduled in May. Rotenone sampling was conducted during August. Generally, bottom types were similar for the same sampling method. Most shoreline electroshock stations included a brushpile, except dike
' stations which were uni formly rocky and the Elk Creek station where the original brushpile has weathered away. Experimental gill nets were set, whenever possible, near l i t toral drop-of f areas. Rotenone coves encompassed at least one brushpile.
For electroshocking and gill net collections, all fish collected were returned to the laboratory except game fish in good condition which were measured, weighed and released in the field. In the laboratory, up to 50 individuals per species from each station were measured to the nearest mm total length (T.L.) and weighed to the nearest 0.1 g. Those individuals over 50 per species were Surface water temperature ( C), dissolved oxygen enumerated and bulk weighed. (ppm), turbidity (llTU), pH and alkalinity (mg/l as CACO 3) were recorded for each s amp l e . Electroshocking Fish were collected during daylight hours by shocking a 100 m stretch of shoreline using a Type VI-A Smith-Root electrofisher operating at 1,000 volts, 3-4 amps and 60 D.C. pulses per second. This unit was operated f rom a 4.9 m Jon boat. Eight Waste Heat Treatment Facili ty (W.H.T.F.) and seven Reservoir stations were sampled on subsequent days. These stations were randomly spread throughout the entire lake system. Several stations were shocked at night during 1981 for diel comparisons tnd several additional 100 m stations were shocked adjacent to regular stations during June for immigration studies. Night electroshocking was also conducted in the spring prior to largemouth bass (Micropterus salmoides) spawning to collect ripe individuals for life history studies.
-377-Gill letting Experimental gill nets utilized in this study were 91.4L m in length and 1.63 m deep. Mets consisted of six panels, each 15.24 m long with bar mesh sizes ' ranging f rom 1.27 cm to 6.62 cm in 1.27 cm increments. flets were set at depths ranging f rom 3 to 8 meters depending upon station depth, time of year and depth of thermocline.
Five W.H.T.F. and five Reservoir stations were sampled on consecutive days, two-three stations per day. Samples were taken in shallow water in spring and always above the thermocline in summer. fiets were lef t' in the water overnight for 18-20 hours. Where upper and lower Reservoir designations are used, Route 201 is the dividing line for the Lake to coincide with earlier data. Special gill nets 50 m in length with a single bar mesh size of 7.62 cm were utilized during certain times of the year to collect adult largemouth bass and striped bass (Morone saxatills) for life history studies. Cove Rotenoning Cove rotenone samples were taken during August 1981. Six coves were sampled, four in the Reservoir (two upper, one middle and one lower) and two in the W.H.T.F. (second lagoon area) . These coves ranged in size from 0.51 to 0.88 hectares. They 'were blocked with a 75 m x 7 5 m x 6.2 mm block net secured on the cove bottom and checked by divers. A mark-recapture procedure was instituted to test the effectiveness of the rotenone. Fish were collected by electroshocking an adjacent area and 100-125 were caudal fin clipped, recorded and released inside the block net prior to the addition of rotenone to each cove. Shortly af ter the marked fish were released (5 to 10 minutes) liquid rotenone was mixed with lake water and pumped into the cove through a 6 m long hose to attempt to achieve a concentration of one part per million. A curtain of rotenone was laid down, surface to bottom, by raising and lowering the hose as the i l boat proceeded slowly throughout the cove, special attention was given to feeder i
-373-streams and beaver lodges. Fish were collected and transported to the laboratory where they were separated by species and length class, enumerated and weighed. Marked fish were measured individually and recorded. Second day collection and laboratory treatment were repeated with the exception of weights, which were not recorded due to decomposi tion but were estimated from the previous days' results. On the afternoon of the second day there was a final cove cleanup and the net was moved to the next cove.
Previous rotenone studies on Lake Anna indicated two days were sufficient for completion of a rotenone cove survey during the month of August as higher temperatures increase the toxicity of rotenone to fish and also hasten detoxification. - Data Analysis Species composition and relative abundance changes were determined 4 from a standardized netting and electroffshing program. Species diversity was determined by the Shannon-Weiner method and examined between station, Reservoir vs. W.H.T.F. for both gill net and electroshocking data. Seasonal differences were also examined for certain species. Catch per unit ef fort (C/F) was used to examine relative abundance for !, gill net and electroshock data where unit effort was catch per net day and catch par 100 m of shoreline shocked. This is based on the assumption that unit effort can be calculated on any method as long as effort (f) is in the same f uni ts (Lackey,1974) . i Summer rotenone samples provided information on standing crop, young of the year and species composition. Rctenone standing crop estinates were based i on a tag return percentage calculated from the mark-recapture technique and i cove surface area. From these data, individual species weights and numbers were ! multiplied by a correction factor to obtain the estimated standing crop (Kg/ hectare). , i l
-379-RESULTS AND DISCUSS 10tl Electroshock Shoreline electrofishing is designed to collect smaller predator and prey fishes which normally inhabit this area and is therefore a limited collection technique which must be employed in conjunction with other techniques, such as gill net and rotenone, in order to obtain accurate fish population information.
A total of 13,802 fishes, representing 21 species and nine families, was collected during electrofishing operations on Lake Anna from February - through December 1981 (Tab les 10-1 through 10-3) . Slightly more fishes were collected from the W.H.IF.than the Reservoir, 7,097 and 6,705 respectively, but 148 and 160, respectively, per station shocked, as there was one more station in the W.H.T.F. than in the Reservoir. Generally larger fishes were taken from the Reservoir, as the total Reservoir fish weight was almost twice as large as the total W.H.T.F. fish weight (Tables 10-2 and 10-3). Although 20 species were collected from both the W.H.T.C. and the Reservoir, 21 species were collected overall and 19 were common to both areas. Of these 19 species, eight were represented by only one or two individuals in the W.H.T.F. while only three species were so represented in the Reservoir (Tables 10-2 and 10-3) . Channel catfish, letalurus punctatus, were not taken from the Reservoir and shorthead redhorse sucker, Moxostoma macrolepidotum, were not collected from the W.H.T.F. This discrepancy is not unusual, however, as adults of both of these species grow to a large size and are not normally found in shallow shoreline areas. In addition, juvenile channel catfish exhibit strong schooling and hiding tendencies (Jones et al. 1978) making them less accessible to shoreline electroshocking. This species does inhabit both W.H.T.F. and Reservoir, however. Redhorse suckers are normally found only in upper Reservoir areas and.are rare in the W.H.T.F. (see Rotenone section). l e 4
- m. - -
-380-Of the nine families collected, members of the family Centrarchidae (sunfishes) were numerically dominant , comprising 98.8% of the fishes collected
- in the W.H.T.F. and 95.6% of those in the Reservoir (Tables 10-2 and 10-3) .
; Reynolds (1978) also found that the majority of fishes collected by boat electrofishing in warm water impoundments were sunfishes. The most abundant species collected in both W.H.T.F. and Reservoir was bluegill, Lepomis macrochirus (84.2% and 84.3% of the totals, respectively). Black crappie, Pomoxis nigromaculatus , was second in abundance in both W.H.T.F. and Reservoi r with .
9.5% and 7.6% of the total catch, respectively. The third most abundant species } collected was largemouth bass, a valuable gamefish, representing 2.6% of the total catch in the W.H.T.F. and 2.3% in the Reservoir. This species was closely { followed in numerical abundance in the Reservoir by pumpkinseed, Lepomis gibbosus (2.4%) and redbreast sunfish, E auri tus, (1.6%). In the W.H.T.F., pumpkinseed l also was ranked fourth but at only 1.2% of the total catch, accompanied by warmouth, L gulosus, also 1.2%. The remaining species comprised 1.6% of the total catch in the Reservoir and 1.3% in the W.H.T.F. with no species representing more than 1.0% (Tables 10-2 and 10-3). Surface temperature, dissolved oxygen, pH, turbidity and alkalinity were recorded for each station during the sampling period except February and May when no pH, turbidity or alkalinity data were recorded (Table 10-4). Temperatures in the W.H.T.F. ranged from 9.8 C at the Lagoon 3 in February to 4 32.2 C at Dike 1 in June. in the Reservoir temperatures ranged from 5.2 C at i ! the florth Anna Arm station in December, to 30.3 C at the Thurman Island station in August. Dissolved oxygen maximum and minimum values were approximately the j same in both the W.H.T.F. and Reservoir, 6.6-11.7 ppm and 6.5-12.2 ppm, respectively. Likewise, pH ranges were similar, 6.4-7.1 in the W.H.T.F. and 6.5-7.6 in the Reservoir. Turbidity values were generally similar in the t i 1
., - , - - - ,., -,y -
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-381-Reservoir and W.H.T.F. As re flected in thei r ranges ,1.8-3.5 nTu and 1.8-8.0
~
NTU, respectively. This is primarily due to greater runoff into the Reservoir and a higher percentage of agricultural land in the upper lake where llorth Anna Arm and Pamunkey Creek stations usually had the highest N'U values. A reading of 14.0 NTU recorded for the Reservoir (Thurman Island station) in December is atypical and probably represents an error in collecting the sample. Alkalinity values were generally similar at W.H.T.F. and Reservoir stations with the exception of the two upper Reservoir stations, North Anna Arm and Pamunkey Creek, which were always higher than any other stations and were primarily responsible for the discrepancy in upper range values betwean W.H.T.F. and Reservoir. Alkalinity values ranged from 6.5 to 13.0 mg/l = caco 3 in the W.H.T.F. and from 7.6 to 18 3 mg/l as CACO 3 in the Reservoir. Bluegill was the only species collected from all stations during every sampling date (Tables 10-5 through 10-16). In the W.H.T.F. It was most abundant at the Dike 1 and Lagoon 1 stations (60% of bluegill total numbers). In the Reservoir it was also most abundant at the Dike 1 station (28% of bluegill total) followed by the Dike 3 (21%) and Thurman Island stations (15%) (Tables 10-2 and 10-3). This species shows a preference for warmer water with a preferred temperature range estimated from 22-34 C (Beitinger and Magnuson 1979; Cherry et al. 1977; Neill and Magnuson 1974) so their abundance in the warmer areas is not unusual. Juvenile bluegill are normally found in shallow water near shore (Jones et al.1978) and the preponderance of the bluegill (88%) collected and measured during this study were Juvenile, <127.0 mm T.L. (Tables 10-17 and 10-18), more larger bluegill were collected from the Reservoir, however. A length-weight regression and analysis of co-variance were performed on bluegill collected from Dike 1 in the V.H.T.F. and Reservoir for fishes less than 100 mm T.L. and again on all lengths combined. No significant differences 9
- -382-(0.05 level) were found between bluegill from the W.H.T.F. and the Reservoi r.
This would indicate there is no apparent growth advantage or disadvantage for bluegill in the W.h.T.F. Black crapple, the second most frequently collected species was not taken from the Elk Creek station in the W.H.T.F. but was most abundant at the Millpond Creek station (40% of black' crapple totcl) and was infrequently collected at dike stations (Table 10-2). This species prefers dense cover (vegetation) when available (Jones et al. 1978), and there is no brush pile at the Elk Creek station whereas there is an extensive one at the Millpond - Creek station. This preference would also explain their relative absence at dike stations. In the Reservoir this species was also infrequently collected from dike stations and most abundant at the Thurman Island station (34% of total), and the North Anna Arm and Pamunkey Creek stations (28% each). All three of these stations contain extensive brush piles (Table 10-3). Largemouth 4 bass was the most abundant gamefish species and the third most abundant species overall. in the W.H.T.F. largemouth bass were found to be most abundant at the Lagoon 2 station (24%), followed by Lagoon 3 (21%) with the other stations fairly equally represented (7-12%) (Table 10-2). In the Reservoir largemouth bass were collected more frequently from the Pamunkey Creek stations (25%), with the other stations yielding from 9 to 16% of the largemouth bass total I (Table 10-3). Few large individuals were collected from dike stations. Adult largemouth bass tend to inhabit the more vegetated parts of lakes and may have a home range of about 100 m from which they of ten leave and return (Winter 1977). Juveniles, while also typically associated with aquatic vegetation, school 4 until they reach a size of about 33 mm T.L. (Jones et al. 1978) and both adults and Juveniles exhibit a fairly wide temperature preference range (27-32 C in the laboratory (Talmage and Opresko 1981)}. One would expect this species to g . - - , _ - - -, ,- -
i
-383-be somewhat evenly distributed throughout the lake due to its territorial nature and wide temperature preferenda, but concentrated in areas of "best" habitat, which is what was found. More individuals, but fewer small fish
(<l01.6 mm T.L.) were collected from the W.H.T.F. than f rom the Reservoi r (17% and 44%, respectively) but when the next length class is added to these totals they are much closer (50% and 57%, respectively) which might indicate earIIer spawning and/or faste'r growth in the W.H.T.F. (Tables 10-17 and 10-18). This phenomenon has been reported for other lakes receiving heated power station discharge (Larimore and Tranquilli 1977). Another gamefish species, chain pickerel (Esox niger) was ' collected during this study only f rom the lower lake and Contrary Creek stations in the Reservoir (two individuals each) and from the Millpond Creek and Lagoon 2 stations in the W.H.T.F. (one individual each) (Tables 10-2 and 10-3). This species, however, is not very amenable to capture by electroshocking. The fourth most abundant species in both W.H.T.F. and Reservoir was pumpkinseed which was collected in fewest numbers at dike stations (5-10% of species total) and greatest numbers at stations with extensive brush piles such as Pamunkey Creek station (30%) in the Reservoir and Lagoon 2 station (36%) in the W.H.T.F. (Tables 10-2 and 10-3). This species is recorded as preferring vegetation cover and cooler temperatures than bluegill (Jones et al. 1978). The fif th most abundant species collected differed between the W.H.T.F. and Reservoir. Redbreast sunfish was ranked fif th in the Reservoir collections. l This species, unlike pumpkinseed, appears to prefer dike stations (64% of species totals) (Table 10-3). In the W.H.T.F. warmouth was ranked fi f th in terms of numerical abundance. This species was most abundant at the Lagoon 1 station but exhibited no other evident trends (Table 10-2).
-384-Catfish, primarily yellow tctalurus natalis, and brown bullhead h nebulosus, were most abundant i n the Reservoir in the upper arms, as were gizzard shad, Dorosoma cepedianum, yellow perch, Perca flavescens, and satinfin '
shiner, Notropis analstanus (Table 10-3). Catfish were rather evenly distributed in the W.H.T.F. collections while gizzard shad, yellow perch and satinfin sniner were infrequently collected (Table 10-2). The two most numerically productive stations overali were both in the W.H.T.F., Lagoon 1 (1,983) and Dike 1 (1,853), the warmest areas surveyed, they represented 54% of the W.H.T.F. total number (Table 10-2). This numerical dominance was due primarily to the presence of large numbers of small bluegill. Other studies have also indicated that members of the sunfish family were more l abundant in heated areas than reference areas (Heill and Magnuson 1974) and that bluegill have a relatively high temperature preferendum range, as already mentioned. Other species collected from these two areas during June, when surface water temperatures were above 32.0 C were tessellated darter 1 (Etheostoma olmstedi), redbreast sunfish, yellow bullhead, pumpkinseed, warmouth, largemouth bass and black crappie (Table 10-13) . This would indicate that high temperatures due to thermal effluent are not detering fishes from entering, or remaining in these warmer areas. The most productive station in the Reservoir, in terms of total numbers, was third overall, Dike 1 (1,589) followed by Dike 3 (1,222) and Thurman Island (1,063) (Table 10-3) . These three stations also yielded the highest numbers of bluegill collected, in the same order, in the Reservoir. The fifth ranked station in the Reservoir, in terms of total numbers Pamunkey Creek ranked fi rst in total weight, due primarily to the number of large common carp (Cyprinus carpio), largemouth bass and redhorse sucker collected (Table 10-3) .
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i
-385-Lagoon 2 in the W.H.T.F., although ranked third in total numbers ,
ranked first in total weight due primarily to large numbers of adult black crapple collected there and one large channel catfish (Table 10-2, Tables 10-11 through 10-16). Lagoon 1, which ranked first in terms of total numbers , ranked second in terms of total weight (Table 10-2). Total catch was smallest during June in the W.H.T.F. followed by May, (Tables 10-12 and 10-13) due primarily to reduction in numbers of bluegill from the Dike 1 and 1st lagoon stations, in the Reservoir the smallest collection was made during August, followed by June and May (Tables 10-6, 7 and 3). The fishes appear to move into deeper areas as the surface water temperature increases. Total catch appears to be inversely correlated to surface water temperatures to some extent. Largest collections were taken during October in both W.H.T.F. and Reservoir, followed by December (Tables 10-5 through 10-16). Other studies have indicated that bluegill show a preference for thermally elevated areas in the fall but for backwater areas in the winter (Talmage and Opresko 1981) . Fish diversity was also examined at all electroshocking stations. It has been postulated that diversity may decrease with an absence of species or with a redundance of a few species (Wilhim and Doris 1968) . During this study diversity was found to be lowest at dike stations in both the W.H.T.F. and Reservoir due both to a redundance of bluegill and fewer species collected, a finding not unexpected due to the limited habitat type available (Tables 10-2 and 10-3). Dike I was the lowest of all dike stations and Lagoon 1, through higher than all the dike stations, was lowest of all other stations. Diversity versus temperature was graphed for the three lagoon stations and four of the Reservoir stations (Figure 10-2 through 10-8). Diversity was found to be generally positively related to temperature in the upper Reservoir and Thurman
-386-Island stations but negatively related in the W.H.T.F. and other lower lake stations, where temperatures were generally higher. This is not unexpected as low diversity can Indicate a stressed community and relatively high temperatures can cause species specific stress to fishes.
North Anna Arm showed the highest diversity overall, followed by Pamunkey Creek and Lagoon 2. Contrary Creek was the lowest non-dike Reservoir station, with eight of the 13 species collected represented by only one to four Individuals (Table 10-3). This was probably due to earlier stress of this area by acid mine drainage and perhaps residual elements slowly leeching from the bottom sediment. An analysis of variance was performed on diversity between various sections of the lake by combining the dike and adjacent lake station diversity means over the entire year, Lagoons 1, 2, and 3, lower lake, and Thurman Island station. No significant difference (0.05 level) was found between these sections. - SpeciesW forage"f'Ish and largemouth bass, as determined by stomach analysisS55552Ro'tenone section) collected during the past six years in the W.H.T.F. and the past two years in the Reservoir were compared by size class (Tables 10-19 and 10-20). Numbers of forage fish collected from the W.H.T.F. during 1981, per shocking day, appear higher than 1980 data but fairly consistent with previous years. Forage species collected Jin the Reservoir in 1981 appear more numeroussat the fingerling' and' intermediate sizes than in 1980. It would seem that numbers of forage fish are increasing, or at least not decreasing, although species composition may be changing. This indicates that there should be sufficient forage available for piscivorous gamefish in future y ea rs . Numbers of largemouth bass collected during 1981 electroshocking operations in the Reservoir appear to be higher at all size classes than 1980 numb e rs .
-387- )
In the W.H.T.F. numbers of :'ingerling largemouth bass collected also appear higher than in 1980 but mich lower than preceeding years. Numbers I l of Intermediate and adults collected *.ere higher during 1981 than in all but i one previous year (1977). It would appear that the Reservoir largemouth bass population is thriving and continuing to increase. The W.H.T.F. largemouth
- bass population is still sustaining large numbers of adult and intermediate fishes, and electrofish fingerling data in the W.H.T.F. may be misleading (see Rotenone discussion).
In a supplementary study, replicate 100 m samples were taken during i June 1981 at both the Dike 1 lagoon and Dike 1 lake stations. Results showed no difference between these replicates. In the Reservoir 166 fishes were i collected from replicate one and 164 from replicate two. Species were the same except that an American eel, Anguilla rostrata, was collected from one replicate, in the W.H.T.F. the regular sample yielded 51 fishes of six species i while the replicate yielded 32 fishes of five species. Three species were not I +- I common 'tu both replicates and these were each represented by one individual. These reruits are in agreement with the findings of King et al. (1981) who found that repeated electroshocking of fixed areas produces acceptable data.
- in another supplementary study nocturnal sampling was conducted in the Reservoir during July at the Thurman Island and Dike 1 sampling sites for comparison with diurnal surveys. At Dike 1 71 Individuals representing five species were collected at a temperature of 30.0 c. This compares to two other surveys at Dike 1 when 166 fishes of five species were collected during l
June (25 3 c), and 62 fishes of five species were collected during August i (28.3 c). One yellow perch and one pumpkinseed were collected during the i nocturnal survey and these species were not collected during diurnal sampling,
I
-388-while 11 largemouth bass, two black crapple and one yellow bullhead were collected during diurnal surveys but not during the nocturnal survey. At the Thurman Island station the nocturnal survey yleided 36 fishes of three species .
I while the diurnal survey yleided 115 fishes of six species during June and 74 ! I fishes of five species during August. Surface water temperatures were 30.5 C .i in July (nocturnal), 25 9 C in June and 30.3 C in August (diurnal). Seven white perch were collected during the nocturnal survey while none were taken during diurnal surveys. Again, 91 black crapple and nine largemouth bass were collected only during the diurnal survey. I t would appear, f rom these comparisons, that diurnal sampling generally yields more fishes than nocturnal sampling and, although some species may be underestimated by limiting sampling to diurnal surveys those species of major importance are sampled more regularly. Other studies have shown that nocturnal electroshocking yields better results than diurnal (Larimore and Tranquilli 1977) so additional comparisons appear to be warranted during 1982. The overall results of the 1981 electrofishing studies indicate that the fihi populations of Lake Anna are thriving and are suffering no adverse effects from thermal enrichment from the North Anna Power Station. Gill Net Stationary gill nets are designed to capture generally large predatory fishes which exhibit diel movement to and from shoreline areas and some smaller prey fishes which exhibit open water schooling behavior. A total of 1,872 fishes, representing 17 species and eight families, was collected during gill netting operations on Lake Anna from February through December 1981 (Tables 10-1,10-21,10-22). More than twice as many fishes and five additional species were collected from the Reservoir (1,293 and 17,
4
-389-respectively) than from the W.H.T.F. (579 and 13, respectively), however, one .
e species (redear sunfish) was collected only from the W.H.T.F. More larger I, fishes were collected from the W.H.T.F., since total weights were not as disproportionate (i66,820 g Reservoir and 127,702 g W.H.T.F. ) . / The species collected most frequently and in greatest numbers, overall, was gizzard shad, an important prey species for striped bass, Morone saxatills, and largemouth bass. Gizzard shad comprised 57% of the Reservoir total and 53% of the W.H.T.F. total. Channel catfish, was second in abundance (20%) in the W.H.T.F. collection (Table 10-22); while white perch, Morone americana, ranked second in the Reservoir (22%) and third in the W.H.T.F. ^ (15%). White perch, therefore, ranked second to gizzard shad in overall collection abundance. Black crapple ranked third in abundance in the Reservoir , (11%). In the Reservoir the remaining 14 species constituted 11% of the total number with no single speci ss representing more than 6% (Table 10-21) . In the W.H.T.F. the remaini,ng ten species contributed 12% with no single species comprising more than 5% of the total.
~ ~ Large gamefish, e.g. striped bass, largemouth bass and chain pickerel comprised 2% of the total catch in the Reservoir (25 Individuals) while they comprised 5% of the total in the W.H.T.F. (Tables 10-21 and 10-22). Twice as many largemouth bass were taken f rom the W.H.T.F. as from the Reservoi r. This agrees with other studies, which have reported that largemouth bass, bluegill and pumpkinseed catches per unit of of52 t were higher in heated areas (fleill and Magnuson 1974).
The five species coliscted frun the Reservoir but not from the W.H.T.F. during this survey were two suckers (Catastomidae), creek chubsucker, Erimvzon oblongus and Shorthead redhorse; one perch (Percide), yellow perch; one l
F s. Jt , l ,- '
; ; s
-390-
. 4 '
p catfish (lctaluridae), yellow bullhead; and one herring (Clupidae), blueback ( _ i) harring, Alosa 'aestivalls. All of these species except the last were t
. rqpresented by three or less specimens. " Suckers are found most often in the upper Romervoir as they are typicallyJriver forms and their preferred habitat is l'acking throughout most of the lake. Yellow perch and yellow bullhead both inhqbit the W.H.T.F. but ap; ear to be declining in abundance (see Rotenone a section). Blueback herring ere stocked;*n the Reservoir during 1980 and 1981 but not l'n the W.H.T.F., so this catch difference is to be expected. The only
- -. ~
species collected f rom the W.H.T.F. and not the Reservoir was redear sunfish, a speciesfincreasing in abundance throughout tne lake but most dramatically in the W.H.T.F. (see Rotenone section) . Surface temperature, dissolved oxygen, pH, turbidity, and alkalinity data were recorded for each station during the--sampling period except February when no pH, tuhbidity or alkalinity data were recorded (Table 10-23). Reservoir a temperatures ranged from 3.0 C at the Thurman Island station during February to 28.8 C at the Contrary Creek station during August. In contrast, highest terrperacures in the W.H.T.F. were recorded during June (33.1) at Lagoon 1, ! and the lowest temperature was 6.0 C at Elk Creek in February. Dissolved oxygen
, -values ranged from 6.3 to 12.2 ppm in the W.H.T.F. and from 6.8 to 13.5 ppm in ths Reservoir. Jhese values are well within accepted limits. Values were also similar for pH in the W.H.T.F. (6.6-7.2) and the Reservoi r (6.6-8.0) . Turbidity values usually averaged higher In'the_ Reservoi r (2.2-9.4 UTU) than in the
- ,W.H.T.F. (2.2-5.5 NTU) due to the influence of the more turbid North Anna and Ptmunkey Creeks arms and were similar to the electroshock data. Alkalinity values were also generally higher in the Reservoir (8.0-18.9 mg as CACO /31) than the W.H.T.F. (7. 4-15.0 mg as CACO 3/l) again due to the influence of the more alkaline upper Reservoir. Contrary Creek generally had alkalinity values below all other stations due to reasons already discussed in the electroshock section.
-391-Gizzard shad, the numerically dominant species collected, was taken -in the ' Reservoir f rom the lower lake and North Anna Arm stations every sampling period and Pamunkey Arm stations all sampling periods except one (Tables 10-24 through 10-29). North Anna Arm also had the highest number of gizzard shad collected (313).which was twice that of the next highest stations, Contrary Creek and Pamunkey. Arm,157 each (Table 10-21) . In the W.H.T.F.
gizzard shad were collected from Lagoon 2 every sampling period but this station had the lowest total number of gizzard shad collected during the year (Tables 10-30 through 10-35, Table 10-22). Lagoon 1 and Lagoon 3 had the highest numbers of gizzard shad collected during the year, 102 and 96, respectively (Table 10-22) . Largemouth bass were collected from all Reservoir stations except Dike 3 and only seven were collected (the Thurman Island and Contrary Creek stations each yielding three) . I n con t ras t , the' highest number of striped bass (seven) were collected from the Dike 3 station, followed by four at the Contrary Creek station (14 total collected) . Striped bass appear to prefer the deeper faster moving, warmer water entering the Reservoir f rom the W.H.T.F. while largemouth bass appear to prefer shallower, cooler backwater areas, in the W.H.T.F. more than twice as many largemouth bass were collected (19) than f rom the Reservoi r (seven) (Table 10-22). This compares to electrofish j results of 3 9 and 3.6 per shocking day for W.H.T.F. and Reservoir, respectively. This difference was also reported by Reed (1981) in earlier l l studies of Lake Anna and has been found in other heated effluent studies (Witt et al. 1970). Slightly fewer striped bass were collected in the W.H.T.F. than the Reservoir (11 vs. 14) but they were fairly evenly distributed and collected at every station (Table 10-22) . Channel catfish were collected most frequently in the Reservoir from the lower lake stations (42% of total with fairly equal distribution at the other four stations (Table 10-21) . In the U.H.T.F. 78% o i i l l l
-. _ ._ _ . - ~ _ _
-392-the total channel catfish were collected from the three lagoon stations where they were spread approximately equally (Table 10-22).
White perch were fairly evenly distributed throughout the Reservoir stations (14% to 27%) while black crappie were most abundant at the florth Anna Arm station (53%) followet b. the Pamunkey Arm station (24%), while the three remaining lower stations yielded only 23% (Table 10-21). The most productive l station in the lake in terms of biomass collected was the florth Anna Arm with 17 5% of total (Tables 10-21 and 10-22) followed by Dike 3 Reservoir and two W.ll.T.F. stations, Elk Creek and Lagoon 3 (11.5-12.0%). The least productive station was Millpond Creek in the W.H.T.F. (4.8%). The llorth Anna Arm station was also highest in terms of total number collected (25.7%) followed by Contrary Creek and Pamunkey Arm stations (14.5% and 13 7%, respectively). The W.H.T.F. station with the highest number collected was Lagoon 1 (9.7% and number four overall) followed by Lagoon 3 (8.2%) . Elk Creek yielded the largest weight of fishes collected in the W.H.T.F. and the lowest number due pr':..arily to very large common carp, striped bass and largemouth bass collected there, in the Reservoir, Thurman Island was the least productive station in terms of total number but yielded 29% of the Reservoir largemouth bass collected. The Dike 3 station , also low in total numbers, likewise yielded the largest number of Reservoir striped bass collected. These stations, which appear of minor significance upon first examination, are actually very important due to number of large gamefish which appear to frequent these areas. Numbers of fishes collected were largest during June in both the i W.H.T.F. and Reservoi r (Tables 10-24 through 10-34) . Monthly totals then declined in both areas through December, when the smallest monthly total was i collected. Gizzard shad collections were positively correlated with i
, , -<_ , - . . . - , . - - - ..r,. . . . .- , . ,
-393-temperature and showed the best correlation of any species collected. White perch and black crappie collections were also lowest during December but peaked during April and fluctuated somewhat during intervening collections.
Channel catfish collections peaked during June but were lowest during February and April. The largest numbers of gizzard shad collected in the W.H.T.F. (92) were taken in June at Lagoon 1 when surface water temperature was 33.1 C. Also taken at that time were seven channel catfish and one each white perch, redear sunfish, and bluegill (Table 10-32). This would appear to indicate - that these species, and especially gizzard shad, a major forage fish, are not adversely affected by temperatures in the lower 30's C. Diversity values are not very informative for gill net catches due to the high degree of gear selectivity, however they do offer some relative indication of station differences. In the Reservoir, diversity values were highest for the Dike 3 station and Thurman Island, where the fewest numbers of fishes were collected. The values were lowest for the upper Reservoir stations due to large numbers of one species, gizzard shad (Table 10-21). In the W.li.T.F. diversity was also highest at stations where fewer fishes were collected, Lagoon 2, Elk and Millpond Creeks; and lowest at stations showing higher catches. This was, again, due to large numbers of gizzard shad. Diversity versus temperature was plotted for Lagoons 1, 2 and 3. Dike 3 (lake) . Thurman Island, Pamunkey Arm and North Anna Arm stations (Figure 10-9 through 10-15) . There appears to be a generally positive relationship between diversity and temperatures at all stations except Lagoon 1, i where the highest temperatures were encountered and which showed a negative correlation. It would appear, from these results, that the larger, mid water fishes are less affected by higher temperatures than the smaller, shoreline fishes since electrofishing results showed negative diversity-temperature i i
4.
-394-correlations through Lagoons 1, 2 and 3 and lower lake stations.
A length f requency study of selected species f rom the W.H.T.F. and Reseivoir indicates that the sizes of collected fishes were similar in both areas for gizzard shad, chain pickerel, channel catfish, white perch and ) black crappie, (Tables 10-36 and 10-37). The only species showing a difference was largemouth bass as more larger size largemouth bass were collected -f rom the W.H.T.F. than from the Reservoi r during 1981. A previous gill net study of Lake Anna, begun in 1973, utilized six I Reservoir stations and two stations in the W.H.T.F. with nets set at each i s tation on a quarterly basis (Reed 1981). The present 1981' study omitted one of the lower lake stations of previous surveys but the other five Reservoir stations were essentially the same. Only one of the five stations in the W.H.T.F. was in the same area as the earlier studies. All nets were set on a bimonthly basis during the 1981 study. 4 , Because of these di f ferences , minor discrepancies .between 1981 and previous years' catch per unit of effort are to be expected, especially in the W.H.T.F. where these dif ferences were most pronounced. As more data were r collected during the 1981 study, these results were considered to be more reliable than past efforts. In the W.H.T.F. the only major difference was in
~
the number of channel catfish collected and the percent of total fish they represented. There appears to be a considerable increase over 980 numbers, and the highest values recorded since the studies began (Table 10-39) . , d Catfish, and channel catfish in particular, are known to prefer warmer water l (Stauf fer et al. 1974) with a temperature preference-above 30.0 C (Talmage and Opresko,1981) so their increase .is not too unusual. i r b J
, ,e - _ . _ _ . _ ,.,-.e, ,,,
m-... ..-.__n..- ._-,-,_.,_n,
-395-With collection stations approximately the same in the Reservoir, data comparisons are more meaningful. Gizzard shad collections declined in the lower lake but increased substantially at the upper stations (Table 10-38) .
Possible reasons for this~ apparent increase are discussed in the'Rotenone section. Chain pickerel catches appeared to have reached a low in 1975 and have remained steady at this level. Channel catfish catches increased slightly In the Reservoir during 1981, reaching highest recorded levels, as they did in the W.H.T.F. Largemouth bass gill net catches were relatively low in the Reservoir during 1981, however local fishermen reported high catches of citation-size (8 lbs.) bass during this year and rotenone returns were also very high (see Rotenone section). This would appear to indicate that either gill nets as a whole or these stations in particular are not accurate indicators of adult i Black crappie and white perch catches have largemouth bass population density. been holding relatively steady in the Reservoir over the past several years. Lake Anna 1981 gill net results' indicate that the fish populations of the lake are not being adversely affected by the heated water discharge of the North Anna Power Station. I i ! 1 l
-396-Rotenone Cove rotenone surveys provide the most comprehensive data of the three sampling methods employed during the 1981 Lake Anna fish population studies. The number of coves sampled is limited due to the time involved in completing this type of survey so each cover should be considered as representative of the section of the lake surrounding it.
During this study fin clipped fish were introduced into the cove prior to the addition of rotenone in order to estimate what percentage of cove fish escaped collection so that reasonably accurate population estimates could be calculated. The percent fin clip return ranged f rom 82% to 95% with a mean of 88%, for six coves. This is a much higher return percentage than the 49% m an found by Weinstein and Davies (1980) during similar rotenone studies in tidal creeks of the Cape Fear River in 1978, or the 60% average found in surveys from 1972-1973 of 60 coves by the Reservoir Committee, Southern Olvision of the American Fisheries Society (Jenkins 1975). This would appear to indicate an accurate estimation of cove populations resulting from this 1981 Lake Anna study. The predominant species by weight, overall in Lake Anna, was gizzard shad (40%) followed by bluegill (26%) , commen carp (7%), largemouth bass (5%) cnd white perch (5%). The remaining 22 species contributed 15% by weight (Table 10-40). In the Reservoi r gizzard shad again dominated by weight (49%) followed by bluegill (26%) common carp (74) white perch (5%) and largemouth bass (3%) with the remaining 22 species contributing 10% by weight (Table 10-41). In the W.H.T.F. the predominant species by weight was bluegill (27%) followed by common carp (19%) , black crappie (14%) , largemouth bass (11%) and gizzard shad (8%). The remaining ten species contributed 21% by weight (Table 10-42).
-397-There were 12 species collected from the Reservoir which were not collected during the W.H.T.F. study. These were satinfin shiner, swallowtail shiner, Notropis procne; white sucker, Catostomus commersoni; creek chubsucker; shorthead redhorse, pirate perch, Aphredoderus sayanus; bluespotted sunfish, Enneacanthus gloriosus; redbreast sunfish; tessella -d darter; American eel; walleye, Stizostedion vitreum; and striped bass (Table 10-LO).
The last two species do not spawn in the system and were stocked in the upper Reservoir in mid summer. All remaining species are minor Reservoir species probably also present in the W.H.T.F. but not collected due to the limited (two cove) sampling program. The predominant (Reservoir and W.H.T.F. combined) species on the basis of estimated numbers per hectare was bluegill (73%) followed by gizzard shad (17%). No other species contributed more than 2% and the remaining 25 species combined cor tributed 10% (Table 10-43) . This held true in the Reservoir, 72% and 20% respectively (Table 10-41) but not in the W.H.T.F. where, although bluegill again dominated (80%), black crappie was second (8%) with gizzard shad ranking seventh (1.3%) (Table 10-42). j The predominant species found during ths rotenone survey , on the basis of estimated numbers and weight per hectare, were the same as those found by electroshocking (bluegill - numbers), and gill netting (gizzard shad weight). Black crapple was found to rank second to bluegill numerically in the W.H.T.F. and also ranked second numerically in the W.H.T.F. from electroshocking results. Gizzard shad, a mid water schooling species, may have been underestimated in the i W.H.T.F. rotenone study due to the paucity of coves sampled and clustered distributioA l Water temperature during this study ranged from 27.0 C to 29.2 C and averaged 28.4 C. l l l l
398-Pamunkey Creek had the highest number and weight of fishes collected (Tables 10-40 and 10-43) due primarily to the large number of gizzard shad of-all lengths. North Anna River cove was second in weight of fish taken, due primarily to gizzard shad, and third in numbers while the Dam _ cove was fourth In weight but second in numbers due to the large number of fingerling. (<76.2 mm T.L. ) b luegi l l . This was more than three times the number of fingerling bluegill found in the next ranked cove. The remaining three coves were similar in total numbers' and weights of fishes collected. Gizzard shad, comprising 40% of the mean standing crop, was found to 1 be the dominant fish in the lake in terms of standing crop. Gizzard shad standing crop was found to be 89.4 kg/ hectare for the lake (Table 10-40), which
- is just slightly below the average standing crop of 92.0 kg/ hectare found during surveys of 170 other reservoirs since 1950 (Jenkins 1975). The upper Reservoir showed higher gizzard shad standing crop values while the W.H.T.F. and mid lake showed the lowest. This has historically been the case for the W.H.T.F.
(McNeal 1977). More smaller size gizzard shad were collected in the upper Reservoi r than in the lower Reservoir or the W.H.T.F. (Table 10-45). This phenomenon was also found in Beaver Reservoir, Arkansas by'lletsch et al. (1971) who postulated a relation of the more turbid water causing a reduction in predation on small fish and not to migration of the juvenile or pre-spawning adult fishes. Gizzard shad appear to have declined considerably in the W.H.T.F. with .the 1981 total mean only 75% of 1980 and 76% of the past six year average (Table 10-44). This 1981 decline in the W.H.T.F. could be erroneous as Reservoir gizzard shad data (Table 10-45) demonstrated the uneveness of gizzard shad distribution through their concentration in the upper Reservoir.
*-m - -- - -v- ,,---
-399-Chain pickerel, the only representative of the family Esocidae in the lake declined in both the Reservoir and the W.H.T.F. in 1981.with a mean only 10% of 1980 results (Table 10-44). This apparently reverses an increasing trend postulated by Reed (1981) for the preceeding two years. A creel study of Lake Anna by Virginia Fish and Game Commission biologists found that numbers of creeled chain pickerel consistently decreased from 1976-1980 (sledd and i
Schuber 1981), which also agrees with 1981 g!al net findings. This decline is , possibly due to a decrease in spawning areas. Chain pickerel adults were collected only in the W.H.T.F. while Juveniles were collected only from the Reservoi r dam cove (Table 10-46) . Common carp appear to have increased in the W.H.T.F. during 1981 and decreased somewhat in the Reservoir (Table 10-44) . This species seems to exhibit a preference for warmer areas with a temperature preferendum of 32 C (Benda and Proffitt 1974; Yoder and Gammon 1976), so its increase in the W.H.T.F. is not unusual. The sucker family, Catastomidae, appears to be declining throughout the lake (Table 10-44). White sucker and shorthead redhorse are found primarily in the upper lake which is to be expected as this family generally is not very heat tolerant. The creek chubsucker, collected from both W.H.T.F. and Reservoi r in previous years, also appears to be decreasing as none were collected from the W.H.T.F. during 1981. This species is typically a lotic inhabitant and 1 i ts decline in a lentic situation could be due to lack 'of suitable habitat. The catfish family is normally thought to be heat tolerant with a temperature preferendum of 30-32 C (Yoder and Gammon 1976). Howeve r , McNeely and Pearson (1974) found that in North Lake Texas, channel catfish did ] not appear to be influenced by heated effluent. Channel catfish showed an increase in the W.H.T.F. during 1981 and a decrease in the Reservoir over 1980 (Table 10-44). This compares favorably with 1981 gill net data which showed l l t l r : l L j
-400-a large W.H.T.F. Increase and a small Reservoir increase. Channel catfish were more abundant in the lower Reservoir and W.H.T.F. (94%) than in the upper Reservoir (6%). This would appear to suggest a preference for warmer water although habitats are somewhat different. The only fingerling channel catfish ~
collected were from the Reservoi r dam cove (Table 10-47) . Yellow sullhead showed a decline in the lake this year while brown bullhead, letalurus nebulosus appear to be increasing, an apparent reversal of the 1980 trends (Table 10-44) (Reed 1981). . The predominant sunfish in this study was bluegill, comprising 26% of the Reservoi r standing crop and 27% of the W.H.T.F. standing crop (by weight). This species has an affinity for higher temperatures with a preferred temperature range between 29.4-32 3. C (Cherry et al . 1977; Beitinger and Magnuson 1979) as already mentioned in the Electroshock section. Bluegill showed a decline in standing crop in the W.H.T.F. this year, however, wi th the lowest standing crop recorded since the survey began in 1975 (Table 10-44). In the Reservoir every station except Pamunkey Creek showed a decline and although 1981 Reservoi r standing crop (68.87 Kg/ha) was less than 1980 (82.77 Kg/ha) It was higher than the average of years 1975-1980 (63.8 Kg/ha) . This is probably not a true decline, however, it has been postulated that bluegill populations are negatively correlated with reservoir age (Jenkins 1970). The upper Reservoir contained the highest standing crop (Kg/ha) of bluegill with Pamunkey Creek higher than all other stations. The Dam cove had the ! highest number of bluegill, however, due to very large numbers of fingerlings
- (Table 10-48).
[ i I
-401-Pumpkinseed continued to decline in standing crop in both the W.H.T.F. and Reservoir during 1981. This species, although reported to favor warm water (Nacey 1976), appears to be more common in the upper Reservoir than the W.H.T.F. or lower Reservoi r (Table 10-11) . Pumpkinseed feed primarily on small mollusks and their pharangeal teeth , adapted for crushing (Keast 1978).
The most abundant mollusk in Lake Anna i- the Asiatic clam, Corbicula fluminea, which has a harder shell than most me llusks and pumpkinseed may not be able to feed upon this clam, perhaps contributing to its decline. This species also feeds on sof ter bodied organisms such as Chironomids or Cladocera (Keast 1978) but the bluegill, which is adapted to feed upon these organisms with needlelike pharangeal teeth, would probably out-compete pumpkinseed for this resource. Redear sunfish on the other hand, continued to increase in both Reservoir and W.H.T.F. during 1981 (Table 10-44) possibly due to increasing numbers of Asiatic clam which appear, from stomach analysis, to be its major food source. Largemouth bass standing crop increased in 1981 with the highest weight per hectare (10.7 Kg) recorded for the lake since the survey began in 1975 (Table 10-44), reflecting more large fish caught. This compares well with the average mean standing crop of largemouth bass found in surveys of 170 reservoirs since 1950 of 10.0 Kg/ha (Jenkins 1975). The numbers of citation-size largemouth bass caught during 1981 were also higher than any previous year. Largemouth bass fingerlings , intermediates and adults were distributed well throughout the lake (Table 10-49). More fingerling bass (<127 0 mm T.L.) per hectare were collected f rom the Reservoir (85% of total) than from the W.H.T.F. (131/ha and 24/ha, respectively). When the next two i size classes are included (up to 177.8 mm T.L.) this difference is reduced ! (135/ha and 62/ha, respectively). This, again, could be due to earlier l
-402-3 spawning and/or faster growth in the W.H.T.F. In addition, a radio telemetry study of largemouth bass in Lake Sanchris, Illinois found that tagged bass released in the warmwater area in spring generally traveled to cooler areas during the summer, apparently avoiding elevated water temperatures (Larimore and Tranquilli 1977). They also found that as the lake warmed naturally the highest concentration of bass shifted progressively from station to station towards cooler water. It is possible, therefore, that Juvenile largemouth bass were undersampled in the W.H.T.F. becauss of limited sampling and clumped distribution due to thermal effects as opposed to the relatively even distribution fround in the Reservoir.
Black crappie standing crop increased in the W.H.T.F. to the highest level since 1976 and decreased in the Reservoir, following a trend begun in 1976 (Table 10-44). This dif ference between the W.H.T.F. and Reservoir data is i even more noticeable when estimated numbers are examined by length class (Table 10-50). The lowest black crappie standing crop was found in both upper Reservoir stations. This is at variance with a temperature preference range of 20.0-25.0 C (Ruelle et al. 1977). However, there is a considerable amount of shore development and runoff erosion in these areas and black crapple have 1 been postulated to respond negatively to increased shore development and total dissolved solids (Jenkins 1970). Virginia Fish and Game Commission biologists noted that the black crappie creel harvest " bottomed out" in 1979 (Sledd and Schuber 1981) and postulated that the decline may be due, at least in part, to absence of good shoreline structure. Black crapple may have been underestimated by cove rotenone surveys as they tend to remain in deeper water near underwater structures during the t warmer months. The decline shown by decreased creel harvests may be because these fish have become generally smaller (stunted) throughout the lake over the past several years and more and more fishermen have probably switched to fishing
-403-primarily for larger species (i .e. largemouth bass) thereby reducing the creel harvest. Therefore, although the black crapple standing crop may be decreasing, it is probably higher than these estimates indicate.
Yellow perch continued to decline in standing crop in 1981, down at all stations except Pamunkey Creek, where it exhibited a small increase. This species began to decline in 1977 and by 1981 the standing crop was down 30% f rom 1980 results and 53% f rom 1977 totals (Table 10-44) . Yellow perch is a cool water species (Ruelle et al. 1977) preferring temperatures from 20-23 C (Cherry et al. 1977), which may be a contributing' factor in their decline in a thermally enriched envi ronment. Yellow perch were extremely scarce in the W.H.T.F. In 1981 (3% of total) and in the Reservoir the Dam cove yielded almost all of the fingerling yellow perch collected in the lake (94%) (Table 10-51). This distribution is similar to the fingerling bluegill di stribution (Table 10-48) . Walleye were collected only at the Pamunkey Creek station in 1981 (Table 10-44) which is not unexpected as they were stocked near that area in the spring of 1981. Walleye is a highly piscivorous and opportunistic feeder. Yellow perch appear to be the preferred forage species, when available in suf ficient numbers but in areas where yellow perch are not readily available walleye tend to feed on the predominant available forage species (Ryder and Kerr 1978). State biologists anticipate that walleye will feed on the white perch population in Lake Anna which appears to be. undergoing expansion (Sledd and Schuber 1981) . White perch have, in fact, shown the most dramatic increase of any fish species in Lake Anna over the last six years (Table 10-44) . The lake standing crop increased at all stations in 1981, an almost threefold increase over 1980 standing crop. This species was introduced into Lake Anna I
-404-some years ago, probably incidently with the striped bass stocking program and has obviously thrived. Although not officially recognized as a game fish there has been an " increased willingness of anglers to harvest this species" in Lake Anna (Sledd and Schuber 1981).
Striped bass fingerlings, also recently stocked, were collected from two stations, Pamunkey Creek and Mid Lake (Table 10-44). These two stations are the only ones where striped bass fingerlings have been collected during the past four years. This species appears to be thriving in Lake Anna but since it has shown no signs of spawning in the lake, continued stocking will be necessary. Pamunkey Creek cove and Moody Creek cove were the only two stations showing an overall increase in total standing crop over 1980 results (Table 10-44) . Pamunkey cove was, as it has historically been, the most productive cove with 65% more Kg of fish per hectare than the next most 4 productive cove, North Anna Arm, and more than the other three Reservoir coves combined. This dominance was not true for numbers per hectare (Table 10-43) due to very large numbers of bluegill fingerlings collected from the Dam cove. Pamunkey Creek is also highest in nutrients, zooplankton, etc. possibly due to runof f f rom surrounding farmlands as there is more agricultural activity in this section than in other areas. In terms of total biomass the W.H.T.F. and lower Reservoi r coves were lowest, averaging 147 Kg/ha and 145 Kg/ha, respectively while the upper Reservoir averaged 382 Kg/ha (Table 10-44) . In a rotenone study of 38 ponds in the north central United States during 1973-1974, total biomass ranged from 105 to 804 Kg/ha (Reynolds and Simpson 1978). North Anna values fall into the lower end of that range and are far below the 965 Kg/ha found in Lake Barkley, Kentucky during an extensive and intensive fish sampling survey conducted in 1978 (Fisheries Bulletin, July 1979) .
-405-An attempt was made to determine forage species and changes in their abundance by size class during the past four years in the Reservoi r and W.H.T.F. (Tables 10-52 and 10-53). Species included in the forage fish category were determined f rom examinations of largemouth bass and striped bass stomach contents. Actual predator prey biomass comparisons, as described by Jenkins (1977) were not attempted as they are very difficult to calculate since certain nebulous values must be determined, such as: what percentage of the gizzard shad standing crop is derived from indiduals no longer in the food
~
chain?; at what length does a species such as yellow perch shift f rom a prey to predator mode?; can channel catfish be considered a piscivorous predator?; etc. Changes in size class abundance of largemouth bass are also included in the tables. Numbers of forage size gizzard shad and other forage fish species in the Reservoi r during 1981 appear to have increased over the past several years (Table 10-52). The numbers of largemouth bass fingerlings and intermediates were down slightly while the number of adults was up, resulting in an overall increase in standing crop weight. In the W.H.T.F. the numbers of gizzard shad and other forage fish species appear to be contincing to decline (Table 10-53) and were comparatively low in 1981. These forage fish findings for 1981 do not agree with 1901 l electroffsh forage results in the W.H.T.F. which, as already discussed, found l numbers to be relatively steady over the past several years. Due to the greater number of electrofish samples taken and the larger number of sites sampicd it would appear the electrof f sh results are more correct in this case. l Humbers of largemouth bass fingerlings in the W.H.T.F. have also been declining for several years and reached a new low in 1981. Numbers of intermediate and adult fishes were higher in 1981. These findings would appear l I
- . ~. _ ._-
-406-to bode well for the future of the largemouth bass and striped bass fishery in the Reservoi r, and in the W.H.T.F. to a lesser degree.
Ordinarily largemouth bass populations in a newly formed reservoir follow a predictable cycle with good catches of bass in the second through fourth years followed by a decline in abundance in the fifth through seventh years. From the eighth year, bass yields are very low as common carp and 4 shad dominate (Larimore and Tranquilli 1977). This was not found to be the case in Lake Sangchris where the population has remained relatively stable 11 years after initial stocking with good reproducing populations, nor in Lake Anna. Nine years af ter impoundment of Lake Anna, the largemouth bass ] population appears to be flourishing. This continued high productivity has been variously attributed to influences of increased temperature on i spawning and growth of largemouth bass and also, somewhat, to the improved distribution of nutrients and reduction of stratification (Larimore and Tranquilli 1977). The decline in abundance in yellow ~ perch, black crappie and, possibly, bluegill found in this study could be related to increased water temperatures or through natural reservoir aging. Ruelle et al. (1977) found the declines in abundance of these three species in a South Carolina reservoir used for cooling water by a nucle ar power plant appeared to be related to increased water temperature. Declining numbers also may have resulted from trends associated with reservoir aging (Jenkins 1970) through natural causes. Decline in black crappie standing crop has previously been mentioned as possibly related to lack of shoreline structure. Initial high fish yields in new reservoirs are due to abundant food suppl'y and cover for young fish by flooded vegetation (Baxter 1977) . In Lake Anna, initially flooded vegetation has been reduced to detritus, shoreline development and trapping has reduced the beaver population i
-407-and thereby beaver lodges on the lake, and work crews regularly cut trees which have fallen, or are about to fall, into the lake. This has reduced the amount of ccver in the lake considerably and this lack of cover increases the vulneraollity of small fish to piscivorous predators, and could be a factor in the declining numbers of certain species.
The Virginia Commission of Game and inland Fisheries has recommended introducing threadfin shad (Dorosoma petenense) and/or blueback herring into the lake to provide more forage. The results cf this study would appear to support i the introduction of a new forage species into the lake to supplement the existing gizzard shad population, but there are problems with the species l proposed. Gizzard shad and threadfin shad are potential competitors for food as both species ingest essentially the same organisms (Baker and Schmitz 1971) and in addition, threadfin shad are more susceptable to winter kill. In view of the above it would seem doubtful that the introduction of threadfin shad would greatly increase the clupeld standing crop and may create winter die off problems should the artificial heat source be lost during winter months. The introduction of blueback herring could actually have a negative impact on the sport fishery as they selectively feed on large zooplankton and therefore potentially compete for food with young sport fishes and even occasionally feed on small game fish (Prince and Barwick 1981). It is therefore recommended that this preposed stocking program be more thoroughly investigated i .
- be fore being implemented.
l i l
-408-Adult Fishes Summary
- 1. Gizzard shad is the predominant species, in terms of standing crop,- in Lake Anna although bluegill appears to be the predominant species by weight in the W.H.T.F., and is the most numerous species overall.
- 2. The upper Reservoir, particularly Pamunkey Creek arm, is the most productive area of the lake, which has historically been the case.
3 The upper Reservoir, particularly Pamunkey Creek arm, appears to be the nursery area for gizzard shad while the lower Reservoir fulfills this function for certain other species; the dam cove provided the largest fingerling collection of bluegill, chain pickerel, channel catfish and yellow perch.
- 4. Chain pickerel, yellow perch and pumpkinseed standing crops continued to.
decline in the lake during 1981.
- 5. Channel catfish standing crop appears to be increasing in the W.H.T.F.
and possibly in the Reservoir as well.
- 6. Bluegill standing crop may have declined slightly during 1981.
7 Redear sunfish continued to increase in standing crop during 1981, possibly related to increasing numbers of Asiatic-clam, on which they appear to feed.
- 8. Largemouth bass standing crop increased during 1961 to the highest level since rotenone surveys began in 1975 The supply of fingerlings appears to be sufficient for the continued success of the fishery in the Reservoir and W.H.T.F. but the number of fingerlings may be lower in the W.H.T.F. and should be closely monitored in the future.
9 Black crappie standing crop appears to be declining in the lake possibly due to lack of soltable cover.
-409-
- 10. White perch standing crop increased dramatically during 1981 In the lake.
'This. species may become a substantial component of the sport fishe ry in the future and could possibly become a major forage species for walleye and other piscivorous predators.
- 11. Continued stocking of striped bass and walleye are necessary. as neither species has been documented to spawn in the lake.
- 12. The standing crop of forage species appears to be sufficient in the lake although possibly declining in the W.H.T.F. Stocking of a new forage species might be beneficial but there are potential problems with both species proposed for introduction.
13 The thermal enrichment of Lake Anna by operation of the North Anna Power Station does not appear to be adversely affecting the fish population. Subtle changes in species composition of.the lake which are occurring are possibly not temperature related and, in any case, do not appear to be affecting the amount of forage available to game fishes. l i l
-410-LITERATURE CITED Alabaster, J. S. 1963 The effect of heated ef fluents on fish. Journal of Air and Water Pollution 7:541-563 Baker, C. D. and E. H. Schmi tz. 1971. Food habits of adult gizzard and threadfin shad in two Ozark Reservoirs. Pages 3-11 Ill G. E. Hall, editor. Reservoir Fishes and Limnology. Special Publication number 8. American Fisheries Society. Washington, D. C.
Barkley, S. W. and C. Perrin. 1972. The effects of the Lake Catherine steam
' electric plant ef fluent on the distribution of fishes in the receiving embayment. Proceedings of the Annual Conference of the Southeast Association of Game Fish Commissioners. 25:384-392.
Baxter, R. M. 1977. Environmental effects of dams and impoundments. Annual Review of Ecological Systems 8:255-83 Baltinger, T. L. and J. J. Magnuson. 19 79 Growth rates and temperature selection of bluegill, Lepomis macrochi rus. Transactions of the American Fisheries Society. 108:378-382. Benda, R. S. and M. A. Proffitt. 1974. Effects of thermal effluents on fish and Invertebrates. Pages 438-447 iti J. W. Gibbons and R. M. Sharitz editors. Thermal Ecology. Technical Information Center Office of Information Services. U. S. Atomic Energy Commission, CONF-730505 Springfield, Virginia. Cherry, D. S. , K. L. Dickson and J. Cai rns , J r. 1977 Preferred, avoided and lethal temperatures of fish during rising temperature conditions. J ournal of Fisheries Research Board of Canada. 34:239-246. Fisheries. 1979 Barkley Reservoir fish study reveals over 850 pounds of fish to acre. Bulletin of the American Fisheries Society. 4:44. Jenkins, R. M. 1970. The influence of engineering design and operation and other environmental factors on reservoir fishery resources. Water Resources Bulletin of the Journal of American Water Resources Association 6(1):110-119 1975. Black bass crops and species associations in re s e rvo i rs . Pages 114-125 IN H. Clepper, editor. Black bass biology and management. Sport Fishing Institute. Washington, D. C. 1977 Prediction of fish biomass, harvest and prey predator relations in reservoi rs. Pages 282-293 IN W. Van Winkle editors. Proceedings of the conference on assessing the effects of power plant induced mortality on fish populations. Pergammon Press. New York. a Jones , P. W. , F. D. Martin and J. D. Hardy, Jr. 1978. Development of fishes of the Mid-Atlantic bight. Center for environmental and estuarine studies of the University of Maryland #783 United States Fish and Wildlife Service.
, , , _ _ _ , _ , , , - __u- s- -- ' ' - - ^ *
-411-Keast, A. 1978. Feeding interrelations between age groups of pumpkinseed (Lepomis gibbosus) and comparisons with bluegill (L. macrochirus).
Journal of the Fishery Research Board of Canada 35: 12-27 King, T. A., J. C. Williams, W. D. Davies and W. L. Shelton. 1981. -Fixed versus random sampling of fishes in a large reservoi r. Transactions of the American Fisheries Society 10:563-568. Lackey, R. T. 1974. Introductory fisheries science. Virginia Polytechnic Ins titute and State Universi ty. Blacksburg, Virginia. Lagler, K. F. 1968. Capture, sampling and examination of fishes. IN W. E. Ricker editor. Methods of assessment of fish populations in freshwater. Blackweal Scientific Products. Oxford, England. Larimore , R. W. and J. A. Tranqui l l i . 1977. Annual report for fiscal year 1976 Lake Sangchis project. Illinois Natural History Survey. Urbana, Illinois. Marcy, B. C. 1976. Fishes of the lower Connecticut Yankee Plant. The Connecticut River Ecological Study. American Fisheries Society Special Publication
#1.
McNeal, J. R. 1977 An age and growth study of the gizzard shad, Dorosoma cepedianum, (Le Seur), in Lake Anna, Vi rginia. Masters thesis. Virginia Commonwealth University. Richmond, Virginia. McHeely, D. L. and W. D. Pearson. 1974. Distribution and condition of fishes in a small reservoir receiving heated waters. Transactions of the American Fisherles Society. 3:518-530. Neill, W. H. and J. J. Magnuson. 1974. Distributional ecology and behavioral thermoregulation of fishes in relation to heated effluent from a steam electric power plant at Lake Monona, Wisconsin. Transactions of the American Fisheries Society 103:663-710. Netsch, H. F., G. M. Kersh , J r. , A. Houser and R. V. Ki lambi . 1971. Distribution of young gizzard and threadfin shad in Beaver Reservoi r. Pages 95-105 IN G. E. Hall, editor. . Reservoi r Fishes and Limnology. Special Publication number 8. American Fisheries Societ,. Washington, D. C. Prince, E. D. and D. H. Ba rwick. 1981. Landlocked blueback herring in two South Carolina Reservoirs: reproduction and suitability as stocked prey. North American Journal of Fisheries Management 1:41-45 Reed, J. R. and Associates , Inc. 1981. Annual Report: Environmental study of Lake Anna, Vi rginia. Prepared for Virginia Electric and Power Company. Richmond, Virginia. Reynolds, J. B. 1978. Electrof f shing efficiency and its influence on stock assessment strategy. U. S. Fish and Wildlife Service. University of Missouri. Columbia, Missouri.
-412-Reynolds, J. D. and D. E. Simpson. 1978. Evaluation of fish sampling methods and rotenone census. Pages 11-24 IN new approaches to the management of small impoundments. North Central Division, American Fisheries Society Special Publication number 5 Ruelle, R. , W. Lorenzen and J. Oliver. 1977. Population dynamics of young-of-the year fish in a reservoir receiving heated effluent. Pages 46-67 IN W. Van Winkle editor. Proceedings of Conference on assessing the effects of power plant induced mortality on fish populations.
Pergammon Press. New York. Ryder, R. A. and S. R. Kerr. 1978. The adult walleye in the Percid connuni ty-A niche definition based on feeding behavior and food specifity. Pages 39-52 IN R. L. Kendall editor. Selected coolwater fishes of North America. American Fisheries Society. Special publication numbe r 11. Washington, D. C. Sando z , V. 1959 Changes in the fish population of Lake Murray _ folicwing the reduction of gizzard shad numbers. Proceedings of the Oklahoma Academy of Science. 37: 174-181. Sledd, C. A. and D. J. Shuber, 1981. Project completion report for Virginia Dingell-Johnson project F-33-R. Virginia Commission of Game and inland Fisheries. Richmond, Virginia. Stauf fer, J. R. , J r. , K. L. Dickson and J. Cai rns, J r. 1974. A field evaluation of the effects of heated discharges on fish distribution. Water Resources Bulletin. 10:5(860-876). Talmage, S. S. and D. M. Opresko. 1981. Literature review: Responses of fish to thermal discharges. Electric Power Research Institute EA-1840. Project 877, ORNL/EIS-193 Palo Alto, California. Weinstein,M. P. and R. W. Davies. 1980. Collection efficiency of seine and rotenone samples from tidal creeks, Cape Fear River, North Carolina. Estuaries 3:98-105 Wilhim, J. L. and T. C. Doris. 1963. Biological parameters for water quality criteria. BloScience 13:477-481. Winter, J. D. 1977 Summer have range movements and habitat use by four largemouth bass in May Lake, Minnesota. Transactions of the American Fisheries Society. 106:323-330. Witt, A., R. S. Campbell and J. D. Whitley. 1970. The evaluation of environmental alterations by thermal loading and acid pollution in the cooling reservoir of a steam electric station. Missouri Water Resources Research Center. University of Missouri. Columbia, Missouri. Voder, C. O. and J. R. Gammon. 1976. Seasonal distribution and abundance of Ohio River fishes at the J. M. Stuart Electric Generating Station. Pages 284-295 IN G. W. Esch and R. W. McFarlane editors. Thermal Ecology II. Technical information center of the energy research and development administration. CONF-750425. Springfield, Vi rginia. 1
- -s.
-413-TABLE 10-1. LIST OF FISHES COLLECTED BY ELECTROFISHING (EF), l
, CILLNET (GM) AMD ROTEHOME (RO) FROM LAKE AHMA DURIHG 19A1. I i
)
l GH EF 20 j OSTEICHTHYES ' ARGUILLIDAE - freshwater cels AMGUILLA ROSTRATA - Anerican eel X X CLUPEIDAE - herrings ALOSA AESTIVALIS - blueback herring X DOROSOMA CEPEDIANUM - gi==ard shad X X X ESOCIDAE - pikes ES0X HIGER - chain picherel X X X CYPRINIDAE - minnows and carps CYPRIHUS CARPIO - common carp X X X HOTEMIGONUS CRYSOLEUCAS - golden shiner X X X HOTROPIS ANALOSTANUS - satinfin shiner X X HOTROPIS PROCHO - swallowtail shiner X CATOSTOMIDAE - suckers CATOSTOMUS COMMERSONI - white sucker X ERIMYZOH OBLONGUS - creek chubsucker X X X MOXOSTOMA MACROLEPIDOTUM - shorthead redhorse X X X ICTALURIDAE - bullhead catfishes ICTALURUS NATALIS - yellow bullhead X X X ICTALURUS HEDULOSUS - broun bullhead X X X ICTALURUS PUNCTATUS - channel catfish X X X I APHREDODERIDAE - pirate perches APl!REDODERUS SAYAMUS - pirate perch X l PERCICHTIlYIDAE - temperate basses MOROME AMERICAMA - white perch X X X i MORONE SAXATILIS - striped bass X X 1 i
-414-TABLE 10-1. LIST OF TIS!!ES COLLECTED BY ELECTROTISHING (E7),
GILLMET (GH) .. i D ROTEHO;(E (RO) FROM LAME AHHA DURING 1981. GM ET RO CENTRARCilIDAE - sunfishes EHHEACANTHUS GLORIOSUS - bluespotted sunfish X LEPO!!IS AURITUS - redbreast sunfish X X LEPOMIS GIBBOSUS - pumphinseed X X X LEPO!!IS GULOSUS - unrmouth X X LEPO!!IS M AC RO CIIIRUS - bluogill X X X LEPOIIIS MICROLOPHUS - rodear sunfish X X X MICROPTERUS SALM0 IDES - largemouth bass X X X PO!!OXIS HIGR0 MACULATUS - black. crappie X X X PERCIDAE - Perches ET!!EOSTOMA OLMSTEDI - tessellated darter X X PERCA FLAVESCENS - yellou perch X X X STIZOSTEDION VITREU!! - ualleye X i
ft.BLE 10-2. HUMBER. WEIGHT. flUMBER OF SPECIES. lAl!1BER OF FAMILIES Ato DIVERSITY OF ALL FISiiES COLLECTED DY ELECTROFISHIttG AT ALL MitTF STATI0tt3 DUR1t1G 1981. HILLP0to ELK CREEK DIKE 1 DIKE 2 DIKE 3 LAG 0004 1 LAGOON 2 LAGOON 3 TOTAL AtlGUILLA POSTRATA . . 1 . . . 1 . 2 CYFR!tlUS CARPIO 1 . . . . . . . 1 CO?OSot1A CEFEDIAHUN 1 . . 1 . . . . 2 ERIT 1(ZOtl 03LCilGUS . . . . . 1 . 1 E00X 111GER 1 . . . . . 1 . 2 F Tl!EOSTOIIA OLttSTEDI . . . . . 2 . . 2 ICTALURLIS IIATALIS 4 4 2 5 1 . 1 . 17 1CTAttatJS llEBULOSUS 3 5 2 4 . 2 2 6 24 ICTALURUS 51JttCTATUS . . . . . 1 1 . 2 LEFO!!IS AURITUS . . 2 15 3 10 . 2 32 LEF0tlIS CIEC00133 13 2 4 2 2 17 32 16 CS LEFOt11S GU*OSUS S 5 15 5 14 23 12 7 86 LFPOt11S ttACT'OCHIRUS 366 158 1801 529 444 1733 410 464 5905 LEFntlIS 11ICR0t0P!!US 2 1 1 . . 18 7 8 37 11ICRCPTERUS SALM31 DES 23 19 17 15 14 13 46 39 .186 t10 Rot 4E At1ERICAttA 6 2 . 1 . . 2 3 14 tt0Til11GC!lUS CRYSQLEUCAS . . . . . . 1 1 2 MOIPOPIS t.!!ALOSTAtlUS . . . . 2 . . . 2 : PERCA FLAVE*CEt:3 8 4 . . . . 1 4 17 f P0t10XIS HIGRO:tACULATUS 268 . 8 1 1 163 211 23 675 m 578 481 1983 728 573 7097 ' 1:Ut1 DER OF IllDIVICUALS 701 200 1853 TOTAL HEIG!!T 14636 3548 12220 7826 3648 16522 22125 7336 87861 ffJt1CER OF FAti! LIES 7 4 3 4 3 4 7 5 9 I:Ut:3ER OF SPECIES 13 9 10 10 8 11 14 11 20 HJR1t1E 1.6124 1.2542 0.2549 0.6345 0.5521 0.7784 1.7214 1.2074 1.0257 EVEl#lESS 0.4357 0.3957 0.0767 0.1910 0.1840 0.2250 0.4521 0.3490 0.2373 RICit!!ESS 1.2694 1.0466 0.8291 0.9809 0.7856 0.9130 1.3673 1.0914 1.4852 . 4
TABLE 10-3. HUrBER. WEIGHT, t4UtBE2 OF SPECIES.14kBE2 OF FAttILIES Ate DIVE;SITY OF ALL FISHES COLLECTED BY ELECTROFISHING AT ALL CESEIVOIR STATIO*45 DURIIG 1981. DIKE 1' OIKE 3 LOWER LAKE THURt1AN C0t4TRARY ta0RTH AtNA PAtu MEY TOTAL ISLAIS CREEK ARN ARtl AtlGUILLA ROSTRATA . . . . . 2 . 2 CYPRIt4US CARPIO . . . 4 . . . 4 8 DOROS0ttA CEPEDIANUM . 3 2 . 1 40 13 59 ERINfZO!I ODLot3GUS . . 10 . . . 1 11 ES0X llIGER . . 2 . 2 . . 4 ETHEOST0t1A OLHSTEDI . . 2 1 2 . . 5 ICTALURUS t4ATALIS 1 1 . I 1 . 4 8 ICTALURUS ttEBULOSUS 3 2 2 3 3 18 16 47 LEP0t115 AURITUS 26 38 4 17 4 17 1 107 LEPONIS GICCOSUS 5 3 25 20 21 35 48 157 LEP0ttIS GULOSUS 10 13 35 3 3 5 1 70 LEF0t115 itACROCHIRUS 1509 1143 633 798 531 345 445 5404 LEFCitIS tlICROLCFHUS 2 . 1 . . . . 3 HICROPIERUS Salt 101 DES 23 13 15 24 18 21 38 152 tt0RotiE At1ERICAt34 . . . . 4 1 . 5 t10X0ST0llA ttACROLEPIDOTIM . . . . . . 2 2 HOTEtlIGot:US CRYSOLEUCAS . . 10 13 . 6 . 29 a
!!OTROPIS AttALCSTAtlUS 4 3 25 PERCA FLAVESCEtiS 4 2 3 9 20 22 19 54 57 f
m Pott 0XIS t1IGR0t1ACULATUS 10 2 26 177 11 149 146 521 ' I I:Ut1CER OF It0!VIDUALS 1589 1222 777 1063 610 684 760 6705 total llEIGili 15618 8137 15500 30770 15046 24110 44220 153421 18210ER OF FAMILIES 2 4 7 4 6 7 6 9 liut1BER OF SFEC1ES 9 10 16 12 13 13 14 20 tt_PRIttE 0.4104 0.4936 1.2779 1.2602 0.9407 2.3345 2.0158 1.2828 EVEl#!ESS 0.1295 0.1426 0.3195 0.3515 0.2542 0.6309 0.5294 0.2968 RIEttt!ESS 0.7523 0.8776 1.5622 1.0941 1.2969 1.2742 1. 358'e 1.4948
-417-TABLE 10-4. PHYSICAL PARAMETERS RECORDED AT ELECTROFISHING STATIONS DURING EACH SAMPLING PERIOD DURING 1981. TEMPERATURE (DEGREES C). DISSOLVED OXYGEN (PPM), P 't . TURBIDITY (NTU), AND ALKALINITY (MG/L CACO 3).
MONTH SITE TEMP 02 PH TURB ALK TEBRUARY MILL 2 9.9 11.2 . . . ELE CRK 10.8 11.4 . . . DIME 1 13.9 11.7 . . . DIKE 2 11.3 11.2 . . . DIKE 3 9.9 11.2 . . . LAGOON 1 13.6 11.0 . . . LAGOON 3 9.8 10.8 . . . LAGOOH 2 10.9 . 11.2 . . . TH IS LA 6.2 12.0 . . . DIK 1 LA 6.2 11.8 . . . DIK 3 LA 8.1 11.4 . . . LOW L CO 7.4 11.4 . . . CCNTRARY 6.2 12.2 . . . NA ARM 7.6 11.9 . . . PAMUNKEY 8.3 10.4 . . . MAY MILL 2 20.8 9.2 . . . ELK CRK 21.9 9.4 . . . DIKE 1 24.1 9.0 . . . DIKE 2 22.2 9.1 . . . DIKE 3 21.1 9.2 . . . LAGOON 1 23.5 9.1 . . . LAGOON 3 20.8 9.2 . . . LAGOOH 2 22.7 9.1 . . . TH IS LA 17.5 9.6 . . . I DIK 1 LA 18.2 8.5 . . . DIK 3 LA 19.5 8.4 . . . LOW L CO 19.3 8.8 . . . CONTRARY 20.1 8.5 . . . NA ARM 19.1 9.2 . . . PAMUNKEY 18.5 8.5 . . . JUNE MILL 2 28.3 7.5 7.1 3.4 12.5 ELK CRK 29.2 7.1 6.7 3.2 10.5 DIKE 1 32.2 7.4 6.7 1.9 12.0 DIME 2 30.2 6.9 6.7 1.8 10.5 DIME 3 28.3 7.2 6.6 2.6 10.0 LAGOON 1 31.8 7.2 6.7 2.4 10.0 LAGOON 3 28.6 7.1 6.6 2.4 9.5: LAGOON 2 30.0 7.2 6.7 2.0 11.0 TH IS LA 25.0 7.2 7.2 3.0 12.1' DIK 1 LA 25.3 7.2 7.2 2.7 11.2 DIK 3 LA 25.2 6.5 7.0 2.8 10.9 LOW L CO 25.4 6.6 7.0 2.8 10.9 CONTRARY 26.2 7.8 7.2 2.2 11.2 NA ARM 25.9 8.4 7.6 4.9 18.0 PAMUNKEY 26.5 . 7.5 6.7 18.3
. . _ _ _ . _ ___-+____.2 -
_ - A m -_aJ. _ _ - - ama3_.Aa- _.%a - _u_ _m,ae :4a m - an. A 1. _. ___- _ _ , . . . i 418-1 TABLE 10-4. PHYSICAL PARAMETERS RECORDED AT ELECTROFISHIMG STATIONS DURING EACH SAMPLING PEEIOD DURING 1981. TEMPERATURE (DEGREES C), DISSOLVED OXXGEN (PPM), PH, TURBIDITY (HTU). AMD ALMALIMITY (MG/L CACO 3). MONTH SITE TEMP 02 PH TURB ALK AUGUST MILL 2 30.0 7.4 6.6 2.6 10.9 ELK CRK 30.4 7.7 6.8 2.4 10.3 DIKE 1 31.0 7.3 6.7 3.0 10.2 DIME 2 30.6 7.4 6.7 2.0 10.6 DIME 3 30.0 7.6 6.4 2.3 9.8 LAGOON 1 30.3 7.1 6.7 4.0 9.5 LAGOOM 3 29.8 7.7 6.6 2.5 9.3 i LAGOOM 2 30.9 6.6 6.6 2.7 10.2
! TH IS LA 30.3 7.2 6.7 3.0 10.0 j DIN 1 LA 28.3 7.6 6.7 1.8 10.7 DIK 3 LA 28.9 6 .- 5 6.7 2.3 10.8 LOW L CO 29.3 6.7 6.5 4.6 10.5 CONTRARY 28.6 7.6 6.8 2.0 10.1 MA ARM 28.1 7.3 7.3 8.5 14.8 PAMUNKEY 28.0 7.4 . . .
OCTOBER MILL 2 19.0 7.8 7.0 6.9 9.8 l ELK CRK 19.8 7.8 7.1 8.0 13.0}}