ML20085M475

Environ Monitoring Program 1979 Annual Rept. W/Two Oversize Encls

ML20085M475
Person / Time
Site:	Robinson
Issue date:	12/31/1979
From:	Ball L, Hogarth W, Ward B CAROLINA POWER & LIGHT CO.
To:
References
RTR-NUREG-1437 AR, NUDOCS 9111110038
Download: ML20085M475 (226)

Text

. __ _ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - _

H.B. ROBINSON STEAM ELECTRIC PLANT ENVIRONMENTAL MONITORING PROGRAM 1979 ANNU AL REPORT ENVIRONMENTAL TECHNOLOGY SECTION CD&L Caiolina Power & Light Company l

P kn EEU 1437 C pop -

. set 5

- H. B. POBINSON STEAM ELECTRIC PLANT ENVIRONMDiTAL MONITORING PROGRM 1979 ANNUAL REPORT I Prepared By:

C. W. Anderson - Water Chemistry Data and Temperature Data G. W. Bigelow - Phytoplankton P-oductivity W. T. Bryson - Preject Scientist J. J. Donaghy - Statistics D. D. Herlong - Benthos - Report Editor D. H. Schiller - Aquatic Vessetation W. H. Tarplee - Fisheriea August 1980 Reviewed and Approved By:

%.mPrincipal Scientist eAnau v L/ Principal Scientist ' $~

Biology Unit kialytical-Materials Unit

^

This report was prepared under my supervisior, and direction, and I accept the responsibility for its content.

if/ k ;&. 8 Manager, Environmentalfrechnology .

Section ,

~

I I

ACKNOWLEDGMElrIS Two individuals not directly involved in the preparation of this report were instrumental in the collection, identification, and -

processing of the many biological specimens required for the inves-tigation. They were Mr. E. Gerald McGowan and Mr. Ben Tobin. Data g processing and figure preparation were performed with the assistance of E Ms. Kay R. Conaway.

The authors appreciate the assistance of Carolina Power & Light's I

Analytical Chemistry Laboratory personnel who conductea water chemistry analyses and reviewed drafts of this report.

I I

E-I I

I i .i

TABLE OF CONTENTS I Page

" Vi List of Tables ............................................

List of Figures ........................................... ix

. Surnary................................................... xiv 1.0 Introduction ......................................... 1-1 2.0 Review of Prior Reports .............................. 2-1 1

, 3.0 Environmental Data ................................... 3-1 3.1 Introduction ......................................... 3-1 I 3.2 Wa te r '. emp era t ut a . . . . . . . . . . . . . . . . . . . ................ 3-1 3.2.1 Water Tempcrature Profiles ......................... 3-1 3.2 1.1 l ',e th o d s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3-1 I

3.2a.2 Results and Discussion ...........................

3.2.2 Continuous Temperature Recorders ... ............... 3-2 S.2.2.1 Machods .......................................... 3-2

3. 2.L 2 Results and Discussion ........................... 3-3 3.2:3 Littoral Zone Studies .............................. 3-4 3.2.3.1 Methods ......................................... 3-4 3.2.3.2 Resultr. and Discussion ........................... 3-4 3.3 Lissolved Oxygen ..................................... 3-5 3.3.1 Methods ............................................ 3-5 I 3.3.2 Results and Discussion ............................. 3-5 3.4 Water Chemistry ...................................... 3-6 3.4.1 Methods ............................................ 3-6 I i i

I Table of Contents (continued) fag

--, E d 3.4.2 Results and Discussion ............................. 3-6 3 Macronutrients ..................................... 3-7 Micronutrients ...............,..................... 3-7 Trace Metals ....................................... 3-7 Statistical Analyses ............................... 3-9 3.5 Literature Cited ..................................... 3-10 4.0 Fisheries ............................................ 4-1 4-1 I

4.1 Introduction .........................................

4.2 Fish Distributions in Robinson Impoundment ........... 4-1 4.2.1 Introduction ....................................... 4-1 4.2.2 Mechods ............................................ 4-1 4.2.3 Results and Discussion ............................. 4-2 -

Species Composition ............. .................. 4-2 Gill Netting ....................................... 4-3 Seining ............................................ 4-4 F.lectrofishing ..................................... 4-5 E

4.3 Standing Crop Estimates .............................. 4-8 '

4.3.1 Introduction ....................................... 4-8 4.3.2 Methods and Materials .............................. 4-8 4.3.3 Results and Discussion ............................. 4-8 4.4 Crowth Studies and Size Distribution of Robinson Impoundment Fishes ................................... 4-11 4.4.1 Introduction ....................................... 4-11 4.4.'2 Methods and Materials .............................. 4-11 4.4.3 Rasults and Discussion ....................... ..... 4-12 Bluegill ........................................... 4-12 Largemouth Bass .................................... 4-13 Warmouth ........................................... 4-13 Chain Pickerel ..................................... 4-14 j 1

11 l

I.

i Table of Contents (continued)

Page 4.5 Fish Reproduction in Robinson Impoundment ............... 4-14 4.5.1 Introduction .......................................... 4-14 4.5.2 Methods and Materials ................................. 4-14 4.5.3 Results and Discussion ................................ 4-15 Shoreline Areas Sampled With Larval Fish Traps ........ 4-15 Open-Water Areas Sampled With Ichthyoplankton Nets .... 4-18 4.6 Ichthyoplankton Entrainment ............................. 4-20 4-20

-I 4.6.1 Introduction ..........................................

4.o.4 Hethods and Materials ................................. 4-20 4.6.3 Results and Discussion ................................ 4-20 4.7 Fish Impingement at the H. B. Robinson Steam Electric Plant ................................................... 4-21 4-21 I

7.1 Introduction ..........................................

4.7.2 Methods and Materials ................................. 4-21 4.7.3 Results and Discussion ................................ 4-21 4.8 Habitat Managemnt ...................................... 4-22 4.9 Miscellaneous Observr.tions and Activities ............... 4-22 Deformed Bluegills ............................. . ..... 4-22 Fish Movement Studies .................................. 4-23 I 4.10 Discussion of Thermal Effects ..... .............. ... 4-24 4.11 Summary ................................................. 4-25 5.0 Phytoplankton Proo ctivity .............................. 5-1 5.1 Introduction ............................................ 5-1 5.2 Methods ................................................. 5-1

I Table of Contents (continued) t.- g 5-1 I

5.3 Resulta ......................................

5.4 Discussion ............................................. 5-2 5-4 I.

5.5 References .............................................

6.0 Benthos ................................................ 6-1 6.1 Introduction ..........................;................ 6-1 6.2 Methods ................................................ 6-1 f.2.1 Benthic Organisms .................................... 6-1 6.2.2 Emerging Insects ..................................... 6-2 6.3 Results and Discussicn ................................. 6-2 6.3.2 Robinson Impoundment ................................. 6-2 Dominant Organisms ................................... 6-2 Taxa Richness ........................................ 6-3 D1 varsity ............................................ 6-4 E

N,ntA. .............................................. 6-4 l

.. .a1 Trends ...................................... 6-5 6.3.2 Blac.. Creek .......................................... 6-6 6.4 Summary ........... .................................... 6-o 6.4.1 Robinson Impoundmeat ................................. 6-6 6.4.2 Black Creek .......................................... 6-7 I

6.5 References ............................................. 6-7 7.0 Aquatic Vegetation ...... .............................. 7-1 I

7.1 Introduction ........................................... 7-1 7.2 Methods ....................... ........................ 7-1 iv gl mm

I-Table of Contents (continued)

Page 7-2 7.3 Results and Discussion ................................

Sumary and Discus sion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3 7.4 7-6 7.5 References .............................................

I Appendix A - H. B. Robinson Water Temperature Profile Data, 1979 .................................... A-1 Appendix B - H. B. Robinson Dissolved Oxygen P ofile I Data, 1979 .................................... B-1 I

I I

I I.

I I

I .

I i

I LIST OF TABLES Table lage 2.1 1979 H. B. Robinson environmental monitoring program ............................................. 2-2 3.2.1 1979 H. B. Robinson continuous recorder water temperature dats., discharge ( C) .................... 3-11 3.2.2 1979 H. B. Robinson continuous recorder water 1:

temperature data, intake ( C) ....................... 3-13 5

3.2.3 Results of statistical tests of discharge water temperatures using daily means (Kolmorov-Smirnov two .

sample test) and monthly means (Duncan multiple range test) ......................................... 3-15 '

3.2.4 1979 Littoral zone ourvey: average, minimum and maximum teuperature ( C) ................... ........ 2-16 .

3.4.1 1979 H. B. Robinson water chemistry data ............ 3 -17. _

3.4.2 3979 H. B. Robinson water chemistry summary stra t.stics .g by station and death ................................. 3-26 3.4.3 1979 H. B. Robinson - Nitrogen: phosphorous ratios ... 3~0 3.4.4 Results of linear regression analyses of water chemistry data, .975 to 1979 ......................... 3-31 E

4.2.1 Coceen and acientific aames of fishan collec.ted from Robinson lupoundment 1974-1979 ....................... 4-31 4.2.2 Fishes collected with 100 ft. experimental gill nets from Robinson Impoundment during 1979 (numbcr oer 24-hour set from mean of two conaccutive sets per quarter) ............................................. 4-33 vi

LI List of Tables (cortinued)

Table Pm 4.2.3 Fishes collected by seining during Robinson Impoundment quarterly sampling during 1979 (number per haul) ........................ .................. 4-34 4.2.4 Fishes collected per hour of electrefishing from Robinson impoundment during 1979 .................... 4-35 5 4.2.5 Waller-Duncan K ratio t-test results for electro-fishing catch for each sampling quarter (all sampling locations combined) comparing catch among sampling years. Means are log catch per hour. Underlined

] values are not significantly different (95% CL) ..... 4-38 D

4.2.5 Waller-Duncan K ratio t-test results for electro-I fishing catch for each samplire years 1976-1979 combined) comparing catch among nuarter (sampling sampling location. Means are log catch per hour.

Underlined values are noc significantly different (95% CL) ............................................ 4-29 -

Weights of f1shes (grams) per nectare collected from

~

4.3.1 I coves of h.oinson Impoundnent during August 1974, 1975, 1977, 1978, and 1979 .......................... 4-40 4.3.2 Numbers of fishes per hectare collected from coves of Robinson Impowndment during August 1974, 1975, 1977, 1978, : .d 19 7 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41 k

4.3.3 Changes in standing crop ertimates for several fish species from 1977 to 1979 (cove rotenone samples in I Robinson imponndment) .................... .......... 4-42 1

l l

vii I- i

I List of i'alsles (continued)

Table Pm 4.5.1 Weekly catch per 24-hour set in plexiglass larval fish traps at Transcets A, E, F, and G at Robinson impoundment during 1979 ............................. 4-43 4.5.2 Ichthyoplankton density (No./1,000m ) in Robinson g Impoundment push net samples collected during 1979 .. 4-46 E 4.5.3 Least significant difference comparison of push net catch per 1,000m3 among transects sampled in Robinson Impoundment ................................ 4-47 4.6.1 Ichthyoplankton entrainment at the H. B Pobinson Unit 2 intake during 1979 (number /1,000m ) .......... 4-48 4.7.1 Fishes impinged on the H. B. Robinson Steam Electric Plant intake screens during 1979 (average number and weight (g) per 24-hours for each sampling period) ... 4 i.9 4.9.1 Percent of deformed bluegill collected by electro- -

E fishing from the transects sampled in .obinson Impoundment during 1979 ............................. 4-50 g g ,

5.3.1 Primary productivity and related data frora quarterly mmples in the Robinson Impoundment dur.ing 1979 . . . . . 5-5 6.3.1 Robinson benthic species list for transects and stations, 1979 ...................................... 6-8 6.3.2 Robinson benthic species densities in order of abundance, 1979 .......... .......................... 6-11 '

7.3.1 Macrophytes observed at. Rot inson Impoundment, 1979 .. 7-7 viii 5

W

t$*

SO O

$*th>o d' @

$+% v 43p IMAGE EVAL.U ATION \\\ <

9, Y/7 Y

</ [. )%"@ (g

$h' TEST TARGET (MT-3)

\\l!/ }

+ fffs +

1.0 it 2 UE y lj; E u U" i!!N I

l.8 i

l.25 1.4  ! 1.6 i_

4 150mm >

4 6" >

y;

h. , g%////

$ !Oxx

, ,pp 7

"--4 F"*- "O '

i LIST OF FICURES l Figure a Page  ;

1.1 H. B. Robinson Units i and 2 and Robinson impoundment ........................................ 1-3 3.2.1 H. B. Robinson water temperature profile sampling s',ations ........................................... 3-32 i

3.2.2 h. B. Robinson 2 C vertical isotherms (North to South), January and February 1979 .................. 3-33 3.2.3 H. B. Robinson 2 C vertical isotheres (North to South), March and April 1979 ....................... 3-34 I 3.2.4 H. B. Robinson 2 C vertical isotherms (North to South), May and June 1979 .......................... 3-35 L, I-3.2.5 H. B. Robinson 2 C vertical it.otherms (North to South), July and August 1979 ....................... 3-36 3.2.6 H. B. Robinson 2 C vertical isotherms (North to South), September and October 1979 ....... ......... 3-37 I 3.2.7 H. B. Robinson 2 C vertical isotherms (North to 3-38 South), November and December 1979 .. ..............

3.2.8a H. B. Robinson continuous recorder water temperature

~ data: mean daily discharge temperature 1975-1979 .. 3-39

~4.2.8b H. ~B. Robinson continuous recorder water temperature data: maximum daily discharge temperat.ure 1975-1979.. 3-40 j

3.2.9a H. B. Robinson continuous rec der water temperature data: mean daily spillway temperature, 1975-1978 and Unit 2 condenser inlet temperature 1979 ............. 3-41 I <

I I

List of Figures (continued)

Figure page 3.2.9b H. B. Robinson continuous recorder water temperature data: mr_ximum daily spillway temperature 1975-1978 5

E and Unit 2 condenser inlet temperature 1979 ........... 3-41 3.2.10 H. B. Robinson littoral '.one sampling stations ........ 3-42 I

4.2.1 Fisheries sampling stations in Robinson Impoundment.... 4-51 4.3.1 Numbers of total fishes collected per hectare frc.m coves of Robinson Impoundment in August 1974, 1975, 1977, 1978, and 1979 ...... ........................... 4-52 4.3.2 Numbers of bluegill collected par hectare from coves of Robinson impoundme-nt in August 1974, 1975, 1977, 1978, and 1979 ........................................ 4-53 4.3.3 Numbers of warmouth collected per hectare from coves g of Robinson impoundment in August 1974, 1975, 1977 W 1978, and 1979 ........................................ 4-54 , _

4.3.4 Numbers of largemouth bass collected per hectare from coves of Robinson impoundment in August 1974, 1975, 1977, 1978, and 1979 .................................. 4-55

- 4.4.1 Length frequency data for bluegill from station A-1 collected by rotenone sampling from Robinson Impound- g ment in 1977, 1978, and 1979 .......................... 4-56 E

, g 4.4.2 Length frequency data for bluegill from station E-1 g collected by rotenone sampling from Robinson Impound-ment in 1977, 1978, and 1979 .......................... 4-57 4.4.3 Length frequency data for bluegill from station G-1 collected by rotenone sampling from Robinson Impound-ment in 1977, 1978, and 1979 .......................... 4-58

• X E

I List of Figures (continued)

Figure M 5.2.1 Phytoa?ankton porductivity sampling atations at Robinwn Impoundnent ................................. 5-6 5.4.1 Primary productivity data from quarterly samples in the Robinson impoundment during 1975, 1978, and 1979 . 5-7 I 5.4.2 Chlorophyll a biomass data from quarterly samples in the Rob';ason Impoundment during 1975, 1978, and 1979 . 5-8 I

6.1.1 Benthos sampling stations at Robinson Impoundment .... 6-25 6.3.1 Total number of Robinson Impoundment benthic taxa collected from stations A-1, A-2. E-1, E-3, F-1, F-2, G-1, and G-2 during 1979 ............................. 6-26 I 6.3.2 Diversity estirates (d of Robinson impoundment I

benthic organisns collectsd at stations A-1, A-2, E-1, E-3, F-1,-F-2, C-1, and G-2 duricg 1979 .............. 6-27 6.3.3 Density of Robinson Impo ind aent benthic organisms at transeca ... E, F. and C (uring 1979 ................. 6-28 I 6.3.4 Density of Robinean Impoundant benthic organisms at stations A-1, A-2, E-l, E-3, F-1, F-2, G-1, and G-2 during 1979 .................................. 6-29 I 6.0.5 Density of Black Creek. benthic organisms at stations 11 , I , a nd K d u r in g 19 7 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-30 6.3.6 Diversity estimates (d) of Black Creek benthic organisms at stations 11, I, and K during 197 9 . . . . . . . . 6-31 6.3.7 Tot-1 number of Black Creek benthic taxa collected at stations 11, I and K during 1979 ................... 6-32 f

List of Figures (continued)

I Figure a ge

_P_a 7.3.1 1979 Robinson Impoundment aquatic vegetation sampling locations ............................................. 7-9 1979 Robinson Impoundment vegetational distributions I

7.3.2 (transect A-east) .................................... 7-10 7.3.3 1979 Robinson Impoundment vegetational distributions (transect A-west) ..................................... 7-11 7.3.4 1979 Rcbinson Impoundment vegetational distributions (transect B-east) ..................................... 7-12 7.3.5 19'i9 Robinson impoundment vegetational distributions I

(transect B-west) ..................................... 7-13 7.3.6 1979 Robinson Impoundment vegetational distributions (transect C-east) ..................................... 7-14 7.3.7 1979 Robinson Impoundment vegetational distributions (transect C-west) ..................................... 7-15 Et E

7.3.8 1979 Robinson Impoundment vegetational distributions (transect D-east) ..................................... 7-16 l' 7.3.9 1979 Robinson Impoundment vegetational distributions (transect D-west) ..................................... 7-17 l

1979 Robinson Impoundment vegetational distributions 7.3.10 l (transect DA-east) .................................... 7-18 7.3.11 1979 Robinson Impoundment vegetational distributions I

l (transect DA-vest) .................................... 7-19 7.3.12 1979 Robinson Impoundment vegetational distributiens (transect E-east) ..................................... 7-20 xil B

I I List of Figures (continued) i Ficure a

P,_afg 7.3.13 1979 Robinson Impoundment vegetar.ional distributions (transect E-west ................................... 7-21 7.3.14 1979 Robinson impoundment vegetational distributions (transect F-east) .................................. 7-22 1979 Robinson impoundment vegetational distributions I 7.3.15 (transect F-west) ..................................

7-23 7.3.16 1979 Robinson Impoundment vegetational distributions 7-24 (transect G-east) ..................................

I 7.3.17 1979 Robinson Impoundment vegetational distribution:

(transect G-west) ..................................

7-25 I

I I

E I

I I

xiii I .,

I

SUMMARY

Introduction The H. B. Robinson Steam Elcetric Plant is located 8 km (5 mi) west-I northwest of Hartsville, South Carolina in the Coastal Plain physi-graphic province. Topography of the region is characterized by rolling sandhills interspersed with water courses.

Plant cooling water is provided by the Robinson Impoundmcat, a 911-hectare (2250-acre) impoundment of Black Creek. The impoundment was formed in the late 1950's by construction of a 15-meter (50-foot) high earthen dam across Black Creek, a small swampy creek which originates in the vicinity of Pageland, South Carolina, 48.3 km (30 mi) northwest of the site. The drainage area of Black Creek above a U.S. Geological Survey station where US 1 crosses the creek above the impoundment is 27,972 ha (108 mi ). Tc,tal drainage area just below the impoundment is 44,807 ha (173 mi'). Water sources to the drainage also include numerous small creeks and groundwater under artesian pressure.

Physical Characteristics of Robinson Impoundment I

Water Temperature I

B Under normal operating conditions (Unit 1 power level fluctuating due to system demand; Unit 2 power level at or near 100 ;), thermal patterns indi- g cated by *.he 19/9 data were consistent with those observed during previous 5 years: Warmed discharge waters layered over substantially cooler bottom waters in the middle and upper impoundment areas so that there was a large volume of cooler water which was not thermally affected by plant discharge. As water flowed to the lower impoundment area, cooling occurred and waters were naturally mixed. Vertical temperature gradients were most noticeable during the summer months but were not as pronounced as in the upper and middle sections of the impoundment. However, the 1979 Unit 2 refueling outage (April 12 to July 22) was longer than g previous years' outages and, unlike previous years, occurred from midspring 5 to midsummer. Impoundment temperatures during this period were charac-terized by generally uniform temperatures that were significantly xiv 5

- - ^ - - - _ . _ _ _ _ - - _ - _ _ _ _ . - . _ __ _

I lower than temperatures recorded in previous years when Unit 2 had been on-line. Temperature profile data collected during this period would generally be representative of ambient conditions. It is therefore evident that ambient impoundment temperatures can exceed 25.0 C (77.0 F) in late spring, and approach 30.0 C (86.0 F) in midsummer as a result of solar input and the tendency of " blackwater" to absorb light energy.

Results of statistical tests comparing the daily mean discharge tempera-ture indicated that January, October, November, and December 1979 were significantly warmer than the same months in the majority of the other years tested. May, June, and July 1979 vert

• riificantly cooler than the same months in all other years tested, as was the combined period of I June to September 1979.

The rapid discharge temperature increase following Unit 2 coming back on line July 22, 1979, resulted in mean daily discharge tew eratures increasing from 30.7 C (87.3 F) to 40.3 C (104.5 F) u the twelve day period of July 23 to August 1, 1979. However, during this same period temperatures at the intake increased only 2.1 C (3.8 F), from 28.3 C to I 30.4 C (82.9 F to 86.7 F).

Water temperature monitoring recorded maximum therual conditions in 1979 during August when temperatures at Stat:on E-3 (immediate discharge area) were 41.6 C (106.9 F), and surface temperatures near the spillway were 33.2 C (91.8 F). Minimum thermal conditions existed in February 1979 when the discharge area temperatures were 20.7 C (69.3 F), and temperatures at the spillway were 10.4 C (50.7 F).

I Average temperatures and temperature ranges indicated warming thermal conditions during the period July 20 to August 3, 1979, especially in the middle impoundment ares (south of SC 346 to Transect D) where the average littoral zone temperature rose 8.0 C (14.4 F), from 28.2 C (32.8 F) to 36.2 C (97.2 F). Changes in temperature in other littoral areas of the impoundment were not as great due to the reduced thermal impact M the heated plu:ne, both above and below the middle impoundment.

Littoral zone temperatures in the upper impoundment area (north of SC 346) indicated that, while the thermal plume extended as far north as I Transect C, the average littoral zone temperature rise between July 20 xv I -

s

I and August 3, 1979, was caly 3.0 C, from 24.7 C (76.5 F) to 27.7 C (81.9 F).

In the lower impoundment area (south of Transect D) the average littoral zone temperature rose 3.6# C, f rom 27.7 C (81.9 F) to 31.3 C (88.3 F) .

Dissolved Oxygen In previous years, dissolued oxygen concentrations followed seasonal pat-I terns with generally uniform DO concentrations from surface to bottom between midfall and midspring. Dissolved oxygen concentrations below 4 mg/l at or near the bottom of the deeper impoundment stations often occurred during late spring, summer, and early fall, and temporary dissolved oxygen depletion occurred in summer at deeper stations (A2, g B2, and C3). W However, this pattern was not consistent throughout 1979 due to the effects of the outage and start-up schedule. The exception occurred in August 1979 when cxygen concentrations below 4.0 mg/l were recorded at substantially shallower depths than had been previously noted. This was most likely an effect of warmed discharge waters layering over already partially stratified cooler impoundment waters, and the establishment of a density gradient which prohibited mixing.

I Water Chemistry E

E The water chemistry characteristics ci the Robinson Impoundment and Black Creek are, for the most part, typical of coastal plains waters and are especially typical of the sandhills drainage. W~ters are soft, acidic, nutrient limiting, and generally limiting for biological productivity.

Water chemistry of incoming waters was for the most part, similar to out-flow waters. The notable exception was coppet concentration. Since the initial 316 Demonstration report, total and dissolved copper has been measured at icvels which were considered algastatic in other water systems.

As in previous years, 1979 copper concentrations were consistently found above the reporting Limit (0.018 mg/1) at Stations E3, A2, and H. Gen-erally, concentrations at Stations G were below the reporting limit, except during periods when physical conditions would have allowed discharge waters to flow northward. The remaining trace metals were not above their respective reporting limits with the exception of hexavalent chromium which was reported at Stations E3 (surface and bottom) during 1979.

xVi E

m

I j Phytoplankton Productivity Annual primary productivity in 1979 for A-2 was estimated to be 263.3 mgC/m'/ day, for E-3 to be 204.1 mgC/m'/ day, and for G to be 8.3 mgC/m'/ day.

I The estimated average for the impoundment as a whole would be 205 mgC/m / day based on quarterly sampling. This is three times as high as the estimate 9

of 67 mgC/m'/ day in 1978 based on monthly sampling. This is probably due to the low number of samples in 1979 and the deliberate selection of months to be sampled that would show high productivity. Also, the use of an incorrect efficiency factor helped to underestimate production rates in 1978. There was no statistically significant difference between 1979 and 1978, but the low sample size would ask all but the very largest differences. Another factor which must be looked at is the lower temperature in the summer of 1979 than in 1978 which probably caused less heat stress and physiological impairment of the algae in the

' men t . Temperatures at A-2 in June 1979 were 5 C and in September I im* ,

8 C lower than in 1978, while at E-3 in June were 9 C and in September were B C lower than the previous year.

comparison of 1979 annual production rates (205 mgCim / day) to 1975 rates (278 mgC/m / day) shows 1975 to be slightly higher. The rates in I

1975 were probably overestimated because of overestimation cf the avail-able l~ C f o r 14C measurements. Also in 1975, the winter months with the lowest production were not sampled; therefore, a further bias towrtds higher estimated annual production rates would result.

I Chlorophyll a_ peaked in fall and is similar in pattern to previous 1975 and 1978 data. 111ghest values usually occurred . fall (September) in all years except at Transect G while lowest values were in winter and spring (Dece:::bar and March) . Transect G has usually the lowest chloro-phyll a_ concentration in the three years also.

I overall, the estimated primary productivity was sitnilar to other lakes that can be found in the piedmont and coastal plain of North and South I Carolina and would be considered a typical dystrophic lake based on nutrient concentrations, color, pH, and productivity.

xvii I

I Aquatic Vegetation Thirty-seven species of aquatic macrophytes were mapped in or adjacent to Robinson Impoundment in 1979. This brings the total number of species

~

observed in or near the impoundment in 1979 to 54.

I Based on field sampling in 1979, the overall distribution of aqu.itic macrophytes, as well as the species composition, was not appreciably different from that of 1976 or 1978. There were some slight differences in the size, location, or composition of areas of macrophytes, but these differences were attributed to natural variation or changes in sampling methodology.

' Vegetation was sparse in the southern portion of the impoundment (south of SR 346) and increased significantly north of the highway causeway.

At all transects south of the causeway, only four or five species were observed growing in the water. At Transec.t F this value increased to 10, and at Transect G the number of species observed was nine. In addition, the density and percent cover of the escrophytes was signifi- g cantly greater at Transects F and G than at those south of the causeway.

• The primary factors influencing the distribution of the macrophytes in Robinson Impoundment appeared to be the depth of the water and the degree of protection from wave action. Water temperature appeared to be of less importance, and the least important factors were water quality and . substrate characteristics.

Benthos Benthic communities were similar to those previously recorded. Tran-sects F and G had higher diversity, number of taxa, and organism den- -

sities, while Transects A and E were lower in all three parameters most of the year. Exceptions to this were at Transect E during the Unit 2 outage. Density, taxa richness, and diversity increased durinh this period (April to July) at Station E-3 and to a lesser degree at xviii 8

a.

l I

Station E-1. After Unit 2 returned to service (late July), a reduction i

in these parameters was noted for Station E-3 and at E-1 (except diver-sity at E-1). Some recovery was seen during December for taxa richness and density. Taxa richness, diversity and density of organisms during 1979 were all significanity higher than 1975 and 1978.

Benthos communities at Station H reflected the increased erganic matter I from Robinson impoundment; but Station K showed a return to what would be considered a typical Black Creek benthic community as found at Station I.

The benthos at each Black Creek station appeared to remain the same as in 1978 with only slight seasonal dif ferences (not significant). All three stations were significantly different from each other for taxa richness, diversity and density of organisms.

I Fisheries Fisheries studies in 1979 were designed to continue the evaluation of fish populations in the H. B. Robinson impoundment. The results were compared to past years to aid in evaluating effects of the H. B. Robin-son Steam Electric Plant on the biota of the Robinson impoundment.

I In 1979 two taxas not previously reported were collected. These were the everglades pigmy sunfish and an unidentified pigmy sunfish. These I forms inhiuitat dense vegetation and probably were present in the past, though tit collected because of low susceptibility to the sampling gear employed. Several species reported in the past were not taken in 1979.

Most of these were collected sporadically in the past and their absence from the 1979 collections is not surprising. White catfish had previously been reported to be decreasing in the impoundment and were not collected in 1979.

I Gill net catch rates in 1979 were small and variable and generally were smaller than were recorded in 1978, when catches were similar to those in 1974 and 1975. Seasonally, catches were largest during fall and l5 x1x E

i I

smallest during the spring and summer. Fish diversity was highest at Transect G, followed by Transect F, and was generally greatest during the summer and fall. Compared to previous years, the yellow bullhead appcared to be increasing in most areas of the impoundment. 5 Seine catches in 1979 also were generally smaller than in past years, but again catches were variable. The previously observed patterns of largest catches and diversity at Transect G, followed by Transect F, followed by Transect A, and smallest at Transect E, were again observed.

As in the past years the much smaller catches at Transects E and A were g

probably influenced somewhat by a bottom configuration (drop-offs and "

snags) that hampered seining efforts.

Electrofishing samples collected from Robinson Impoundment indicated the I

greatest diversity at Transect G, followed by Transect F, with catches less diverse at Transect A and least diverse at Transect E. Largest collections of individual species during 1979 were bluegills taken at Stations A-1 and A-3 during January and Februat.. Other collections of note were the large numbers of golden shiners taken during September at Transect G and the small catches at Transect E during August and September.

It appects from a review of 1978 and previous years' data that bluegill abundance is decreasing. The failure to collect small individuals in appreciable numbers during September and October indicates another year an (as in 1978), with recruitment of young fish (particularly bluegill) to g the populations below levels observed in 1975-1977.

Electrofishing catch rates of bluegill, largemouth bass, chain pickerel, and warmouth also were compared statistically. Catch rates of bluegills in 1979 were lowest of the years tested in all quarters, except during winter 1976. Bluegill catches were largest during all seasons along the dam and intermediate in the discharge area (except during summer). This summer reduction in discharge area bluegill catches is probably an avoidance response to the thermal discharge. Largemouth bass catches were largest in the discharge area during fall and winter but lowest in the discharge area during spring and stamer. This too is probably an attractive and avoidance response to the thermal discharge. Chain

oc i

n.

I pickerel and warmouth (during all periodo) were most abundant in the upper impoundment. Total catch data over the year exhibited significant quarterly, transect, and yearly dif f erences. Catches were largest in winter, lower in spring and fall (no significant difference between them), and smallest in summer. Catches during all quarters combined I were largest at Transect A, smaller at Transect G, and smallest at Transect E. Considering years, catches ranked in decreasing order were I 1977, 1978, 1976, and 1979, with the 1979 catch significantly different from other years. Total catches were also tested statistically for each quarter sampled since there were appreciable interactions in the overall analysis. In all quarters (except spring 1977), the 1979 total catch was smallest of the 1976-1979 period. The ranking of catches during other years (and statistical differences) varied among quarters. The ranking of catches by transect considered on a quarterly basis was A-I largest , G-intermediate, and E--smallest, except during summer when G was larger than A (E remained smallest), and during vinter when Transect E was intermediate. Statistical differences within these comparisons did vary by quarter.

E Standing crop estimates in the four coves sampled durir.g 1979 ranged from 10.4 kg/ha to 122.9 kg/ha. Numbers of fishes also varied greatly ranging from 247 per ha to 36,735 per he. Comparing the 1979 biomass estimates to 1978 biomass estimates, values in 1979 were generally I- similar or larger except at the discharge (E-1) cove. Numbers, however, decreased in three of the four samplfng locations (A, E & G). The number of fish taken at the other ocation (Station G headwaters),

increased 99% over the number taken in 1978 due primarily to the large increase in numbers of golden shiners.

Standing crop data collected from 1974 to 1979 were compared for changea among years for each station. Species considered were warmouth, blue-gill, largemouth bass, and total catch. At Transect G differences among I years were not significant for the groups tested. At Transect E all four groups exhibited significant decreases in numbers over the period.

Warmouth numbers did not change apprec1 ably over the period at Transect A, xxi I

i

I and largemouth were taken in very low numbers. Bluegill and total catches at Transect A however, exhibited significant decreases. The pattern of decrease in bluegill numbers is of particular note since the data indicate increasingly strong declines in 1978 and 1979.

Overall, it appears that cove rotenone sampling indicates bluegill populations have declined in most areas of Robinson impoundment in recent years with the most severe decline in the mid and lower impound-ment areas. With this exception, the fish population in the upper impoundment and headwater arcas appears reasonable with the expected abundance and standing crop biomass of fishes and with year-to-year variations within the normally expected range. Although biomass esti-mates in the lower impoundment area are reasonable and higher than in some other areas and other yeacs, the decline in fish abundance is cause for concern. The shift in si=e distribution and the increase in predator and young fishes suggest reduced recruitment of young fishes to the population in the lower impoundment. The low numbers and biomass collected from the midimpoundment area indicates severe reuuctions in the fish populations and very little recruitment of young fish. The number of predatory fishes compared to the forage fish available also indicates a food supply stress on this segment of the population.

The discrepancy between the abundance of sunfishes in ichthyoplankton un sampling gear and the paucity of young bluegills in cove rotenone and g electrofishing samples suggests that bluegill are spawning successfully in the impoundment but that many of the young fish did not survive through the summer of 1979. This occurred even though water temperatures during the period Jurs to September v.a.e lower than the same period during g 1975-1978.

• The pattern of low, variable entrainment of percids during vinter and summer is similar to that observed in the past (1978). The absence of ichtyoplankton in the f all (1979) contrasts to the 1978 catch which exhibited a fall pulse. Another difference between 1979 and past years was that the density of June catches of percids during 1979 was several times higher than was previously recorded. The magnitude and temporal distribution of 1979 Lepomis entrainment was similar to that observed in the past. Comparing icthyoplankton entrainment to push net catch rates, entrainment rates were generally several times lower.

E xxii M

I I As in the past, numbers and weights of fishes impinged on the Unit 1 intake screens were very small, averaging 5 fish per day through cost of the year. The dominant species collected was bluegill, the most abun-dant taxa in that area of the impoundment.

I Unit 2 impingement rates were larger than Unit 1, but rates were low compared to impingement rates in previous years and to impoundment fish populations.

I As we reported for 1977 and 1978 collections, "def ormed" fish (primarily bluegill) were again collected from Robinson Impoundment. These fish appeared to have a depressed or indented operculum and in severe cases deformed gill arches. Another less common deformity involved the mouth and occurred in fish both with and without the deformed operculum. The mouth deformities ranged from slightly malformed mandibles to a reduced, twisted, immobile orifice.

The incidence of deformed bluegills in Robinson lmpoundment increased in I 1979. Several bluespotted sunfish and hybrid sunfish were also collected that exhibited the same type of deformity. The incidence of deformed fish collected by electrotishing was greatest in the midimpoundment area and lowest in catches f rot. the upper impoundment.

I The populations change of primary importance appears to be the f ailure of young fish (from the 1979 spawn) to be recruited to the population.

I This failure is evident in the length frequency distribution of blue-gills, the increase in bluegill average size (in cove rotenone samples),

the low numbers of bluegill in fall electrofishing samples and the reduced numbers of young of the year fish impinged on the plant intake screens while ichthyoplankton sampling exhibited little change. The continued occurrence of deformed sunfishes (primarily bluegill) is also of concern. The causes of these occurrences is unknown, but will con-rlaue to be investigated in 1980.

I xx m I

l

I 1.0 Introduction I The H. B. Robinson Steam Electric Plant is located 8 km (5 mi) west-northwest of Hartsville, South Carolina in the Coastal Plain physi- ,

grapnic province. Topography of the region is characterized by rolling sandhills interspersed with water courses.

I The site covers approximately 1922 ha (4750 ac) and consists of two electric generating units. Unit 1 is a 185 INe net fossil-fueled power plant that was placed in service in 1960. Unit 2 is a nuclear-fueled power plant which utilizes a pressurized-water reactor (PWR) rated at 2200 MWe, with a stretch level of 2300 MWt. Net capacity is 700 MWe and the design stretch is 730 MWe net. The Unit 2 Facility Operating License was issued by the U.S. Atomic Energy Cormission in 1970, and the Atomic Safety and Licensing Board of the U.S. Nuclear Regulatory amended the I operating license in 1979 to allow operation at 2300 FNt.

Power production of Unit 1 normally fluctuates due to system demand.

Normal operation of Unit 2 would oc considered to be at or near 1007.

power. However, fluctuation of power level may occur due to unscheduled repair outages which may last anywhere from several hours to several days. Prolonged outage periods of Unit 2 are normally associated with I refueling, which during 1979, occurred from April 12 to July 22, 1979.

Plant cooling water is provided by the Robinsen Im pundment, a 911-hectare (2250-acre) impoundment of Black Creek (Figure 1.1). The impound-ment was formed in the late 1950's by construction of a 15-meter (50-foot) high earthen dam across Black Creek, a small swampy creek which originates ,

in the vicinity of Pageland, South Carolina, 48.3 km (30 mi) northwest of the site. The drainage area of Black Creek above a U.S. Geological Survey station where US 1 crosses the creek above the impoundment is I 27,972 ha (108 mi ). Total drainage t.rea jurt below the impoundment is 44,807 ha (173 mi ) . Water sources to the drainage also include numerous i

small creeks and groundwater under artesian pressure.

l 1-1 I

i n

i l

The Robinson Impoundment dam crest is at 70.1 m (230 ft) MSL and the normal pool is at 67.1 m (220 f t) MSL. Outlet flows and impoundment g levels are controlled by tainter gates (at $7.1 m/220 ft MSL) and by E Howell Bunger valves at elevations 54.3 and 56.5 m (178 and 185.5 ft)

MSL. Impoundment water level fluctuates very little.

Average storage capacity is somewhat less than 3.83 x 10 m (31,000 ac-ft) and maximum depth is about 13 m (43 ft) at the dam. Average depth is approximately 4.3 m (14 ft). Luring the wet season (67.4 m/

221 ft MSL). the average residence time is about 37 days. During dry periods (67.1 m/220 f t MSL), the average residence time is about 131 days. Under normal operation, circulation of impoundment water through the plant coolin/, systems occurs approximately every 16 days.

The Robinson Impoundment is a blackwater impoundment with correspond-I ingly Mw pH and darkly stained waters. Waters are extremely soft, have Inw nutrient concentrations, and have inherently low productivity.

I I

I I

I I

I 1-2 I

I a

i g i o

"" %s I +

j -

a, f ,

7 E

e-I

+ ,o x +

(

c es "$

l' l

, e ) , n:

1

~,

DISCH4cc,5 ,

CANAL J f i Le Q:* ,,

~k f

i H B. Roginggy UMIT5 l gg.

d 2cu t -

o N w d -- 8 2 R, f'\, O'*M

' MILE 5 Zite U 8"'e 1.1 H. B. Robinson Unity I and 2 and Robhuon Impoundment.

1~3 E

I I-2.0 Review of Prior Reports I The Carolina Power & Light Company (CP&L) Environmental Technology Section began collecting data at H. B. Robinson in e.,rly 1973. Initial I- studies included thermal and water quality studies witn 11mited data collected on fisheries and plankton. In 1974 4. more intensive program was conducted, and in 1975 monitoring of benthos, terrestrial verte-brates, and aquatic vegetation was added. Results of these monitoring programs were submittea to the U.S. Environmental Protection Agency Region IV (EPA) as a 316 Demonstration report (CP&L 1976), and it was concluded that "a balanced indigenous population of (shellfish) fish and wildlife" was present in and on the Robinson impoundment.

I Following the successful 316 Demonstration, environmental monitoring at H. L. Robinson continued with various program modifications. Terres-trial vertebrate sampling was discontinued and sampling frequency for other studie.s was reduced and/or enanged. In 1979 results of environ-mental monitoring programs condr.cted since the submittal of the 316 Demonstration report and prior to December 31, 1978, were submitted to the South Carolina Department of Health and Environmental Control (SCDHEC) and to EPA (CP&L 1979), as required by the National Pollutant Discharge Elimination System (NPDES) Permit.

.I In 1979 H. B. Robinson environmental monitoring programs continued and are outlined in Table 2.1. Results of studies conducted in 1979 are included in this report.

I I

I I 2-1 I

' l

F.

I I'

Table 2.1 1979 H. B. Robinson environmental monitoring program.

I Program Frequency Location FigureReferenceE I

__ ,l Thermal Monitoring Littoral Zone Summer Entire Impoundment 3.2.10 Recorders Continuous Discharge and intake 3.2.1 Profiles Monthly A,B,C,CA,D.DA,E,F,G, 3.2.1 H,1,K Water Chemistry Jan.,Feb., Mar.,May, A2, E3, G, H, I 3.2.1 June,Aug., Sept.,Dec.

Chlorophyll Quarterly A,E,G 5.2.1 Productivity Quarterly A,E,G 5.2.1 Macroinvertebrates Ponar graba & Quarterly A,E,F,G, 6.2.1 artificial substrates H, I, K Emergence traps Mar., Oct.(bi-weekly) A,E F,G 6.2.1 Fish B Gill net 6 seine Quarterly A, E,F,G 4.2.1 E Electrofishing Quarterly, also Sept., Oct. A,E,F,G 4.2.1 g Rotenone Annually (August) A,E,G 4.2.1 g Larval fish traps, b m push nets Apr.- Aug.,(weekly) A,E,F,G 4.2.1 Nov., Feb.

Entrainment Apr.- Aug., (weekly) Unit 2 intake 4.2.1 Nov., Feb.

Impingement Throughout year - E based on historical Units 1 & 2 4.2.1 g catch rates 7.atake Aquatic Macrophytes SprMg, Ossue.r A,B,C,D DA,E,F,C 7.3.1 I

I l 5 2-2

a. .

I 3.0 Environmental Data 3.1 I

Introduction Water temperature, dissolved oxygen, and water chemistry studies have been conducted at the Robinson Impoundment since March 1973. Data for the period March 1973 through March 1976 are included in CP&L's "H. B.

Robinson Steam Electric Plant 316 Demonstration Volume II" (CP&L 1976).

Water temperature, dissolved oxygen, and water chemistry data collected between April 1976 and December 1978 are presented in "H. B. Robinson Steam Electric Plant 1976-1978 Environmental Monitoring Program Results Volume II" (CP&L 1979). Data for 1979 are presented and discussed in I this report.

3.2 Water Temperature 3.2.1 Water Temperature Profiles I 3.2.1.1 Methods Cenerally, unter temperature profile sampling methods, frequency, and I station locations were similar to those described for previous environ-mental monitoring programs (CP&L 1976 and 1979). Field surveys included monthly temperature sampling at various stations along established transecte (Figure 3.2.1). Temperatures were recorded for the surface and at 1 m (3.3 ft) intervals with a Hydrolab, Inc. TDO-2 meter. Sampling and calibration of equipment followed written procedures established by the CP&L Environmental Technology Section.

I 3.2.1.2 Results and Discussion I

i Water temperature profile data for 1979 are presented in Appendix A.

Estimates of representative vertical isotherm configurations south of the discharge for one day during each of the 12 months of 1979 are i included as Figures 3.2.2 through 3.2.7.

I Maximum thermal conditions during an impoundment survey were noted in August 1979, when temperatures at E3 (immediate discharge area) were 3-1 i

I

41.6 C (106.9 F), and surface temperatures near the spillway were 33.2 C (91.8 F). Minimum thermal conditione existed in February 1979 when the '

discharge area temperatures were 20.7 C (69.3 F), and temperatures at the spillway were 10.4 C (50.7 F) .

Under normal operating conditions (Unit 1 power level fluctuating due to system demand; Unit 2 power level at or near 100%), thermal patterns indicated by the 1979 data were consistent with those observed during previous years. Warmed discharge waters layered over substantially cooler bottom waters in the middle and upper impoundment areas so that there was a large volume of cooler water which was not thermally affected by plant discharge. As waters flowed to the lower impoundment areas, cooling occurred and waters were naturally mixed. Vertical temperature gradients were most noticeable during the summer months but were not as pronounced as in the upper and middle sections of the impoundment (CP&L 1976 and 1979).

However, the 1979 Unit 2 refueling outage (April 12 to July 22) was considerably longer than previous years' outages and, unlike previous years, occurred from midspring to midsummer. impoundment temperatures during this period were characterized by generally uniform temperatures that were significantly lower than temperatures recorded in previous years when Unit 2 had been on-line. Temperature profile data collected during this period would generally be representative of ambient conditions.

It is therefore evident that ambient impoundment temperatures can exceed 25.0 C (77.0 F) in late spring, and approach 30.0 C (86.0 F) in midsu=mer as a result of solar input and the tendency of " blackwater" to absorb light energy, 3.2.2 Continuous Temperature Recorders 3.2.2.1 Methods I

During 1979, continuous temperature recorders were maintained at the dis-charge canal weir and the Unit 2 condenser inlet. Equipment used for the study included an Atkins Technical, Inc., Model 22348-90 continuous strip- =

chart recorder at the discharge canal weir and a thermocouple at the Unit 2 condenser inlet. Inlet temperatures are representative of thermal condi-tions near the dam (depth approximately 5.5 m/18 ft) and while slightly cooler, are generally comparable to spillway temperatures reported in previous studies (1 m/3.3 ft).

3-2

l.

Statistical analyses were performed on discharge data for the years 1975 ,

through 1979. Analyses included comparison of temperature data by month, by year, and for the period of June to September. A Kolmogorov-Smirnov nonparametric test was used.

I 3.2.2.2 Results and Discussion Data for 1979 are presented in Tables 3.2.1 and 3.2.2 and Figures 3.2.8 and 3.2.9. Results of statistical analyses are indicated in Table 3.2.3.

The recorded daily maximum mean, maximum instantaneous, minimum daily mean and minimum instantaneous temperatures for the intake and discharge are indicated:

Maximum Minimum Minimum I

Maximum daily mean instantaneous daily mean Instantaneous intake 33.0 C(91.4 F) 33.5 C(92.3 F) 10.3 C(50.5 F) 10.0 C(50.0 F)

Aug. 7 and 9 Aug. 7 and 9 Feb. 19 and 20 Feb. 14,19 & 20 Sept. 4 Sept. 4 Discharge 42.2 C(108. F) 43.0 C(109.4 F) 14.2 C(57.6 F) 11.8 C(53.2 F)

Canal Weir Aug. 10 Aug. 9 and 10 Jan. 7 Feb. 6 and 7 I Results of statistical tests using the daily mean discharge temperature indicated that January, October, November, and December 1979 were signifi-cantly warmer than the majority of the other years tested. May, June and July 1979 were significantly cooler than all other years tested, as was the combined period of June to September 1979.

I Data also indicated-the effects of the cutags and the rapid discharge temperature increase following Unit 2 coming back on line on July 22, 1979.

Mean daily discharge temperatures increased from 30.7 C (87.3 F) to 40.3 C (104.5 F) in the twelve day period of July 21 to August 1, 1979. However, during this same period temperatures at the intake increased only 2.1 C 4 (3.8 F), f rom 28.3 C to 30.4 C (82.9 F to 86.7 F), and the maximum daily mean intake temperature for 1979 w e recorded on August 7 and 9, 1979 (33.0 C/91.4 F).

3-3 I

I 3.2.3 Littoral Zone Studies 3.2.3.1 Methods Followed the 1979 refueling outage of April 12 to July 22, 1979, data b

W were collected to document the thermal effects of start-up on littoral zone areas. Data were collected in a manner which indicated changing thermal conditions in the littoral zone during start-up periods.

Daily surveys were performed between July 20 and August 3,1979. An extra survey occurred on August 10, 1979. Temperatures were recorded from each of 51 stations at 0.5 m and 1.5 m depths (Figure 3.2.10). A Hydrolab TDO-2 meter was used, and calibration followed written proce-dures established by the CP&L Environmental Technology Section.

Daily surveys included sampling of vertical temperature profiles from the southernmost and northernmost edges of 30%, 70% and 100% power-level plumes whenever one could be defined. Daily surveys were not corcluded until the 100% power-level thermal plume recirculated to the intake area on August 3, 1979.

3.2.3.2 Results and Discussion S

Average temperatures and temperature ranges are presented in Table 3.2.4. E Data indicated warming thermal conditions, especially in the middle impound-ment area (south of SC 346 to Transect D) where the average littoral zone temperature rose 8.0 C (14.4 F), from 28.2 C (82.8 F) to 36.2 C (97.2 F), during the period July 20 to August 3, 1979. Changes in temperature in other littoral areas of the impoundment were not as great due to the reduced thermal impact of the heated plume, both above and below the middle impoundment. Littoral zone temperatures in the upper impoundment area (north of SC 346) indicated that, while the thermal plume extended ac far north as Transect G, the average littoral zone temperature rise between July 20 and August-3, 1979 was only 3.0 C, from 24.7 C (76.5 F) to 27.7 C (81.9 F). In the lower impoundment area (south of Transect D) the average littoral zone temperature rose 3.6 C, from 27.7 C (81.9 F) to 31.3 C (88.3 F).

3-4 g

i Data collected on August 10, 1979, after the conclusion of daily surveyr, I indicated continuing warming of littoral ene areas. The average littoral zone temperature was 32.9 C (91.2 C) for the whole impoundment.

3.3 Dissolved Oxygen I 3.3.1 Methods I During 1979 dissolvef oxygen c>ncentrations were recorded on the surface and at 1 m (3.3 ft) intervals at each of the deepest stations along I transects identified in Figure 3.2.1. Equipment used for all sampling was a Hydrolab TDO-2. Sampling and calibration of equipment followed written procedures established by the CP&L Environmental Technology Section.

I 3.3.2 Results and Discussion Diso lved oxygen data for tr.e period January 1979 to December 1979 are included as Appendix B.

In previous years dissolved oxygen concentrations followed seasonal patterns with generally uniform DO concentrations from surface to bottom between midfall and midspring. Dissolved oxygen concentrations below 4 mg/l at or near the bottom of the deeper impoundment stations often occurred during late spring, sucuwr, and early fall, and temporary dissolved oxygen depletion occurred in summer deeper stations (A2, B2, I and C3).

However, this pattern was not consistent throughcut 1979 due to the effects of the outage and start-up schedule. ~.he exception occurred in August 1979 when oxygen concentrations below 4 mg/l vore recorded at substantially shallower depths than had been previously noted. This was most likely an effect of warmed discharge waters layering over already I' partially stratified cooler impoundment waters, and the establishment of a density gradient which prohibited mLxing. The reduced mixing would prevent reoxygenation of the deeper water strata f rom the atmosphere and oxygen consumption through biological metabolism in the sediments would deplete the available dissolved oxygen. Most of this biological consurp-tion of oxygen was probably due to bacterial respiration (Wetzel 1975).

3-5

1 I;

l 3.4 Water Chemistry 3.4.1 Methods Water chemistry samples were collected quarterly in February, May, August, and December l~79 from the surface and bottom of three impound-ment stations (A-2 E-3, and G) and f rom Black Creek stations above the impoundment (I, surface) and below the impoundment (R, surface) (Figure 3.2.1). Additional samples were collected in January, March and June in conjunction with plankton studies (Section 5.0).

Samples were collected with a nonmetallic Van Dorn style alphs bottle sampler; transferred to labeled plastic containers; kept in a dark, cool area; and returned to the CP&L Analytical Chemistry Laboratory for analyses. Chemical analyses followed recognized methods and procedures (APHA 1976; ASTM 1976; EPA 1974 and 1979) . Reportir.g levels used in 1979 by the CP&L Analytical Laboratory are indicated .t the end of Table 3.4 Data collected in 1979 were subjected to statistical analyses by com-paring impoundment stations with Station I above the impoundment.

Nonparametric tests were used for chemical parameters when a majority of the data were below the reporting limit. Parametric tests were used for the remainder of the parameters. The significance level of 0.05 was W

used for all parameters tested. The 1979 data were also compared sta- g tistically with data collected between 1975 and 1979, using regression analyses to determine if changes were occurring over time. The signifi-cance level of 0.05 was used for all parameters tested.

3.4.2 Results and Discussion Results of water chemistry analysis are included in Table 3.4.2.

Summary statistics for Robinson Impoundment water chemistry are given in Table 3.4.2. The water chemistry characteristics of the Robinson Impound-ment and Black Creek are, for the most part, typical of coastal plains waters and are especially typical of the sandhills drainage. Waters are soft, acidic, nutrient limiting, and generally limiting for biological productivity.

3-6

I ytacronutrients Total phosphorous concentrations were luw, ranging from (0.01 mg/l to 0.06 mg/1. Concentrations of c.. solved phosphate and orthophosphate were never found above the reporting limit of 0.01 mg/1. Total Kjeldahl

-I nitrogen concentrations were moderate and ranged from below 0.02 mg/l to 0.72 mg/1, Nitrate nitrogen ranged from below 0.05 mg/l to 0.06 mg/l in the impoundment while measurements up to 0.10 mg/l were recorded in Black Creek above the impoundment. Ammonia nitrogen was usually below 0.02 mg/1, with higher measurements f ound occOssionally in winter and/or in bottom water. Average nitorgen: phosphorous ratios for each station are included in Table 3.4.3 and indicate conditions which are phosphorous limiting.

No seasonal pattern was seen in the nutrients, although some of the nutrients appeared to be higher in winter which is considered typical of many lakes (Hutchinson 1957). Due to the lack of stratification most of the year and the shallowness of the impoundment no differences in mean ,

concentration of nutrients were seen between surface and bottom water.

Micronutrients Waters are extremely soft and micronutrient concentrations extremely

~

low. The most abundant (impoundment) micronutrient was dissolved silica, followed by sulfate, sodium, calcium, iron, magnesium, aluminum, and manganese. Iron was reported above 1.0 mg/l on seven occasions, but was not significantly different from iron concentrations of ambient iron concentration in Black Creek above the impoundment. For other water systems, such levels may be considered excessive (EPA 1976).

I Trace Metals _

EPA's Quality Criteria for Water addressed the many problems associated with the definition of toxic chemical levels. The publication emphasized that specific toxic levels could not be defined unless local conditions were considered and evaluations included investigations of actual and projected land use, ambient concentrations, indigenous biota, ambient 3-7 4

I

I! l physical cond1+ as, and synergistic or antagonistic effects. It was concluded that a smical level which was toxic to one species in one particular water body was not necessarily toxic to all organiams in all water systems (EPA 1976). The state of South Carolina accepted such rationale, and presently applies specific standards on a case-by-case g basis. W Since the EPA publi. cation, numerous studies have been conducted to establish toxic levels of various chemicals - relative to specific water bodies and specific species. In recent' years, particular emphasis has been placed on trace metals. However, problems have developed with application of study findings, because " toxic levels" were often defined at levels below the analysis detection limits of recognized methods and procedures.

Hexavalient I

Two trace metals were reported above their reporting limits.

chromium was detected at Station E3 (surface and bottom) during January 1979. Since the initial 316 Demonstration report (CP&L 1976), total and dissolved copper concentrations have hen measured at levels which were considered algastatic in other water systems. As in previous years, 1979 copper concentrations were consistently reported above the reporting limit (0.018 mg/1) at Stationr E3, A2, and H. Generally, concentrations at Stations G were below the reporting limit, except during periods when ,

physicalconditionswouldhavealloweddischargewaterstoflownorthward,g An actual definition of a toxic level of copper is difficult to deter-mine, as only the free cupric ion is toxic (Sunda and Guillard 1976),

and analyses were performed on the total and dissolved components. The part of the total and dissolved elements which exist as free cuptic ions is dynamic and depends upon the interaction of a multitude of factors such as temperature, hardness, alkalinity, pH, organic acid, etc. More g recent EPA publications (EPA 1979a, 1979b, 1979c and 1979d) use a 3 relationship with hardness to determine toxic levels of cepper, nickel, lead and zinc. Because of the extremely low hardness at H. B. Robinson (averages below 10 mg/1), low concentrations of respective trace elements are defined as being toxic (at hardness = 10 mg/1); copper - <0.003 w.g/1, lead - <0.01 mg/1, ni:kel - 0.2 mg/l and zine - 0.05 mg/1. Because the l reportinglimitforlead(0.05mg/1)ishigherthandefinedtoxicconcentrg tions, it is impossible to determine if levels are above 0.01 mg/1. How- M l

l l

3-8 g

I I ever, it could be determined that :ine and nickel concentrations were not above 0.05 mg/l and 0.2 mg/l respectively, and copper concentrations consistently exceeded the 0.003 mg/l level.

Statistical Analysis k' hen corupared to Station I, total calcium showed significant increases i

at all stations. Totsi nodium showed increases at S ations G surface and bottom, E3 surface, A2 wurface, and H. Total and dissolved copper sigaificantly 1.nc eased at Stations E3 surf ace and bottom. A2 surf ace I 4,no bottom, and H surface. So significant differences of copper concen-trc..ons were noted at G surface or bottom. Chemicals showing statisti-I cal decreases when compared to Station 1 included chloride at A2 bottom; total suspended solids at E3 bottom and E3 surface; :ific conductance at G bottom; chloride at H surface; and total alumin. at E3 surface.

Many of these increases in the lower impoundment may be the result of concentration of ions due to increased evaporatiun of the varmer waters at Transects E and A. The increase in copper was probably due to leech-ing of copper from the condenser tubing in the plant.

s I

The linear regression _ .'vsis of data indicated a number of similar trends at all stations analysed (Table 3.4.4). These trends showed declines since 1975 in total solids, total volatile solids, tots 1 sus-pended solids, total dissolved solids, and total calcium. Other para-meters showing decreases at a majority of the stations included nitrate 2

(6 of 7 stations), and sodium (5 of 7 sta+. ions). The extremely low R values for all tests (most below 0.40) rer dered antilysis somewhat incon-clusive. However, if indeed the analysis vre indicative of change, I changes in water chemistry parameters over time appear, in most cases, to be a reflection of the drainage, since changes were found up - as well as downstream of the Robinson Impoundment. The majority of para-

.:eters which showed statistical change (e.g., solids, magnesium, calcium) could possibly reflect changing land use characteristice of the drainage.

Nitrate declined also, and combined with the decrease in solids, suggests I

that a change in agricultural activities or land use north of the impound-ment occurred, since large areas of land are used for farmland or managed o forests.

3-9 I

_ _A

I 3.5 Literatute Cited American Nblic Health Association (APRA). 1975. Standard methods for the examination of water and waste water. U.S. Covernment Trinting Office. Washington, D.C.

American Society for Testing and Materials (ASTM). 197s. Water part 31. I American Society for Testing and Materials. Philadelphia.

Carolina Power and Light Company. 1976. H. B. Robinson Steam Electric Plant 316 Demonstration.

1979. H. B. 'tobinson Steam Electric Plant 1976 - 78. Envirorcental monitoring pro; . a results, Volume 11.

Hutchinson, G. E. 1957. A treatise on l urslogy. 1. Geography, Physics, l and enemistry. Wiley and Sons, Inc. New York, 3015 pp. m Sunda, W. and R. R. L. Guillard. 1976. The relationship between cupric g ion activity and the toxicity of :opper to phytoplankton. Mar. Res. 34; g 411-529.

Tilly, L. J. 1973. Comparison productivity of low Carolina lakes.

Amer. Mid. Nat. 90; 356-365.

U.S. Environmental Protection Agency. 1974. Methodsforchemicalanalysis[

of water and wastes. U.S. Government Printing Office. Washington, D.C. 3 1976. Qaality criteria for water. EPA 440/9-76-023. Washaugton, D.C. pp256.

, Criteria and Standards Division, Office of E8 1979a. Cooper ambient water quall'y criteria.

~

Planning and Standards, Washingtcu, D. C. $

1979b. Nickel ambient water quality criteria. g Washington, D C. C-142. g Washingtor, D.C. C-Ill.

1979d. Zinc ambient water quality criteria.

Washington, D.C. C-70.

Wetzel, R. G. 1975. Limnology. Philadelphia, W. B. Saunders Co.

743 pp.

I I

3-10 I

a

1, 1 i,j i1 s1 '1' j]i;;ya,, ,i li)1[ i11ii4E i1l; j i1'1,;; !; i,1l4  ! ,;:i i ;1 1a1ill1

~ e m

- ~

. - ,s a

.a a, e ecci(ef*#*ecseeveE*ve9nevcr4d nautst4utt ddd td4 u u u u u u u *#u u c% u % a u u t w d E

a.

H, e%*.ee..erc.vvce,eP.e<,.2e.ce**(*..

.,e

• *

• a * - -

w t.t, r, t,E, < ,s, i. r. , e a. . e.. e' , 9, 44' n, .~..e..,n.4 t*

• l.t.e.

u.

H

. . e v c e ett*4 *l a**g % * *l(s c v ** v . C e c ** . , v c e 9* e* .e e ,* t # ec e v *e -e-e v w. r c r 6 (e a' t s . v.atu e ,. . t-.n u =?ltu d u e n ? Ehs ee un s o uunnttn t bdieeo e g

e uts e,' ot~sg , . ,?s. s. i. . . as,, e, e, u t*

ts ete4u v uu e e,e e, ** v c., *n.ul.e *,*

, e** c r

( -

3 w vse - * * *

• 5 ,.

o . . . % eIt** ***E, 4u 4u eseuevsv,-v e... v* .*e'~v.

e rtF *s6 c O f' Es v c d V 9 v.,,e'.vv*.eevev.vssv%eeevvtee.,c.v.e.v *s

)

e. a. nusEnnstl u#1 frdeuuEE e

.* s. *t6*tse e . t t.s, e. <. s, < ,es. ., a E.*e' 4 44'u s, e. e e,' s, ,

e.ee.1 9

e.

n 0 a i.  %

I 3 . .o.,se&.4eikieanse.oerE*ro# u% uau u4e tlls 4 s a

2 ei. #

C

• e .f &

• s 94 e s e e u snu u4 o. u un17eue..uteu issi 0fI a#

m n. 3 p m 4

y s M 1 -

p .

8 .

e .~

p 4

v.

c.u<..cvtW.e**...ec..*3 4

b tw.a u <. u ,. vee,g.v.n. . g,.neuuu.vee

• ****- - * +.

8 - ,. -

p .- a a a a' tdagrEcu .g g 6.'

ua4

• 8

- .s - * .*e*e**- .

• e e c. . v . c e ea'1]

uu4(tg. s.' ss* s u ,.e. .- .uuu - - -sgese6g,ie n.e ,c .e. , eu, .u. .. c,t .ce,c .

t. sg,.

a u.

2 . u.

n . .

ao vvru.e4AveEgge.<c.ec.gceewgv.eqef

• * * = a * - - - * . - . ** e

. e <. * -

4 ga 6# e e , .uenv. s ,e.a v,e u , e.eeuse .e.dFu. ee uc., eu e . e. ..,geg..

. eg r e.,.e, c u u u es u tt4. a g .e s - - * * = ** - - * * * - .

a g7sfaaaauu,sautajaaug7t p ,

g.s 4 e u4#gt as4 g' gn c 4 1 o g s 2

a .

vcveecg d * * * -

.e t 4. , e *e-v**- f e . a.

u .

. vaaweuE7agggEe rv e e v d t e . g e e r 4* ,* 44 .

aar. a. cer, u u.,uu up g* u#ud u *u* *

. n. p v , ,v. M *e

..- *ns* r,e c. u. v v. eee uuuagtguusg,u

. , e-g at s c c, ,,= , .o. . ge,.epgpv .

z . . . e

. D e u4#prJuua ,gg a n Q a  %

i. eoa 8

a 9=

2 s e 4 . e 4 I 4 s ,, u se ,e ..go . rapg u gp e ,, e u et 3l3e te e . iR(. se4e.u.,<anu 43t. o u u n ya ,, u ,.,p, . u g.,

a .n s

o 4 . g a i , al -

e 9 n m M a

a ,

p 2 .~

• o . 8 4

a ~

e r v c e a' t , .* , 9-4* t*dE'es , e . e. v . -*lse

- *e ** d - *e4c s4 0 e.,v.%e a n. sso . u iIn E#

1 3' c . . e v ,* . e v v. . e v e r -c *# *d -e v v #*

• • *e.* * -.- .

~-

. . - .* e

- 2 n <e I' # R d e u u u

• u u d e < H' u N u u e. " adt4uu.u<uaenu<ua44uuutauued4f 4

s u.

4 8

- i n . cceeveee,9e,eevvrv..ecdvcvve

• n

• 9 * . V F .* c e 9 e o c e , o. e c w o u . uuunaII'1mf7#2trouu.muuafsfu.n 3

f 4e1sae 4ul a 8

• u4t4astne.aneusae.cf9<c.e#v<*re.

. s** .

o*4 lfEa,e#ueuu4 s*

. ,e+

d n 4 ) t/ r 2dJ y

u cvvev 4s6*6fe.cav a vI*ees - *.

. t ruuuu58uf 4

3ve.gva .,.

~4 tgHnuaue.ec% eee

- **** - -n,ultes7aNrnu .ecv.#4c - *

• vtscnvte' C g*

o -

u .. .

ssB e 6

• c.s*4gu,22u 4

- + - -

o -

dtp

.n * ,t7g ouuuunaaudeeaa42aaaarat lp d

u.

a e Mi 4

u - ,ra,s*as6eaPa nua .o,funfeuean t3I e f . sw e ,?g.s,g

.s,,,,.uegg e g u.,, pn ( ,. u., gee.,glt

~

o d 0 ,,,,. t g s n.

i

- u s9 M

T q m I T

o e

- M s u' . . v . . e e

• 2 e ,* ..

• • ** ,* . v * . e- v- e e c ,* v v e n v* v v e*e' e-

~ e.4(e4 * # d e c ,* ,* v c c c e g

• c

• u. u<uo .ul.n74gtuuuunua/euuugauuU<s d4

,.,* ... g

<e

• 9g *

• ndt 4 / t J *d d u* e tsaeavncne<ea.v4 cu .*

o sia 4 u* a 4 a st u u u ,. gg u d** a

+

H 6 u. . u.

4 -

r eeev2f.9wefvvc

• • s f' s eceg* c v e v g , e c **

- e - C ,* n e **E'*E 9 v* (**esceere v**#*ecveeeeee99e 6 an innuu4te2tnuuuunnunJrugannneeef >

gn sttE u u% d s+ .e l u u tfIl n e a u e , u e u s ui f n %,. u % uJ <, z, r. u u %'

2 u I

I

+ ,. e v v v s * #**c ,* t 'e *d' , v<eecveveesee.ee(

a

- e - - * * *, vI* *f* * *e9 s ie.vev**Pl

• -- .a. nuuuuAt0, .,tdgEeunnnuuuuunugnu,setf

/pyde f gtJ r-

% b , v.

uEd,4 #4ue 6 s' v + or. u s u #I2tuuluuuu#2#u u *d n ae s de s ec n. + v e 9*

v. t 2v Z .

C u'

a .

- eaa,s9e,4eg#s nr e

= tg 4 s n u v a ,e ,. ru e sn 1 7 e go g s ,, uaeE t6t .- iE8* s44eee nue:s:.unlI'eusnSauea47ts6eee e

sd i S.

. a n a n

t wo y

n a

m v

n yadr4 .

,.s

,I

>>;:f !btt-(c,'+! yt)l)i8;, ',;i;,ji

I

~

.I 1 .....~..........=.~...............

I tatt*t*20 tit'Ett:CCCCCCittttt:1

~

1' . ..= . ~ ... . . . . ~ ....~ . ~ ..~ .................

.~..................

r . ~~~~ .,.tCC.s.~~~-~~ C C ~. ~ . C C ~~~ ~. . . C ; ~ ~~~.

3 ...,~.~.%......

t Ettttt*Citt:CitCCCCCCCCt*Ettt:C 4

-~.. .....-~.. ----------~~~~~.....-~..C~.....- .~~..

W "

s

.s 3 ....

. * ..... ~ . . . . . . ~ . ~ . ........... ~ . . . . . . . . ...... ....~.......

i :233:::::322::stitt::stt::::t; t.

3 E ....

-~- . . . ................. ...............~..~.....~.. .

. . ~~ 2... .--.~ =~~~ ....C~...Ctt ...~t -t~ ~. .

5 .r ..............

. ............. .. ..~. ,44..~.~...... . .....

gr 222:222 ::::: ttttt:2;tt%22:21 a.. -~........-~........-~..g~...g.

g ----------~~~~~ ~~ .

W "

s I

I1 .........

. . . . . . ~....

'3883Ktit*312XA*;$tt*CtKKC**: k

. . . . . = . ~ . . . .... . = . ~ . . . ..... ...=.=.

1 S .~.~.............~..

. ............ .... .......... ..~........ ..

o iCRKC*AAAAAA22

2*22222*AAA%;;;t

.e ...........................

. . . . . . . . . . . . . . . . . . . . . . . . ~ . , . , . ....

gy  ;$22CKAAAAAA*2**AAAAAKAAKAAR2*:

? .

-~..,.....-~..c.........g...,g-g o ----------~~~~% ~~~~

X s

I 9w I3-t **M**********

. -. . . ....... . . . . . s . i. ..,

i .+ .+.,* .. *. i. a.....K,KA*K

• i .i *. i t *

• i E

w  !.

u-3 . . .....

.......=.=.=.....~..~.....~.~.~.~...

W

. - . ... R ..... ... ....R. ......*.1

. . . ... . . , .. ~ $ $ $ $.~

v u

3 .a .~.........

• 2 r

Y 7;;*221*** 12 RRR2222 *$stsst*

N. 3 m -

o .

-~........-~.. .....-~ .......

---

~~~~~~~~~~.

s -

a

• e E F

11 3-12 EB

'\l I1l;!lII Ii D

e e e

. e e '

.. *. e 4ge a. .

• *

• aee4Ea eS4*stl4(

E .

e

-s

. e* e *g

• e Jggtd3

• g

,e I 8t7spysd#t,tagddpd e g

• e s c e, g*

• • l *e -e 4

&ed#sgfgg

• f=e *e g* e*(es pgf4gdsastfgf e*****

y* e*. t gtr*

g .

s w

n s.

.eeoe(g(eews4t1rFes%ltt1t6te9ttE ese* n* *e'* tt Es*

q ttdt4 sat s* * * * *f5.* * * * * *

• etts$s6t4ss<tts?t 1lt2f rE

. 4

=

se3*+g *eee e . e a

• gge* o* g* ,* 8* c u , e* i e *llttgIgi

• )* E/3

• g* eg *p *pee*g* v e,(* * * * * ,=

erg 4 et**g

• 4*eRoe*eeeoa* e *st s*es*

me((te4*43

• 4(q(8Ett

. o ,ttPpppt74,oplt4ipttsadt,1ttp1 esst fps 1 1i,

1. tip# e.

n 1

g e* ,* s' t Mgs# p Mi5tt******'f ggggh rt (ttsnueftt4 eeee1!It E e#Eeegg*%Ee.grbt *(*e$g*ee4*ete

• * *8tfp1 sE* a * * * * *

• * * * ** ** *t11tltl * * * *

.e e

• vpg* *+4g*e4(ep3i * * * * * *

• ecse*o8#e4* s4g e(4

.e & fE2fstd4t2,i,fafse4it44tftt,its td4D ttttd8f1 eeanttt *t(-ttE*4t tt te * -4tfi( * * * ** *Lt1***

• tE e

e.

A.

s. gdg t a4it tt* s t t < u u e I'It e u e' EatftT

.e ae E (

- o. e.

e

. *4 e%*e4eesr5e%e69 eeoiI5 4iu3ttt tlffP7fu#f#tt * %aeae se se t

n e

3 g#g ,6,aeeGEt(te%ed a,oeI Efit 8l e F6 o4eao*e8 stE#3f#tffEtf g

)

e as 3

m ,i t

E z a s 4 e

• a -- 4

=

u *

• g o

.*

• ef***d4

• • • • • 4 *d4*,* din

,*Fe*4eeAt*

• - * * * * * * * * * *

• fv.*9I8f* * * * *

• u

'

• 4ded8et4

% A' .' 4

• f* d9seZG

• ** 6a * ' e* e* t*

eevs*

• * * * ***t* ********e

• J*

4

!4ladd***8t3i48ttlt* il1dtt s e e e . e 4

• s' % e*t f

Ms**

tteE/2t74dauee****ess**

E c 4

4I46te4g 4

4 e ed4? d' rdfs4d##dJ4(

~

w . ' #* *

• 4o*4 eI4e9( *

• *2e4va8ed

• * * * * * * ** * *4eecsEo,ete*es** * * * * * *

• e S e' e' 4 4*ea*0 ** *

=

e *W e4*3** *

=-"4***d l8ofe44 4e

• e' % ** ** %

• e t.' % c.ae#7tfdtpredt v.-ee4

• e

• f 4* e e e g 3 g ea p .n c. *%8l90 l

• ee*4 *14t 8tf93etf449I:1Ittttil15tes8 5 e

4 1 75#!d?ttFPFRt#1#

• e* % e' ** e* % u* s

=

a E 2 n

.e

• 8'$de,*eeca8$F4

.*EIsE5tg**g*

+.<44ss45 dt8etttnlt5fta elt * ( * *(

• *****eee%4 e's 4 e s s e e e e 6 o s s

• * *

• s* *

• m w

e e*e*b4

1. 4pdldd#w+4

• *

• e*(#*94fC4vse#t(2(s3sgFg 4* g* #*ee.

l / , a a ods/2it47dd(

• e e s e' , o' % 4,*

a e.

- ltt,a88tt B e

m  % ** 4*.a4 **%**W6*4 c .e s s

2 - e a t e

l 4

d .e e iII9%94eeeae.

• 5%e4 oees#4* tti24/uua**t6 e1 t#ge.9aee4753 f744+4 Et,as4rt!fpwo.oed Gt,se4nE( o%

E s a

e

.s lin5E t8f #t/

• sr

t 5

1 fsfti a >

2 e R S

a e

• E i c

a "

2 a

m .

ie*l3'*4 I e e # e ' (% c v ***d* e* e* e* ** **e*f *e **

• n44tft s' 8'34'il1l1418#ee81l1 o d" (

• tttI8e8 s5l88 1tl18&3

• i-9*f *f

• E%

• e m

l a

4

• w6

• eC%**

v w' W' w teWwWWd*

• • • e4 ** * *

• e/*.<*****f f4

• * . - d* e4ewd4vtdw 6Vuw%b* * ** * *6 64*** **

w e

p f 2  %

o ,4

-

• e e

• 9* v- p*e*g*J*. v e s e* **e* **s*4 C ** 8 1g 1 e e'e e e'a't t f e a'e e e e l* af* c6 ** fE (* *I s 9" C ** ** ** 5"B* ****1**f* * * ** r* e +* ***s*# **

• 6 *w *(e* v i e e' *t o * *

• a an nfl$t4g6gtistittt5t8tllti1tI

,f 1

1. f

• *

• w*

1. sV2d#W7 h*f * * * . < ******g%

%*e*W7J#s<o##d#fds#u =

H 2

I s

n . . e8tga3 * *

• 4 ,1 e *** .* r* e e *g *e *s **'8* (w*Fae(gd e n

e g 6ggg *

• e#,seE * +e(, * +e o E * * * * * * *

- .e 81 E8sl

• gl' g s e e, s IlEtEew*$8 d.,JtII e*J 7 r. a*#% #e#%f t,p*  %*** * * *

• w* .%, % % w* *V* ** 8

• o e.

. tl;gf gtr tIettttf884 d pt *

e. d

1. # 4 # a r en#**#**# **

4*** u s % .* s* .*

ts/ts

(

n .e *

• u .

1 p t.. ,

,Ff

• 6e4eaei,ei+4e4eeeIJffPfut28 ll t83t1ll fE* e4 #

Ngg e

3 #s* . *aentitf(t$fft,nt#r/pfp/sgJt i

o%e,ae*t 7( *gea =e u .u i E o s

e m

s e

1 1

u o

s .

• u

• T .~

• 9 . A*

• d* #* e* e e. ,* l g (,ve*t2e(

o 0 * *oeg*

1

• g4d ,*e44a

• w e ** f eC ** o %* 4* g e d e* E* * * * * * - -

81*

d

.34ta**

• • * *t * , e' 6+ $.* * * * * * * * * * * - * *3gg*

tgl8 $ sspgdtt64gdtgulg tttttt1gstt3 lgfentt t.

tltd,* E d d E' d t $ &

• e#c.esee(Eeeee ttpdgdt?Jfd4tt4d:nad2f4dgttJtgp *% (,6* %* w** ****,***** g* t s s t a (

e

• H e E e .

e4 *

• *

• e* % * *e *g*4*E+ +* . r ***F*ga*gg( * *

• gegtt *6*

2 g* s do E'at l* * * * *Ee me ** e%k*t8EF*9*%84(*<eo*(

e4,e*2e1eE H

• . .n slt(ttglf#,ef7l1

.lt5tegl51i,35t81I tI%3tttt.lgBgtti lgtit 4

• i tl7tfal'#EI tlttI * * * * * * * * * /t!t * *

• l# ElFt f f

• 2

• *G44gg(iEgf n n f 2 ## 8f t 7 rl 2 f

, efd

,*4*geg *S** *g *, e* e* g* e* e* e* g* 4. ea c t g g.*,+g,. efge4E* (%424ee9$ed *

• * * ** t*# *2 d* #*l *E H e.*ed*fe*g**g7g.*

e w 1* ** ttddd

• *

• e * * - * * * * * - * * * *

• Z * * * * *

, .l 4t1e,6tgnn12d3t4g2gagggit 3s8tg5et gt8g8gsggglBgtsgl

• * * * *gttrg 1

e n 7#'ttsftHI%#d/E ..***tE4d(

ia272tE2edgFa2 g(L(

E Z E'

e.

e c ,

1 s iEf,%egeeesis titEgoge4 oeegpgos eoeo e 'E* g42eae4i5 9%eaeeef 4E *g eee3 tt8g tyi2tg,Qggpfqg *

• g I

t9t35Ett ntdf22Mg/tttq4 a %e,

• 4I M

• E 1 E m

)

D 4

s E

r I44

• • r e

E

l!

,I f[

W b

3 e

e m

o N

M m

R 3

4 9

s1 t

r 5 i.

. m e 4e9e4994ie444%4&tEee*%e6 464#A, t

= sesa.,94edd9*6e#s*b%%4*el essti859ltt8t5l8tI8tt0f 49d4d +.

t5iti 4

s,s%e%2e44* *#4d48* *E*e(t f*fd * *

. e - * * * * * * * * * ** * * * * * * * * * * * * ***

u o i es ,,'.49td

• 9 t 9

• A'ttS%55%SSt S4d99.i etseie8tt38l8IIttt8388t 45t?8

,e a

rsns.o94#e49*el

• As9%*6d 9 * * * * * * *4a44%,

.*e' a' s . e' e

• J

• t 9 t a e' 4 9' e' 4 h % 4" 5 4 4*494",,

m

w. annein3EIlt0tll86t9tfI31 4t880

.B o

, nrs.4,g eeei7i*E*ieeeEff

• 44a*be, lt8tElElttltffF2FlElt( m M >

e i

is.

m

, . ,(s94g**e(*d*sgee*geee*/edd* e

o. g * * * * * * * * * * * * * **

g ,ssristtt*E3tt**a

• a * * , *e'

• seeesets *

• s I*'e tees

, aea,tgdttgtetqgstgst2tttddttt M

r,.,s(64ett*d ** *eE*EIsIe*494

. me .* * * * * * * * * * * * **4 * * * * * * * -

• u g r u e , e'r2."r44ttttngttttf8tJtt2l afrli 1 Ee64t s e' e e' e

• g s 6 e 6' e' s's a 6 e' st a

• s 4

• r > F t e f(s e % e 4 4 e y 4 4 d dg *e4(4

• * * * * * * * * * * * ' 6 s e' e e e e e y 6 e' e s e s e t ssst M

21lIle 0

eeea,ea3

. s72ftftf4tttt1t#2. l#t ' tdt s

e g

, sri,5,g e698#E*%eaeeas#g 4%o4 h64 881llIltltft2p4#f2e76 M

.i w

i e

i.

M m

=

.gg a  %,ees(A4E9*2**9*e4*49W6**#**98(

stas 9,g4%4****6 * * * * * * * * * * * * ** *-

• 4 % S 4 4"

• 4 b 4

• E 9' 4

w eeee4a22d4EfE(2Ptd2J44E4dJEt24, M

. a c aassea*e*9e4d*

• - * * - - * * * ' * ** *fE(*9((ee%e*W*((.*

sc.,5%g4**E(EK(t * ** ** ** **** * **** ***((fE

e. t erir1r22ldE2Ji2t22t/f2224fE2fE *E

,. E q

oese.e%2eAI*1AE(%ee44a43td B**ei *

• M

1. t 2 l,.'

s , , s ,. ,eb2bd 42 *2*fEt *ft(

izea * *%**4*E4**t(E 2 f l E f / d 2 f 2 f l 4 f

u. u a.: ,4

-e(*%.4e6eIE(

• 49aa61I2(

. o lllIt18tt12 f 2 2 *%9d468 J # 2 i 2 2 4,3 4

w i

+ M 4

~

(

p a

c=v i s.(%

nens e%I%eeD*e4ete&et44 a,ee,g*

.I l' 8'e't*** seas

• stb 6d , 4sggd ssns n sEtCtiddttddtfttEE2g2tggd u

• w M

p 4

e.

<*(. ((eeEe(*(9(9e%gf*t94ggegd m - * * - * * * * * * * * * * * * * * * * * * * * *

• u e e : t t 4 e e e e' t" a' e 6 e e S d 9g44,g9 c ni o ei<1 rss4 (((Jd22f ~l2l22#22i222g4d7 a

)

c m ss4e izes

%e*(%*%t%*%ese%4%FE(4wggl s9I D* t*t e e' w > e e e' s e e u w 4 , s g" , g* A' M

• D e fasi t(EE2idfl7tl?t2il223t2g2l z =

=

c i s t

a i a

• e s

sa(,%9ae6 GEE 6*%9Jeee11(9%e4ege Etl1II8Isll24222d74yt M t

< >=

e w l

• M C **

1I#?

M 8

0 I i ijj1l'i,i;ijjlli l

W.

f M M M M M M M M M M M M M M. .

Table 3.2.3 P.esults of statistical tests of discharge water temperatures using daily means (Kolmorov-Smirnov two sam;ile test) and monthly means (Duncan tuultiple range test).

I l

fionths 6 to 9 Year 8 9 to 11 12 Coimbined i 2 3 4 5 6 7 gi paria.m 79<75 79<75 79<75 79175* 19275 19<75 fM Data Availal le f or Test 19475 79<75 79-75 79<76 79>76 79-76 79276 79>76 79,76 79 76 79276 79<76 79</6 79<16 19<76 79<76 79-76 79<77* 79>77 7917i 79>77 79>17 79277 79<77 79>77 79177

~

79<17 79<T7 79<77 79<17 79-77 79>78 # 79>78 79<78 79>78 79<78 19>18 79178 79>. ' 79+78 7?<73 79<78 79<)d*

79-78 79>7B 78<75 78-75 78<15 78>75* 78 15 78<15 W Data Avaital,'e for Te a 78-75* 78<75*

78-75 78>76 78,76 78>76 78>75 16>76 785;6 78<76 78=76 78>76 78-16 78>76 La 7b-76 78<76 78<?6^ 18>71 78>77 78>77 78177 78>77 76>77 78<77 78<77 78<77 18>77 78<77*

L 18-77 18=77 78<77 tu Data Available for Test 77-75 77>75* 77475 77<75 77<F5 77>75* 17>75 77<75 77-75 77<16 77<76 77<76 77>76 77276 77<76 77<76 77<?6 77-76 77>76 77776 77>76 77>76*

77-76 76<75 76<75 16<75 76<75* 76<75 76<15 No Data Available for Test 16<75 76<75 76-75

• Large proportion of data missing for one year which may or may not bias result.

78,77 77,75,76 75 75,76,79,7J 75,79 78,79 79,78 75.78 Yearly 79,76 76 76,77 76,77 77 77,75 77 78,76,77 77,75 78,79 77 78 ranks of ,79 79 79 76,78 75,76,78 75 79 76,77, 76 7 7, T.# 3 '7 78 78 79 75,76 79 76 high to 76 76 77 17 78 79 low temperatures s - &ndicates l es s tlsa n

> - Inlicat es grea ter t han

- 1.J1 cates equal to inserted for those days in June

+ - Estimatem calculated f rom linear regression of weir data as a f unction of plant data were through Septeel,er 1975 for which no velr temperature data was available.

< -.___-_ - s

{

i I

l l i

t t

[

I I

Table 3.2.4 1979 littoral zone survey: average, ninimum and maximum temperature ( C).

Lower Impoundment Middle Impoundment  !

! Upper Icipoundment Total Impoundment '

Ave. (min./ max.) Ave. (min./ max.) Ave. (min./ max.) Ave. (min./ max.)

July 20, 1979 27.7 (27.1 /28. 5") 28.2"(24.5 /28.7 ) 24.7"(22.0 /27.4 ) 27.6 (22.0 /28.7 ) l July 21, 1979 27.9 (27.5 /29.0 ) 28.9 (22.5 /29.5") 25.5 (23.0 /28.4 ) 27.9 (22.5 /29.5 )

July 22, 1979 28.1 (27.4 /30.5 ) 29.3 (21.9"/32.0 ) 26.0 (23.0 /28.3 ) 27.8 (21.9 /32.0 )  !

July 23, 1979 28.2 (27.7 /29.5 ) 30.9"(22.5 /32.6 ) 26.4"(22.6 /29.1 ) 28.0 (22.5"/32.6 )

l July 24, 1979 28.2 (27.6 /30.3 ) 30.4 (22.5 /32.0 ) 24.1 (21.4 /27.7 ) 27.8 (21.4 /32.0 )  !

u

! July 25, 1979

~ 27.8 (27.5 /30.4 ) 30.6 (23.4 /33.0 ) 23.3 (22.9 /28.0 ) 27.6 (22.9 /33.0 )

h Ju1y 26, 1979 27.9 (27.5 /31.7 ) 32.1 (23.3 /34.0 ) 23.'"(23.0 /29.5 ) 27.8 (23.0"/34.0")

July 27, 1979 28.3 (27.5 /32.4 ) 32.3 (24.0 /34.3 ) 24.[ (23.4 /29.8 ) 27.9 (23.4 /34.3 ) l l July 28, 1979 29.9 (29.1 /34.0 ) 33.8 (26.0 /37.0 ) 24.8 (23.4 /32.5 ) 29.7 (23.4 /37.0 )

l July 29, 1979 30.4 (28.0 /34.4 ) 34.4 (24.5 /36.6 ) 26.4 (24.2 /32.0 ) 30.3 (24.2 /36.6 ) i

! July 30, 1979 29.7 (27.5 /34.7 ) 32.9 (24.2 /38.0 ) 26.1 (24.1 /31.6 ) 29.5 (24.1 /38.0 )  :

i July 31, 1979 30.6 (29.4 /35.5 ) 36.0 (24.2 /38.S ) 26.5 (23.5 /32.0*) 30.4 (23.5 /38.5 )

! August 1, 1979 30.9 (28.9 /36.6 ) 36.0 (25.0 /38.5 ) 29.6 (24.6 /34.6 ) 30.5" August 2, 1979 30.9 (29.7 /37.1 ) 36.9 (24.8"/39.3 ) 28.1 (24.0 /33.2 ) 30.6"(24.6 /38.5) )

(24.0 /39.3 I

! August 3, 1979 31.3 (30.1"/36.6 ) 36.2 (29.4 /38.9 ) 27.7 (24.1 /33.8 ) 31.0 (24.1"/38.9 )

i August 10, 1979 32.9 (31.8 /38.2 ) 37.9 (26.2 /40.9 ) 31.8 (25.0 /36.0 ) 32.9 (25.0 /40.9 )

l r  !

i  !

i i s

I i

i e m m m m m m m e m m m m M -

m m i .

l

e 1

4 4

l t

6 6

4 One IN K

• e e e e e e e i

e 4 wCE@Ca wc 4meeseen cm@ 12 m e e o e e e e e mNNomool I

4 6

m em 4 cm@ Ov 3 amohrese i mNmNm===

4 m4N@@om4 00000000

$ wC@CamC@ 4@S@@tth e e e e e e e e e

cocoocoo 4 4 t e km@NNN4 4 I

8 t w@@CdmC@ m mammmmm.

^t e o e e e e e e U t a e =>@3dmC@ mo%@e4N4 :J = @ 14 s secocono 4 1 4N@mm4AN l e i 4 i mm =

w I =Ow IN 2 e e e e e e e a w n medoech@

Q 0 wdOJmC@ mzmo4@~4 e m m ==== ehem$mme

@@Po@@CN 7e 8 I wQw 12 4 e e e e e e e o y 8 4@@ech@m mmmN=mNm

$ O@mamY4 e e e e e e e e a e @4*#N44@ mmmmmmmm g i t

oooooooo 6 wCO24 C@ e e e e e e e e wow l@ w e e e e e e e e 4

oooooooo t t t t t 0 $ 8

], >OmeA&Q@ o e e e e e e e I

e 4 I wCw 12 m

• e

• e e e o e a i mmmmmmmm L 1 aooooooo e e e * *

• e e M i =C2w120@ e

• e e ***e >Qw 11 2 y I oo000000

' ' ' ' ' ' ' ' ommemm40 I m e

C e

a g

E 4

a wCw 14:0@

=======.

00000000

• e e o e e e e oooooooo wow (t o pow 1A2

@@@@44@h e e . . e e e e o0000000 e * *

• e e e e

, f f ee t t t t 1 I > I w

2 ======== >4#34e>4 UCE ' t t 0 t t t t NNNammm A waw ts u e e e e e e e e A = mooooooo A n e4Nemeth V E >OW e e e o e e e e I f 4

5 3

I Z*=m24wW mNNeN>mt

@ Je @ @ @ @ @ @

00000o0e e e e e e o e e wC* IV : Ne>@et@c endemmmm.

ocococco e e e o e e e e 00000000 4 8 0 9 ooooooon I

D e et 0 4 4 4 4

• .h@o@ D@@ >>

> 5 Nkwn44e>

b 3 wC* lZ Nte4NNh# wCm (W 4 e e *

• e e e e w A MNm4 cnem ooooonco M Z e e e e e e e e

• C oooooooo mNaNeemm I

5 m I e e e e e e e a

$ = wow in a m0000000 4 4 y s 41132m4 NNNNNNNN C 000oo000 e e o e e e e e mmommmmm g, w oooooooo g oooooooo oo000000 a t I t 4 0 e

>Cw 1Z @ e e e o e e e e q l a0000000 g i g mf?N*Nh@ t t i I $ 4 4 8 g 24%32wd@ = ====

0 @@@@@@@@

• 1 0 fo@@CC4o ocucomoo e o e o e e e e Q24 I

C e e e o e e e o 0

43EC3v> om?omomo ococoaos 4 9 Nm*NNNNN 4 4 4 eie O 1 M i m=======

e mAdemNem oo00000o

. 4 WZJOZm3w e e e e e e e e m3h 44 @ e * *

• e o e

• A NNNNNNNm I

t 1

i cococeso

. 4 8 4 e e t t t t

= t @e>@tJ@@

t e o e e o e e e I wOm 14 J E secocoes mer agw@ e e e e e e e e m i s e e i e

%@m=4*to

$ a momm@eme w ztecww e e e e e e e e mamammmN I~ ,

6 t

4 sem lA e e e e e e o e f@@@44@4 cmomem 4N

• 4 4 0 mmmmmmmm @DJs enw e o e e e e o e

• I C4 l@ 4 K NNNNNNNN mNamNm4m M i t

a G

e t

=wsnt e q w f. wco c_o x ~* sws-r w c::a e ,E w Q312 4 8 D#e+2@@@ x@@@@@@@

4 8 b ' NN*m t NNmm 444aC@Em twd*mCC 4 MwW3@gm PenwmOZ t

i e

t 4

4

- )*N

i I'

I e @@@@@D@@

6 400400o0 e =m@ (N g e e e e e e e e '

e cocoonso 4 0 8 0 0 4 4 4 ,

@@@@@@@O I

0o000o00 cm@ 12 m e e e e e e

e 9 e 4

8 3 0 o. o. o. 0 4 C=@ 1U 3 +mheat?*

J NNNN====

e o00o0000 e

o e e e e e e e o0000000 e

a ceAe#4te m332=Co> e e e e e o e e 6- ======== =wommmmm onS 14 J e o e e o e e e Ahommmm@ 00000e90

@3ystew e e e e e e e e MMfMNNdN l wow lH E e e e e e e e e e e=@cm=@N wCt#Cdmo es'e@<e*>

?@v4@oeo@

t

• C @ O 4 m C y2 NNttm4@m eenace@@

s , choo?ose mow 12 4

• e e e e o e

• mm ~ mmNNmem-l w@@aa-CP <><<<e>< ==mmmmmm w>@@amCS 7 e a m @ 'J o e oooooooo eNNordCm *Cm l@ w e **** e e *

~~~ ~ oooooooo 6 e e ea a ee OfONme*h

>@DJmDS e&#NmmoN

• • mmmmmm t@@@@@e@

t 6

$ @ooomN@d now 42 = o,oe 0e 0e 0e 0e 0o 0e S@msave e e e e e e e e oo000000

@ @@@df444 4 4 0 4 0 4 4 0 a mmmmmmmm K oooooooo @@@@bb@f a wQQ2s20@

• e e e e e e e ocoooooo 0000000o wCp lX 2 e e e *

• e *

• i

@1 i e eea 4 4 e o0000000 2 0 4 4 4 4 0 4 8

> m m m m m m ee m osu e o t'e o o 13=.9trc@ * *

• e e e e e ome@@@em 00000000 @epe**##

N t i l 8 I e t I mCe iT @ e e e o e e

• a ocoooooo t emmanummm na e st a -J o o a o

@ WQ5WLZC# e 9 e 6 e o e e @@@@@@@@

l oooooooo conooooo

• *

• e e * *

• C 4 4 0 4 I e t 4 >Qw lE 3 E 00000000 mm==mmmm e 4 4 ee e e e oooooooc w3w 1420@ e e e e e e e e

= oooooooo .N>moemo@

C t 0 t i l 8 0 4 MNmmNNaN 2 > C o- IW w a

• e e ****

n UCC mmanNme7 oooooooo E NNNNMN O =

m wCw (W 3 emNace=C w MOV NNNNm@me mmeo==Mm q e e o e e e e o00000o0 y m h o f d t9 @ m a e e e e e e e C == 000o000o

@ b @ Dsit e @ K l oooooooo m = m e o @e c e 4 Emp34ww e e e e e e o e 4 0000000o D 3 e e 4 45 C @

t t I e i I wCp lW W e * * * * * *

• 4 GoooooSo 8 o@m###h e e mNNNanNm 4 wCm 12 e * * *

• e e e NNNNNNMN 4 0o00000o wCp l( J e e e o e e e a 0000000o j NNNNNNNN 1 ococcoon mmmmmmmm g gggggmd e e e e e e o e 6 wooooooo oonsoaos

,% 8 e 4 8 8 4 I t OooooGoo y a *C* 4: 3 e e e o e

• e

• y a emommNmC 0000000o g i TC&CZW@@ m m m N = m N .W 9 4 I e l 0 0 1 E S@@oo@of e e e e e o e e e @ @ @ @ Je @ @ @

d* L WCZOOww **mP4 mo49 NmNNNNNN U24 00000000 e e * * * * *

• O l

cooooooo W om4NMM@o I e 4 4 4 t i l

• W Z ,. C a m C w * *

• e *

• a NNNNNN~N ======mm

= 0

• e @@@@@@pc 0000c000 q g a e o e e o e e w@w l( A e e e e e e e e e 4 m3m 64 w g DNoooooo ooGooooo M 4 4 4 4 e e i t I t i l e I l l 1

y e oNomd@>$

m e seg 11 2 e o e e e e e e >>>>2eme

@@@@e444 ><2 la m o e a e e e e e e a a 00000000 a 4 mmmmmmm.

g a I Ce l@ 4 f N N N N fd N A N 4

e a

cwsw: :mQuQwgT2

_o_e_::

LACA3@fA cwsm: _ Q TTT

• g>e_eC:

2?: #1/@@

l NNmm NNMm 1 @w4==C2 44wwCJZm Awew=O2 44ewCJ%m I

3-1G

I 1 i

I i e

I 6

i A 3 .J ta. 4 e= W e@@Ke4hm e e e e o e e e N N .= m .= == m .=

C e= + ik 2 c@ i z ==

e o e e o e e e o e e e e e e e i

I 0 Q *e M iV 3 m m e ? .2 @ m. .= 2 I em 3 y @ Q .J em C .=

m Nm ,e@.=@N N N A 4p o. mmmm t ooaooooo 1 e e e e e e e e 4 4 .= 4 P* o N h ** coooeoOc e

• C e O .J = 0 e 4 4 N m - .= N e I e i I

I .a mm .= .a .=

e 0 > Aec.J=CA N.= 4 a m e o r o.= . e e e e e e e i O == @ 14 .J o es o e o == cm o i 1 e t 4 4 4 0 e i p @ @ @ t == 4 4 0 e= > A O .J == 0 A N .=.e N m m @ @

????????

9 I ooaoooao e P= t3 4 h $N24 e= Q em lN 2 e e o e e e e e e e= @ O .J .= C # 4@4mmm*4 o o o o o o es o 9 8 e i I I l 1 4 0

I ts @ .= .J == U 4  % tc. m >= 4 4oe e e e e e e e oomom0%@

i)

NNmNe I .= m en ll =n4m4pgx e e e e e i

e s. O s= i t et e == e <=.=e I

i e= 3 0 A *A Z c A e e e e e e e e 1 . = = . =

L oowooooc

>ce I e O == # 4 I O A e e e o e e e e Im w e e e e e e e e eoneoooo 0 $ t t I e ea

! - . . = . = . = . =

i' oooouooo ll *OE>4TC# e e

• e * * * * *O> $ 2 == a e e e o e e e oooocoao I

i e 1 9 e a t 0 0 m

• O e= 11 : e e e e e e e e il 1 .= .e me .= == .=

e oooooooa 4mm44m4o

/ e= C w lL5Ce * * * * * * *

• e. ?ArtDtoc l 000oooJo m o n= 11 c e e e e e e e e 2 0 t i e ae 1 I oeoooooc I w P

H VCc

.= - .

e 4 4 0 t t t 4

== o e= 1. . e e e e e e e e cpN @ooe T @ M 4 4 em N 4 o m == N .= N N N N I >cp l te, w e >cy e e e e e e e e e e e e e e e e

@ #@de@dek oooooooo 1: cecrerer - c e= tw o 4N arpen oooeooao p p 4 0 .= f% 4 ==

2 == e= 2 4 em ied e e o e e e e e ooooaQoo I Dooooooo e e o e e o e e

== 4 6 4 4 0 t t t , o o ed o @ o o 'i 2 0 0 3

a 4R$

2 5 ?NOf%.2 .C.a a.= = N ma fV o o o e

• o == N C e= o e= 12 e e e e e * *

• a o o o :s & o e I

• • oooooooo e* 3 e= l U et e e e e e e e a w = - o o .= o e

v NNNNNNNN 3 oooooooo

• O e= l e .J NN-====.===

e e e e e e e e

.J 4 K t 0 2 *= 4 e e e e o e e aooeoooo oaoooooo 4 0 t I

e 4 e e 1 I e 4 4 4 t

t i IegC2w#A =am.====.

t E o==N @ A.iN.. N === . oeoooooe i ooeooooo e = o == lr c e e e e e e e e t @ == o @ 44NN oooooCoo I 4 a

t 8

I i

UO2Q3V>

e e e e e e e e Cm4m4m37

% N N N N f"$e Dh% R44 @ e N

u :S O t 6 t 4 q I e 4

?/ff@fff ecoooooo e e e e o e e e

^ t U % .J O "X *e C .eJ e e e e e e e e ooo@oooo I N-NNNN=N

• O 4 0 t t t i e e t W I C 0

.= m .m om g i Afff????

I e e e e e *

• e ooonooeo es t == c > l er J ac oNoooooe 'a O

• to #

• e * * * * *

• c I I 4 1 4 0 t oooccceo 4 I I I I e 4 0 I g i h e e =J 4 e la I SNOh 4m44 e e e e e o e e n. e 2 1.J e= 0 e . . e o e e e

_ t tre44 444 0

• I A 4 3=ce*#

• ? I @ O *P 1 @ 77& *= 2 2 T .= Q p. z- e e e o e o e e I M

• -4 3

• 4 4

0 l

4 t

C4 e f et Y 3wA>t NNNNNfvNN

• • 2 W 'I *= 3 T T 30c tr@t5 Ate o "O c CL I m N N N

- 0300: OO C+$AX###

N N ==

• = 3 e= 4 > 3 7 3 r3 e Ib 4 0

t 4

9 I

1. e= 4 m *= C Z

% N ee m 4 4 W W C @ I ** @ w 4 = em OZ r% ~ m e' er g w w J @ t .=

i I

1 8

9 3-19

4 4

4 0

8 e

f Gm@ lN g e e e e e e e e

1. N?k4=4f C~+ lE m e e e e e e e e "QE40Jm2 Ac44*ehh

• treD@Det opmmeNmN m-N-mmN-pCACs=CA c@eest@N oconoeco l 3=@ lV 3 * * *

• e e e e ocoooooo e aNemdemo 4 4 0 0 4 4 8 wfp3amC+ ~~~mmmNN 4

4 CmW le d mN=4mmm=

0 =>ACJ=CA 442e4Po? *

• e * *

• e e e 4th emeNe 0000o440 4 = e e t

4 0 >40s=ce haet444h *CW IN

• e e e e * *

• e eh t@=@es m De4*Nokp eeGk4 4 cf

>C* * * * * * *

• i 4

cooopooN e e e e e e e e 12 4 amm=wame 4 3A=Jwv4 mm--de-@

t i I t 4 I e =======-

6 occon9ao 8 *CC21EC# ** ***e e e

• WCW l@ w * * * : .*

• e e ocoopoco e

4 4 4 0 4 0 4 ef f wCmALT3@ e * * * * * *

• 4 4 *CW 12 m *

• e * *

• e e 4 ========

t o000000o 4 *C2waZO@ e e * * *

• e = wow 11 Z e o e e *

• e e e o0000000

' ' ' ' ' ' ' ' memeNNye

> 4 4 4 a ====---m > cw lg o 4 4 W. O 4* *

• e 1 oooooooo oooooooo 4 *C* 44IO4 e e e a e e e e oooooooo e pop 14 2 e e e e e o e e I 4 e i e1 4 ee 1

e WOO e.N.Neo. ettomere m m m N iu 4 4Gbteff

= 0 *= iW W e e e e * * * *

1. o0000000 M e@ e4Noba K wCQ e e o e e o e e e ==-Ne@=c >CW 10 0 oe4 e m N W.v.--m- NEtre 4 0o00o000 2 pr@D@++b e e e o e e e e 1 00000000 00000000 2Mw24>w e e e e e e o e 3 g e oooooooo e t 4 4 0 4 0 0

- @-o00044 s T N@cPe@me 3 4&Stcome >Ce lU 4 e e e e e e e e n uomooooo 2 .e e w 12 Ne % e m e eN e. m m e e e

C 0000o000

- 4kmemece

= m op 14 J e e e e e e e e 4 NNNNNNNo cooocco-U ooooooom C 4tXO2~4 e e e e e e e e w o0000000 --mmmmmm a e i ee e e oooooooo I oooooooo t nOw l2 @ e o e e e o e e 4 NNNNNNNN 00o000oo 1 I4302WA# e * *

• e e e e t t t t t I e e 8 4 4 4 44 4 44 0

8 D##??@Ab '

t opoffppp oooooooo e e e e e e o e e W34 e e e e e e e e a WC233v> mm>2&c?z osoooooo i ======== 6 9 t 3 g g g g i

i I mNom2Nek ========

I vZJCEmC4 e o e e o e e e ocoooooo

^ l NNNNNNNN wow 14 # * * * * *

• e e 7 4 Doococco G t t I e . I e t e 3 e fkkff@nt c i e 2*

e e e e e e e e ocoonoco w4% tJ m b o e e e e e e e w 9 94Jt u 8 4 ee e C 8

1. 1. ttece&

4 C C7hh 4 4 #4 *322m3>> e * *

• e *

• y 0 e o e o e e e e = = = m m N N .e v 4 42 14 %

t 44 4444 44

• e

• N@eCate4 8 betetenk r3Jwdww e e e e e o e e 4 0 C4 l@ 4 K ======== MNmm 4=NN

• 6 9

9 8 0w4*I k

C CDC2}33 g*3*2 Qw1*T ~{>T*T2 3.COOOD

" t WettLA++ @@Le%@te 4 I m 0 Nrm

• H I NNM*

4 #>4w=CZ 44Ww@$2= A>4mmO2 444WC@Tm 9

4 4

i i I 3-20 -

E .

l PrDbb?@r  !

t o00090cc  !

s one (N Z e e e e o e i e coconeoo l i 1 i 1 0 0 0 0 0 <

t I t

t f@@@@fhe e

i ow@ l2 = c. o e ce oe eo eo eo eo e 00000o00 0 1 0 0 0 0 4 0 0 0

0 t Om# IU 3 ==@ettme e mN4mmm Nm oooooooo

=42 la m d NNN.motNM

• e e e * * *e o * * *

• e I i 4

4 6

>323mC*>

.e m m m N a m m em@kD4k=

e * *

• e e *

• NNNN@4 4m ococoooo

• mmmmmmm ee e e e e e e o e 1

l D24N>hpb Dm@ l4 J 000o09o0 I I ADsadww e *

• e e e e o t t t mmmmmmmm I

t m4&mtm@N ffDff&??

t mot +CJmC e4@Katen acocoooc 8 *Cm IN E

• e o e e e e

• 4 mC+DamoA soG% wmme oooooooo Coo?C@?? I t I l l i l 0 I

I i ==

>AACJmOA ANAmm@mo kmhtOMNm m == ce#0 mmc 4 4 >3> lZ 4 e e e e e e e e a mgh=ctam ========

>>@CJmO@ N Oeh m% to I

I 0

4 topemNNr m===mmmm e m@CJm3/ *N**NNmm oooooooo 4 mammmmmm >Op l@ w e e e e e e e e 1 00o0000o 4 coSONeom 0 4 1 0 4 i e t e e e e e e e e I  ?

M r

4

/

a CAmamv4

=0031%3A mmmmmmm #

t t 1 8 mmmmmmmm ococooos e e e e I

e e e wo= 1: ~

eDPbb@De ocococoo e e e e e e e e oooooooo i I I e 8 0 t t 6 ocococco I 3 e

w3m /1ZQ@

6 8 4 e I e a e

==

o00o0000

• e e e *

• e cooeroeo

>Om lE Z b@bO@ebD c* o* c* oe o* oe c. o*

oCooGaoo a t i eee : 0 m e e 4 e ea e e I

T e mmmmmmmm 44mmNemc

/ cooooooo 444 4 m N .e =

e e e e e e *

• i *C2>1%OV e e e e e

• e e >C= II @

O 030oo000 oooooooo E 8 6 8 6 6 4 1 6 mmmmmmmm ffDDe@At oo000000 oooooC oo

= =cm 14%gm e e e e e e e e Cooococo now li m o e e e e e e e ocooocco z 4 4 8 0 4 4 0 t 1 4 0 4 4 4 4 4 4 n

2 DONNotoo O QQC mmmmmmmm @mmeNewh I >

=

U C

a 4 *C4 42240PN4 e e e e e e e e Edme&4NA

1. ?ftso@o

>Qw

>O>

l4 w lu D NN EhCo2m e *

• e * * *

• acCococo edso*DDPD oComooom M4commem I 2m>T4Mw 4 e e e e e e e e coGooooo 6 oooooooo e e e e e e o e ooCSocoG 9 1 0 $ $ $

t t 4 0

. memo 4~mm 4 momoooom k?4Ampar 3 wCm $2 e e e e e e e o I

e o0000000 CC@tmA4m i >Q> lW 4 e * *

• e *

• I 4EESZm4 #NMNNNN* oooooooo e oo000000

$ e e o e e e e e e ocoooooo N=NNmNNN 1 1 8 8 >CW l4 J *

• e *

• e *

• I t 33000003

^T t NNNNNNmN y 8 Z42CZwff e e o e o e e e D 4 44 4 444 4N mmm=====

c e socooeco w 4 cococooc C. o. c. o e c. c. Ce o e

u e e e e e e e * =ck II e e 4 VC20 V> NN#2m@ c4 mm~m-m~m I3 e

,8 i

0 s

urJC3=Cw rommr><<

e o e e e e

• NNNNNNNN v24 S. o. 4c o. c c. o. o.

1. 1. cA###4 cococcoo 0

e e e e e o e e s PtmffDt? o00000oo 4 t e e *

• e e e e a e s 5 e a e 6 I =C* $4Jg comOCCoo M i 1 8 9 I a mammmmmm

@ l oCCmom CN cOoooCCo m i g4% 14 % e o e e e o e * =ce, (4 f s 6 e e e e e e A 9 fffd.ftff o2oC000o C 4 1 4 3 i e a i Ib 0 i

t 8

t 6

4 04 l#43 1%%w%

NNNNNNNN

==

0:T*T*J]}

02C: - -

Et@@t+ff Cw%"

kT*3>233 C2C:C23:

LfxAL+m+

I I l I

8

/*4>=CZ NNm*

44wWJJ a A>4>=C2 NN**

44Wa@ jim 3-21 ,

t Cue IN

?@bf@@@@

OOOOQHOO e e e e e e e e l

0o000000 1 4 8 4 4 4 0 8 9

9 @@@@@@@@

l 00000000 0 Cm@ l2= e o e e e e e e e O0000000 4 0 4 4 4 6 4 0 0 0

t I Cm@ tv 3 Neemstem i NN@mmm@m 8 00000000

$ 4heded44 e e e e e e e e

$ we2 lW m d e e o e o e e e 0000000C I

0 OOOOOOOm I l t

8 nom @edND t >322=Cww e e e e e e e e ~~m=====

l medNNmmN e e e e e e e e a Cm@ l4 a Oooooooo e #3awd*w t#N#O@me 4 8 ea e a 8 e e e e e e e o e ~NNmmm44 ,

I 1 @@@A@A#@ i e 00000000 0 @@oem@mN wCW lN Z e e e e e e e e t wCt# Cam: 444444 44 00000000

$ $ 0 0 4 6 1 4 1 i em@m@ hoc l =C#camC@ 4444meme m@@@OPNN t9 eon @@N m4mmamed

>@@cs=C@ m ~~~ ~N wow lZ 4 e e e e e e e e

~~~~~~~~

demmeter

< w>@@JmC# mN4mmmNm i

ammm==mm t >N07NN@ e 0000000o t m@OJmC@ cm~@aa@e wCw l@ w e e e e e e e e 4 00000000 1 OOOOCONM I e 0 0 0 I I a e e o e e o e e

> C@mJmU4 mmmmmN99 m l i l 4 @@@@@@A$

u 00000C00 E ====~~~~ *Cw l2 = *

• e e e e *

• 4 000o0000 00000000 WCO21%C@ e

• e e e e *

• i t t i t I e 4 0l OccocooO

• I 4 0 e i B 4 0 3

9 @@@h@@b@

~~mmmm== C000000o OOODOooo w3= lE E e e e e e e e e

>Cu@1fC@ e e *

• e o e e COO @OoOO 2 00000000 4 4 4 4 1 0 8 8 w i 4 8 0 0 0 0 0 1

4 mmmm==== ht@hh@No 000o000s mmmmNaec

@I >Q3w1IC@ * * * * * * * * >C* IE C e e * * *

• e a 3 0000000o 0o00o40o E e e s e ae e e Nmt~N~~N @@@@@@b#

00000o00 00000000

= wow lA Z o # e e e e e wow ja s e e e e e e e e 2 00000000 00000000 1 1 4 4 8 0 0 0 1 n UCC *DC*NetN 2 m mmmN 3 ht@mm=CO m wCU bemCoGO@

De O N =e @e @e e e ot M m

=

• e e e e e e e new lw y 4 mmNa>4=>

~

mmmacomo g V

C a @@@@@@#A >C> jv 3 o@mhtett ocooC000 #enn=4 4~

I Zmm24wW e e o e e e e e oo000000 0 CoOODoCo e o e e e o e e I i 0 0 1 0 t i 3o000000 t i I e omN##@@@

t @@@meetm

$ won lZ e e e e e e o e D44CNOkt l 000CooCo @&een@4@

g >Qp lv 4 e e o e o e e e 1 (7132-4 NNNNNNNN 00000000 g mocooCOO g e e e o e e o e 4 0o0o0000 Nmmmmm4#

1 i e 8 e i I l >Cw le s * *

• e e e e e a D0000000 m e NNNNNNNN 5 I I43CZum@ * *

• e o e e g a @@@@eede mmmmmmmm i CococcoC 7

C t e

t uO;C=v>

fftf?NCD e e e e e e e a Wre&NmOC wom l @ o0000.CCo

• e e e oc y I mmm-m=~m oi c4 C. c c. C.

4 I i O t SommtSO#

J e WImC2mC6 e * *

• e e * * #####@#@

V e NmmMNNmm ocoopOoo a y40 e e e o e e e e m l wO> l4 4 % > @Q@@pp@ CCoOOC00 e $ e e e e e * *

• I $ 6 4 0 I 6 e 4 8 COCOCC00 e 8 8 i t i m e mmmmmm==

4 NNa mCMC4 g 4 ad it e e e e e e e = ?w $4A Oe O O. O e C e C e e C eC m t @Pff@@te 0000000C o I e a e e ee a e e CCocooCC C4 (# 41 mmmmPFW "

f I s = 2-2*T2T > 2*2=34T 4 Cwa >T COO 3COOO Cwim! 00000000 0  %#LB b#@ 2#C#L@@t i

I l  %%mm NNme t #>4p mCP 44mW@CZm @mf>=C2 44Wwd@Tm 8

3-22

M M M M M M M M M M M M . M M M M M M Table 3.4.1 (continued) .

= ---- -------------

, _ .-------,--------------------------------- tocation=wul no_ sam =9 va_ San =r9 -----------------------==

C H I T T T T I T I i 5 i H C A A N O O O D D I V 5 0 0 5 U I 1 o L 0 I o H M i i H I o 5 5 s 5 5 M u H A Q DA A T C 4 D M i i _

i 5 H I O O OO 5 L H N i E_ H A D N O O H P P P P L L L L L 0 F 1 _

1 P5 _

A I O E N I A IC H H H H I i 1 I L L & D L 0 i a P L D C 5 I _,

i OO O O O O C D D D D I T T I Go H M N M E i 5 A N E CD 5 5 5 5 4 5 5 5 5 0 L Y 6 A2 Hot 26 5.0 1.2 3.0 15.9 4.1 -0.02 0.35 -0.05 6.3 32 0.01 -0.01 -0.01 -0.01 3.7 110 104 5 100 9T 19 3.0 1.0 a2 Suw?6 5.0 0.8 3.0 16.5 5 1 -0.02 0.44 -0.05 7.6 20 0.01 -0.01 -0.01 -0.01 3.7 114 M6 10 89 101 2.9 2.M I.I E3 HOT 26 5.0 0.7 3.0 16.0 4.1 -0.02 0.19 -0.05 6.3 28 0.01 -0.01 -0.01 -0.01 3.3 87 6H 5 80 64 3.3 2.4 1.a f3 54426 5.0 -0.5 3.2 17.0 41 -0.02 0.31 -0.05 14.0 40 C.01 -0.Di -0.01 -0.01 31 102 M9 . . . 3.2 2.8 10 G HOT 26 5.1 -0.5 3.4 13.0 4.1 -0.02 0.31 -0.05 6.6 32 0.01 -0.01 -0.01 -0.01 6.0 101 60 6 69 61 -1 0 2.4 16 6 50926 5 1 -0.5 3.4 12.5 4.1 -0.02 0.27 -0.05 6.0 28 0.01 -0.01 -0.01 -0.01 5.3 133 104 22 lie 6M -1.0 18 15 H SUH26 4.M -0.5 3.2 18.6 5.1 -0.02 0.22 -0.05 P.a 20 0.01 -0.01 -0.01 -0.01 3.2 117 99 l'a 90 59 2.3 2.9 10 1 SUR26 5.2 -0.5 3.5 13.0 5.1 -0.02 0.35 -0.05 5.3 24 0.01 -0.01 -0.01 -0.01 5.9 115 93 8 95 70 -1.0 22 1.4 5

i i i T I i T T T T T T T u o O O

1. (s 0 0 0 0 0 0 0 0 0 0 0 0 0 I I I I T E T T T T T T T T T T T T T 5 5 5 5 I P _

i - - _ _ _ _ _ .- _ _ _ _ _

O Y A H H A C- C F P H M N 5 N Z A C_ N Z N H S e G L A U E 8 G N 1 E A N L U 1 N A2 Hai -0.01 -0.05 -0.001 -0.1 0.M2 0.042 0.95 -0.05 0.44 -0.05 -0.05 -0.01 1.23 -0.05 -0.1 P.032 -0.05 -0.05 O2 504 -0.01 -0.05 -0.001 0.1 0.M7 0.044 0.95 -0.05 0.=5 0.05 -0.05 -0.01 1.27 0.05 -0.1 0.036 -0.05 -0.e5 E3 HOT -0.01 -0.05 -0.001 -0.1 0.95 0.0TS 0.94 -0.05 0.45 0.05 -0.05 -0.01 1.30 0.05 -0.1 0.050 -0.05 -0.05 E3 SOH -0.01 -0.05 -0.001 -c.I 0.93 0.075 0.96 -0.05 0.47 -0.05 -0.05 -0.01 1.32 0.05 -'.I .0.044 -0.05 0.05 6 Hof -0.01 -0.05 -0.001 1 0.52 -0.016 0.79 -0.05 0.43 -0.05 -0.05 -0.01 1.15 -c.05 ..! -0.014 -0.05 -0.05 G SoH -0.01 -0.05 -0.001 -0.1 0.54 -G.016 C.76 -c.05 0.42 -0.05 -0.05 -0.01 1.15 -0.05 i.! -0.019 -0.05 -0.05 H SUN -0.01 -0.05 -0.001 -0.1 0.92 0.050 1.04 -0.05 0.47 0.06 -0.05 -0.01 1.28 0.06 -0.1 0.040 -0.05 -0.05 I 504 -0.41 -0.05 -0.001 -0.1 0.63 -0.018 0.75 -0.05 0.42 -0.0% -0.05 -0.01 1 19 -0.05 -0.1 -0.01H -0.05 -0.05 u

4 ta LJ

??t@DPtr I ocooooso e C=@ lu r e e e e e e e

• 1 oooooooo i i as i s i i

?@t@@st?

0000o000 Om@ 12 m e e e e e e e e e

oooooooo 4 I I e e a e e e 4

4 i CmA IU 3 rmkh tT yr i m amemmNm o oooooooo tDoDCotC e e e e o e e e

> 42 lJ m d * **e *

• e o0000000 comoowoo ee s m322=Q>> Ceeko@oe I e o e e e e e e mNNNmemN 4 mamm@NON Qwc $4 J e e e e e e e e

= N 00000000 ADJs4>W t4@Noo@o  ?@@@@@p@

e e e e e e e e NmNNmmmm o0000000

, ea 4 >C= IN Z e e e e e e e e 0o000000 I

4 Sm=4 e@@m e t 8 0 t e i e 6 >CT#OJm3 Nm@m opo l mm m m m 6

i Ntmo40 o N. k. .e.~t m m. 2-eh 4 *C@QJmCD e@cNDNNo >O> (24 e e e e e e e e e um====== mm==mmmm 8

8 w@@Cdm C@ @Noo4% @ 4 ========

e ===N =

0 0000o000 t m3@QJmCA #9th Tm@m >O> l@ W e e e e e e e e 4 4@ht@o@Wm 000000o0 e 4 0 0 4 i e i e

@ @@@emC#4

% */OJmO@ @%mN@mmN @@@@@@@D n mmmmmmma oooooooo 1 >Q> l2 m o e e e e e e e 4 NehhmNem o0000o00

@ Q@mJwv4 e ******* 6 e i I I t t 6 i NmmmmM4N 2

> mmm<emmmm PDODD@t@

0o000o00 00000000

>OCRLIC@ e e e *

• e e e >Op lE Z e * * * * *

• oooooooo oooooooo N 4 e a eee e e 4 4 e e I e t i e

a mmmmmmmm E oooooooo @@@@@@ma e *Ca#1TC# e e e **e e e (@@(44e@

ooooeoco *Cp (E@ e e e e e e e e

@i e e e t t i e e o000o000 k >c1*LICA ========

@t@@@@rc o oe oe oe o. o oe oe oooooooo m

osoooooo e >Op 14 2 e e e e e o cocoooco e e i a 2 e eo I e a e e 3 p C= 1113@ emmmmNom n 03000000 o e e e e o e e neceNs@>

C ocoocono mm4mem4m

= g i e *CW IW W * * * * * * * *

• 00000000 4 42&Ne4Ne v UCC 4N mN

• O WCW lu 3 eo@mmeet e nomeon@c R4 4@memm

>Cu e e e e e e e e cocoeoco l @@Nm@mNm e e e e o e e e 9 00000400 4 @@Abetb@ s l l 0 ococcoco e 2=w24pW e e e * * * *

• i 03o00o00 =Am4NN NN 4 4 ee cooO4#mN 4 =C* IU M e e e e **e e e me@edNm@ ====o0~o 8 NomNooos

>cw 4: e e e e e e e e t ococcoco por 64 J =e N. m meNeN. m. N.

e I 4 1E32=4 NN#NNNNN 00000000 e ooomoooo A e o e e e * *

• 7 e oooooooo mmmmmmmm ococcoce

& i e i e e e p I occooC oD C I T4 302W#@ NNNmNNmN =Cw IT C

• e e e e e e =

w a coo 3o000 u I mmN=NAAT 4 4 l e 4 4 6 8 g 4 UOZQ3Ga NNNN==Nm O Pp@@@@@p 3 . Wz exme. 4. D. 4. m. n. t. a. k. eccocoee

• *

• e e e e o i NNNNNNNN JT4 I Coscacco t @@@@NDec e a e e e 4 e t 4 e e e o e o e e 4 8 >O> 14 J K CooooooC

• I e g g 3 4 mmmmm mmm M 4 o0o00000 6 ON@m@ O&m *O> 14 # *

• e e e e e e

@ t J4T lA Z e e o e e e a e o30oo000 M 4 @@4#4444 t t t I e I f 4 5 F) 0 Q4 l@ 4 K 4 44 4 4 4 4 4 b e *2*2*T33 *2*T>332 6 QWi>T 0000000S cwa >Z C00000PO 8 T@ tic @r# T f f- @ : @ v' t t

4 8 NNmm NN*m I @>4>=CZ 44WWd@Tm #wd>*CZ 44 Wwc@ Im e

a b24 e

I Table 3.4.1 (continued)

Translation of abreviations and lower reporting limits (mg/1)

_Abreviation Translation Reporting Limitp M )

LOCATION Location M0_ SAM Month sampled YR_SMi Year sampled STATION Station I DEPTil DA_ SAM LAB _Pil Depth Day sampled Lab pil I TOT _ALK CllLORIDE CONDUCT Total alkalinity (as CACO )

Chlorido Conductivity (umhos/cm) 3 0.5 0.2 llARDNESS 0.1 I AMMONIA TOT _N NITRATE liardness Ammonia (as N)

Total Kjeldahl nitrogen (as N) 0.02 0.02 2

Nitrate (as N) l I TOC COD TOT _Pil0S Total organic carbon Chemical oxygen demand Total phosphorous (as P) 0.05 0.1 1

TORTilP110S 0.01 TDISP110S Total orthophosphate (as P) 0.01 TDOPfl105 Total dissolved phosphate (as p) 0.01 DSILICA Total dissolved orthophosphato (as P) 0.01 Dissolved silica I TSOLIDS TVSOLIDS TSSOLIDS Total solids Total volatile solids 1

1 1

Total suspended solids TDSOLIDS 1 TDMSOLID Total dissolved solide 1 SULFATE Total Sulfatedissolved solids (0.45am filter) 1 TURBIDITY Turbidity (NTU) 1 TM4_LIC 1 i Tannins and lignins 01 TOT~ AS CRb Total arsenic 0.01 llexavalcot chromium I TOT _IIG TOT _AL TOT _CA Total me. ary Total aluminum Total calcium 0.05 0.001 0.1 0.05 I Total copper TOT _CU TOT _FE Total iron 0.018 TOT _PB Total lead 0.05 TOT _MG Total magnesium 0.05 I TOT _MN TOT _NI TOT _SE Total manganese Total nickel Total selenium 0.05 0.05 0.05 0.01 I TOT _NA TOT _ZN DIS AL

~

Total sodium Total zinc Dissolved aluminum 0.05 0.05 DIS CU Dissolved copper 0.01 I DIS NI DIS]ZN Dissolved nickel Dissolved zinc 0.018 0.05 0.05 3-25

I ohh.h.N..M.h.o. .m.NN. . ._.om.@m.oNoo..N.N>.N.

fPha@@@PENhm@N@@@@okot D

C*t=NtNamdearmoemhe@ot i

memd(@ MON @P@@Noovekado e e e e e ***e eeeeeoeeeeeee emO@ e e e ehem e e e@@N@e e e e e CPoetS$m24h PadetmNNE@4ohe@CtedNag e a i y eoeeeeeoe { met @4Ehe**eCNNNENmadam mEPo@WNMe@@E@mtF@@4MN@

==@4wPEmesmeNPNom6m@m= a s

f 6

I i

. .._.m..o...m_.o.m..-_m L..hmPocoomomo.ho-..._mo L@hMoooohocoN@o@@@@mfo motmoNe@@

U mthP4mNommmthmoPMPm@hm kNo@mhmohhhm@ho@hstCoe i

$ hMotoo@o@omoe

@@mNooNoWokom@oNm=NmPr 2

e @e=FN#mo@@@he@e=NoWN@m 4 i N@teco=@ho@oh@@PooPONc NONN@oSN@otoP@@Moommo#

= @@ePoEE@tetoksemopm@mho=Nm>NNNN@NmWo@mooNNo@

meMofPe=P@@

{

NOMoW@h=N@h@WMooooomos e e e e e e e o e o e eedMomoooNoo 3 5 I eeeeeoeeeeeeeeeeeeeeee ohmo@omeoNe@opoooooooo 4

eeeeeeeeee y

omdoeMemhthhomoooooooo J

em m Smm=*

oomh@ a == md mN @ Nm ==

N MEmbo o m

pooooooooooooooooooooo I oooooooooooooooooooooo ecocooneooooooooopocoo y

e oooooooooooooooooooooo oooooooooooooooooooooo t

8 anoooooooooooooooooooo oooooooooooooooooooooo a

g R. oooooooooooooooooooooo omoooooooooooooooooooo

{

u ooooooooooop3oooooooSo oooooooooooooooommooue U

ooooooooooooooooPhoooo coomooooooooooo@@oh@N@

4 Q

I ocomosoooooooooo@odhNN

@@hNeo@oooooep q GmN@Ned N

eth@No@ooooo@eMemNe@em eeeeeeeeeee***eeeeeeee eeeeeeeeeeeeeeeeeeeeee 4

t PmmN=N*PMNtNo@emoo@emm

• 1 C oP4N@NoO@memoo4Noo@@mm

%@@ mMN@ookmNN

= $

{

m>@

m emNk@@ don

• m G@ @@

n * * @@m@@ 4 C

e@mdNoNmhPhmN 1 mewtmaoPeoh@PnePmmm@ok

- >@oNaoPc@@.em~~@me h o k @ h m o d N 9 N es eNo@Po@@@m h

3 %r meom .o m@e o 4 @ m. m@ o. P h P e @ m e c h m @ e m ModP@hochoN@WashNmNed@

M Re @mem@@Camoe@@PMhe@NmWm Pmo@@rodmhcPooomese@mm

{

WG@

@@o@@ OPEEh@@oP@

@@Noaq@NEmomeomN@ pod OWmphPm O 4W echa@ hot d@oh@@kP@MPmP@ $

"M wK @@mommeNPPa@@hhtelmm@om de@ee@PmPomeoW@NP 6

( ddPOPm@eE@med=ohomemmE meNomov0CNeeNNaooo.omeo e e e Q4 wQ *NkoNNNhogmeNNamosomeo

=P4hd 4

< eeeeeeeoeeeeeeeee ONmomeo@mmNmoooonooooo a

A @ .ee**.eeeeeeeeeeeeeeee >

o m m o n :A o==N om P= a o o o o o o o o o o y

U g

• w O pooooooooooooooooooooo J

@ oooooooooooooooooWoooo ococoooooooooooooootco "W

m S

a w oooooooooooooooooooooo oooooooooooooooooooooo 2 H oooooooooooooooooooooo oooooooooooooooooooooo a

m I

w ma 3 eooooooooooooooooooooo oooooooooooooooooooooo 4W ooooooooooooooooooooto oooooooooooooooo@ moose y A MW poooooooooooooooNWoooo C ooomoooooooooooo@t@@@>

o@o@ooooooookONkoooo(@

y W O E 4>

conNooooooooooomemah@@

o@oheo@ooooo@hNmoeo@@P o e e e * ***e m> mope @PONOMMMaooommom eeeeeeeeeeeee eeeeeeeeeoeeeoeeeeeeee ENa@m m@@ Na ewe e

@@e>NPmmmmoommom N e

Ma N me one em se N @ omM en om os N.

e F e

4 cooOJooooooooooooooooo ocooooooooooooooooooon h m

{w ooooooooooooooooooooom ooooooooooooooooacocos a

=

oooo ooooooooooooooooo g

• 4 ,5 1 aooooooooooooooooooooo oooooooooooooooooooooo w oooooooooooooooooooooo ooooooooooooooneconomo y

w mJ 24 ooooooooooooooooooooco oooooooooooooooooPoooo cooocomokoorococePoooo o o a t o o o o D o o m ;s o o o h o @ @ c h M W

M =>

I coomenocomoccoo@moEcke OPomm@@oooooe@@o.ooWmmN 4

d k @ o o P @ @ p o c o o eeceh.m -o eo @

eeeeeeeeee e eme ee Ne m E

eeoeeeeeeeeee.. eeeeoe m@Nomotammmmmmoooo4eom e

S s WN g

N@Nomeoh@ePmmmooooooom a VN dm 4

4 m @m y H W o@@Nm4@@mm@mmePeo4NE@@

Q

& 7 Pmo@h ono@hmeo@@@Nhoced hm4Cm@hmmCPNmOEPENkPar i M @ m o 4 @ @ M @ P e @ @ m > N @ @ eno N o EPom@Pm=@mPom1o@@hh@@e M OC a= m e h m @ e e N e c o N = @ m @ o m e e>Nm ee #

n e@Nmm@4h@mEEteNoh@@

CANtee@he@oWONON@N4 men fem 3 em e4 *mewhmenh@N@moe@m d@eP@Na mko#NmetO@@N@@4%motme@

C CW @cedeem&oNeCNm@etm>Pmo@@P@@@P mOPmP=mmm@m O 2* PN*Le@st N@mPmdoPNEPateemmodh@@ keP@m@eph

= @ @ 4 N e t w m *4@@moh@N=oomm*N pe@ om e eu PJ e eaemet ameme@e Ee cooeneo ec ee @ e eo ep e g 4D

>W m@ P m = N m e e ta m f @ e N m o o m e o N o g eeeeeeeeeeeeoeoeeeoeoe

, @C omeoN@N@tehNoooocococo

= MNmNM

= em mm M

e c o n o c o o o r o n o ci o n o e c o c o ecosonomooooooooooosae soonoococococcoo@occco d conocococcomoucouacomo ooooooooooconomut@oooo J ceD@ tauoconoconomeoooo ocC@ooooooooooooNoo@op

@@@Noo@oncano@oomoop e@

. 2 e oco@oooooococoo@Nh@co@ t 4

hhtv4@che@copsNo@e@omhh

" w co@Noo@oooooccoNatho@h@@cNeoco@@oo@@@t@hm o@h a

mCmhNothN@@@@

d@hNNoct@>hN@mPNooC@44 MON 4Nmmbh O

E ch ENNo@h cNrNW@toeNedh e@

e I I

e e ******e e e e e eeeeeoeee N @ e Pooeme@. @ . e@emeN e @eN e

@e@. @ c. m. oe o*t h* *

• a

@ Nphoe@NhmNetNNooooooom t es Nm @ c @. e. otN P CE@ M O N NNootceoo=

m = p@mnw -

=

m e

EEErcEeMECEEWCc4Cectre 6 settet@4eteGCEtemeccee 3 Z

m i.

f i

m w @@@C D W W @ @@@c > Ow@

W roccmwwo WOmmaswCmJ334 WOW o s CH@ d@CComWwe n =Uw m-W4JCdedeUUVETE ,'

p U C m m ea s > 2 = J J O e W c e 27%2 Wsoco@h@ 5 8 t i l l iI E

d

=Uw ROZZ mm44JCd=JeVVW612 sacco#6" i I t i l l t t 4

l o g oa

a. *iUCmO@@ttJuZwn@wwww

=

E CCC 1 g7OnUCmc@@@EagEs-w@wwww 1

1C*OCC+#>@

i vv: wwvcww>>>@wwwpowwww 8 COD 3aOC=CCoo 4

.CWO30Vm>@COQs40cmOCCC VVI=wvCh>=ww@wwwwCwwww -

3-26

- - - - - _ - _ _ _ ' -'*---_.m ~'- ----~_mmm_

m L W

. =NeeO.emm=@@Nm>@hm@*** 0 @EO@mh=@emeen@,h. Nom @*

> PPeOhmh@h@mNPOm@mWNN@ C l OPOM Pdh 4mC@D@ mpromONem m

I y o N@h DEU4N4 d@CmONmNa@@@@

e e e e e e e o e e e e e e e o e e e e e e 4thmomee=@ee@mhmethP=P

= = 4 de t h N m t h m 4 N 4 Nd4Na@mA

=

0 4

4 0

0 e

i

@@@h d@@NO@ hbmeOOOWN4eb m

e e e e o e e e e e e e o e e e e e e e e e h @O me @p e@C dW & =t @ce> =fw@

P4Echmete4Nm4ENmm@mm m

_ _h.@_ .O..._ Chm.h. .m.O@ 0 . .__.hm ...@.O. O.m.@. -@

u k@NN@mOOmNN064O@dWWKOm i NK%=C@kmGN Omu=O@m@NmmN O OC@mCh@Oh d@Om=Ommmmh o@ 4 Wh ndNO@hN4@@cNON4@dh Cm I m N m C N I^ 4 0 @ m C O @ h e@mm=NN@ @mE@NC#domh 0CO@mmm@h @

4 0 m

= def@pm=OCNNO@@OOOOmemm i NN4 mNdNCa@ @d@PemOONNem a e m et ee%@@cNEd OE e@mOONMOO 9 ONNamadNhmWO@m@@OONNON 4 =d eONOO# ppa @@WOOOOOmem l NOPO@Nm*@@ @ @ @ WOOOOOmOO y e e o e a e e e 4 e e e e e e e e e e o e e 0 e e e e e o e e e e o e e o e e o e e e e e OPMOmed@@mmOOOOOOOOOOO 4 OfmO@N@mNemmOOOOOOOOOO m N@mEE i G me OOmem C NO h@ 1 = OP =N m um I

• mm n o B 000c000000000000000000 OL 00000000000000000000 1

i O000000000000000000000 0000000000000000000000 K 0000000000000000000000 <

00000000000000e0000000

- 3 0000000000000000000000 OOOOOcOOOcOOuCOOOcocco I' @ OOOOOOOOoOcOOOOOOOOOOO wo00000000000000000000 000000000@ OCOm000@O000 '

0000000000000000mO0 COO OOOh OOOOOOOOOOOODONOs= l 000@O0000000000@=@N@m@

c e > O tJ O N O O O O o m 4 @ m e m > P e t. N m h ee @ O C O O O O O @ @ m m @ N e @ @ @

e e e e e e e e e e e e e e e e o e e e e e u e e e o e e e e e e o e e e o e e o e e e e De@N 1PmE@mOOehd=OO@wme i ONNNEdNOODPOO@eNOO44mm Ned W @ N m OeS e m N m = 1 N@h MON 4 NemE4m =

m a C4 @e 1 m m k@ @m u

I a 02 ne gW wZ NN==O@mOPhmNmm=ON@e@ON

@ N P @ * @ N @ @ m e t*= m O O = N O N o

• m>ONN=NN@woNeh eOmmA@ue h e@@de@eh=44emePOm@@@@

ePNdNCN@doem$mONmTh@cN 4

e l

l chNENem&OdhP@homh@md@h

@4 NEO@hh4@P@ @ omt@O*h e@

EE

@Oce@NmemNaomemh

@ mO@OhkehmF mN chh@@@hNC DOmmCCemh@@WOPa@mbem kmO&20 e@dmememom=Co@@@emmPOe 1 C@Om=== Pad +3@@hmeeNmad Ok NG@ 4 40mEm@tm>NOmOODNNQ I # doe 4OOVNk - N @NOtOOfANO mkNeepmm@@@NNN=OOOOmOO mO@@@ Ohm @OC@fdM*OOOGmOm 1 >Q l

) @ e e e o e e e e a e e o e e o e e e o e o e o e e e e a e e e e e o e e e e e e e e e e O*OOO@ONmNPEOOOOOOOOOO i OOmOm*OmOmNMOOOOOOOOOO m m mm u == ==

d I

h  %

o D g O000000o00000000000000 + 0000000000000000000000 Z

y g_

0000000000000000000000 OOOOOOOOOf 0WOOOOOOOOOO Z M 0000000000000000000000 0400000000000000000000

> =J 0000000000&O0000000000 > 0000000000000000000000 N Me O000000000000000000000 & C000000000000000000000 w ( > 0000000000000000@m0000 W C000000000000000=%O000 I C m

g; se K COGNOOOOR OOCCOOON@md@4 acosamomOOOOOOmNmOOONrc e e e e e e e e o e e e e e e e e o e o e e FOOO42@e@@@meWmOOOmemOm Nm N m

se .N. eeee O@

Q w

m V

OOO@OOOOOOOOOOOOOd4m@@

McDeOOOOOOOOMENEGOOm(O o e e o e e o e o e e o e e e e e e e e e e mmEO40@@mmOeMNmOOOmmON NN m4

.N. sieOmNm se me I

X N O 4

,O o m K OOOOOOOOOOOOOOOOOOw' = 0000000000000000000000

= Ow C000000000000000000 O > CO00000000000000000000 e 13 0000000000000000000- 0 4 COoomOOOOOOOeOOOOOOOOO

> ma OOOGOOOOOOOOOOOOOOO . g3 p 000000000000000000@ O00

@ 2n O 0 0 0 0 0 0 u 0 0 0 0 0 0 0 0 0 O O eva 3 @ 0000000000000n00000000 w mm 000OSOOOOOOOOOOOk@OenOO 900000000000000O@c0000 g OOOmOOOOOOOOOOO@@ N @'O O O t OOceOCOOOOOOOOO@eO@@hN COOmk@@OOOOO@mdOOOC \mm 0 NOOOc@@OOOOO@m@OOO@mmm e e e e e e a e e e e e e e e e o e e e e e e e o e o e e e e e e e e e e e o e o e e e 4 g N4NOOOC@@O@emmOOOOO40m i NhmO=Coh@Nm@m=OOOOOOOm m

. e == t o == 4 as m tv t

t I

e 9

• NeNNNh0NN@Na@@hmN@mm4e I cm@WEhe@hm@eNephm@(m@@

e5 enhememONeceONe@h ee*@@ t De@ue@me @ e c, @ e N e eNm@

@@N~Oec am ee-oeeONeemsch en@@mmeO i mmme@@@O@@ owemc~@

WW ONe@h NmNdNm@oNewemmeem 0 O@@e@mEdNmP@@mm@h DOOmc c4 N@mmmhNe#*PANO&@@cce@@ t @@m@&m>@em4 @@&Emmer=@m 2m @mhhOeOm@@ emO@eN=ON@ @@ t @VmW@ek@iPCc=h OmNNCOmE

( > ch Nmm eNN@Ne@@m* Omm@@@e i W OOn>@@ ken @N@@ emmad@@@

ww MOh=C@OO@cpokPNmOommO@ t eOO=OWN@@w==h @NNOOmmON

@c e o e e e e o e e e e e o e a e e e e o e e 0 e e e e o e e e o e e e o e e e e e e e e e OmNOmN4@N@h*OOOOOOOOOO l ON&OtmNmesm@OOOOccocco e mm NN 4

• mm mm 1

% l IAm 3

O 2

d w

000000000000000005 COOOOOOOOceOOOOOOC 000000000u000000t-OOO@CcOOOOOOOOOO*

@@@hoO@OOOOOWoO@e N O N C @ @ N O O @ c O N C O N'

.(

'OO

@CN O ff O4 OZ N #< =

t I

l t

8 COOOOOOOOme@OOOOOOOO60 COOOOOOOce=4QOcC OOOOOO OOOOOOctomh ecOOO@@ CcOO COO @OOOOON@mOOc@>OOO@@

O@r>@OOOO@ch o@coc@OOMN

@NAENOOOOWN@@NOemN@Om@

Y K 0 c @vm@h hm(@NocmOO@M

@OhN@SNNN@ONONP=1 (mtr E@@ @

i t

N@EdmO@OONeth @@ @@m@hke

@NONCCE@pe=NOOENOOE@ek o e e e o e o e e o e e e e o e e o e o e t e e e o e e o e e e e e e e o e e o e e o e y

y N=@ONdNNmhommN00 , uOum i NOP04mNN@@*

• NN00000OOm N N OC C# 0 N = P@ h@

~

N e 4 I4 4

e 2 ECCEt@CWCeE@@4@CCEECCE I CCCCOCCCENNNEC(ECEc@ct M 4 4

0 0

w 8 O

1 @#@c >

Ib W s

T et

=

2 w

C*@

mvw 7072 COC $

V g?T>UOmOW@@YW32**V****

@##C d@QCC=Wmc UO===J>CmJOD4W74 wasWJOWmW4UUVwZZ JJOOO@kC 4 t t 4 1 6 1 9

> 1 4

0 t

t W

C>@

mvw 3DZZ DCC I JZN=WC=C@#@Tg32>>@>>>>

e@cCC=Wwe UOmmmJ>CmJ204 WOW %

mmWJJC4mW4WWUw12 JJOOC@wC 4 l l l l 4 I l d .04000e@>@O00340 cmc 00C 1 104 00C@@>@C0 34 00=3000

> ww1**vo*>>w>@w=w>Cwwww 4 vur>>vop>>>w@>>>>cm>>w 3-27

' ' ' _ _ _ _ _ _ _ _ _ -_-m_ - _ ,._,______._,_,__a __ , , , , , _ _ _ _ _ , _ , , _ , , _ _ _ _ _ . , , _ _ _ _ , _ _ _ _ , , _ _ _ _ _ _ _ _ _ _ _ _ _ , _ _ _ _ , _ _ _ , , , _ _ _ _ _ _ _ . __,_

I I

. .h0E_.O_.O.@mhO.C....N , _.Nm.NOmemmm_,...Ommmm

> NamNPP@CECOPOpenOO@pce i Deep @h@me@mmeN@@ @ @@@@@

• @@mOOOOONemhkh mOOOmmP@ ap4@@@@@mOhOhw@OmOWNmo y e e e e e o e o e e e o e e o e e 4 e e e e e e e e o e e e o e e o e e e e e o e o e e MOh@dC@m@em>@mhWOOmte@ @mm@@m@kme@@mNMEOOCPNm mmfE46eeeE@@hNek P(Nm i mm44FEmm(dee@eeEP NONm

= 4 W kmh. .m.N..@...-....m. . . .-m-..m-. ......m.m@d .

I y @N@@@ men @NGOGOO400%@he 4 mG44fmNhemNNtGOm@Omm@P

. EPMNmhmeseNPhOctOON@@@ $ khe@m*@@mhdeNNOkOceC@@

4 N M @ @ @ @ h m N = e m @ D O P O O C @ t& # * @@@hW@9Ch@mme*O@ Nome @b

= 4W@h@mONehm@NOOmOOOLNO q EN@h@@@homNN@m@ COO @@@@

R MWem@@@@m@hhMONeOOmhme 4 e@mN#NO@m@mEm@@ @pONCON 4 =OWO@OdphM@e@@mOOOOOOO t m@COe*ONe@PPhoNOOOOOOO

> e o e e o e e e e e e e o e e e e e e e o e $ e o e e e e e e e e e e e e e o e e e e o e OOmONNN@@@eemeOOOOOOOO I OPOOmNNamNh00mOOOOOOOD MN O ONN@h N mm @ mh@mO N 94mEm m @@ dE

,Nm mm mm m 0000000000000000000000 4 0000000000000000000000 O c O O O O O O O O O O O O O O O O O tr O O { O@ O0000000000000000000 T 0000000000000000000000 s O000000000000000000000 D CO00000000000000000000 i OOOOOOOCOOOOOOOOOOOOOO

@ COOOOOOOOOOOOOOOOOOOOO C00000000099000000000O OOOOOOOOOOOOOOOONNOOOO COOOOOOOOOOOOOOOENDOOO OOO@OOOOOOOOOOOOhh@ PNP OOONOOOOOOOOOOOONN@hm@

Nhhh@@@OOOOO@ComOOe*@4 4 #Nhe@OmOOOOO@NhNath@@e e e e e e e e e e e e e e e e e e e e e e i e o e e e e e e o e o e e e e e e e e e e e mm@mMhhm@@CPeN@NDOttimm i Oh4NONPhhDPMN@@NGO4mmm m Ne@ @@NC@Oe*=m = u N@@ eNNem@@Omm m

• D@m@4 m m @@ @@

E PNmNhP@NNh@m@emkoodede me@@@@mN@hmmmphc=O4mem m dF @P@tOON@ ePO@kcNOpomp@@ l O c d N N e O d e m ee @ c h @ M e O 4 @ m @

24 DNommeP@e@hhNNNeochNm@ OeNmmeE@edm@@OO@mc@ MOP EW @@m@@ @heNONN=NCNOONPNm @m@mheeeeedm@mmemoph@h WE @OeSc@emme@@@NPeOOOOWh mM4PNPO@NO*mN$h@mOMP@P PeNEP@mm@C@NmWNNOONeet @OmC@@mmemm@PNN@@ cpm 4@

Ok Nm@@@Acmme@mP@@hoO@Pmb eNM@@OO@@@mO@@N@OO@De@

>Q =P@@@OOONPNOeMNOGOOOOO i mN@@@@@me@MONmNOOOOmOO

@ e e e e e e e e e e e e e e e e e e e e e e o e e e e e e e e e e e e e e e e e e o e e OmmOO@O@eMO40=OOOOOOOO ONmoevedeNMOOOOOOOOOOO mn mm um mm ll o g O000000000000000000000  % eDOOOOOOOOOOOcOOOOOOOO E w 0000000000000000000000 + O@@OO00000000000000000 a K3 0000000009090000000000 n OOOnOOOOOOOOOOOOOOOOOO E ma O000000000000000000000 1 0000000000000000000000

> ww 0000000000000000000000 > OOOmOOOOOOOOOOOOOOOOOO

& ( > OOOOOOOOOOOOOOOO@@OOOO & OOOOOOOOOOOOOOOOPPOOOO W Z COOOOOOOOOOOOOOOOOMNmm W OOO@OOOOOOOOOOOOeOOmmm Q e*OOOOOOOOOO@OOMGOC@@h Q dEOdeOMOOOOOmeCCOOpP@d o e e e e e e o e e e e e o e o e e e e e e e o e e e e e e e e e e e e e e o e e o e e MC@OPN@medeCf@NDOOOOOm MmNObe@@@N@PMe*OOOOOOm Nm m Emmmm m mm m @eNNO

@ mm mm ca mm mm n

I I C O m OOOOOOOOOOOOOOOOOOOOOO m OOOOOOOOOOOOOOOOOOOOOO

> W 0000000000000000000000 > 000000000000090D000000

< O C000000000000000000000 < 0000000000000000000000

> mJ OOOOOOOOOOOOOOOOOOOOOO > 0000000000000000000000

@ Ze OOOOOOOOOOOOOOOOOOOOOD @ DOOOOCOOOOOOOOOOOOOOOO

=> OOOOOOOOOOOOOOOOp@OOOO OOOOOOOOOOOOOOOS@@ OOOO Z OGOmOOOOOOOOOOO@comche 4 OOONOOOOOOOOOOO@OOP@@@

McOOM@eOOOOO@eEGOOmmN= $ N@OOmmeOOOOO@@ @OOONmN=

e e e e e e e e e e e e e e e e e o e e e e i e e e e o e e e e o e e e e e o e e e e e e dNNOtem@eNONOmOOOOOOOm NNNOmOmNPONNO=OOOOOOOm o mm mN = mm em 2 #emmememm==NOWN@OchDNm i =@@@mNemem4Neme@hD=Om@ W CC meEO@PhNme@kapecOO@NOe I @N@meEkmNNe@OPPMhpe@@@

Em OmOC@d@@hOmEW@@mOOOh@N i ehNe@@hmeemhmm@@meMmmm W> $eNe@@hmeO@NDO@@@@@ hee 4 km@Nmehe@@ONN@@m@@@m@m Q4 *@@MO@ePam4 PNP @@OO@NC@ l @OC@Nhmesmm@em@OeOhohm 2m Camdad@NO@cMOP@eOO@@@N chh@@eNONP@m@@hNeOhehr W> @mh9mm@eN@Ch@E@@ccheON i mmm@@emece@o*N9enO@@@@

WW m e @ m @ N @ m m m m e m P O N o O = N ee N eNmmCh4mCN@meceNOOmNO=

VC e o e e e e e e e o e e e e e e e e o e e e e e e e e o e e o e e o e e e o e e e e o e O@eom4m#O*Mhme 00000000 t O@eO*NmOOhhsomOOOOOOOO ee etmeR m ed MN A

M 00000000000@ @OO0700000 0000000090000000000000

$ OOOOOCCOOOOmOOOOOOOOOO C000000000000000000000 y 2 00000090 OOOheOOOOCOOOO \ 0000ODOS0800000 OOOOOOO n 4 OOO@OOOOOOO@OOODOO@@@@ v OOOOOOOOOO90D00000@@@@

W OO@h@O JOOOSE@OO@occh SN N O@@@@@@OOOOOOOOOOOh NNN

" K ONNEhve@eOONNOONP@DeO@ H ONNNNo>@@@@@@Os@@Pm@m=

@btot ehh o@DemOO@OO@Qdm I Dw m@t@mhNNhh> OehmOO9ee C @ePN7EdmeNome=NNOOcede i 0 e e e e e e e e e e e e e e e e e e e e e e Oe No ceNeOeN e@e@e @e @

e em eE e

@ee e= N eOeO e@e e.w. ee i

u NN@@@OmOmmm4memOOOOOOm NeeO@@m@@eNNmNmOOOOOOm l V = N mmmCC m m ON E4 i = . m i

N N t

i e 2 CCEECWEECOCNCE@@CGOEWC 4 ECCCE@CCCCCCCCOC@@ECOC l

m

@ e M e 4 I m W W @ @@@c > 0 W @ @@@c h he a C>@ e@COC=W>C t Cue 4@CCCmW>@

T =UW WC=mwJmomd; 34WGd i =U UC=m=JpC=JDD4WCW  %

5DC2 3Q m*JJJC4mdeWUYkKZ C. Z 4 mwJJJO4=J4JYVk32 9

= CCC i JJOCO@bc 4 1 6 t 1 8 1 0 0 I JJCoOBws 6 eil I i l 4 2 g?3>uC~CBW@Tga >>@>>>> 1 yZupuo~C@@@KJ77>>@>>>>

d *CWCCoe@>@co.34comococ I Io40Co@@>#cc334comoOOO

> vu >>WCe>>>>@p>>>oww>> t u v I n w W c e > > > > @ > > > > C e > >. >

3-2C

I . Om@@ tam._N._@@.m_.m-O. @h_m..mm.Pm__NamOO.O._

> d@COWCON Cm(@NOOPCN Om@@ @ Ok@@C@mkO@@@h@moom@@N I @dkke@PRNdOkeeONN@@ MON EmN>@@h DN@COh 40000@E*@

6 V e e e e e o e e e o e e e e e e e e e e e e e o e e o e e e e e o e e e e e e e e e e e eh PNdeh@Ne@cmNE@NPEmm@ h COPmemNPEeMoeNOOOmNmN N(Nm mak @h t@he@ emmF NMN4=@mm =NOeeh emm@NNNNmo m m i m I w Y

2

.h .-..mh ...whh..P.h.

m@NetON@Catk@@@@mefmNm Nm4mN DOENNN@EEO@OPmbPE PP I

- ..@..P.-.-......Om.h*

eCENmoNmem4t@mo@ OOHm@m

@hAmkOPkm>mNENON OOONOW PC@N@om@h@hdNEO@OOm@tE I

e @@mh @OmNe@eONNOmmmmmm@ l m fJ@hmNOtP@m@N@@ mmeckCW@ @NNcmOOMOCO@ePNNOce@mb 2 mW@Nmomm@@@@@m@@OONOO4 i

@memmO@@mNa@mP@@

NMOOMOO@e#4@mNmOOOOOOO don @mM e NeECO@@a@@@NO*OOOOOmOO e o e e e e e e o e o e o e e e o e e e e e

> e e e e e e e e e e o e e e e e e e e e e e O@@OmOmP@@@N=POOOOOOOO 1 ONNOchmee@@@NOOOOOOOOO m e Nm m@m@@ m i mm e #Ed>O m >@ ~4 m NQ mm I m m 0000000000000000000000 0000000000000000be4000 0000o000000000000OOOOD 000000 COOOOOOpoOO@OOOo t OOOOOOOoOOOOOOOOOCD000 0c00000000000000000000 D 00000000000000o0000000 i 0000000000000000000000 0000000000000000000000 I

@ 0000o000090C0000000000 1 OOOOOOOOOOOOOOOoE@OOOO 1 eCOOOOOOOOOOOOOONNDOOD OOOOOOOOOOOOOOO@@N@@@M OOoNOOOOOOOOoOOOhkCONm PmWWmOPOOOOON@memNDOO@ hhhmNO@OOOOON@m@OON@mm e e e e o e o e e e o e e e e e o e e e e e e e e e e e e e e e e e e e e e e e e o e e

@OOmNo@ mmkheheNOON@em .

NohNNNmmmNhkkk@NOO@ men m mCh @@N 'P@OfNM = l N@@ @NMOm@4 Cam m a C@ @@ = m We @@

I /

2 02 Se aW w 7.

N@N=OppehNeem@Odme@Pem emetPme@EOhNeemNmeN@O4

@meGebeh m@hCNPmeWPEmmo deNPOm@em@desh oNON@cmm O@dem@k@mNWNCeh@@@@NdN i

i I

mNedO@m@NmmohmeeOOr@ @h OmemNc4hEMPme@OOOOmhee NP(Mmhm@O#eNNao@ #0dme@

N@caboc@chPP@eOPOOPedh Nmpho@MMEP@@t@O*DOOOOk m&@N@@N@me@@mmN=Me@@mm OOONN@eNNNhmmmOOOpeeEC I

I C4 @EPOmm@wMPOMC=OCOO@mNP 4 kmO4 0@mPPONPMP@mOOl#MC amechh@@emOdmNmOOOOmOD me Oe O. O. O. Ne@e e eeOmEm@mmmOOwopo

>O i e e e e e e e e e e e e

@ e e e e e e e e o e o e e e e e e e e e e e i OmhOmmeteNNhcNDOOOOOOo ONmOm4DNmNd@OOOOOOOOOO m mm I

9 I @

W Z

w E

QW X Q mJ en 00000000o0000000000000 OOOOOOOOOOOOOOOOoOOOOo 0o00o00060C000000o0000 OOOOO90000000000o00000 OOOOOC 0000000o00000000 D

Z N

0000000000000000000000 OcocOOOOoOcoOOOoOOOOOO 00000000000000000o0000 000D00000000000000000C OOooooOOOOOOOOOOCOOOOD 4 e> CoOOOOOOOOOOoOOOe<OOOO A OOOOOOOOOOOOOOOcePOOOO I w K OOO@OOOOOOceDOOO@@Numm w eOOCDOOoOOOOOOOOookh On C NNOemOOOOOOO*ONCoOmO@@ C ONDe*OpcoOOoE*kOOOthhh e e e o e e e o e e o e o e e o e e e e o e e e e e e e o e e e e e e e e o e e e e e e Memo @@@@@ meceewCOOmmON metOmO@@eN@meMmmOOOOOm MN mm MPNNO N NN mm @NNOC T - == = == ==

m a Z

I 2

O C m

f OD@e000000000000000000 m OOOOoOOOOOOOOOOOOOO000

> wW C000o00000000000000000 >

e C0o000000000000000o000 o0000000o0000000000000

• Im 00000o0o00000000000o00 m ma OOOOooccooOOOOOOOOOOOO w D0000o00oo000000000o00

1. 24 0ocoo000000000000o0000 @ oo000000000o0000000000

=> C0000o00000o0000mPo000 OCocOcOOOOOboOOOPPOOOO E COOMOOOOOOoOOOO@mo@t N@ l OOOPOOOOOCoSOOO@cC@N@@

@ COO 4@@OOOOO@v@OOOJNeN I OOODE@@OOOOO@@eOOOmmma e e e o e e e e e e e e e o e o e e o e e o e e e e o e e e o e e e e e e e e e e e e e I mememOOPt4hmmmOOOOOOOm m @N NW

.1 NmNOmOO2@ewh omOOOOOOOm

= @M @e It il I CC am em Q4 2m 2 km @tNNPhmmmmhdPeeNPhmN C90dNomerNm4Oce*@mC@@@

DN&M@r@@@NN@@Pm@emEPCE h@@@ePPE@@@@mmmEPemmhm mmPmOC@PmmNmNac#mpPONO amOhmmePh@@c@@cOOm@@@ E.

o 6

6 6

4 I

@mmO@@e@@@ @@@N* MOO @eNN

<=NNmW =@ mode @@NNDON e@c

@memm@@* Chmch PNcOOv>=h m E m @ m W N > tda. C W N O P m O O @ d N N P a e P e m m s '* O h h N @ e @ O O N E O @

@ @@eEWCe 74NNakNNOO@*Pe e> @ m @ e th m > P d O E M N @ d e m m 4 N @ @ 4 cemmeNe m *e@mNeomOO@Mo@

ww WPOmW@cmeNmOONNNOommON 6

@ e @e ee e a teme hememe h e @e @ @ed emeo eO e= eN ea m e

ec . e e o e e e o e e e e e e e e e e e a e e e I omkOeOmhm@emmeOOOOOOOO

= NN mN e

1 O@CONNa@m@@hmOOOOOOOOO

mm =

0 '

m I

l T C000000000000000000000 I OOOOOOOOOOOOOOccOOcocc

@ 00000o0o000o0000000000 I OOOCOOOOOOOcceeOCCOOCO O 2 CocoOOcOOOccOCOoO@OoOO 9 c00000oo00000000000000 C e 00000COOooOcceOOcN000@ l OOO@OOOooOcocODOOOOOc@

w w @@O9@@@OoOOOOOON>m@c@N t @@@NDO@CcDoOOOO@OOOOON 4 I NNO@NOh @@@@@@@C@dCN@hm i h >Na@@m@@@@@ON ONPONO@m g Cacm=OmNNNkhWN@ OeNEmop t ec@h N@th= Ohm @mN= ooc @=4 I N e

3" e@@N@ON=EeCmNhEMODE@@@

e o e

• e e e e e o e e e e e e o e e e o e NNeO?"me*m@em*OOOOOOOm N = Ommh@

=

t a

s g

4 e

g Sten @NamC@EmmNNmOO@W@@

e e o e e e e e e e e e e e e e e e e e e e NGeo@@eOwmO@NN*OCOOOOm N = mM mEk I

4 4 e 2 ECEtttEEtt@E@t#4GtKKtt i EEttEtttTSEttt@@GtEEtt M i 4

I

@ 8 e

O I w @@@C 7 W w @ ###C > t @

• b J C*@ e@CCC=W>c 1 Ca# e@CCOmwwo C =vw VCmmwJ=C=43Dewce t =vw vomams-C=J334wCe 4 33 2 mm JJJO4=J4YvuwEZ l 5'2% mm JJJO4mJeYVWWK%

m CCC i sJoCC#ht t i 1 1 4 I 8 i 8 C6C i ssCCo@we e i t 1 1 4 1 1 3

s?cwvCmC@@@ZJg2**@>==>

Zo*CCC##>@CCDDeOC=CCoo t

e g?2nvC=C@@@rg22**#>>**

.o*Cocee>@cosD*CO=oCOC

> uvIwwwcape>>@www=CWwww wwIw>uce>>>>@p>>>C>>>>

I l

3-29

I 1979 H. B. Robinson - Nitrogen: phosphorous ratios I i Table 3.4.3 Average Phosphate Average Total Phorphorous Total Nitrogen . a t.io R

l A-2 Surface <0.01 0.23 greater than 23:1 A-2 Bottom 0.01 0.33 33:1 E-3 Surface <0.01 0.27 greater than 27:1 E-3 Bottom 0.02 0.26 13:1 G Surface <0.01 0.25 greater than 25:1 G Bottom 0.01 0.22 22:1 H Surface <0.01 0.24 greater than 24:1 I Surface 0.01 0.27 27:1 f

I I

I E

I' I

I I

I 3-30 I_

r . -.- _ _ . . . , .

= _ . . . - . - - . , . , . . , _ , _ , . _ _- . . . ~ . _ - _ , . . _ _ - _ _ _ _ _ __ _ _ _ _ _ _ _

I I

Table 3.4.4 Results of linear regression analyses of water chemistry data, 1975 to 1979.

I A-2 Bottom R' A-2 Surface R'

I Total suspended solids Total dissolved solids 0.134 0.228 Total solids Total volatile solids 0.236 0.247 Turbidity 0.102 Total suspended solids 0.115 Total sodium 0.106 Total dissolved solids 0.190 Total solids 0.339 Nitrate 0.437 Total volatile solids 0.373 Total orthophosphate 0.165 Total calcium 0.350 Total dissolved phosphate 0.400 I Total calcium 0.409 I E-3 Bottom R 2

E-3 Surfac<. R' Chloride 0.129* Turbidity 0.203 Total solids 0.267 Total sodium 0.132 Total volatile solids 0.267 Nitrate 0.495 Total dissolved solids 0.213 Total orthophosphate 0.218 I Nitrate 0.371 Tor.a1 solids 0.386 Total calcium 0.400 Total volatile sclids 0.379 Total suspended solids 0.165 Total dissolved solids 0.184 Total calcium 0.354 I

• Significant increase - all other parameters show significant decreases.

I I

3-31

I Table 3.4.4 (cont.)

G-Bottom R' C-Surface R'

I ,

Total alkalinity 0.179 Total alkalinity 0.215 Chieride 0.191* liardness 0.127*

Total solids 0.320 Total solids 0.268 Total volatile solids 0.231 Total volatile solids 0.147 Total suspended solids 0.189 Total suspended solide 0.170 Total dissolved solids 0.129 Total dissolved solids 0.163 Total codium 0.174 Turbidity 0.128 Nitrate 0.297 Total sodium 0.186 TOC 0.234 Nitrate 0.314 Total dissolved phosphate 0.424 Total dissolved phosphate 0.413 Total calcium 0.267 Total calcium 0.403 I

I-Surface ,R Total alkalinity 0.211 Total phosphorous 0.103 Total solids 0.259 Total volatile solids 0.154 Total suspended solids 0.140 Total dissolved solids 0.201 Total sodium 0.231 Total dissolved solids 0.216 (.45p)

Nitrate 0.367 Total dissolved phosphate 0.488 Total calcium 0.376

• Significant increase - all other parameters show significant I

decreases 3-32 I_

E U. 5. t

}- 2.5 kan I Point e Transact Q d

l T7.1t r .

Tre **ct E g

s Transee DA N \

T g

j g, . .

</

r t

. . , ,r. - -

i y

Trans.ct C N

a a

g Ash Pond \

I \ > ,

r....t .

' T'ensest A n a. notar.onit s*1 unm p /

0 '$ 1 2 9 ,j,0, g Kilometers (

b 2km I \ Point et Transact K meck cr..k I Figure 3.2.1 11.11. Robinson water temperature profile sampling stations.

3-33

1 5

1 I

@ 0@ @ @ @ @

) ,/

g l 10

&/XM N N

__ A s h\ I

\

!.0 6

N I N N I 0 _.

= "2 4 = .. -  : ,, ,,, \ I 12.0 l-

\ N L

0

@ @@ O @ @

@ I

-p>$,/r

,,. ) E g

10 -

8.0

[

a N I N

9.0 oEOn"[ ire.2,# :oun e 12.0 N N g

9 I I stuts Figure 3.2.2 IL B. Robinson 20C verticalisotherms (north to south), January and February,1979. -

3-34 g

a i

I @ O@ @ @ @ @

l E 10 m/] /'

\*'

~._

I l e, XQ'N s e /V -

I

= ' x s

I ,, _

x I = = ._. ,, N \

N m

~

, ,z.

I ee e

@ @ @e

/ < -

E 10 l _

I e-s X xy

.0 ,

I N

..o N -

I = : # ". . m 4 ,,, N,.

I ,zo u \

I . i stLES o

Figure 3.2.3 II. B. Robuuon 20C vertical isotherms (north to south), March and April,1979.

3-35 g

r I

1 0

@ O@ @ @ @ @

I,:

n N E

\

- 1 w

8.0

\

' 8

! N \

9.0

\ m m E Ne" Taw.- as*u rn. iiar i .

12.0 N'l %

I o

@ @@ O @ @

(

@ I

/

_ P -

l 10 g

- 5 y

1

. xs I N I 10 '

\

?"30"." ... , , \ I 110 '

i N N 3 9 l @

Figure 3.2.4 H. B. Robunon 20C verticalisothenns (north to south), May and June,1979.

3-36

_5

B

. I

@ 8@ @ @ @ @

l

- J[  % d .W

)

I 3.0 \

g

~

\

I 9 \ \

. x1 x f- \

8 9.0 x N NNa[Esw..:n.e e tez.eei l 12.0 N N I , @ '

@@ O @ @ @

.j J - J y s Q f-

\

~

- f sw sa a

- i, N w g,o _

/N N

w" -

\

I 'N _,

9.0 .

Usciun'cI$w..c.e : nos.rei

\

12.0 I 9 I mtzs 3

Figure 3.2.5 H. B. Robinson 2 C vertical isotherms (north to south), July and August,1979.

3-37

f Il I

O@ @ @ @ @

~ @

/j/ I I 6/x I

,3 I

- s

!u \ - .

g s

s N N g u N =

=:::nJ.:L = ,m., \ g Nm 3

@ O@ O @ @ @

l I

l /

3 ll w / l

- 4/ E 10

',N ' E 9

W r u _

\

E

\x N s 3

9.0 E*n"o's S.. zur e ouan 1'4 0 N \ I 9 I 3 I

an.rs E

Figure 3.2.6 H. D. Robinson 20C vertical isotherms (north to south), September and 3 October,1979.

3-38 l

e I

I

@ 8@ O @ @ @

.I ]h 10 I !

6.0 X \

Q o

g.o

\

N a

oYacEo":Eso.s ctes.s n a

I  %

110 I

o p/w/ /

.l

-xy

- -- in*

10 g

3*\

a I a

[. 6.0 I N 9.0

'

:: M *".r,s u,,,, \ -

'I 110

\ N 9 I  !

mates Figure 3.2.7 H. B. Robinson 20C vertical isotherms (north to south), November and December,1979.

3-39

OVERSIZE ,

DOCUMENT L PAGE PULLED SEE APERTURE CARDS i NUMBER OF OVERSIZE PAGES FILMED ON APERTURE CARDS I

~

9 t ulloo38-of APERTURE CARD / NARD COPY AVAILABLE FROM  !

RECORDS' AND REPORTS MANAGEMENT BRANCH

I d

g 4

W 8

T 1

J T.

h

)

4 se k

1 6 .

s.

1. ,

t b

.i h

1

': 3-40 4

M d

v - r e -v a , +-,e-,n 4-, w e - e rw< w e---e wsm wr mr e, r u w - - -m . m -c, w . e w w -e w-. --w w e ew im=, w s--- -s e- e% -w w,,w w +mw wr-n w.e,,-w<>w .-w, er www= ~w e s vw n - - w

- wr 4-en

~

N L OVERSIZE DOCUMENT PAGE PULLED SEE APERTURE CARDS .

NUMBER OF OVERSIZE PAGES FILMED ON APERTURE CARDS I

@ lIlllC O 3 8' O >

APERTURE CARD /HARD COPY AVAILABLE FROM RECORDS AND REPORTS MANAGEMENT BRANCH

s

& 4 - w + s u .a n.~ > J *#.2+ .--__ -a 42. ....--u,4 + .e.s.. .% .....a um aa. s.u h aww 6 --_r .u.a e 4.t e a ..aw a -. m mu4 . .a _a u ne . 4..xf 4.

b l-

+

f.

?

I 1

I a

t b

o T

3-41

)

} W ,

N-

) .

S

,e

,I I

/J/j /

\] 4 71 l / /,26 i \25

) 24) 20 i23f"2' .N 14A

'x31 g33 19 h 18 acg I 34 36' h7 1b -14

.J 35 M/ 9 p' [ h37 Jdi l ,

O UNITS 1 & 2 3 OlSCHARGE h391  %

40 I @ 3 9 J . 5, l 43 3 OlSCHARG \

)

g CAN A L.--

T'

• • G -l l .( n; l H 9. ROBINSON

\ #-b 3 '

47)

~

2 UNITS 1 & 2 --

[

0 c

.. ,I -

' I qug .

C LE Figure 3.2.10 H. B. Robinson littoral zone sampling stations.

3_m l

4.0 Fisheries s

P 4.1 Introduction a

Fisheries' studies in waters associated with the H. B. Robinson Steem l Electric Plant have been conducted by CP&L since 1973. Results through 1978 were included in a 316 Demonstration and a monitoring program report (CP&L 1976,1979).

The fisheries' saepling program conducted in 1979 was modified somcwhat from previous years and implemented following approval by the South -

Carolina Department of Health and Environmental Control (Tt.ble 2.1).

Ichthyoplankton sampling was conducted weekly from April through August, while most adult fish sampling was conducted on a quarterly banis.

Additional electrofishing was conducted during Septer ber and October to aid in evaluating 1979 fish reproduction. Rotenone sampling was con-ducted in four coves during August and impingement was sampled ou ran-domly selected dates within periods of historically similar (statist-ically) impingement rates.

This report presents the fisheries' data collected in 1979 and makes comparisons to previous years.

4.2 Fish Distributions in Robinson 1:apoundment 4.2.1 Introduction In 1979 surveys to determine the species of fish in the impoundment continued along with the examination of variations in numbers and species among locations. Comparisons also were made to previous years.

4.2.2 Methods Methods employed during the 1979 study period we c similar to those reported in previous studies (CP&L 1976, 1979). Sampling was conducted using gill nets, a 50-f t. bag seine, and electrofishing. Specifications and procedures for these sampling gears were presented in the 1976 4-1

I report, except that, as in 1977 and 1978, pulsed DC was used in elec-trofiching during 1979. Locations sampled included Stations 1 and 3 on Transects A, E, F, and G (Figure 4.2.1).

Species, numbers, lengths, and weights of fishes were recorded. Sex and maturity were recorded when possible. Larger fishes which were in good condition were tagged with Floy anchor tags and released. Catch rates have been adjusted to numbers and weights per 24-hour set for gill nets, to number per haul for seine catches, and number per hour for electro-fishing.

4.2.3 Results and Discussion Species Composition Common and scientific names of fishen collected frc:n Robinson Impound- g ment in 1979 and previous years are presented in Table 4.2.1. The B everglades pigmy sunfish represents an addition to the list along with several entries unidentified at the species level. Most of the uniden-tified specimens were forms'which were collected frequently and were normally identified to species; however, in some instances individuals could only be identified to the generic or f amily level due to size, mutilation, or state of decomposition. The unidentified pigmy sunfish 3 probably represents an undescribed form. The pigmy aunfish are very small forms which inhabit shallow areas of dense aquatic vegetation and are not very s,neptible to collection by the techniques employed. They W have most likely been present in the impc,undment but not collected previously.

Species collected in 1978 but not taken in 1979 include American cel, white catfish, brown bullhead, pumpkinseed, and swampfish. All of these have been collected sporadically and in low numbers in the past, and the g W

absence of most is not surprising. Only white catfish appear (from l

1974-1978 data) to be decreasing in the impoundment, and their absence may reflect a change in the population.

4-2 i B_

I Gill Netting The gill net catch per 24-hour set in 1979 is presented in Table 4.2.2.

Catch rates were small and variable and generally were smaller than were recorded in 1978. Seasonally, catches were largest during fall and smallest during the spring and summer. Fish diversity generally was greatest during summer and fall and was highest at Transect G, followed B- P; Transects F, A, and E respectively. Compared to previous years, tellow bullhead appeared to be increasing in most areas of the impound-ment. Catches at Transects F and G, and particularly Station G-3, were probably reduced by turtle predation during the warmer months.

I Transect G catches in 1979 were similar to previous years sampled in that, in all periods, Transect G exhibited the largest catches and E- greatest species diversity. Numbers caught, however, were lower in 1979 than in 1978 except at Station G-1 during the summer. Catches in both 1978 and 1979 were lorgest in the fall. The greater catch rate and diversity at Transect G (compared to other transects) has been cons s-tently observed. This is probably due to the "better" fisheries habi-tat in the upper impoundment area. This area is characterized by float-ing and submerged logs, stumps, and aquatic vegetation and is inhabited by more of the larger-bodied invertebrates (Section 6) which serve as I

fish food.

Gill net catches at Transect F were lower in 1979 than in 1978 except during the summer quarterly sampling. Diversity, however, was somewhat higher in 1979. Spotted sucker and yellow bullhead were the species taken most consistently in 1979, while chubsuckers were more cbundant in 1978.

E Transect E gill net catches in 1979 also were smallar than 1978 catches, and no fishes were taken at Station E-1 during the spring or summer.

I Chain pickerel and yellow bullheads were taken in greatest numbers, with pickerel collected during winter, spring, and fall and bullheads taken during summer and fall.

4-3 .

E h

I Catches at Transect A also were sn. aller than catches during 1978, but diversity was greater. Cateb+ i at Station A-1 were greater than at Station A-3, with the largest catch occurring at Station A-1 during the summer. Bluegill was the most frequently collected species.

Seining I

Seine catches ia 1979 were generally smaller than in 1978, but the I

previously observed patterns of largest catches and diversity at Tran-sect G, followed by Transect F, then Transect A, and smallest at Tran-sect E, were again observed (Table 4.2.3). The low catches at Transact E and Station A-3, as in previous years, were probably influenced by a bottom configuration (drop-offs and snags) that hampered seining efforts.

Largest catches at Transect G vere taken during the spring and summer, I

Catches were much lower during the fall and winter, reflecting movement k

out of the shallow shoreline areas during cooler periods of the year and I movement of fishes to deeper water as they grow to larger sizes. Chain pickerel, lined topminnows, bluespotted sunfish, dollar sunfish, and largemouth bass were the most abundant species collected.

Transect F catches were smaller than at Transect G but were more evenly distributed among seasons. The largest catches were made during the summer at Station F-1 and spring at Station F-3. Catches during the winter at both Stations F-1 and F-3, the spring at Station F-1, and the fall _t Station F-3 were similar. Chain pickerel and bluegill were the most abundant species collected.

Ne fish were collected by seining at Transect E except from Station E-1 during fall and Station E-3 during winter. This is probably the result of both inefficient seine sample collection (due to bottom configuration which results in variable seining success at established stations), and actual population .lifferences as fish were attracted by elevated tempera-tures during fall-winter and avoided elevated temperatures during spring-summer periods.

4-4 E_

I j I A acine collection made at Station A-1 during the summer included 55 bluegills and 10 swamp darters, in addition to chain pickerel and blue-I. spotted sunfish. With this exception, few fish were taken at that station.- The single fish collected by seining at Station A-3 during the spring is probably a function of a steeply sloping bottom, little cover, and inefficient seining, factors that probably also governed catches during all sampling perioda, rather than an absence of fish in the are.t.

The seining inefficiency at Transect f. and Transect A Stations has I remained consistent since regular sampling began in 1974 and has probably affected most samples collected.

Electrofishing I Electrofishing samples were collected from Robinson Impoundment during January, February, May, August, September, October, and November 1979 (Table 4.2.4). Greatest diversity was found at Transect G, followed by Transect F, with catches less diverse at Transect A and least diverse at I Transect E. The largest collections of an individual species during 1979 were for bluegills taken at Stations A-1 and A-3 during January and February. Other collections of note were the large numbers of golden shinera taken during September at Transect G and the small catches at Transect E during August and September.

Considering 1979 electrofishing collections on individual transects, Transect G catches were smallest during May and August and largest during September and Octobar. Chain pickerel, creek chubsucker, spotted I sucker, bluespotted sunfish, warmouth, bluegill, and dollar sunfish were collected regularly. Coupared to 1978 catches. Transect G catches were generally smaller in 1979. One exception is the abundance of golden shiners previously noted.

I Catches at Transect F in 1979 were generally smaller than in 1978, particularly during the winter, with the greatest dif ference observed in bluegill abundances. Species composition was similar to 1978 and to Transect G. As in 1978, catches were smallest during August.

I

{

1 I

I At Transect E, electrofishing samples were largest in January, February, and May. No fish were taken in August at either Station E-1 or E-3, and numbers were very small in September at Station E-3. Bluegill was the most abundant species taken, followed by largemouth bass, spotted sucker, chain pickerel, and warmouth. The reduced numbers and diversity during the summer months and greater diversity and abundance during the cooler months suggest seasonal attraction and avoidince related to the thermal discharge. It appears from a review of 1978 and previous data that bluegill abundance in the discharge area is decreasing.

Transect A electrofishing samples also were smaller in 1979 than in 1978. As in the past, bluegill was the dominant species collected, but numbers were much lover. Hybrid sunfish, bluespotted sunfish, and warmouth were collected regularly. Catch rates were highest in January and February and lowest in August. Largemouth bass were taken only in May.

The electroffshing samples collected in September and October, in addition to the quarterly sampling, were directed at evaluating reproductive success during 1979, particularly of bluegill. The fai' ee to collect small individuals in appreciable numbers while ichthyoplankton collections were similar to 1978 levels points to another year (as in 1978) with 5 E

recruitment (particularly bluegill) below that observed in 1975-1977.

To allow a more quantitative comparison of catch rates of selected taxa among sampling periods, years, and locations, we subjected a log trans-formatica of catch per hour to analysis of variance. When significant differences were indicated in effects of interest, a Waller-Duncan K ratio t-test was used to examine significant differences. The electro-fishing gear used was changed in January 1978 resulting in increased catch efficiencies during 1978 and 1979. This change in efficiency must be considered when evaluating results.

4-6 I

I

1 I  ;

)

i I l Comparisons of total catches by quarters, transect, and years all j I exhibited significant differences. Catches were largest in winter, lower in spring and f all (no significant differences between their) and )

smallest in summer. Catches were largest at Transect A, smaller at Tranaect C, and smallest at Transect E. Considering years, catches ranked in decreasing order were 1977, 1978, 1976, and 1979, with the 1979 catch significantly different from other years.

Total catches and catches of bluegill, largemouth bass, chain pickerel, and warmouth were tested for each quarter sampled since there were appreciable interactions in the overall analysis (Tables 4.2.5 and I 4.2.6). In all quarters (except spring 1977), the 1979 total catch was smallest of the 1976-1979 period. The ranking of catches during other years (and statistical differences) varied among quarters. The ranking of catches by transect considered on a quarterly basis was A-largest, G--intermediate, and E--smallest, except during summer when G was latger than A (E remained smallest) and during winter when Transect E was internediate. Statistical differences within these comparisons did vary by quarter (Table 4.2.6).

I Bluegill catch rates in all quarters were lowest in 1979, except during winter 1976. Bluegill catches were largest during all quarters at Transect A and intermediate at Transect E, except during summer. This summer reduction in Trancect E bluegill catches is probably an avoidance response to the thermal discharge.

Small numbers of largamouth bass, chain pickerel, and warmouth collected I and variable catch rates in many cases reduce the strength of the sta-tistical comparison. Largemouth bass catches were largest in the dis-charge area (Transect E) during fall and winter but lowest in the dis-charge area during spr'.ng and surmer. This too is probably an attraction and avoidance response to the thermal discharge. Chain pickerel and warmouth were most abundant at Transect G in all quarters.

I 4-/

I I

1 Ii l

4.3 Standing Crop Estimates 4.3.1 Introduction l Fish standing crops in Robinson impoundment were estimated again in 1979. These data allow location and yearlf comparisons incorporating )

the various factors affecting fish populations. As discussed in the previous reports (CP&L 1976, 1979), this method reflects the inherent i variability of changing physical and environmental conditions and of i I

varying efficiency of sampling.

4.3.2 Methods and Materials In general, the procedures previously reported for cove rotenone samp-ling (CP&L 1979) were followed in the 1979 study. Third-day pickups .

were made at Stations G-1 and G-4, while secead-day pickups were ade-quate at Stations A-1 and E-1 due to the warmer temperatures and more rapid rate of lecay. When large numbers of similar-sized fish of the same species were collected, 400 fish were measured (nearest mm) and the remainder counted and weighed. Fish too small to weigh individually were grouped.

4.3.3 Results and Discussion Standing crop estimates in the four coves samples during 1979 ranged from 10.4 kg/ha to 122.9 kg/ha. Numbers of fishes also varied greatly ranging from 247/ha to 36,735/ha. These biomass estimates were generally g similar to or larger than 1978 estimates except at the discharge (E-1) 5 cove (Table 4.3.1). Numbers, however, decreased in three of the four sampling locations (Table 4.3.2; Figures 4.3.1 - 4.3.4).

The 99% increase in numbers of fish taken at Station G-4 (headwaters) over 1978 was primarily due to golden shiners. Large increases in abundance were also seen in pirate perch, ironcolor shiners, unidentified 1

4-8 I_

L

~

L 61 r shiners, and yellow bullheads, while decreases were observed in numbers k of dusky shiners, blackbanded sunfish, bluespotted sunfish and dollar sunfish. Golden shiners were also the largest component of the biomass followed by warmouth, chain pickerel, and spotted suckers. The number, biomass, diversity, and species composition collected at Station G-4 was typical of the nabitat sampled and is similar to collections made in 1977 and 1978 considering normal year-to-year variation. The decrease in numbers of bluegill from 1977 through 1979 while weights remained :n similar indicates a larger average size and reduced recruitment of pung fish in the area (Table 4.3.3). h>

I The standing crop (biomass) of fishes at Station G-1 was similar in 1979 to that collected in 1977 and 1978; however, numbers exhibited a der.line from 1977 and 1978 levels. Standing crops of both numbers and biomass were larger in 1979 than in 1974 and 1975. A number of individual species followed the trend of increasing f rom 1974 and 1975 ta 1977 cr 1978, then decreasing in 1979 to levels similar to 1974 or 1975. Great-est changes from 1978 to 1979 vere a large increase in pirate perch and I dollar sunfish and decreaser in bluespotted sunfish and bluegfil. As at Station G-4, species composition and abundance are generally within the range of expected variation. The increasing average weight of bluegill (Table 4.3.3) suggests, as at Station G-4, a decline in recruitment of young bluegill to the population. -

Station E-1 standing crop estimates were the smallect of the stations sampled in 1979 and the smalles: recorded in sny sr.mpling year or loca-tion. Of the 247 fish /ha collected. redfin pickerel, chain pickerel, y pirate perch, warmouth, and bluegill nade up 68% of the total. Only redfin pickerel, chain pickerel, and golden shiner numbers remained the same or increased from 1978. All others decreased including a 957.

decline in bluegill numbers ar.d a 55% doc une in numbers of warmouth (Table 4.3.3). In terms of biomass, chain pickerel and yellow bull-heads increased from 1978 estimates while all others decreased. The 10.4 Kg/ha represents a 75% reduction from the 1978 biomass estimate.

" The numbers of fishes have decreased each succeeding year since the 4-9 l

J

I i

initial sampling (1974 and 1975) at Station E-1 (Figure 4.3.1), while biomass estimates declined severely only in 1978 and 1979. The popula-

r. ion structure at Station E-1 has also changed through the 1977-1979 period as evidenced by the increasing average weights of fish collected (Table 4.3.2) and a shif t in the length f requency distribution (Figure -

4.4.2). This shift to more larger individuals and/or reduced numbers of small individuals (young-of-the-year fish) suggests a lack of recruitment of young fish to the population in the area.

Numbers of fish collected by cove rotenone sampling at Station A-1 in 1979 were lower than were taken in any previous year (Table 4.3.2, Figures 4.3.1 - 4.3.4). Biomass estimates, however, were larger than in most other years, primarily as a result of increases in chain pickerel and spctted suckers, the largest component of the biomass (Table 4.3.1).

Other taxa contributing appreciably to the biomass estimate were creek chubsuckers and warmouth, which also increased over previous years, and bluegin, which exhibited a decrease. By numbers, bluespotted sunfish, chain pickerel, bluegill, and spotted suckers were the most abundant taxa. The numbers of both bluespotted sunfish and bluegill collected represent appreciable declines f rom previous years. The increasing average weight of bluegill in the louer impoundment (Table 4.3.3) and the continued shift in the length frequency distribution (Figure 4.4.1) 8 indicates a. shift to larger fish and suggests reduced survival of young g bluegill in the lower impoundment.

Regression analysis performed on cove rotenone sample data collected from 1974 through 1979 allows statistical ccmparison of changes among E years for each station. A log transformation of the number per area of E warmouth, oluegill, largemouth bass, and total cacch was used. Only 5 years were sampled and variation was relatively large, which must be considered when evaluating results. At Transect G differences among years were not significant for the groups tested. At Traiweet E all four groups exhibited significant decreases in numbers over the period.

Wermouth numbers did not change appreciably over the period at Transect A, and largemouth bass were taken in vetf low numbers. Bluegill and total catches exhibited significant decreases. The pattern of decrease in

+- 10 I_

I bluegill numbers should be noted since a quadratic fit (R = .99) and an examination of a plot of the data indicate increasingly strong declines in 1978 and 1979.

Overall, cove rotenane sampling indicates bluegill populations have declined in all areas of Robinson Impoundment in recent years with the moet severe de:.line in the mid and lower impcundment areas. With this I

exception, the fish s pulatica fn the upper impoundment and headwater areas appears reasonable in abundance and standing crop biomass of fishes. Year-to-year variations are within the normally expected range.

Although biomass estimates in the 1cuer impoundment area are reasonable and higher than in other areas and other years, the decline in fiah abundance is cause for concern. The shift in size distribution of bluegill indicateo reduced recruitment in the lower impoundment. The low numbers and biomass collected from the midimpoundment area indicate I

severe reductions in the fish populations and very little recruitment of young fish into the populations. The number of predatory fishes compared to the forage fish available also indicates a food supply stress on that segment ot the population.

4.4 Growth Studies and Size Distribution of Robinson Impoundment Fishe.T I 4.4.1 Introduction I As previously reported, the exnmination of scales is of little value in aging Robinson Impoundment fish. The 1979 report examined length fre-quency distributions and tagging data in evaluating growth. This sec-tion examines the length distribution of selected species in 1979 and updates the Robinson Impoundment fish tagging information.

4.4.2 Methods and Materials

.I Fish collected were measured to the nearest millimeter (total length),

and for those gear types where large numbers of fish were collected 4-11 I

l I:

and where collection was reasonably independent of size, frequency g

histegrams were plotted for species of interest. Rotenone sampling and bluegill in electrofishing samples were the only instances where these criteria were met.

Some fish tagged when sampling were recaptured after various periods at I

large. For each fish (species of interest), growth during the perici at large was divided by the number of days at large during the growing season (specified from examination of growth relative to dates tagged g and recaptured as of April 15-October 31 for bluegill, warmouth, and W 1argemouth bass and April 1-October 31 for chain pickerel). This value was multiplied by the number of days in the growing season to estimate yearly growth. These growth estimates and the length frequency histo-grams were used to evaluate fish growth in the impoundment.

4.4.3 Results and Discussion I

Bluegill Fish collected by rotenone sampling during August of 1979 at Transects A, E, and G were used in constructing plots of length frequency distributions.

These plots, Figures 4.4.1, 4.4.2, and 4.4.3, illustrate the available growth and population size distribution information. The small numbers of E E

bluegill collected make evaluation difficult, but it appears that few small fish are entering the population as evidenced by the continued shift toward a higher percentage of larger fish in the population. At Transect A fish ranging from approximately 90 to 120 mm exhibited the groa;est f requency of occurrence. This size, corresponding to sizes identified as Year 11 and older fish in previous years suggests almost no recruitment in 1979.

The number of bluegill collected at Transect E was even smaller than at Transect A. Also like Transect A, the highest frequency of occurrence was approximately 100 mm, and very few fish could be identified as young of the year. A more usual length frequency distribution was observed at Station G-1 with young-of-the-year fish ranging up to approximately 50 mm and second year and older fish ranging upward from approximately 100 mm.

4-12

I Comparisons of the length frequency distributions at Station G-1 from 1977,1978, and 1979 indicato eimilar young-of-the-year growth. Second-year growth was reduced in 1978 but was similar in 1977 and 1979.

Numbers of bluegill collected by electrofishing were insufficient to I evaluate growth from monthly changes in length frequency distribution.

No tagged bluegills were collected after sufficient periods at large in the growing seasons to estimate growth rate.

I Largemouth Bass I Largemouth bass were collected regularly from Robinson Impoundment, but numbers were insufficient to estimate growth from length frequency I distribution. The occurrence of juveniles 8-10 mm in length f rom mid-May through mid-July suggests spawning over an extended time period.

Largemouth bass were collected by rotenone e:tmpling only at Transect C, and their length frequency distributions also suggest spawning over an extended period with fish lengths of 40 mm-120 mm occurring with similar frequencies.

I No tagged largemouth bass were recaptured in 1979 after sufficient periods at large in the growing season to estimate growth rate.

Warmouth I Warmouth were not collected in large enough numbers to adequately esti-mate growth rate from length frequency distribution or size progression.

The size progression of warmouth collected by plexiglass larval trap and electrofishing indicates the values reported in the 1979 report (1977 I and 1978 data) are appropriate. Cove rotenone collections included a variety of sizes of warmouth only at Stat 1on G. Numbers of fish col-lected were relatively low when considering number adequate to examine length frequency distribution, but it appearn that groupings occur from approdmately 20 mm -45 mm and f rom 45 mm -81 cm. These sizes are the same as were identified in 1977 and 1978.

I 4-13 I

I

I No tagged warmouth were recaptured in 1979 after sufficient periods at large during the growing season to estimate growth rate.

Chain Pickerel I

Collections of chain pickerel in 1979 were insufficient to adequately evaluate growth from length frequency progression. Chain pickerel number > collected by rotenone sampling also were small and cize distri-butions somewhat variable, but the Transect G collection exhibited

-length frequency grouping at approximately 100 mm. The lengths of pickerel taken in 1979 were not as variable as in past years, and 100 mm growth for young-of-the-year chain pickerel in the upper impoundment is probably a good estimate.

Two chain pickerel that had been at large for periods within the defined growing-season were recaptured in 1979. One individual, tagged at 253 mm (TL) and 82 , grew at a rate of 64.5 mm and 86 g per year, while another indP aal, tagged at 285 mm and 122 g, grew at a rate of 10.8 mm and ' 3 per year. Both fish were tagged and recaptured in the vicinity of Transect F.

4.5 Fish Reproduction in Robinson impounduent 4.5.1 Introduction E Ichthyoplankton sampling during 19/9 was modified to place greater emphasis on periods of reproductive activity documented in previous years with a corresponding decrease in periods of low reproduction activity. Weekly sampling was conducted from April through August.

Also, two dates were 9ampled in November and February to allow continued quarterly comparisons.

4.5.2 Methods and Materials The larval fish traps used were plexiglass funnel traps previously described (CP&L 1976) and are similar to those described by Ricker (1968). Stations sampled (Figure 4.2.1) were the same as sampled during 1978 (CP&L 1979).

4- 14

I l Open-water ichthyoplankton sampling also continued with 0.5m push nets at the stations and with the methods employed in 1978 (CP&L 1979).

I 4.5.3 Results and Discussion I Shoreline Areas Sampled With Larval Fish Traps I The plexiglass larval fish trap sampling program chan2cd each year from 1976 through 1979 as the program was improved and refined. These changes, however, still allow a statistical comparison of catch rates during quarterly sampling periods of 1976, 1977, 1978, and 1979 for Transects A, E, and G. Additionally, weekly catch rates at Transects A, E, and C vere compared during 1977, 1978, and 1979 during periods of increased reproductive activity. These c.nalyses have been performed on a log transformation of total catch per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and the catch per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of Lepomis, percids, and catostomids.

I To examine temporal distributions in 1979, weekly mean catch per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> was calculated for Transects A, E, F, and G (Table 4.5.1).

During January and February larval fish trap catches were small at all transects. Most individuals collected were juveniles, and darters were the most abundant taxa. Catches increased slightly during April and increased greatly during May and June when the maximum catch rates for I the year were recorded. During April, Etheostoma, Minytrema, and Notemigonus were the most abundant taxa, while during May and June Lepomis was the most abundant taxonomic group. Also during May and June Minytrema, Erimyzon, and Notemigonus increased to their maximum abundance, then declined. Catch rates of Enneacanthus, which initially increased during April, remained similar through the May-June period into July and declined near the end of August. Lepomis catch rates were lower in July than in May and June, but Lenomis generally remained the most abundant taxa collected until late August. In November, catch rates were low and

-I consisted primarily of juvenile swamp darters.

4-15 I

I

I I

Comparisons of quarterly catch rates of selected groups (total, Lepomis, ,

Catostomidae and Percidae) in 1976, 1977, 1978, and 1979 indicated different patterns of abundance. Initially, the data were subjected to 4 analysis of variance with all treatment effects (and appropriate inter-actions) considered. In some cases severe interactions among effects or g much larger catches at a particular area or time made a further parti- W tioning of the analysis desirable.

Analysis of total catches exhibited significant interactions, and the much larger catch at Transect G suggested analysis by transect was appropriate. In the Transect A analysis of total catch, significant differences among quarters were indicated with largest catches (not significantly different) in spring and summer. At Transect E total t catch rates exhibited significant quarter and station dif ferences with largest catches occurring during the spring and at Station 1. Total B'

5 catches at Station G exhibited year and quarter differences and a sig-nificant year and quarter intetaction. This apparently resulted from a different pattern among years during different quarters. During the j highest catch rate periods (spring and succ.er), means decreased from 1976 to 1979 to 1977 to 1970 and from 1977 to 1979 to 1976 to 1978, respectively.

Considering catches of Lepomis, the nature of the interaction involving transects and the much larger catches at Transect G aCain suggested an analysis for each transect was appropriate. In the partitioned analysis, Transect A exhibited no significant difference in catches among years or between stations, while there was a significant quarterly difference with largest catches during summer followed by spring and essentially no Lepomis taken during fall and winter. Lepomis catches at Transect E exhibited a significant station difference with the Station 1 catch larger than Station 3. At Transect G there was a significant difference among sampling years with the catches during 1977 and 1979 similar and  ;

larger than the catches during 1976 and 1978.

As indicated in Table 4.5.1, percid catches were generally small and variable, but percids were taken during mosc periods of the year. The analysis of variance of percid catches indicated significant differences '

in catch rates among transects and quarters, and the interactions indicated 4-16 l

I analysis should be performed on the catch from each quarter separately.

In the subsequent analysis, winter catches of percida exhibited signifi-cant station differences with the catch at Station 3 larger than the catch at Station 1 but no transect or year differences. During spring, significant dif ferences among transects were indicated with the catch at I. Transect G significantly higher than at the other locations. Summer catches also exhibited signifier at dif f erences among transects with the catch at Transect C largest but not significantly diffarent from the catch at Transect A and the catch at Transect E smallest but also not significantly dif f erent f rem "'ransect A. Percid catches in fall exhibited significant dif ferences among years with the largest catch taken in 1978.

Catostomids were taken in larval traps in numbers adcquate for statisti-cal analysis only at Transect G during spring. Considering those catches, I a significant difference was indicated among years with catches decreasing from 1976 through 1979. However, there was no significant difference between 1976 and 1977 or among 1977, 1978, and 1979.

The analysis of catch rates during periods of high r roductive activity reduced the variation in the analysis by reducing the amount of time (number of samples) considered in the analysis which had low catch rates.

I However, due to the changed sampling schedules over the years, 1976 data were eliminated from the analysis. Lecomis catches during the 1977-1979 period indicated a significant difference in catch rates among transects and sampling weeks but no significant difference among sampling years.

Further analysis indicated the catch at Transect C was significantly larger than the catch at Transects A and E, which were not significantly different. Variations in catch f rom week to week reflected natural spawning variation within the spawning season. Percid catch analysis indicated significant transect and station differences with largest I catches at Transect G and at Station 3. No significant differences among years were indicated. Catostomid catch analyses also indicated significant transect differences, with the largest catch at Transect G and no year or station differences. The analysis of total catch rates indicated significant transect and year differences with largest catches at Transect G and during 1979.

I 4-17 I

I Open-Water Areas Sampled with Ichthyoplankton Nets catch rates of ichthyoplankton in push nets in 1979 varied among species and locations (Table 4.5.2). The most abundant taxa collected included golden . shiners, suckers (primarily spotted suckers), sunfish, and darters.

Other collections of interest include pickerel taken in January and February, pirate perch taken in late April, largemouth bass taken in April, May, and June, and yellow bu11 heads taken in May, June, July, end August.

Total catch and the catch of sunfish, darters, and suckers were analyz.ed statistically using analysis of variance and least significant differen 7 3

performed on a log transformation of catch per 1,000 m . To make the analysis more meaningful, sampling pericds considered were restricted to reflect main periods of spawning activity: percids May e d June, all other groupings May through August. Effects consiO cod included sampling veek, sampling period (day or night), sampling tr asect, esmp3.ng year and the appropriate interactions.

Total catch rates exhibited significant dif ferences among sampling weeks and sampling periods (day / night). Night catches were larger than day .

catches and examining catch rates through the year (Table 4.5.2), catches began increasing in early April, reached a maximum in June and July, and E decreased in August. Among sampling locations the total catches at 5

Transact G were significantly larget than at any other location (Table 4.5.3). Transect F catches vere smaller than at Transect G but were significantly larger than at Transects A and E, which were not statistically different.

Lepomis (sunfish) catches exhibited significant differences in catches among weeks, periods, transects, years, and in the transect-by-year interaction. Leponis (Table 4.5.2) were taken from May through August with highest catches in June and July. Extremely large catches the weeks of May 20, June 10, July 1, July 8, and July 15 are typical of 4-13 I

a_

centrarchid reproduction with several periods of activity. It should be noted that the plant was off-line during most of this period, resuming operation in late July. Night catches of Lepomis were greater than day I catches, and catches (locations combined) were greater in 1979 than in 1978. Transect G catches were significantly larger than catches at other I locations, and catches at Transect F were smaller than at Transect G but were significantly larger than at Transects A and E (Table 4.5.3). The interaction in the transect-by-year effect of the analysis of variance was due to a slight decrease in catch rate from Transect A to Transect E in 1978 and a slight increase from Transect A to Transect E in 1979.

Catches of darters in push nets exhibited no significant dif ference in

.I catches among weeks or between periods , bt.t the week-by-period inter-action was significant. Also, the a.alysis indicated significant dif-farences in catches among transects and between years. To examine the week-by-period interaction, the data vere plotted and there does not appear to be a consistent pattern in day-night differences among the two years with fluctuations throughout the sampling period. Catches at all transects were significantly different from each other (Table 4.5.3) and the catch at transect G was largest, followed by F, followed by A, and the smallest catch at Transect E. Over the sampling period, 1979 catches I were greater than catches during 1978.

Sucker catches exhibited significant differences in catches among weeks, transects, and years, but differences between periods and in the inter-action terms were not significant. Considering weekly catches (Table 4.5.2),

densities of sucker larvae began increasing in early April and reached a peak the first week of May. Densities decreased in following weeks to I very low densities collected in late June and July. The last collection containing sucker lanae was made the week of July 22. Catches at Transect G were significantly larger than catches at any other transect.

Transect F catches were second in abundance and were significantly different from catches at all other transects (Table 4.5.3). Catches at Transects E and A were not significantly different. Overall, sucker catches were significantly larger in 1979 than in 1978.

4-19 I  ;

I 4.6 Ichthyoplankton Entrainment 4.6.1 Introduction Entrainment sampling frequency followed the same schedule as ichthyo-plankton sampling efforts in the impoundment. All catches have been 3

adjusted to a standard volume (1,000 m ) for comparison, but when com-paring 1979 data to data collected through 1978, the changes and improv-ements in the program must be kept in mind when evaluating results.

4.6.2 Methods and Materials Sampling during-1979 followed the procedures described for sampling in 1977-1978 (CP&L 19) . A frame fitted with 30 cm ichthyoplankton nets with flowmeters wcs lowered into the intake bay for sample collection.

Although the flowmeters suggest there was some turbulence and variable flow, this method was thought to provide representative samples. Also, usir.g the frame, replicate samples were collected simultaneously.

4.6.3 Results and Discussion During 1979 Lepomis and percids were the only taxa collected by entrain-ment sampling. Percids were taken in low numbers during most periods, B

while Lepomis were taken from late May through August (Tablo 4.6.1). g Percid abundance was greatest during June, with the largest collections made during the first twe weeks. Most of the percids coll.ected were thought to be swamp dartees cince some of the larger individuals collec-ted could be identified as that species. Also, most adult darters collected in Robinson hpoundment (particularly the lower impoundment area) were swamp darters.

I The pattern of low, variable catches of percids during winter and summer is similar to that cbserved in the past (1978). The absence of ichthyo-plankton in November (1979) contrasts to the 1978 catch which exhibited a fall pulse. Another difference between 1979 and past years was that the density of June catches of percids during 1979 was several times higher than was previously recorded. The magnitude and temporal distri- g bution of 1979 Lepomis entrainment was similar to that observed in the W past. g 4-20 g w I

I I Comparing ichthyopla iton entrainment to push net catch rates, entrain-ment . * . : were generally several times inwer.

I 4.7 Fish Impingement at the H. B. Robinson Steam Electric Plant 4.7.1 Introduction I The impingement sampling f requency in 1^79 was developed from an analy-sis of 1974-1978 impingement data. Sampling una conducted s2ch that impingement rates were represented throughout the year, and both seasonal and yearly comparisons could be made.

4.7.2 Methods and Materials I Impingement sampling procedures for 1979 were the same as were described

' previously (CP&L 1976). Basically, samples were collected from the traveling intake secreens after a known period of time (usually approxi-mately 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) and the fish examined. Catch rates were adjusted for

< I sampling time and reported as number of fish impinged per day (24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />).

Sampling periods, or strata, vere defined from a stastical analysis of 1973-1978 impingement data, indicating periods when impingement rates were not significantly dif ferent between weeks. Sampling within these periods allowed an estimation of impingement rate for that period.

Periods were defined as Period 1, Januar/, February. March April, May, June, October, November, and December; Period 2, July; Period 3, August; Period 4, September.

I 4.7.3 Results and Discussion Results of 1979 impingement sampling are presented in Table 4.7.1 for Units 1 nnd 2. As in the past, numbers and weights of fishes impinged on the Unit 1 intake screens were very sma11 averaging 5 fish per day 1

through most of the year. The dominant species collected was bluegill, the most abundant tax 2 in the lower impoundment.

4-21 I

J

Unit 2 impingement rates were larger than Unit 1, but rates were low compared to impingement rates in previous years and to impoundment fish populations. As on U.:it 1, bluegill was the major component of the '

catch numerically. Chain pickerel contributed appreciably to the biomass i of fish impinged through a small number of large individuals. Total impingement rates (all taxa) on the Unit 2 screens averaged approx 1-mately 55 fish per day over the year.  !

The reduced numbers of fish in Robinson Impoundment discussed previously is probably (*s.e major cause of reduced impingement rates over past years. It is not believed thet impingement has been a factor contributing to the reduction in fish populations. ,

4.8 Habitat Management The buoys marhing the two artificial reef areas installed during 1978 I

were checked periodically. Several local residents indicated they were using the shallow reef and were catching largemouth bass and chain pickerel from the reef area. A letter was received from the president of the Hartsville basa club indicating their interest in the reef program.

They also indicated they have been successfully using the reef areas.

A letter received from Mr. Dan Crochet of the South Carolina Wildlife and Marine Resources Department indicated their inspection of the reefs indicated little fishermen or fish use.

At this time CP&L is planning to maintain the reefs by the addition of brush during 1980. Since the letter from the Hartsville Bass Club indicated an intecest in expanding the reef program and an interest in developing a cooperative construction effort, reef programs are being reevaluated.

4.9 Miscellaneous Observations and Activities Defomed Bluegills As reported for l?77 and 1978 collections (CP&L 1979), " deform fish l (primarily bluegill) were again collected from Robinson impoundmenc.

1 4-22 B_

a. .-- , = . - __ _ _

2i These fish appeared to have a deprcssed or indented operculum and in severe cases deformed gill arches. Another less common deformity involved the mouth and occurred in fish both with and without the deformed operculum. The mouth deformities ranged from slightly mal-I f ormed mandibles to a reduced, twisted, immobile orifice.

The incidence of deformed bluegills in Robinson impoundment increased in 1979. Several bluespotted sunfish and hybrid sunfish were also collected that exhibited the same type of deformity. The incidence of deformed fish collected by electrofishing was greatest in the midimpoundment area (Table 4.9.1) and lowest in catches from the upper impoundment.

I A study is in progress to evaluate possible causes of this deformity.

Fish Movement Studies I Tish tagged and recapturad during the study provided informatica on fish movement as well as growth rate. In addition, fishermen returning tags I from Robinson impoundment fish were asked to mark a L'n with the catch locations.

Six tags were returned by fishermen with completed catch informati<m ,

and eight fish were recaptured during scheduled sampling. Bluegill were recaptured after 1 to 3 months at large. Two blueg131 were recaptured at the tagging location, one moved across the fanpoundment and one moved downstream approximately 1.6 km. Two warmouth were recaptured at their taggi.ng location after 3 months and 15 months at large. Three chain I pickerel were recaptured at their tagging location 1 to 6 months after tagging. One pickerel, however, moved from Transect F (above the SC 346 bridge) south through the impoundment across the dam, down Black Creek,

[

through Prestwood Lake, and was caught at the Prestwood Lake dam, a distance of approxhnately 16 km. This fish was at large approximately

! 2 years. One recaptured largemouth bass moveu approximately 3.2 km south over a two-month period, while two others, at large 1 month and over 1 year, were recaptured near their tagging locat. ion. One yellow l

bullhead was recaptured after 2 months at large at the tagging location.

I 4-23 I

1

I I

4.10 Discussion of Thermal Effects Detarmining the eff ect of the thermal discharge f rem the H. B. Robinson I

Steam Electric "lant on the fish in Robinson impoundment has been a main objective of these fisheries' efforts. The problem has been approached by investigating the reservoic fishery as a whole and examining and g comparing various areas with ea:h other, with historical data, t.nd with 5 other bodies of water. Specifii: t mperature limitations hsve been addressed previously (CP&L lett.tr to Mr. Jack Pavan, EPA, December 13, 1976, Exhibit A) and a comparison of these specific temperatures to reservoir temperatures is somewhat misleading, given a fish's ability to move and the microhabitats present which are affected by cool springs and temperature gradients in deeper areas. The population changes raported in this report are thought not to result from the existing temperature regime since changes have af f ected both thermally influenced areas and areas where thermal discharge rarely affects sabient tempera-tures. Also, discharge temperatures during the period June through September in the years 1977-1979 generally have not been as severe as thoce recorded in previous years (see Section 3.2).

I I

I I

I I

g 4-24 I

I E

i 4.11 Summary Fisheries studies in 1979 were designed to continue the evaluation of fish populations in the !!. B. Robinson irepoundment. The results were I

compared to past years to aid in evaluating ef fects of the 11. B. Robin-son Steam Elect'cic Plant on the biota of the Robinson impoundment.

In 1979 two taxas not previously reported were collected. These were the everglades pigmy sunfish and an unidentified pigmy sunfish. These forms inhabit dense vegetation and probably were present in the past, though not collected because of low susceptibility to the sampling gear employed. Several species reported in the past were not taken in 1979.

ibst of these were collected sporadically in the past and their absence from the 1979 collections is not surprising. White catfish had pre-

-I viously been reported to be decreasing in the impoundment and were not collected in 1979.

Gill net catch rates in 1979 were small and variable and generally were smaller than were recorded in 1978 (CP&L 1979), when catches were simf Jar to thotse in 1974 and 1975. Seasonally, catches were largest during f all and smallest during the spring and summer. Fish diversity was highest at Transect G, followed by Transact F, and was generally greatest during the summer and fall. Compared to previous years, the yellow bullhead appeared to be increasing in most areas of the impoundment.

Seine catches in 1979 also were generally smaller than in past years, but again catches were variable. The previously observed patterns of largest catches and diversity at Transect G, followed by Transect F, followed by Transect A, and smallest at Transect E, were again observed.

As in the past years the much smaller catches at Transects E and A were I probably influenced somewhat by a bottom configuration (drop-off s and snags) that hampered seining efforts.

Electrofishing samples collected from Robinson Impoundment indicated the greatest diversity at Transect G, followed by Transect F, with catches 4-25 I

.- =-

less diverse at Transect A and least diverse at Transect E. Largest collections of individual species during 1979 were bluegills taken at Stations A-1 and A-3 during January and February. Other collections of  ;

note were the large numbers of golden shiners taken during September at l Transect G and the small catches at Transect E during August and September.

It appears from a review of 1978 and previous years' data that bluegill j abundance is decreasing. The failure to collect small individuals in l

appreciable numbers during Septt.uber and October indicates another year (as in 1978), with recruitment of young fish (particularly bluegill) to the populations below levels observed in 1975-1977.

Electrofishing catch rates of bluegill, largemouth bass, chain pickerel, and warmouth also were compared statistically (Tables 4.2.5 and 4.2.6).

Catch rates of bluegills in 1979 were lowest of the years tested in all quarters, except during winter 1976. Bluegill catches were largest during all seasons along the dam and intermediate in the discharge area (except during summer). This summer reduction in discharge area blue-gill catches is probably an avoidance response to the thermal discharge.

Largemouth bass catches were largest in the discharge area during fall and winter but lowest in the discharge area during spring and summer.

This too is probably an attractive and avoidance response to the thermal discharge. Chain pickerel and warmouth (during all periods) were most abundant in the upper impc"ndment. Total catch data over the year E E

exhibited significant quarterly, transect, and yearly differences.

Catches were largest in winter, lower in spring and fall (no significant g difference between them), and smallest in summer. Catches during all M quarters combined were largest at Transect A, smaller at Transect G, and smallest at Transect E. Considering years, catches ranked in decreasing order were 1977, 1978, 1976, and 1979, with the 1979 catch significantly different from other years. Total catches were also tested statistically for each quarter sampled since there were appreciable interactions in the overall analysis. In all quarters (except spring 1977), the 1979 total catch was smallest of the 1976-1979 period. The ranking of catches during other years (and statistical differences) varied among quarters.

The ranking of catches by transect considered on a quarterly basis was g 4-26 I

A-large s t , G--intermediate, and E--smallest, except during summer when G was larger than A (E remained smallest), and during winter when Tran-sect E was intermediate. Statist 4 cal differences within these compari-sons did vary by quarter (Table 4.2.6).

I Standing crop estimates in the four coves sampled during 1979 ranged from 10.4 kg/ha to 122.9 kg/hr.. Numbers of fishes also varied greatly

ranging from 247 per ha to 36,735 per ha. Comparing the 1979 biomass estimates to 1978 biomass estimates, values in 1979 were generally I similar or larger except at the discharge (E-1) cove (Table 4.3.1).

Numbers, however, decreased in three of the four sampling locations (Tabic 4.3.2). The number of fish taken at the other location (Station G headwaters), increased 99% over the number taken in 1978 due primarily to the large increase in numbers of golden shiners.

< Standing crop data collected from 1974 to 1979 were compared for changes among years for each station. Species considered were warmouth, bluegill, largemouth bass, and total catch. At Transect G differences among years were not significant for the groups tested. At Transect E all four groups exhibited significant decreases in numbers over the period.

Uarmouth numbers did not change appreciably over the period at Transect A, and largemouth were taken in very low numbers. Bluegill and total catches at Transect A; however, exhibited significant decreases. The pattern of decrease in bluegill numbers is of particular note since the data indicate increasingly strong declines in 1978 and 1979.

I Overall, it appears that cove rotenone sampling indicates bluegi~!

populations have declined in most areas of Robinson Impoundment in i recent years with the most severe decline in the mid and louer impor.nd-ment areas. With this exception, the fish population in the upper impoundment and headwater areas appears reasonable with the expected abundance and standing crop biomass of fishes and with year-to-year

]

variations within the normally expected range. Although biomass esti-mates in the lower impoundment area are reasonable and higher thar. in

,g E some other areas and other years, the decline in fish abundance is cause for concern. The shift in size distribution and the increase in predator I 4-27

)

and young fishes suggest reduced recruitment of young fishes to the population in the lower impoundment. The low numbers and biomass collected from the midimpoundment area indicates severe reductions in

=

the fish populations and very little recruitment of young fish. The number of predatory fishes compared to the forage fish available also indicates a food supply stress on this segment of the population. .

The discrepancy between the abundance of sunfishes in ichthyoplankton sampling gear and the paucity of young bluegills in cove rotenone and electrofishing sampics suggests that bluegill were spawning successfully in the impoundment but that many of t he young fish did not survive through the summer of 1979. This occurred even though water temperatures -

during the period June to September were lower than the same period during 1975-1978 (Table 3.2.3, Pg. 3-15).

I The pattern of low, variabic entrainment of percids during winter and summer is similar to that observed in the past (1978). The absence of ichtyoplankton in the fall (1979) contrasts to the 1978 catch which exhibited a fall pulse. Another difference between 1979 and past years was that the density of June catches of percida during 1979 was several times higher than was previously recorded. The magnitude and temporni g distribution of 1979 Lepomis entrainment was similar to that observed in 5 the past. Comparing icthyoplankton entrainment to push net catch 5

rates, entrainment rates were generally several times lower. g '

As in the past, numbers and weights of fishes impinged on the Unit 1 intake screens were very small, averaging 5 fish per day through most of the year. The dominant species collected was bluegill, the most abun-dant taxa in that area of the impoundment.

Unit 2 impingement rates were larger than Unit 1, but rates were low compared to impingement rates in previous years and to impoundment fish populations.

As we reported for 1977 and 1978 collections, " deformed" fish (primarily bluegill) were egain collected from Robinson Impoundment, These fish appeared to have a depressed or indented operculum and in severe cases 4-26

deformed gill arches. Another less common defomity involved the mouth and occurred in fish both with and without the deformed operculum. The mouth deformities ranged from slightly malformed mandibles to a reduced, tutsted, immobile orific.e.

I The incidence of defomed bluegills in Robinson lepoundment increased in 1979. Several bluespotted sunfish and hybrid sunfish were also collec- -

I ted that exhibited the same type of deformity. The incidence of deformed fish collected by electrofishing was greatest in the midimpoundment area (Table 4.9.1) and lowest in catches from the upper impoundtent.

The populations change of primary importance appears to be the failure of young fish (from the 1979 spawn) ta be recruited to the population.

I This failure is evident in the length frequency distribution of blue-

^

gills, the increase in bluegill average size (in cove rotenone samples),

the low numbers of bluegill in fall electrofishing sampins and the I reduced numbers of young of the year fish impinged on the plant intake screens while ichthyoplankton sampling exhibited little change. The continued occurrence of deformed sunfishes (primarily bluegill) is a).so of concern. The causes of these occurrences is unknown, but will con-tinue to be investigated in 1980.

I I

I t'

B I

o

I I

t. 11 FIFEPINCES I'

CP&L 1976. H. B. Robinson Steam Electric Plant 316 Demonstration Volume II. 238 pp.

l

. 1979. H. B. Robinson Steam Electric Plant 1976-1978 Environmental Monitoring Program Results. Volume II.

Ricker, W. E., 1968. Methods for Assessment of Fish Production in Fresh Waters. 1.B.P. ilandbook ho. 3, Blackwell Scientific Publications. Oxford. l l I I I E

I l

I I

I t

I 4-30 l.

I l

= - _. -. --__ . . _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

W M m M m M M M M M M M M m' m mR Table 4.2.1 Common and scientific names of fishes collected from Robinson Impoundment 1974-19'/9.

Scientific Name 1974-1975 1976 1977 1978 1979 Common Name Anguilla rostrata X X American eel X X X X Am'a calva X Bowfin X X X X Umbra pygmaea X Eastern mudminnow X X X Esox americanus X X Redfin pickerel X X X X X Chain pickerel Em3 . ger X

Unidentified pickerel Esox sp.

Notemigonus chrysoleucas X X X X X Golden shiner X X Notropis chalybaeus X X Ironcolor shiner X X X X X Dusky shiner ,Notropis cummingsae X X X Unidentified minnow Cyprinidae Erimyzon oblongus X X X X X Creek chubsucker X X Erimyzon sucetta X X X Lake chubsucker X X X

,Minytrema melanops X X y Spotted sucker X X X X X 2, Unidentified chubsucker Erimyzon sp.

X

"' Unidentified sucker Catostomidae X X X X White catfish Ictalurus catus X X X X X Yellow bullhead Ictalurus natalis X X Brown bullhead Ictalurus nebulosus X X X X X Flat bullhead Ictalurus platycephalus X X X Tadpole madtom Noturus gyrinus X X Unidentified madtom Noturus sp.

X Unidentified catfish Ictaluridae X X X X Swampfish Chologaster cornuta X X X X X Pirate perch Aphredoderus sayanus X X X X X Lined topminnow Fundulus lineolatus j X X X X Mosquitofish Cambusia affinis X X X Acantharchus pomotis X X X l Mud sunfish '

Centrarchus mgeropteras X Flier X Everglades pigmy sunfish Elassoma evergladel X X X X X Banded pigmy sunfish Elassoma zonatum X Unidentified pigmy sunfish Elassoma sp. l X X X X X i Blackbanded sunfish Ennescanthus chaetodon X X X X X Bluespotted sunfish Enneacanthus gloriosus X X X Unidentified banded sunfish Enneacanthus sp.

e . .

Table 4.2.1 (cont 5nted)

Conm.on Name Scientific Name 1974-1975 1976 1977 1978 1979 Redbreast sunfish Lepomis auritus X X. X X X Pumpkinseed f.epomis gibbosus X X X X Warmouth _Lepomis gulosus X X X X X Bluegill Lepomis macrochirim X X X X X Dollar sunfish Lepomis marginatus X X X X X Redear sunfish Lepomis microlophus_ X X X X Largemouth bass Micropterus salmoldes X X X X X White crapple Pomxis annularis X ~

Black crappie Pomoxis nigromaculatus X X Sunfish bybrid Lepomis sp. X X X X X Unidentified sunfish Lepomis sp. X X X o Swamp darter Etheostoma f us i J .,rme X X X X X b

Tessellated darter Etheostoma olmstedi X X X Sawcheek darter Etheostoma serriferum X X X X X Unidentified darter Percidae X X X X lm m M M M M M M M M M M M M M M

I Table 4.2.2 Fishes collected with 100 ft. erperimental gi.11 outs !re?

Robinson Impoundment during 1979 hiuitber per J4-hour set from mehr. of two consecutive sets pe.r quarterb Winter Spring Summer Fall tunter Spr1nejfdNU~

7 Fall _

Transect A Station A-1 Stetic.n A-1 Chain pickerel .5 Yellow bullhead .6 .6

.5 .6 Pirate perch Warmouth Bluegill 1.0 .5 .8 I Largemouth bass TOTAL .5 1.0 1.3

.3

.6 .6 .S .6 0 Transect E Station E-1 Station E-3 I Chain pickerel Spotted sucker

.5

.5

.5 1.5 Yellow bullhead .6 1.1 Pirate perch .6 .6 Warmouth .5 TOTAL .5 0 0 1.2 1.1 1.0 1.1 1.5 Transect F Station F-1 Station F-3 Chain pickerel .5 I Golden shiner Lake chubsucker Spotted sucker .5 .5

.5

.5

.5

.8 1.6 2.3 2.4 .6 I Yellov bullhead Pirate perch Warmouth

.6

.8 Bluegill .6 TOTAL .5 0* 2.2 1.0 .5 3.2 2.4 2.9 Transect G Station G-1 Station G-3 Chain pickerel .6 .5 .7 Golden shiner 9.9 .8 5.7 Creek chubsucker 1.3 1.5 I Lake chubsucker Spotted sucker Pirate perch 1.2

.5 1.1

.5 1.?

.7

.5 2.0

,7 1.4 Yellow bullhead .5 1.0 3.4 1.3 1.0 Flat bullhead .5 Redbreast sunfish .5 Warmouth .5 1.5 Bluegill .S TOTAL 2.3 .5 4.C 5.8 12.4 3.4 0 17.5

• NOTE: 1 sample only 4-31

Table 4.2.3 Fishes collected by seining during Robinson Impoundment I

quarterly sampling during 1979 (number per hr.al).

l Winter Spring Sumer Fall Winter Spring Summer Fall Transect A Station A-1 Station A-3 Chain pickerel 3 1 1 1 Bluespotted El sunfish 3 5 '

Bluegill 55 1 l

Swamp darter 10 g i TOTAL 0 69 0 0 0 3 2 1 5l Transect E Station E-1 Station E-3 I i

Chain pickerel 1 Bluespotted Il sunfish 1 Bluegill 3 TOTAL 0 0 0 4 1 0 0 0 Transect F Station F-1 Station F-3 Chain pickerel 3 6 1 1 1 6 2  !

Lined topminnow 1 1 l Pirate perch 1  ;

Bluespotted 1 sunfish 1 Blackbanded i sunfish 2 2 Waruouth 1 Bluegill 2 3 8 1 7 Largemouth bass 4 Swamp darter 3 3 TOTAL 8 9 17 1 5 14

• 6 Transect G Station G-1 Station G-3 Redfin pickerel Chain pickerel 7 1 1 10 1

9 5 5

Colden shiner 1 1 Lined topminnov 9 5 Mosquitoffsh 1 Blackbanded sunfish 2 3 1 2 gl Bluespotted 3 sunfish 7 2 1 4 Redecr sunfish 1 Warmouth 2 1 Bluegill 1 2 3 Dollar sunfish 6 9 2 11 Largemouth bass 2 7 6 Unidentified sunfish 1 Swamp darter 2 1 1 2 TOTAL 2 37 27 1 2 22 37 5

• N0iE Sample simi?ar to Station F-1 but not quantitative due to numerous anags.

I I

4-34

~

l

W E O E E I

Table 4.7.4 Fishes collected per hour of electrof f shing from Robinson Irpoundment during 1979.

STATION A-i STATION A-3 Sampling Period Sampling Period TRANSECT A Jan FU May Aug Sept Oct Nov Jan Feb May Ag Sept Oct Nov Redfin pickerel 2 Chain pickerel 2 4 2 4 6 10 16 2 2

Spotted sucker 4 2 2 2 Pirate perch Mud sunfish 2 Blusspotted sunfish 2 4 4 2 2 6 4 2 8 8 20 2 2 2 2 2 2 Warmouth 248 262 50 8 80 78 78 180 286 28 4 64 50 64 Bluegill 4 2 4 2 2 2 11ybrid sunfish Largemouth bass 2 4

7 Swamp darter U Yellow bullhead 2 2 264 288 62 10 92 90 88 188 300 36 4 74 76 70 TOTAL l TRANSECT E STATION E-1 STATION E-3 8 4 4 4 6 2 2 Chain pickerel Colden shiner 6 Creek chubrucker 2 10 16 2 2 Spotted sucker 2 2 4 Yellow bullhead Blackbanded confish 2 2

Bluespotted sunfish 2 2 2 12 2 4 Warmouth Bluegill 70 10 34 28 38 16 98 110 222 2 20 14 18ybrid sunfish 2 4 2 2 4 4 2 6 18 Largemouth bass 2 88 20 50 0 30 44 32 112 136 232 0 4 28 36 TOTAL l

1

l l

Table 4.2.4

^

i (continued)  ;

STATION F-1 STATION F-3

, Swpling Period Sampling Period i TRANSECT F Jan Rt May A3 Sept Oct Nov Jan Feb May M Sept Oct Nov i i

t l Mowfin 2 Redfin pickerel 2 j Chain pickerel 4 12 4 20 2 2 10 6 8 14 24 12 Goldeu shiner 14 2 2 4 '

1 Creek chubsucker 2 16 22 8 10 4 2 i Lake chubsucker 10 2  ;

Unidentified chubsucker 2 ,

l y Spotted sucker 23 36 6 2 2 42 42 4  !

& Yellow bullhead 2  !

• Pirate perch 2 2 2 l 4 2 4 2 l l Lined topminnow 4 l Mud sunfish 2 2 2  !

Blackbanded sunfish 4 4 4 Bluespotted sunfish 1 2 2 2 ^ 8 10 2 8 10 Warmouth 1 B 6 4 6 6 27 2 10 14 10  !

j Bluegill 5 2 2 8 2 20 24 12 17 2 16 78 18 Dollar sunfish 2 2 2 6 l

. Redear stnfish 2 l l largemouth bass 2 4 4 30 10 4 2 4 32 2  ;

j Swamp darter 4 1

TOTAL 34 54 26 12 30 84 I f, 116 118 66 22 62 166 74 l

(

l I I i J  :

am W W w W W W W M M M M M M W W W W M

g

~

g M M hM M M E E Tatle 4.2.4 (continued)

STATIF.4 G-1 _

STATION G-3 Saraplirg Perlod Samplin Ll 'eriod TRANSECT G Jan Feb May Ag Sept Oct Nov Jan Feb May Ag Sept Oct Nov 2 4 2 Bowfin Redfin pickerel 2 2 Chain pickerel 22 16 2 4 4 26 6 6 2 2 18 44 20 6 4 208 4 52 28 Golden shiner

Ironcolor shiner 2 l l Lined topainnov 6 4 2 2 2 )

2 l Mosquitoffsh 6 2 2 4 16 4 10 14 6 10 i I Creek chubsucker 2 6 4 6 2 f U lake chubsucker 10 Unidentified I 4

chubsucker 44 8 2 4 32 28 2 6 4 6 l Spotted sucker 12 2 l

Yellow bullhead 2 2 2 4 12 4 4 2 4 2 Pirate perch 10 10 4 4 4 l Blackhanded sunfish 12 20 l

Bluespotted sunfish 38 24 6 2 14 2 40 12 6 4 10 14 l 8 4 44 2 4 20 8 16 8 24 2 2 16 18 I Warmouth 4 4 4 4 4 2 2 12 18 2 Bluegill 6 14 8 6 12 2 2 6 2 2 Dollar sunfish 6 2 2 2 10 6 Largemouth bass 12 f Swamp darter 2 126 118 76 28 258 120 28 128 72 44 20 114 156 84 i TOTAL l

Table 4.2.5 Waller-Duncan K ratio t-t2st results for electrofishing catch for each campling quarter (all aampling locations combined) comparing catch among sampling years. Means are log catch per hour. Underlined values are not significantly different (95% CL).

Winter Quarter Spring Quarter Summer Quarter Fall Quarter 1977 1978 1976 1979 1978 1976 1979 1977 1976 1977 1978 1979 1977 1976 1978 1979 Total catch 5.9 5.3 4.8 4.7 5.7 5.0 4.2 4.1 3.9 3.7 3.5 1.7 5.1 4.8 L.2 3.9 1977 1978 1979 1976 1978 1976 1977 1979 1977 1976 1978 1979 1977 1976 1978 1979 Bluegill 4.9 4.1 3.5 3.3 4.9 4.2 3.5 2.7 3.2 3.1 2.9 .8 4.0 3.7 3.1 2.5 i'

1976 1978 1977 1979 1978 1976 1979 1977 1977 1976 1978 1979 1977 1979 1976 1978 Largemouth bass 1.7 1.4 .8 .5 1.0 1.0 .4 .4 1.4 1.3 .5 .3 2.9 1.3 1.3 .9 1976 1977 1979 1978 1976 1979 1977 1978 1976 1978 1977 1979 1977 1979 1978 1976 Chain pickerel 1.4 1.3 1.3 1.1 1.4 1.0 .9 .6 1.1 1.0 .7 .5 1.7 1.5 .9 .5 1976 1979 1978 1977 1976 1978 1979 1977 1977 1976 1978 1979 1976 1977 1978 1979 Warmouth 2.2 1.7 1.6 1.3 3.0 2.9 2.3 . 9[ 1.9 1.3 .6 .4 1.5 1.3 1.2 .9 m W W W m m m W M M M M m m p m e e e

gM M M M M M M M Table 4.2,5 Waller-Duncan K ratio t-test results for electroffshing catch for each sampling quarter (sampling years 1976-1979 combined) comparing catch among sampling location.

IIeane are log catch per hoor. Underlined values are not sir ..icantly dif ferent (95% CL).

Spring Quarter __, Su=mer Quarter Fall Duarter Winter Quarter E G A E A G E A E G A G 5.1 4.7 4.4 4.1 3.9 1.7 5.3 4.4 3.9 Total catch 6.2 4.9 4.5 A G E A E G A E G A E G 5.0 4.2 2.2 3.8 2.3 1.4 5.2 3.2 1.7 Bluegill 6.2 3.8 1.9 G A E G A E E G A E G A

.9 .7 .5 1.9 .7 .1 2.4 1.6 .7 Largemouth bass 2.2 .7 .5 G A E G E A G E A C E A

.4 1.8 4 .2 1.9 1.1 .5 Chain pickerel 2.3 1.4 J 2.0 .5 G A E G A E G A E G A E Warmouth 2.0 1.7 1.5 3.0 2.0 1.8 1.9 1.1 y 2.4 .9 .3

Table 4.3.1 weteht. og fishes <se > rer imet.se collect ed f ro. ec,e. .f r.61nw. i.e.-nd ent 4 rte, a e 1974 1975. I+17 197s. .mt 1979 trwer

• A+ A l Mid

• F-f l tipper - C-Il Head

• C-4.

1974 1975 1977 1978 1979 MId MId_ 4?pper towar Pld _ ttpe r Dead twe MId 38pper l'eed le=*r Mid ige it*>*J Ber I;pm Imrer Eastern omimi nnew 22 25 22  % 16 27 64 29 174 sedfin plebevel 544 1990 487 314 24M4 79 5081 4515 197 1985 21 % SIS 88 8044 486 207 117 8984 (2.s t a y t tkevel 11574 7791 3632 41504 4589 5889 illil 6021 5852 timo 24141 2223 I l7W 17453 61107 lill 7211t 17858 Gelden shiner Ill 170 642 240 376 92 155 ITA 4?) 9 88 22749 9 11 % min 6 trancelot shiner tws4y ehiner to 12 %4 tinident, obiner I 476 Creek etmbswter 86 64 642 )$ 398 1599 3495 46a4 1959 3110 1218 7124 895 49 % 4514 lak e v. lmb,wt h er 1 18 28) 1730 2W9 2144 9018 2049 ttnident if f ed t imbew k er 54 8 24 Spot t ed sot h er 19108 2918 1%i8 7639 40R91 8711 1%lt 127 15207 24mn2 25156 47728 15708 nAilte cetfIsh 17 Yelltw Imt lheed 2051 3% $7 924 2 35 209 129! 186 19 1 614 85 595 647 3 12 59 2431 27 22 41 Tsdrole madtem Unid+ at . ma4t ou 12 IF9 7 p Sweepffsh 180 R9 69 26'.

27 257 729 548 18 891 117 IW4 223 2 11 1%4 4

158P) 144 the 128Jt 6%2 d Pirate perth O 42 12 346 62 78 thA1 15A5 154 668 7 NI Lined tcpagneaw tbequitettsh 225 IS 25 69 849 120 172 189 T 1 8 15 Mind sunfl=h 457 924 86 91', 198 til 1019 523 29 2514 2st i 169 IIT2 Banded rlgny ownlleh 2 5 12 T 4 22 4 Everglades ple:my own f I si, 8

t% Ident if ied pig =y s.en f ld 27 8terbbanded swutish 180 124 57) 49 119 526 til 524 267 2Rm 264 272 1790 40 492 %97 81wespetted ownftsh 1688 47I 2301 1584 1u92 3067 7F9R I63/ 4enn 8126 6929 F24 754I 9531 1706 42 8224 R17M medi:rcent s nfl=h 6140 E55 27 405 lia rerwt h 1964 17875 15928 29398 37671 9617 18194 20481 15114 15648 lisan 3rx15 18712 14924 17996 1845 197*6 IW5 BIwegill J89 54834 18671 17675 831 %  % 00 2 3fE5 45948 3140) 2f 58 29916 ll55A 14150 1542 Mill 1 pr.4 955) 2491 tblier sunfloh 57 2 108 2411 7171 1609 3591 3160 4068 .5591 Sedeas e=nf 1 A I19 201 targe.neth inass 239 8t,% 38& 18120 2849 205) 23 % th17 l%7 %I) %92d 9 10845 1955 2238 1%2 11midentitled hybrid ownfisle 22 519 2 30 464 9 11 1%

Sweep da?.es 25 I2 47 657 I61 12 492 2 19 894 72 189 5 ten 4 12 59 4 S=w heek dart er 84 10 7 12 151 81 8 7 #9 Tessellat ed dart er 49  !? 8 TOTAL

• 48241 930% 424RI 139818 1%8% 29259 119317 86205 1898 % 18755 92904 4 7t*9 112529 989R8 122917 10412 It8t t08 186281 g g may r el y f r' of sd r erre g

E E E E E E E E E E E E E E le. sabers of fishes per bect are collected f rom coves of Robinnen lepneedment dest ina A4retrSt 1974, 1975, 1977, 1974, and 1979.

Table 4.3.2 Iswer - A-1; Nid = F-l: l'pper - C-Il 19 a<l - C-4.

1976 1979 1974 1975 1977 Iemer M14 try read Irwer Hid l'prar tie =d I m,e Mid ITp-r , ltend twer Fid t'fpe r _ low =r M2d ITrer 19 24 7 33I 15 12 5 I? 8 Fa s t e r n newle t nmm to 24 IS lol 24 24 15 151 20 49 49 37 62 83 21 155 Median pf cteret 25 7 294 402 318 64 264 e27 115 35 133 FM 28 186 54M 159 2R Gain ptrkerel 59 86 7/

19 A4 5 29 14144 188 79 74 18 48 Colden shiner 69 57 8698 9 3265 fronrotor ehle.et 10 12 683 lumky shinct 1392 Unedentifled shle.cr 44 59 12 197 322 19 66 23 16 5 59 128 Creen chubsecker 25 20 371 22 43 15 5 12 35 I2 La6 e c hul swr ker thidentifled 15 8 62 7 521 46 chubsuc6er 49 488 24 48 9 21) 62 175 Spot t ed sucter 1 33 40 12e tA>lte catfish 7 9 220 205 5 66 723 47 37 89 81 25 156 174 201 32 Yellow Imi thead 99 85 24 15 7

Tads =>I e madt om 12 2 39 Unidentified madtom 18 4

44 24 229R 73*8 Swampfish 156 2 32 4553 40 55 8 10 24 5 16 25 IF 40 62 12 833 185 ffM8 Pirat e perch 62 18 2tK)9 2868 84 1238 25 109 106 7 58

c. Lined topainnow 140 592 453 24 7 58 586 47 25 96 3260 212

[ Moesultoffsh 17 22 25 28 22 14 7 IJi 5 ~- 7 Mud sunfloh 15 16 17 12 r 12 15 12 5 Banded pigmy evnfloh Everglades pigmy 5 sonfIsh tinlaintifled 2 36 16 426 2;97 pigmy sunfish 15) 3492 42 198 2574 til 30 463 17 274 546 74 1 38 9 4788 42 y3 Blackbaewfwl eunf l=h 4R06 4761 487 2670 Be 64 2M6 301 9524 7469 788 88uespotted tuntteh 2298 640 2238 1844 435 5

423 25 10 2451 889 Redbrea-t runf*eh 870 160 267 4516 4740 80 et 2489 909 f(4 19 1438 660 1510 213 613 111 85 147 43 Wa rmuot h 2949 858 1722 1732 2201 104 1022 31508 4322 8656 12046 210 5319 5719 2 100 847 aluegill 2972 882 134 2400 32 2892 *i28 tbilar sunfish 12 2 *e pelear sunfish 8 9 103 RI 275 93 77 62 195 22 II 64 197 455 lar ge==mt h 5ssa 25 252 thidentIffed 12 48 19 49 25 18 PO 20h 4 hybrid ev.aff=h 215 375 19 536 19 25 12 109 1%B3 339 $9 947 67I 4191 6 120 Swamp d ar t e r 114 119 19 151 17 22 31 22 8 Sawcheck datter 48 l Tessellated de-ter 54 30 2178 17 % 4 18651 1875 247 14872 36735  ;

TOTAI* 8369 33637. 12058 12269 14364 9051 15365 R229 21189 25542 I

• Tot a l ma y d i f f e r s t i rja t l y f r om stan o f o per l es due to rounding error.

I l 1

M@N _

~ .

Table 4.3.3 Changes in standing crop estimates for several fish species from 1977 to 1979 (cove rotenone samples in Robinson Impoundment).

1977 + 1978 1978 + 1979

% Change  % Changa_ I Change  % Change Avg. Weight Avg. Weight Avg. Weight Weight Number Weight 1977 1978 1979 Number Station A-1

-68 + 23 - 82 - 71 4.3 17.4 27.4 Bluegill

-50 - 62 + 30 + 51 196.2 148.6 173.0 Warmouth largemouth

-65 + 32 7.8 17.1 65.6 Total (all taxa) - 22 - 65 Station E-1 18.0 38.9 Bluegill -69 - 31 - 95 - 90 8.0 y

76.5 71.5 98.2 j, Warmouth -84 - 85 - 55 - 38 25.6 1.0 N Largemouth -85 - 99

-71 - 75 10.5 17.7 42.2 Total (all taxa) - 51 - 90 Station G-1

- 3 - 83 - 70 11.3 '5.6

. 26.0 Bluegill -25

-45 + 22 -

1 + 6 3.39 7.5 8.1 Warmouth 9.4

-48 +705 +128 - 80 6.8 105.3 largenouth 6.4 7.6 Total (all taxa) -17 - 5 - 19 - 4 5.6 l

Station G-4 57.9 Bluegill -88 + 25 - 59 - 30 3.1 34.3

-48 - 8 - 2 + 32 9.0 15.7 22.I Warmouth

- 46 + 15 - 56 36.2 37.7 14.4 Largemouth -48 3.2 Total (all taxa) -35 + 26 + 99 + 17 2.8 5.4 W E C W E E E E E E g M M M M M M M M

I I

m.e . O dI  !

It ei l e

P eI k n - e '

f.i

e. V'

• l O

!. i, e, - t

.. . . . C

.I f

. Gm jt">

~ ~

• e* ,

O

~

1 e, * * * -

,5 1 a a il

~, - - -

-y e

,~ , -

e I -

. ~..

j~l g - ~ -

,I I

.N)

I e #

7 -- *

~

3 l

a * - - -

~.

l 2 4F ~ ~

I q r ~ - -- e ,

o _

, . . e. .. -

O.

~ *.

e

. i b.

e

= .

0

)E <

a

~i

~1 me

- .- eg

+

tl

i - .

i l

! ~s! ~ - -

e a

~

4 1 g -

- lo l A * - * * ~

9 , -

{U 2

- - - .,. ~

{

. p , , - - - , e

.e lw

.S ~ . ~

a. .

l e ~. .

, p~,i ,

- ~

5 i: o s 2 -

,I e t

e l',, - ~

r

~

9 imj C , -

I $

I 5

b

L,_,

$ E1 e

=

l i

~

• t

. em.

% ~- + \ - - ~ e

~

il 4 4 j ei l,

}

i e_, - ~ - -

1l~' 4 4 L

f ,

U 1'!:t

• 9 * ~

9

~

lD 4 2 I 3 e

5..t-1

- . .l. i . ,

e

m. - i

, ~ ~ - -

i .r

'"'. el e- es si e 5 ei y o'g eiglj y e- s' e el

- C e!

el, s

D I A

!!e .!l.,5 f! 6. ${

[

f.'Elf.!e ..f;Ilt1 ni l

-T'T.;,2il! tje fkI 2T. .;7'ja:

.EI.! ol e,l:c. E!a'li!;:34...:tj.,2.1i:ml 4

t.e l r., ~ v v a i

n; ;yya

- -4 s ri

< u u - - -. . - a 21 .4d b it  !!3.fy15:!!;l 5 l,l e I 6 zil'*' *t b@il  :;d Tla<a*!: sl.s{1'I t';; pj:a: g: b.;.

t  :' : 1!the si s stT.e.3 :c.ica: E l s:l J: A,$ti.-!

i

• .l w w, a ~m 4 i,

- .t.I ::2... wu:a rt ww e I

4-43 l

I

e Table 4.5.1 (cont s...d>

Januart Febewery'

• Agtti Nay June July August Transett F 1 54 25 ~1[2j I 8 15 22 29 6, 33, 20 2[ { 10, 17 24 1 8 13 22 29 5 M ~I976 - ~ Isov ~lI~.

Eson .3 .3 .3 iki "Jt" 3 Nt e= Jet .3 .3 .6 .6 .3 .2 etvysoleucan i

.3 Erleirne 12.8 3.4 1.4 2.0 .5 .5 N"IkD_ 2.5 .3 6.9 2.4 1.9 .6 12.7 melanore .3 tctaluna natalje .9 .3 .3 .6 .8 .8 .3 .2 ictai....

gNAeghalus .3 y seedoderne

! *1*"*2 *3 d1 .3 3 '!"n I nee!"* tatum

.)

4 6 Ennescanthue .3 1.1 5.0 1.8 .8 8.9 3.9 7.2 2.4 1.4 .8 5.3 2.9 .3 D I""'*fla t_Ib chaetodon .3 .3 .3 .3 Enocacant h.es

.3 .3 .5 .3 1.8 1.4 1.1 .9 .3 .3 B.3 1.2 .4 glottoews Lengt s, 2.8 1.1 78.5 44.7 62.7 58 1 9.4 109.8 3.5 23.2 45.7 13.3 23.0 2.5 3.3 .3 tirate 6.0 .6 .8 gulaene 3.'f* 8 8 .3 .3 m_screchtrue .5

.L*P""l*_

3

=. ara.a*1"1 8 a Nicropterve salmoides .2 .3 .3 .5 .3 .3 .6 1.4 .6 .6 3.3 3.3 2.3 2.6 1.8 .3 .6 2.1 .3 Etheesttaa Etheostras i.aiisM 1.0 .3 .3 .3 t.s .8 2.6 1.6 .3 .9 .3 .5 .3 .6 4.1 a.6 .)

Tt! TAI. .5 1.0 .3 0 .3 2.0 2.4 .8 6.0 5.3 2.8 84.8 71.9 74.4 72.3 28.5 133.3 7.0 26.5 53.2 21.4 31.0 3.7 a.5 5.7 6.8 2.5 .3 i

Table 4. 5.1 (co ,to,e43

• h.

• July A.eg et

• Aprit Mer J.me g ~Il 8 n y n ; n2

~

L, 2$ n 1r= = se c Jana ry Tli 2s n 22 - 1 Febenry e 1.1 22 21 $ n gg 22 7_ 21 1 Unident if led fteh egg .3

.6 1.1 .5 reon '3 '3 "I E*E .6 Cyprinidae .3 16.2 1.4 6 .8 he enigomse I.4 .) 2.4 .9 3.6 .3 .3 162.4

.8 rhryeol.e css .2 htregis remaingue .a

.6 .9 5.4 .9 1.6 .3 2.0 Notrert. .2 .3 1.1 5.6 .3 c e 3.8 .9 4.5 1.9 36.3 1.9 1.7

~g{isy idif^jcus 1.3 o 3 3 II.tary o.

'6!"as"* t.6 Enytream .3 .s 3.1 1.2 .4 .3 .3 4.4 .9 me t a.wys d !ctaturne 1.4 .3 .3 .)

j h petalte 6 3 .3 .7 u A & bierum .3 .3 .6 .3 saym+ss_

Cembesia 8.6

'a'iinis' f .) 2.2 .3 1.8 8.9 3.6 2.8 1.1 1.7 4.9 ,6 .3 6.7 2.9 1.3

.* .3 4.2 4.0

[nuescant_ks .3 .5 .s .3 i mas * '*alwt .3 .6 sheetodon 1.4 1.3 1.4 .5 .3 Enneecentwo .3 .3 1.4 .3 .5

.3 .6 1.6 2.4 42.8 24.3 1.1 3.3 23.4 7.s gloriosue 57.5 332.2 324.9 31.2 97.8 67.2 173.9 16.0 3.2 Isrc, f s .5 1.#3gh .3 .3 auritte 10.0 2.9 .9 .3 8 1.2 Nf"l8 .3 g losus .3 .3 I*E"".88 .3 mac r oc h t rus. .7 6 .3 .3 .6 .3 hE** l*

marJtestwo 3.2 .3 8.1 .6 .2 l'T**T2* .4 .8 .9 .5 .6 .3

.5 .3 .6 salmo1Jee .6 1.1 .3 .3 .9 1.9 .3 3.2 .3 5.2 .9 3.0 3.6 3.6

((iyet5 8 6 .2 Etheostoma ,9 .3 Tee'irorme .3 .9 .6 1.1 1.1 1.1 .6 4.7 35.3 32.8 30.4 3.4 .4 I .3 0 0 1.8 2.0 2.6 2.5 8.2 2.7 10.4 69.3 3&9.8 331.2 38.9 270.4 131.1 IRL4 28.3 8.4 14.7 63.9 31.6 TOTAL I

g

~~

1

• l L

• kl . *.

ei 3

w e. *. =. e. .

m - e L o. e. o. e.

~ e r -N N

~

• * * ** 9

• Id,j . - ~ ~.

y a ~

m

.- ~

• O n - -

< e.,.

. e. .

Cl "C $

e e

. N N e ^ ,,

4

~

~; 4 4 4 4 N . e

~ e e 4- e 4 .

.m.e.e.! .$.

N

~

5 M

5

, - N e .~.

m -

k. e. E.' O.

4 C ..

e - e .e e.

.i . ,.,

e o e e e - ,

a a A 4 es 4

m amel e w .-

,, e < e . N . .

4

~l Y b < 3' k

N is N sse 5, m.

.M

e. d. . m.

4 ~

me ase e N

e ens s.*y L @ N . e

.g

- .es

. . . e- ,,, . ~

& D E *N & N $

:"I * "

E *

,., O g en M 4 4 N eS 44 A mt Y.

N k

. 1

. m N e ~

U su N 5

g A f>

. M.

99 N. se. o. M.

,,e N N se -

e o

N we N

em se -

e to I e em N d 3 a A, M.

4

e. . N.

.e e. ..

M ' F5 N M, e N

> 1 N e *- e -

e a e N

• nt L 1 - o.

. o. a. o. n. e. .

4i e4 N et M 4 e sue e

- a

8 g 2 .- 5

1. l m.

4

~. e.- N e.

i

• • • • e e

em

.i .i to M e.

== g N e e G w 9%

3*

c$ N 4 e - **

egog f M F. N M 4 e 4 e a, N e. o. + . e.

.. ,e e g N g g n% ~

o < N e. +

s

.L. Oi 4 4 4 4 ~

4 l

a* .i

~

a O

4 d

N a,

o 4

, ,, N e ~

.e ==

h ~'

2 .

~,, % ~

5 ,i. .

kl .

del ;N Ir a

e e

I! jl-ej - -

~

I .1-' 4 4 1t

-i

~

4

~

4

1. L'w - .

es

t. N p- o a o e a

o 2

~* --'  ; a a A .i N . 3

• e og e er O UI! e,j

,e . ',-i' .e stII or I.!.,g 3 I

.i l i i e.! e e- -

.y g

p wi g w g=,

SIG 4

l == AN sg.J him i Q, ans ' *e.t

'E es ?

l

-k. l e. < 4 =9 j

1*

<E f.

iO O r ei e Si e

= es w f we e at e m ei g,6e wtM.T I h 'i +w 5 bd f h f

88 188 ni et ee%.C mpi 6ess me .j sI M @

gm N!

. ,I S. UD l bf I h -D..

h .aW I8 81a. f' b.l ! Ml f,4 Se4 - Q 8 8'r k 1$

+ (

A et 4 AiCs!"jo.11 *'a;

- :~

i "'O a!E. p ,' =. 3 1 p% " 3.g.vigj r

'El $st.$'WI2si" g e#

4-46

-~. _ - _ . . _ _- __. - _ _ . _ , _ _

I I

I I Table 4.5.3 1. east significant dif ference comparison of push net catch per 1,000 m3 among transects sampled in Robinson Impoundment. Connected values are not I significantly different (95% CL).

Log Mean 3

Transect Catch /1.000 m I Total (All Species) G F

2.7 1.8 +

+

A .7 I

E .6 _

I Lepomis G F

E 2.2 1.4

.2

+

+

A .2 _

Percidae G 1.8 +

F 1.4 +

A .9 +

E .6 +

I Catostomidae G .8 +

F .6 +

I E A

.1

.0 I

I I

I g 4 47

t r

t I

l f

[

Tahte l.b.I i Ichthyoplankton entrainment at the 11. B. Robinson thit 2 Intebe dering 1979 (nisaber/1,Ory3 n'). l Hean of replicate day and sept.'cate night samples.

l

[

t January _ _ p bruary 1] y3_7

• April J+me J.4 t y * *

• A"B"*' 8"'- i' laxa 1 13 2_8 M . 2_} l 8, p ,22 [9 p 1 lj! H 21 1 8_ 15 22 29 5 12 19 26 11 1

1. erne t s 3.9 17.0 5.7 10.8 80.2 5.3 25.6 7.0 6.9 17.8 14.7 20.3 l

Percidae 3.7 7.2 14.9 4.1 8.8 30.4 21.1 37.5 39.3 31.4 47.4 1,A.8 390.4 74.4 156.5 12.1 82.6 44.0 49.2 5.1 i

Ethecotome '

k

[usiier 3.7

, CD I

TOTAL 3.7 10.9 14.9 4.1 8.8 0 0 0 30. '4 23.1 37.5 39.3 31.8 St.) 371.8 407.4 82.2 167.3 6 87.6 10.4 56.2 6.9 22.9 0 78.7 20.3 e i

i

• Sampling program designed to reflect erewning activity.  !

No emeples collected in Marr h, September. October, or twee6er 1979.

f I

i I

. I l  !

i i

i [

l i

i l

l l

i t

Yable 4.7.1 Fishes impinged on the 11. B. Robinson Steam Elcctric Plant intake screens during 1979 (average number and weight (g) per 24 hot.rs for each sampling period).

Period 1 Period 2 Period 3 Period 4 Cire pamps = 2 Circ. pumps = 2 Circ. pumps = 1 Circ. pumps = 2 UNIT 1 Number. Weight Number Weight Number Weight Number Weight Pir; e perch 2 12 T 1 Bluespotted sunfish 1 4 Bluegill 5 56 63 1,645 20 281 3 28 Swamp darter T 1 1 1 Total 5 63 1,645 23 207 4 30 Period 1 Period 2 Period 3 Period 4 7 Cire. pumps = 3 Cire. pumps = 2 Cire. pumps = 3 61rc. . pumps = 3 '

S UNIT 2 Number, Weight Number Weight Number Weight Number Weight Chain pickerel 2 1,157 1 701 2 639 1 536 Colden shiner 2 18 1 66 1 5 1 4 Creck chubsucker 2 14 Lake chubsucker T 3 Spotted sucker T 5 White catfish T 2 Yellow bullhead T 7 Pirate perch T 4 T 1 Mud sunfish 1 4 Bluespotted sunfish 2 8 Warmouth T 7 T 19 Bluegill 51 1,023 48 891 57 1,084 40 580 Ilybrid sunfish 1 44 Total 55 2,217 51 1,702 60 1,728 48 1,175 Period 1 = January, February, March, April, May, June, October, November, December Period 2 = July Period 3 = August Pericd 4 = September T - less than 1 per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />

I F I

Table 4.9.1 Percent of deformed bluegill collected by g electrofishing from the transects sampled g in Robinson Impoundment during 1979.

N = total number of bluegill examined.

TRANSECT WINTER SPRING SU)BfER FALL A 34% 33% 61% $3%

N=486 N=39 N=80 N4136 E 43% 74 % 71% 89 ?.

N=144 N=120 N=17 N=44 F 20% 20% 43% 53%

N=35 N=10 N=14 N=36 G *

• 33% 257 N=0 N=0 N=9 N=12

• No deformed bluegills collected.

I 1 I

E i

I I

I I

i 4-50 I

E

I ~

U. S.1

'l i

Black Creek I

j~ Station G-4 SR 346

.m Transect G daX ax**

3. .

Transect F 2 4

• x' Transect E a Gill Neu

]$'g M Electrofishing

.I 0;scharce b

i.

• Rotenone e Larval Traps a Larval Tows x Seini~

l

/'

SCs151 SR 39

)

l Discharga Canal

}

} $-

SR 23 4g3

, , ;3g i

.. -.s Q

i  %,, c,ee,

Figure 4.2.1 Fisheries sampling stations in Robinsoa impoundment.

g -

I SSS I een J5000 + a2e l SSa aan i saa saa i sea sea i saa ese 1n000

• aan saa i ese sea see I asa see saa 1 588 SSA ase I asa saa saa 2$000 + aat sen 48P i ten S.A est l Sea 4as aan i saa saa see I maa ses aan esa 20000 + aan Sea Age esa y i et. n.a esa aa i .as .88 ..e ... age 8..

• • l Baa a9a Gas SSR Saa San 6, i .na sen ... .a. a.. .at to 15000 + 888 SSa sta saa tag tea ama I 844 eSe Gas att .48 eas Sea See Baa i att sta Agt SSR See SSA Bee see See I $45 sat sta seS Sta att Sea Sea See Sea aSR l Sea 898 ase Sag age Sea Sea een saa see asa 10000 + 8tt aan SSR aSR San Sea Sta att paa Sea saa i saa ata saa SSR ama tat stb ese ass att ase saa l age saa saa saa aan att saa het Set att See 888 att est I maa een saa Gaa Sea gas aan Das saa tea ese see att see i Sea saa saa ats 395 SSR ena des att See SSA see asa see soon + aan saa sea sea sea asa saa ase :a a n see see aan saa see asa i era saa aan asa saa ans ses saa esa ese saa saa saa ses aan i een saa sea ass aan saa saa ses ase ese esa saa saa saa sea 1 ama saa man saa esa saa ese ass aan saa ese sea sea saa aan esa man i eaa aan sea saa ese saa ese ese see 247 sea saa sea sea ese NS NS eaa esa esa 1974 1975 1977 1976 1979 1976.1975 1977 1978 1979 1974 1975 1977 1978 1979 1974 1975 1977 1976 1979 YFan I-------- A-1 --------I l-------- t-1 --------I i ---- G-1 --------I l-------- G-* --------I sTallO4 Location NS = Not Sampled Figune 4.3.1 Numbers of total fishes collected per hectare from coves of Robinson Impoundment in August 1974,1975,1977, 1978, and 1979.

M M M M M M M M M M M M M M M M M M M

M M m M M M M M M 'M i

l l 6 ans i I ama 36000 + ase I asa l i See l l ans l 27000

• maa j i saa i ans i sa l 24000 + ese I asa 1 ans I asa 21000

• 365 l maa i saa i saa

,. lH000 + aat g ass i

u t3 i "*

g aa$

15 Hon + 880 l asa i saa i ens 12000 + Saa saa i saa saa l Asa aos I asa saa 9000 + aSe saa aAs I saa saa saa i saa aAs asa i esa saa saa 6000 + ese aan saa asa I asa saa saa saa esa i saa aos saa saa saa esa i saa esa saa saa ese asa 1000 + aan saa aos saa aan ama saa nas I asa esa nas saa saa saa saa ans nas I ans saa ama saa esa saa saa saa saa saa esa I ans ese aan esa 311 saa asa saa ama SS saa 220 ans aan 367 NS NS aan 104 43 1974 1915 1977 191H 1979 1974 1975 1971 197H 1974 1974 1975 1977 147H 1974 14T* 1415 14TF Iw?H l'879 YEAR l-------- A-1 --------I t-------- E-l --------' 4-------- G-1 --------I l-------- in-* --------I s t ai lors Location >

NS = Not Sampled Figure 4.3.2 Numbers of bluegill collected per hectare from coves of Robinson Impoundment in August 1974,1975,1977, 1978, and 1979.

t

4500

• ama 1 .Saa i aos i nas i saa 4n00 . asa i asa i saa 1 asa l see '

3500 e saa i osa 1 asa i saa i saa 3000 + ama i ses-I ses I saa l aan 2sno + aan saa saa 3 l aan aan saa i saa saa eaa I asa esa saa i saa saa saa p 2000 + esa saa nas 3 i saa saa ans y i .ma saa s.a i saa saa saa esa i saa aan saa aan 15n0 + aan saa saa Gas saa

, I ama ate asa esa man esa i saa ses saa ans saa saa i saa saa saa aos esa ans

, I ase saa saa saa saa saa 1000

• aan ese saa esa een saa l aan aos saa saa saa ses saa saa saa Ana i asa saa saa saa saa ans saa ans aan saa 1 asa esa saa aos esa sea saa saa esa esa i saa asa asa maa esa aan aan saa ans saa esa 500 + ama saa esa esa saa saa saa saa asa saa saa l asa saa saa nas esa saa saa man saa ese ama i saa ans saa esa esa esa saa saa aan saa aan saa i aan ans ama saa saa esa esa ass aan saa aan aae saa saa i ses esa asa saa ese ans saa 3sa 42 19 ans saa ama ans nas NS NS asa aos see

---

. - ......-----...........--...--..- ..-............. ,_ = ...............--.....----...--......--.-

1974 1975 1977 1978 1979 1974 1975 1977 197M 1979 1974 1975 1977 1978 1979 1974 1975 1977 197H 1979 YE ap l-------- A-1 --------t l-------- f-l --------! l-------- 6-1 --------I l-- -- == b-4 --------I 57ATIHH Locatiort NS = Not Sampled m rg 4 uw of >utigectg hegfroges gingpgngugug74, g 19g . g g 5

m M M- M M m' W W W W W W W 'm I ama i saa 24n + Sea i aos esa I saa asa i ass saa 210

• saa ass I asa nas I ass saa ese esa i saa a2e saa saa tan + asa esa saa esa a saa saa saa saa i saa saa saa maa i saa saa sea saa saa

}ISn+I aan saa ese maa saa

] asa saa saa saa saa g i saa asa esa saa aan p I saa esa saa esa saa .

tn 120 + ans saa saa nas ess v' i saa saa *as saa saa i saa saa ans pas saa est i saa saa saa esa 296 ase 90 + att saa saa saa saa esa saa 1 asa' saa esa saa nas nas saa ama I asa ese saa saa ass asa saa s&s tes I mas saa aan ass ama saa esa aan saa ese en . saa saa esa saa esa asa saa aos saa aan ama i esa saa saa asa saa aan esa ans saa saa saa I ans saa saa saa ada saa aos esa saa ese ama i saa esa saa saa saa saa esa man asa saa esa in + aan saa est saa aos saa saa asa ama maa saa i eaa saa ans saa saa saa saa esa saa ese esa saa sea i saa saa saa asa esa saa esa saa saa esa saa saa asa aan I asa saa saa saa 0 aos esa saa ans 0 ene esa saa saa aan NS NS sea saa saa 1974 1975 1977 1978 1979 1974 1975 1477 1478 1979 1974 1975 1977 1978 1979 1974 19F5 197F 197:4 1979 YFAF

l. -_- -- A-1 --------I l-------- E-1 ------- I l--= -- G-1 --------I I-------- a-+

s --------I siation Location NS = Not $ampled Figure 4.3.4 Numbers oflargemouth bass collected per hectare from coves of Robinson Impoundment in August 1974,1975,1977, 1978, and 1979.

ROTENONE LENGTH FREQUENCY DATA FOR BLUEGILL TRANS = A 3 -

29 -- LEGEND 28'- gg77 2r -

26 -

1978 25 -

gg79 24 -

23 -

22 -

21 -

20 -

19 -

IB -

b 17 -

16 -

U 15 -

i

• w I4 -

$ Q- 13 -

12 - -

j ll

'l 10 -

jl (

k I,1 ft 8 -

\ ;jj " i }

7 -

l 6 - II,k! lgl1ll# l; I g 5 -

li l.: 1 1;.1 1,

!g 4

fI' g' b/ ',I;ll Il 1

i b -i\nt 3 ~

~ . I1 i : . rt vl\n,4 . l ial si a

• 41 o

) ,

ts*.htYe ti l  %-L.t* \l\ t si l \c.-

1 I i i l l l l l 1 I l i I i I 3 18 33 48 63 78 93 108 12 3 138 153 16 8 18 3 19 8 213 228 LENGTH

,. Figure 1.4.1 Length frequency data for bluegil! from station A-1 collected by rotenone sampling from Robinson Impoundment in 1977,1978, and 1979.

1M M M M M M ,

M M M M M M M M M M M M

m m m m m m e e e m e e e en e m ROTENONE LENGTH FREQUENCY DATA FOR BLUEGILL TRANS = E

$$ LEGEND _

28 -

1977 27 -

, ,, ,, gg7g 25 Z

- ~ ~ ~ ~ ~ ~

I979 24 - E 23 - II '

22 -

ll 21 -

11 29 -

11 19 -

lg 18 -

gl 17 -

l-I6 ll l

r o is -

it lli 2: $ 84 --

ig ii

n. 83 12

- lI lII il l

I !l 30 -

'g

. ,I lg 9 -

.. It :! lt 8 -

': :..j

' g;j* i,1,1 ,,

7 -

jg f, t 3 [ l10 1 II I r1 ii 1 I l1 ggli p

4 -

. 1

l I1il t h

it 3 -

li .

i I ' ;g.f.l !.. It iI ,i st Ii I I 2

g

! .\

- if liI tt ' *.1 0~1 M' .lR t I

s It I, i t iI I\

g

( <T. .. ..

ii iL i

^4m te._it-1 1 -

i i I I i i i i i i I i i I i I 3 le 33 48 63 78 93 10 8 123 138 15 3 16 8 18 3 198 213 228 LENGTH Figure 4.4.2 Length frequency data for bluegill from station E 1 collected by rotenone sarnpling from Robinson Impoundment in 1977,1978, and 1979.

- _ - _ - - _-_-_----.___)

ROTENONE LENGTH FREQUENCY DATA FOR BLUEGILL TRANS=G so - LEGEND

• l977 2 2 27 _

gg7g 26 -

- - - - - - - 1979 25 -

24 -

23 -

22 -

2I -

20 -

19 -

18 -

87 -

y l- 16 -

i Z 15 -

)

h 14 -

Q~ 13 -

12 -

Il 10 -

9 -

l 8 - P 7 --

if .-

7 . , .

6 -

I - .: .,

g- r- 1! T 4 5 -

,17

• 11 3'44 g 11  !!

4 ~

l lI 1 l f II ll A A I i[' 4 3 -

3 II 1 +

g l:. i1 I/1 1t in 2 -

l I v a 'f .

1. r# k T fk II A f l,Al , W

~

.. $ 's t  %., - t ~. -

I I I I I I 1 1 I I i I i l i I 3 18 33 48 63 78 93 10 6 12 3 13 8 15 3 106 183 19R 213 228 LENGTH Figure 4.4.3 Length frequency data for bluegill from station G 1 collected by rotenone sampling from Robinson Impoundment in 1977,1978, and 1979. ~

IE E E E E M M M M g g .

. g g g g g

I 5.0 Phytoplankton Productivity 5.1 Introduction Phytoplankton productivity and chlorophyll a_ were measured at quarterly I intervals during 1979 as part of a continuining biological monitoring program to gather additional data since the 1978 Robinson Environmental Monitoring Program (CP&L 1979). Comprehensive descriptions and intro-ductions are available in the 1976 and 1978 Environmental Reports (CP&L 1976, 1979) and will not be repeated here.

5.2 Methods Quarterly samples of chlorophyll a,and primary productiv'.ty were taken I in the Robinson Impoundment at A-2, E-3, and G (Figure 5.2.1) . Months chosen for quarterly samples were March, June, September, and December to coincide with seasonal peaks of productivity in spring and fall.

Collection of samples and methods are discussed extensively in the CP&L 1976 Report, but in brief, samples were collected with a nonn.erallic Van Dorn water sampler for subsampling alkalinity, chlorophyll a_, and primary productivity. Temperature and water chemistry samples were taken con-currently also.

Paired t-tests for diffarance in means were used to compare E-3 (discharge station) with A-2 (station near the dam) for 1979 dsta while t-tests for independent samples were used to compare 1978 and 1979 data. Because no data were available for Transect G in 1978, no comparisons can be made with this transect. A probability level of 5% was used as the level of significance.

5.3 Results Integrated primary productivity during 1979 ranged from 62.1 mgC/m / day in December to 745.0 =gC/m / day in September at A-2, 29.4 mgC/m / day in June to 654.9 mgC/m2 / day in September at E-3, and 1.0 mgC/m / day in December to 17.3 mgC/m / day in September at G (Table 5.3.1). A peak in J 5-1 I

I pr vauction was avident in September at all three stations, while the lowest production occurred in December at A-2 and G but was lowest in June at E-3.

The paired t-test comparing E-3 to A-2 showed no significant differences in mean productivity. The t-test comparing 1979 to 1978 productivity showed no significant difference either. Simple correlation analyses showed nonsignificant correlations between total nitrogen and primary productivity of .94 at A-2, .71 at E-3, and .75 at G.

I Chlorophyll a, ranged from a high of 22.0 ug/l in September at A-2 to a low of 0.6 pg/l in September at G (Table 5.3.1). Peak values were round in September and lowest concentrations in March at A-2 and E-3. The paired t-test showed no significant differences between A-2 and E-3 in 1979 and no signifiesnt differences between 1979 and 1978 due in part to the low sample size.

5.4 Discussion I

Annual primary productivity in 1979 for A-2 was estimated to be 263.3 mgC/m / day, for E-3 to be 204.1 mgC/m / day, and for G to be 8.3 mgC/m / day.

The estimated average for the impoundment as a whole would be 205 mgC/m / day based on quarterly sampling. This is three times as high as the estimate B 2 E of 67 mgC/m / day in 1978 based on monthly sampling (CP&L 1979). This is probably due to the low number of samples in 1979 and the deliberate g selection of months to be sampled that would show high productivity. 3 Also, the use of an incorrect efficiency factor helped to underestimate production rates in 1978. There was no statistically significant differenc between 1979 and 1978. bt.t the low sample size would mask all but the very largest differences. Another factor which must be looked at is the lower temperature in the summer of 1979 than in 1978 (Chapter 3) which probably caused less heat stress and physiological impairment of the

=

algae in the impoundment. Temperatures at A-2 in June 1979 were 5 C and l

in September 8 C lower than in 1978, while at E-3 in June were 9 C and in September were 8 C lower than the previous year.

l 5-2 B_

I Comparison of annual production rates in 1979 (205 mgC/a / day) to 1975 rates (278 mgC/m / day) chws 1975 to be slightly higher. As discussed previously (CP&L 1979), the rates in 1975 were prooably overestimated because of overestimation of the available C for C measurements.

Also in 1975, the winter months with the lowest production were not sampled; therefore, a further biae towards higher estimated annual production rates would result. A comparison of rates in 1975, 1978 and 1979 is shos: in Figure 5.9.1. It can be seen that production is higher in liarch and Septeuber than in June or December la all the years. This I would be considered a typical pattern for temperate lakes. -

Productivity was af fected by heat in 1979 with an inhibiting ef fect occurring in June at E-3 but no enhancement of productivity in December at E-3. This was similar to the pattern observed in 1978. Simple correlation analyses showed a nonsignificant but high correlation of total nitrogen to productivity. This high, but nonsignificant, corre-lation was due to the low number of data points available. Nonetheless.

nitrogen is connected to productivity through interactions of nutrient

.g E uptake, temperature, and light (Wet::el 1975), and should follow produc-tion in a definite seasonal pattern similar to that observed in 1978. j The total nitrogen to total phospnorus ratio ranged from 15:1 to 51:1 which would indicate phosphorui limitation especially with the very low (0.01 mg/l as P) total phosphorus concentrations found in 1979. .

I Chlorophyll a, peaked 1x. 211 and is similar in pattern to previous 1975 and 1978 data (Figur; 5.4.2). Highest values usually occurred in fall 3 (September) in all ' aars except at Transect G while lowest values were in winter and sprint (December and March). Transect G has usually the lowest chlorophyll a concentration in the three years also.

Overall, the estimated primary oroductivity was similar to other lakes that can be found in the piedmont and coastal plain of liorth and South Carolina (Tilly 1973) and would be considered a typical dystrophic lake I

based on nutrient concentrations, color, pH, and productivity.

5-3 I

- -- - - _ _ _ __ __ _ _J

I 5.5 References CP&L. 1976. H. B. Robinson Steam Electric Plant 316 Demonstration.

Vol. II. 238 pp.

CP&L. 1979. H. B. Robinson Steam Electric Plant 1976-1978 Environmental Monitoring Program Results. Vol. II.

Iilly, L. J. 1973. Comparative productivity of four Caro 11r.a lakes.

Amer 111d. Nat. 90: 356365.

Wetzel, R. G. 1975. Limnology - W. B. Saunders Company, Philadelphia.

743 pp.

I I

1 .

5 I

I I I i I 5-4 I

I

.. . . _ . . . . . . . . . . . _ . . . . _ _ . . _ . . . .. _ . . - . ~ . . _ _ _ _ _ _ . . _ _ _ _ . . . . . . _ _ _ ~ _ - . . . . . _ .

M -

M M M m m. m m m m -m m a m ~ m' m e i

Table 5.3.1 Primary productivity and related data from quarterly samples in the Robinson Impoundment during 1979.

Month Station Productivity Chlorophyll a Temperature ( C) Total N Total P March A-2 159.5 8.1 19.0 .31 .01 E-3 161.2 5.6 28.0 .25 .01 G 6.5 2.4 15.0 .32 .02 June A-2 82.5 9.4 26.5 .15 .01 ja E-3 29.4 6.5 30.5 .13 .01 u G 8.3 2.5 24.0 .15 .01 September A-2 745.0 22.0 24.0 .51 .01 E-3 654.9 8.7 33.0 .38 .01 G 17.3 0.6 19.0 .34 .01 December A-2 62.1 13.3 15.0 .15 .01 E-3 71.1 7.6 24.0 .33 .01 G 1.0 2.1 5.0 .10 .01 mgC/m / day 2

pg/l 3 '

mg/l

l

/

I

/ '

U. S.1

> 2.5 km 4 I I

O I m ,E 3 h

Discharge N -

(( I I

i I t'.E ep S N '

A

~S < g n

u [u "'."a 7 SR 23 9 '4 1 2 1 I KHometen b 2 km Figure 5.2.1 Phytoplankton productivity sampling staho Black creek at Robinson Impoundment.

5-6

E E E E E M M M M M g. g - g g 4

e

. i se l' i as '

ano . as I na ND = No Data '.'.

as

- = < 10mg C/m 2/ day run as sa e as sa sa sa as na i sa na as an

?* s as se eco . as as sa se

1. en as as a

ci i en i as na un sa E as se as as D soo .ian se as na

= as as E as se i en as .

.I e as

• as as as na as Y'

.$ 400 na es u i as sa

" 2 i se as p na 3 e as as sa sa j;

d- i sa as se ano . na na i as na na F.

as na na i en as i an er sa na .

sa as as se a se se ran + as an as as na as as as -

i na sa e as se na en en sa en sa na na na i as se sa i se sa na sa se ae. as suo . as sa sa se na sa se sa as as na .

i sa as se as as as sa na as na sa se as sa as as as as as as as na se as sa se se as sa sa i se ma se en as se na sa se o na as na as as se as as o sa o as o A Qg i as as sa sa as na se sa as Z se an sa na as as se as as se Z as -na - Z - - ___-Z

- - - - - -__na -- - -=-----______-__-.

- Zas Z A _________

M M M J J J S S S D D D M M M J J J 5 5 5 O D D a A A U O U ES E5 EO E M H H J J J S O D E E A A a o u u f E E E ^l t. k A A A U U u f E E E E E Da:E H V R u N M P P P C C C H H N N N P P P C C C H H k N N N P P P C C C 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 5 7 7 7 7 7 7 7 7 7 7 7 7 5 d 9 5 d 4 S h 9 5 o v S 6 9 5 a 9 5 8 9 5 8 9 6 9 5 e 9 5 8 9 5 a 9

___- -- =- o ...____________. staiton  ;

_____ .. _____ . e _____________ ______________ c_3 ..___________. L I +

Figure 5.4.1 Primary productivity data from quarterly samples in the Robinson Impoundment during 1975,1978, and 1979.

l

-l l

l I

1 ,

88 53 + 88 .

-I I

i SS SE '

l .. .8 l Sa St I

30 + se SA l .. ..

l I S. S.

l 4A et

( St 88 Se i

?? +

i SS SR SS I 48 at R$

l 58 SS BS 24 + 88 RS 38 i SS SS 98 i SS GG SE I SS 80 GG AS 21 + et at me 88 M i es at 88 Se

i .. .. S. Se

,, i SS .. SS 8. ..

c 16 + Se 88 se se at Se p i i

SA AS at Se

.. S.

Se sa a .8 2 i en SS 98 en as na u o is + a. S. 8. Se se as en a ' l SS Se te AS AS 58 SS O i 28 88 St 38 SE SE St SA i u S. SS .. B. .. .. SS 12 + et SS St Et Sk et BE SS te et i St 84 83 S8 98 at S4 85 Sa te 88 8 88 88 Se as Ft te SS 84 Se SS 38 8 84 AS f.S 88 58 SS S3 St AS St SS SS 4 * $4 SR St SR 44 et St GA AS BS Re SS SS 1 38 to te Se et 88 58 88 AS AS SS SA 88 BB i 88 88 59 88 SS BS SG St SS OR 83 AS AS Se as et i SasaseSeat 4e et sa se as se 88 Se as Se as sa Se at 5 + At 88 88 SS SS 48'8B SS SS AS 58 ES 88 SS GA at AS SS at SS i as se se as at as as as as as as sa sa Se as Se at se as as sa 1 as se as at se at as na Se se se as as as Se as as as as sa SS sa i SS te SS Et 88 at 84 SE S4 OS GS 88 Se SA Sa 88 SS DS BS SS SG 88 SE SS at S8 4 + St AG RS SS SA SR 65 d4 SS AS 84 SS 98 Se at SS 84 84 SS SS SE SS SG 84 88 88 SS SA l St St SS SS St At 98 SS SS GR SE G8 SS 38 St ES SS 38 SS SS SF GS R$ SS 38 St GR SS Sa 30 SS AS 45 Se 6 38 at SS es 84 $$ SS GA ES at SS $8 SS 38 SS AS 38 GS AB SS SE LA SA SS SS SA SS 98 SS GS 85 SS SS SS '

i 88 SS et SS SS SE St et Se 48 at as at 89 88 88 SR se SS se SS SS 48 St 84 SS 95 SS et AB 88 SS Re SS Se _.SA ....____.._..

H H H J J J S S S O D D H M M J J J S S S D D D M M M J J J S S S D D f)

A A A u u *) E E F E E t A A A u u u E E E E E t A A A U U U E E E E E E W R R N N N P P P C C C H H A N N to P.P P C C C H H H N N N P P P C C C DATF 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 1 7 7 i 7 5 H v 5 R 9 5 6 9 5 0 9 $ P 9 5 8 9 0 8 9 3 8 9 5 e 9 5 M 4 S 8 9 % M 9

. l-------------- A-7 --------------i 1-------------- E-3 --------------l l--------------- 6 ---------------l S T 4 f lo's

a FiM.4.NIor% a Moss Wrru,5 rte &piNthe ESuMit a519578,E19E E E

I 6.0 Bentaos 6.1 Introduction During 1979 a monitoring program was conducted to evaluate the benthos of the Robinson Impoundment (Figure 6.1.1). Black Creek was also moni-tored above and below the impoundment.

I The benthos communities have been found to be quite variable, particu-larly with respect to the variation in habitats available (CP&L, 1976 I and 1979). It was found in these earlier studies that areas above SR 346 (F-1, F-2, G-l & G-2) had the greatest abundance of logs, stumps, and rooted aquatic plants. Stations G-1 and G-2 were the farthest upstream and received very little thermal influence while stations F-1 and F-2 were closer to the highway bridge and received occasional ther-mal influence during periods of southerly winds. These upper impound-I ment stations had the highest density and diversity of benthos. The stations in the area of the discharge (E- 1, E-3) and the lower impound-ment (A-1, A-2), where the substrate was mostly sand and detritus, were lower in density and diversity. Depth was also found to have some influence on benthos at Transect A. The thermal effluent was found to have an adverse sffect on benthic communities during the late summer months at Transect E.

This chapter will summarize data collected during 1979 and compare them to data collected during previous studies.

O 6.2 Methods 6.2.1 Benthic Organisms I Benthic samples in Robinson Impoundment were collected quarterly (March, June, September, and December) with additional samples taken in January at Stations A-1, A-2, E-1, E-3, F-1, F-2, G-1, and G-2 (Figure 6.1.1) with a Petite Ponar Grab. Samples were either washed or. statica using a I U.S. Scandard No. 30 mesh sieve or returned to the lab unwashed. The sample residue was immediately placed in a plastic container and preserved with 10% formalin solution. In the laboratory, each sample was hand i I 6-1

I sorted; benthic organisms were removed, preserved in 70% ethyl alcohol, and stored for enumeration and identification. Numbers of organisms were recorded to the lowest practical taxon with the aid of suitable taxonomic references.

Samples from Black Creek above and below Robinson Impoundiaent were collected monthly (January to December) using multiplate samplers. Two samplers were used at Transects H, I, and K (Figure 6.1.1). Samplers were set at each station for approximately one month to allow sufficient time for colonization. The camplers were then removed individually, preserved, and returned to the laboratory for analysis. Clean samplers were returced to the water.

Analysis of benthic organisms, following identification, included calculations of diversity (d) using the formula presented by Lloyd, Zar, and Karro (1968), estimates of organism densities, and determinations of taxa richness. Analysis of variance was run on variables of interest and a Duncans multiple range test was used for differences between stations and differences between ycars.

6.2.2 Emerging Insects Collections of insects emerging from Robinson Impoundment were made g biweekly from bisy through October and monthly during November and l December. Traps were set at Stations A-1 A-2, E-1, E-3, F-1, F-2, G-1 and G-2 at a depth of 1-3 meters for two consecutive 24-hour periods.

Preserved samples were returned to the Jaboratory for sorting, identi-fications, and analysis.

6.3 Results and Discussion 6.3.1 Robinson Impoundment Dominant Organisms Ninety of the 127 total taxa of benthic organisma collected during 1979 were found in Robinson Impoundment. The distribution of these taxa is 6-2 l E

NNAN'x5 S 8"8 a .s wt;g $

p wo e " sAa$T r p  %"%% ,$ s %

1. k" %> .S t

1. n 9

9* 1% , M t $5# ,*9 %

gen *' b $ 0 p \ %'%$ \t*

s%'s"

% %j

,r$wg se 'r %e $%g$.

gas vt $g .1 *S "b '$f -

,% %e,ec ,e$* $ +* g *% o,1 4 o7 jM 1. -

o 1e 9e*"o"'s.Q*

/ s*: . -

g ** g.a$

D  %

%*$0*$*

o$ s g.* s #

s$ r  %,4 o >%

/

b $ s "I'* v%% p.

o S $,h " , -

$g,,%"s% e $.s t,g h4, g* "*" -

4s 7 o o d

9 a b ,# #,\3

.o so o o' g. GG % 2 *S S bga - 9<E g %*b o t q vr r $r* "S % c%

e%1 $%

• 13 9 "#p %e

• d b. p $ "g

• e m

t .,  % $;k S "t\ s g t o*

a o* %

h. b ,., o g

5' s %,

e$

To 1 E *g .p e6* Q Y "% $9g*g$

r% q b g $

• • 3 $* s5  % f ~~

r* t "p  %

g9 %g%

,e,

• % S *, sot *55 h  %\

g$ g$ ,

,E 3. 9 <5 % $? %"

$U" 9 o- % ,d i*S l 4 "L

<w

s. 7" _e% g

's*6,,$ s m ' -Ns $%9 $ o%  ?* $ $g ,g%

1 <e.

< .$ *  % # g g

% f., ,p i D r s

% ,d ~s ha"# e ' 7, f

o# %e% 1* b* w a o%

k., .a a%* o& Ce *g *". % %

s4w%

% e

• r f*fo/ @ "%" %.%. 0 o* s s% **

,b

/

/ n%s%g

• o* ?r

$g.  %%e$

G  % %s

$*S g haQ r

• s

,) !jl' e

4 ,l%< s. ..,O

,,, # +

yes k ,g"*4

- s ,,'6 p

g,Xs,**4.%,

s., s.

%zb o

\,f ;< ;ss, Q s%*.  %

,E f

q 9

4

'4, 4,

/

e % c ;s.,

• ;s;s . $%

[% s

.,e s

4 9

s,.;$+ '*'

N ,#g % ,

xh  %

%I#

s!

o,f !' .g% :,'

+

h

's s

,,v.%.

R o 's, c %,;s I+;,*%'O f+ *s -

,, g ' oc e,f .i

% s

• 0, +4 s, $? *s. +. ,

'%. 4

% e e 4 g , +, ' ,, ,,

• ,;4 4

s.

d'"^'* s ,%

.% e ;s "+ " ,

n*0

% , 64.c%+* ,

• <+ ,%,4  :

\s.  ;,

e g'**s, "

,'o s/

g Po s'

4 s,~%c,%R

'~%

4 0

n s

.s #6 4*e '

. o ,4 9 g* , eO C,& '

e 6 s%

, en

, eo.

'l J *4 ,

r+~J ' * ,.,.

• r ys e.Y , 4 ,

c c'% %g A' g*

c

, J ""

R 74

1 I

given in Table 6.3.1. Chironomidae (midges) and Tubificidae (worms)

.g were among the dominant organisms (57. of the organisms collected) at all stations (Table 6.3.2a - 6.3.2k). Other dominant taxa at specific

~

stations were Chaoborus at A-2, Polveentropus at F-1 and F-2, Bezzia/

Probezzia_ at F-2, Oligoch eta at F-2 and G-1, and Hexagenia at G-2.

= Although many other taxa were collected, they represented low percen-tages of the total organisms present.

1 Taxa Richness I The number of taxa ecliected at Transects F and G was higher than those collected at Transects A and E (Figure 6.3.1) during 1979. Stations

~

summaries are as follows:

Hi Taxa Richness Lo

, Station: G1 F1 G2 F2 Al El E3 A2 Average no. of taxa: 31.6 20.2 19.8 18.0 11.4 9.8 6.4 5.8 This distribution shows the r t'ae stallower ctatione at each transect f

(A-1, E-1, F-1, G-1) had a higher number of taxa than their respective deeper stations (A-2, E-3, F-2, G-2). This is probably a result of a greater food supply and/or diversity of habitats at these shallower stations (A-1 = 3 m; E-1, F-1, and G 1 m).

A comparison of 1979 data to previous years shows no significant dif fer-ence from 1976 and is an increase in the number of ta:ta collected over 1975 and 1978:

Year Mean No. of Taxa 1976 7.8 1979 7.5 1977 6.0 I 1975 5.8 5.4 1978 (means connected by the same bar are not sigr.ificantly dif f erent . )

6-3 I

I Diversity Estimates of diversity (d) also had higher values for stations at Transects F and G with lower values at Transects A and E (Figure 6.3.2). f The shallower stations at each transect had larger estimates of diversity j than their respective deeper stations (Figure 6.3.2). Station E-3 had a 3 '

higher than normal diversity during March and June. The high June value was recorded while Unit 2 was off-line and when it was brought back ,

on-line, a decrease was seen in September.

The diversity values for 1979 for all stations were similar to 1976 and were sign 1ficantly higher than 1975 and 1978 and rank as follows over the 5-year period: ,

Year ,

1976 1979 1977 l 1975 l 1978 1

(years, ranked in decreasing order, connected by the same bar are not  ;

significantly different.)

m Density l The density of benthic organisms was greatest at Transect G followed by Transect F with Transects E and A being similar but lower (Figure 6.3.3).

The changes at Station E-3 during June probably were a result of Unit 2 being off-line (Figure 6.3.4). This allowed temperatures at the dis-charge (E-3) to be lower than normal operational levels and provided an g environment suitable to genera usually only found in Black Creek 5 (Neureclipsis, Hydropsyche, and Conchapelopia). Station E-1 also appeared to have had an increase in density because of decreased water temperatures.

It is probable that these lower temperature levels made Stations E-1 and E-3 suitable for a larger number of taxa and a greater density of organisms j

In September, after Unit 2 returned to service (July 22,1979), there l

was a noticeable decrease in the number of taxa, density of organisms,

=

and diversity at E-1 and E-3.

6-4 5

The emergence of adult insects from these discharge stations showed a I similar pattern of benthos distribution: a substantial presence of aquatic insects net normally found at stations during the Unit 2 outage with a decline to no emergence after Unit 2 returned to service.

The density of organisms in Robinson impoundment during 1979 also had a aigniticant increase over 1975 and 1978 but not different than 1977:

I Year 1976 1977 1979 1975 1978 I (years, ranked in decreasing order, connected by the same bar are not significantly different.)

Seasonal Trends For taxa richness, diversity and density the higher,t vala s occurred during spring while the lowest values for these parameters had been during late summer over the five-year period. The spring months repre-sent a period of high benthic activity while the late summer months was

) during the period of greatest ther'ml influence from both natural sources and plant operations, makfng environmental conditions unfavor-I able in some areas of the impoundsent. e Taxa Richness Diversity Density Spring Spring Spring Fall " inter Fall Winter Fall Winter Summer Sumer Summer I (Periods, ranked in decreasing order, connected by the same bar are not significantly dif ferent..)

6-5 I l

- _ - - _ - - _ _ _ - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ ____ __________ _ ____ _ _}

I 6.3.2 Black Creek Of the 127 tot:1 taxa acted during 1979, 85 were collected in Black Creek. Table 6.3.1 gives the distribution of these taxa at Stations H, I, and K. The average number of taxa was highest at Station I (16.25),

followed by Station K (15.5), and Station h (7.25). Although Station H had the lowest average number of taxa, the density of organisms was greatest there (Figure 6.3.5) but the diversity (Figure 6.3.6) was often lowest of the three stations. Stat w. A :sually had the. greatest number of taxa (Figure 6.3.7) and the highest diversity, but the density of organisms usually was intermed1atn between Stations H and I. Station K often had densities below Stations H and I with peak densities from .

March to May. The diversity and number of taxa at Station K vere usually just below that at Station I (Fig *eres 6.3.6 and 6.3.7).

The species assemblage at Station H was dominated by the filter-feeding caddisflies Neureclipsis (35% of yearly total) and Hydropsyche (33% of yearly total) (Table 6.3.21). Station I had a more balanced species assemblage representing many types of feeding habits (Table 6.3.2j).

Station K, which is downstream of .,.ation H, also appeared to have a balanced community (Table 6.3.2k) but the increased organic load from Robinson Impoundment f avored a few more filter-f eeding organisms t'..tn found at Station I. The abundance of these genera were conside. ably a less (Hydropsyche,- 167. of yearly total, Neureclipsis - 67. of yearly l total) than at Station H.

6.4 Summary 6.4.1 Robinson Impoundment Benthic communities were timilar to those previously recorded (CP&L, 1976 and 1979). Transects F and G had higher diveralty, number of taxa, and organism densities, while Transects A and E vere lower in all three parameters most of the year. Exceptions to this were at Transect E during the Unit 2 outage. Density (Figure 3.3.3), taxa richness (Figure 6.3.1), and diversity (Figure 6.3.2) increased durins this period (April to July) at Station E-3 and to a lesser degree at 6-6 E

I Station E-1. After Unit 2 returned to service (late July), a reduction in these parameters was noted for Station F-3 and at E-1 (except diver-sity at E-1). The emergence of adult insects also experienced a decrease in activity at I-3 when Unit 2 returned to service. Some recovery was seen during December for taxa richness and density.

Taxa richness, diversity and density of organisus during 1979 were all I significantly higher than 1975 and 1978.

6.4.2 Black Creek Benthos communities at Station H probably resulted from the seston being flushed from Robinson Impoundment; but Station K showed a return to what would be considered a typical Black Creek benthic community as found at Station I.

I The benthos at each Black Creek station appeared to remain the same as in 1978 with only slight seasonal differences (not significant). All three stations were significantly different from each other for taxa richness, diversity and density of organisms.

6.5 References I CP&L, 1976. 316 Demonstration.

, 1979. Environmental Monitoring Program Results, y

Volume II.

,a Lloyd, M., J. H. Zar, and J. R. Karro. 1968. On the calculation of

, information - theoretical measures of diversity. Am. Mid. Nat.

79(2):257-272.

I I e-7 I  !

l 9

F TABLE 6.3.1 a091NSON SENTHIC 5PECIES LIST F04 TRai$$ECTS AND STATIONS YEAd=1474 TRANSECTS AND STATIONS

, A A EEF FGGH IK 12 1 3 1212 1 1 1 NEMAT 00A x x xxxx x Or.IGOCHAETA x xxx xx OUGESIA-PLANARIIDAE xxx X

LUMA 91CULIDAE DELOSCOLEx x x wtadoINEA xx x xx HYOAACHNA xxx A

3 HYALLELA AZTECA 3 EPHEMERELLJs x x HEXAGENIA X X X X PARALEPTOPHLE9IA x x x STEN 0 NEMA xA x ENALLAGMA x x CELITHEMIS x x EPIT6ECA (TETRAGONEURIA) x x ACRONEURIA A xx PARAGNETINA x X

PTERONARCYS 00RSATA TAENIOPTEHYx x PERLESTA xx 3RACMYCENTRUS NUME405US A HYOROPSYCME xx xxx MACAONEMUM x NEURECLIPSIS X x xxx El CHIMA94A X l OXYETrIRA x x xx HYOPOPTILIDAE A x OECETIS x xxxxxx xx oHYLOCENTROPUS x xxxx POLYCENTo0 PUS X X X X X X x x HYO90PSYCHIOAE PUPAE x NEURECLIPSIS PUPAE x' 9E405US x x x ELMIDAE x xA STENELMIS x xx OEZZIA/RRodE?ZIA X X A xxx xx CHA060HUS xx xxx x x x-DONACT? x TABAvIDAE (CH4YSOPS) x COLLEMdOLA xx

-SIMULIIDAE LAPVAE < x x g A6LAHESMYIA x x xxA xx A x x g CHIRONOMUS x xx xxx CLA00TANYTaasus x xx xx x x CL NOTANYPUS x x xx x x 6-8 E

7 l

6-9 I

i ) SI7tive0 bel SI13 YEA 0dibidO3 y y y v sy v i v173AMSA00r3A y Sn!Ov730SSle10e315e v x ve3300973 y 700d3dO3 y SDiv031evA AANueADHD y y SdQWA010 ' ~

y y v y y v y s3dION3101oAe3 y y Snin3NIO v SIN 393

> y y 3v01137F-S!13te y y v sy r y v vv we133Seoe31n y y y y x Sno01031e30r.31H y x 3v010Ien3 y y VISev7 y 311r e31ve OINIev3780Ah y viv11dv3 ve0wdoNv95vHe y vy y > r SG107730H160 y y V W13 do uv'13 y vy y x v!F35107v2 3 y y x v vy (x Owlen) Sn>3N30Ie13n E y y v IN!n0NOMIH3 010 y y y y Sno0N0eIH30003Se 4 y y y y y y y 5hdO103Ie3 Y Y Y y ) 3vehe OIWON0d!H3 y y y vidO73dvw3NO3 y v!AWI73eAv2 V y y VINIONndbv7 y y y ven3NONAe03 g-Y v773INvW3N31H1 g y y S3dION31vbvd Y y y v y 53d10tG10e31n '

a y 5073eldi y y y y y Y y SOSev1ANv1 y y y son 0N0dIH30N315 y y SfiSdv1AHv103He g y y y y v y SnIOv730d133So u y y vvy v y y 501077306d y v y y vv vv r y y H07103dA70d y Y Y y SOr40N0d t h3v ev e Y Y y y ) y y y y Sn10v730NvN y v y y v773Ie3dd3!xn3 y y y y y y y y y 53dION3106310 l y y Y y 4 y y

• Y SDw0N0e!H301dAe3 m y y SOdANv107303 53133d5 I I I212 IE I2i

> Iw PO/4 33vv S's011 v 1 C Odv S133SNvel bl61 ev SN011v1S Ohv S1335*.' vel e03 1517 53133d5 31w1NJ4 90SNie0e ('3uco) tac 9 31svi I

L I

1v678* 9'C* t )sou2-( r6-!N50h 93 tiwlO 5e33135 7151 309 letMS331S vNO 51v110NE 43tw=t626 1nvN53315 SNO 9lvitoNS vv334 3 09H !> I 12t t t2 121 1 1 5d3s*135 I

i dvev3e1301ednS y l3nolav Y Y 73d103HIdoNowtf S x 5113103HlMONOWAS 01Ad1013NOId3S 30eA0vi~nS 30oNnins v Y Y y i

I 3dI30ecn7IV delh33eS y 33eD373v 5d' 3H*31037101nS 5e' H3Sd3e030eliv se*

x x y

v i

y Y I

LAbINnS 5d*

03H13eAd103rleONOW05 eH303d!301OdnS

> Y y y

V y Y Y I 37700o31W*

de037vCInS 993edvNJ Nv!010v3 y

y y y Y y Y >

y xY Y Y Y y y Y y y xY 1

Y I

inelJ1310v3 y Y 03eO x eels 11NV Y Y 0eiH037vO I r Y 7IWN00e11nS H033w3!s13}

DN* Nd' 31N33701v 3INd3701v Y Y y

Y Y

I 931333e01n5 0nY 7nna*13A710vs e15101nH 3Hel01073 v

v y Y v I

xxY dS3000l' INN 0ew11v nA5lv31035 TN15Od13Pv y

y

) I 2AOOd23nv Y Y SdHv3elO 37vH OGAIFvoH!r ellivig x Y

95371nS v evMvd0ANx x

d733CdA3ev I

I 9-T0  !

~

I I T AOLE 6.3. a 30alNSON sENTHIC SJECliS DENSITIES IN OF0EA 0F ASUN0aNCE YEAAsl470 MONT-sALL wofJ f *S F %. VEaw TRANSECT / STAT 10Nsal DENSITv JE*CE'4T

=/$>d 0F TOTAL SPECIES I .......

204.T 36.e4 ABLASESMY!A 40.72 PROCLA0!VS 1.14.s

-5.s S.91 CMIEONomus $.65 I TU61FICIDAE POLf9E01 LUM PWOCLADIVS ASE44 ANT

• e.*

Jo.d 6.e5 5.38 3 33 22.e I CRYPTOCM140N09US DICROTEN0tdES CLIN 0TANYPUS 19.9 17.2 16.i 2.el 2 65 2 30 OECETIS 15.6 2 30 I CHA090005 PHYLOCENT 0 PUS OLIGOCHAETA 13.1 d.n 2 96 1 2*

12s 6."

NANOCLAOIUS I NAIO!OAE SE2ZIA/P40GEZZIA a.9 a.4 5.d 1.u2 1 02 0.77 POLYCENTROPUS s.2 0.17 I 41C20PSECTaa T Ai.f T APSUS CRYdTOTEN018ES 3.e 3.*

3.e 0.

9 60 0 50 0

CRICOTOPOS I

I .

I 6-n I

I I

I TaaLE 6.3.2b 40HINSON SE*1TelC SDECIES CENSITIES IN 040Ed OS AduNOANCE YEAwslo79 *0NTHsALL MONT*S Fvw YE u 14ANSECT / STAT!0NsA2 DENS!Tr aE*CiNT  !

SPECIES

• /SU = OF T O T r.L  !

i TUSIFICIDAE 376.7 e<1.e4 800CLA01US 132 3 21 39 CHA000duS 59.d 9 5* 3 CHIAUNOMUS 16 1 2 59 g nee 4 A T 00 A 9.9 1.*5 m!AvoINEA 4.0 1. 5 VEJE0VSKYELLA 33 1.s= E EPHt. e EE ELL A 3.c 0. :ia 5 OE40 3.6 0.58 POLYPEDILUM 1.m 0.29 NA10!DAE 16 0.29 MICROPSECT4A 16 0.29 BAET!3-0AET10AE 1.s 0 29 I

5 I

.I I

I em I s

1 1

I  !

l I

I T A6LE 6.3. e 200!NSON SENTmIC $PECIES OENSITIES I'd OPOE4 0; ABUNOANCE YEAd=14T9 40NTwsaLL auNTwS F0w ftaa TAANSECT / STATIONsEl OENsITr EmCENT SPECIES - =/50 A 0F TQTAL I AOLfPEDILUM MICROCRICUTOPUS PROCLA0!VS A9EAAANT 6e7.7 213.3 154.4 36.A8 15.41 11 32 A6LA4ESMYIA 125.J 9.34 I TUO!FIC10AE NANOCLADIUS 80.2 66.7 50.0 5 96 4.de 3 80 O!CQ0 TEN 0!AES I OECETIS BEZZIA/P40dEZZI4 CRICOTOPUS

• 5.a 14.5 17.6 3 36 1.=o 1 31 PPUCLA01US 11 7 0 87 I CNIRONOMUS CHAETOCLADIUS SP.

11 7 9.a S.9 0.67 0.73 0 4*

POLYCENT40 PUS I NEU4ECLIPSIS MICR0PSECTRA CRYPTOCHIRONodVS 5.4 5.4 5.5 0.44 3 64 0.e4 CLADOTANYTAASUS 5.* 0.e*

I GHEOCRICOTOPUS NIauoINEA 4EA05US 3.9 3.4 3.9 0 29 0.29 0.29 4 15 I STICT0CHIwChouuS 2.u PSEU00CHIRON0405 2.0 0 15 PAISTINA 2.0 0.15 0x1ET-14A 2.0 0 15 I ORTHUCLA01U5 NEw A T00 A NY0dCPSYCmE 2.0 2.0 2.0 0 1$

0 15 0 15 2.9 0 15 I CLIN 0TANYGUS CLA00CEAA CHIJONOMIO PVAAE CHA0404US 2.a 2.0 2.o 0 15 0 15 0 15 I

I 6-u I ,

I I

T AdLE 6.3.2d 2081NSON SENTw!C SPECIES 0>:NSITIES IN 000Es CF A90N0aNCE YEakslo79 .iGNT.saLL :iONT-$ FOR f E a,- <

Twat.5ECT / STATIONsE3 II 1

, OFNs1if DE* CENT a SPECIES

=/50 w 0F TOT 4L g

1 POLYAE0'Lud 70.5 31 22 Tud ! F ICl.0 aE *1 1 17.$2 C4YpTOCHIAONOMUS 21 5 9 22

• ICROCRICOTOPUS 17.3 7 56 AHLASESMYIa 13.7 9 87 PROCLADIUS 11 7 5 02 3 NEv4ECLIPSIS 9.a e.20 g Po0CLA010s a9 ERRANT 7.8 3 36 w!CPOPSECTRA 5.9 2 53 OICROTENDIPES 5.9 2 53 E CRICOTOPUS 5.+ 2 63 5 CHA0HORUS 5.4 2 53 T Ar4Y T A ASUS 2.0 0 66 g PQLYCENTRUPUS  ?.0 0.36 0.ee g

OPT *0CLA0 1 2 . ')

OECETIS 2.0 0.en NA!010AE 2.) 0.86 E HYORODSYCrE 2.9 0.66 E GLfaTOTEN0! PES 2.0 0.es EUK IEFFER I ELL A- 20 4.96 I

.I I

I I

6-14 I

1 I T AoLE 6.3.2e 30-!NSON MENT *!C SPECIES DENSITIES IN 0:0Ed 03 A8uh0ANCE YEAd=1974 MONTwsALL MUNT-S F0w f t. A A f*aNSECT / 5TaTIONsF1 DENSITr sEWCENT SPt.CIES */SJ A 0F TOTAL

1. ACCLa0IUS 36G.e 14.73 CN!JON0eUS 233.* 15 17 50s.YCENT40005 1563 0 9.en 1=7 1 7.84 I CLA00TANYTA45U5 TUdIFIC10aE CLIN 0TANYoVS 117 95 1 7.59 5 09 4.32 MICR0 TEN 0! PES 60.7 I A8LABESMYIA OECETIS EEZZIA/PQ09EZZIA 73.o e6.-

66.*

3.96 3 55 3 55 55.6 2 9e I OICFOTEN0!aEi NAIDIDAE PHYLOCENTdOPUS 46.5 el.3 28 7 2.s9 2 21 1 54 9tC90PSECrPA I vEJ00VSKYELLA POLvpE01 LUM CRYPTOCHIRONOMUS 25 1 25 1 23.3 1 34 1 36 1 25 14.. 0 ,77 I PARATENDI8ES PSEu00Ce!20N0*us ZALUTSCHIA 12.s 10.a 10.4 0.67 3 56 0.58 CH4000905 I MICP0CPICOTOAUS CAYATOTENDIDES T A44YT ARSUS 9.1 9.d 7.2 0.*e 0.48 0.39 CH190NOMIO PUPAE 7.2 0.39 I PouCLAOIUS Asf.4AANT "EXAGENIA CRICOTOPUS 5..

S..

i.s 0 29 0 29 0 24 0.29 I CELIT*EMIS 5.-

PSECT40CLAOIUS 3.* 0 19 -

OAYETw1RA 3.c 0 19 NANOCLA01US 3.e 3 19 I Cr4 AETOCL A01U5 SD.

TPleELOS PELOSCOLEA 3.,

1.a 1.-

0 19 4 10 0 10 NE*AT00A 1.s 0 10 I METEIOCNENUS (0df-0 x)

LINN00wILUS M'1FF9EISTE*I 1.-

1.:

13 4 10 o . l ')

n.10 Midi 0!NEA mESPE40 CORIXA SP. 1.4 0 10 OEA0 1.s 0 10 AEROSUS 1.* 0 10 I 9AET15-9.AETIDAE 6-15 1.a 0 10

I I

I TABLE 6.3.2f 40BINSON TENTHIC SPECIES DE'ISITIES IN 040E9 0F AeuNDANCE YEAN=1479 dONTM*ALL 90NTws F09 ytar TRANSECT / STATIONsF2

. OENSITf sEdCENT g d /50 '4 UF TOTAL g SPECIES ....... ..........

313 7 19.68 I

CLA00TANYTaaSUS ZALUTSCHIA 213.2 13.38 g PAOCLA01US 131 2 S.23 g SEZZIA/AR04EZZIA 116.6 7 20 92.J S.79 OLIGOCHAETA POLYCENTR0GUS 86 1 S.*0 g CHA080QUS 77.9 4.89 3 75., *.76 TUBIFICIDAE OECETIS $5.6 4 12 CRYPT 0 CHIA 0NOMUS 67.2 2 46 l CLINOTANY9US 47.d 2 96

• NAIDIDAE 35.9 2 32 VEJ00v5KYELLA 32.e 2 0o g NANOCLA0105 30.1 1 93 E CHIAuNOMIO ouPAE 26.7 1.do ARLABESMYIA 26.7 1.$6 E

22.n 1.-2 1 42 5 POLYPE0! LUM DICA 0 TEN 01 PES 22 9 MIC90TENDIAES 16.. 1 03 CLA00dELMA le.- 1 03 g STEN 0 CHIA 0NOMus 12.J 0.77 g MICPOPSECTAA 12.3 0.77 CHIWom0MOS 12.J 0.77 MEAAGENIA 19.3 0.e5 E OAir0CLADIUS 4.2 0.51 R PAOCLADIVS 69ERQANT A.2 0.39 ^

CRYPTOTEs0! PES 9.4 9.39 TANYTALSUS -.1 0 26 NE=AT00A 4.1 0.26

• ET;10CNEMU4 (04TmQ A) 4.1 0.26 drE0CGICOTCPUS 2.1 0 13 g PSECT40CLA01us 2.1 9 13 g PHYLOCENTdO305 21 0 13 MICPOC91COToduS 2.1 0 13 LIMN 0041LUS MOFrHEISTERI 2.1 0 13 NYALLELA AZTECA 2.L 1 13 GN. uw. EINFEL0la 2.1 0 13 I

6-16 E

I I T AdLE 6.3.2g PO41NSON 9ENTMIC SPECIES DENSITIES IN OADER OF AdONOANCE YEAw=lG79 MONTmuALL aCNTas FOA fE4A TR ANSECT / $7 ATIO'4=G1 OENSITf *E* CENT SPECIES s/54 9 0F TOTAL 639.9 13 17 I CLA00TANYTAPSUS PAOCLADIUS ZALUTSCHIA 3e2.e 355.2 le3.3 10 36 10 14 6.e6 VEJ00v5KYELLA I SEZZIA/PROSEZZIA CRYPTOTENDIPES MEAAGENIA 137.v 129 2 127.4 3.99 3 69 3 64 A6LABESdYIA 122 1 3 48 I PSECTPOCLA01US O!CR0TENotoEs HYALLELA AZTECA 113.0 109.4 107.o 3.22 1 12 3.C7 2.+7 I TV4IFICIDAE POLYCENTROPUS CHAETOCLAOIUS SP.

104.1 10e.1 66 1 2 97 2.*6 PHYLOCENTHOPUS 71.s 2 05 I CLINUTANYuVS OPT *0CLA0 1 POLYPE0!Lud 70.u e4.2 54 2 2 00 1 9S 1 69 55.5 1 69 I PSEUDOCnI40NOMUS OXYET* IPA PAAACRICOTODUS e5.9 S3.-

au.4 1 54 1.S4 1 29 MICAOPSECTRA I NEMATODA NAIDIDAE CHIPON09US 34.5 30.i 29.7 1 13 3.e7 0.82 TA8ANIDAE (CndVSOPS) 17.4 0 51 OECETIS 17.4 0 31 I- OUGESIA oLANaaIIQAE 17.4 0.51 CAENIS 16 1 0.-6 14.= 0 41 I SPHAE4IO CLAD CRYPTOCHIAONuuuS CdlCOTOPus la.-

1*.*

0.*1 0.41 MICHOTENDIDES 12.o 0.36 EPITmECA (TET4AGONEUdIA) In.e 0.31 10.4 0.31 CHIRON0910 PUNAE PHE0CPICOT0 PUS 3.0 0 25 9 . ') 0 26 I PAHAP0YNX MI4UDINEA 00NACIA 9.v G.o 7.d 3 26 0 26 0 21 CHA0 Hocus I TANYTAASUS PARAce!A0NOMUS S.a 5.6 0 15 0 15 6-17 I 4

I I

I T AsLE 6.3.2(cont.)'ve IN50N sENir'IC SDECIES GENSIT155 I:4 OADEw or ABUNOANCE YEAns1979 MONTasALL *QNTm5 FQ4 fEaw T4ANSECT / STAT 10N=01 DENSITY PEPCENT SPECIES =/50

• OF TOTAL MEIFFEa u tus Our 5.- 0 15 HYORACA4th!D wATE4 *ITE 5.- 0 15 E0PAAAAGY4ACT!s 14407ATALIS 5.* 0 15 JAAALEDTOP-LE91A 3.e 0 10 5 NANOCLA01US 3.o 0 10 3 EINFELOIA 3.5 0 10 ZYGOPTEaA 1.1 0 05 740CLA0105 ABERAANT 1.s 0 05 PISIDIUM 13 0 05 03THOCLA01US 1.s 0 05 OLIGOCMAETA 1.3 0 05 3

'4Y ST AC IDES 1. 0 05 E MET 3IOCNEuVS (0oT-0 A) 1.s 0 05 LUNA 4ICULIDAE 1.d 0.05 LEPTOCHIdoNo4us 14 0.05 LadduNDINIA 1.i 0 05 nV000PTILIdaE 1.x 0 05 HESPEQOCow1xA SP. 1.- 0205 mi GN. NA. EINFELOIA 1.A 0 05 g ENaLLAGMA 1.- 0.05 ELdICAE 16 0 05 010VMOPS 1.s 1.,

0 0.05 W 05 l OEMICdYoTQCwla0NCduS COELOTANYPUS 1.- 0.05 CLA00CE4A 19 0 05 m CELIT*EMIS 1., 0.u5 14 0.05 g-ANIS 0PTEJA I

I I

6-13 E

I I

I T A ALE 6.3.2h a04tNS0N 7ENTHIC SPECIES DENSITIES I !a ODOE4 Of ASUNO A* ICE fEAnslo79 *0Nin=ALL 90NrwS F04 ygAs TJANSECT / STATION =G2

. DENSITY dEdCENT

.$ .. .. . b I ZALUTSCrIA 1202.-

900.7 37 10 26.*7 CLADOTANYTAGSUS S.72 I TURIFICIDAE NEXAGENIA PDOCla01US 19*.o 169.9 151 6 5.47 6.-5 6.35 POLYCENT20 PUS 144 1 I dE221A/P40$EZZIA AwfLOCENTRODUS POLYPE01suu 124 2 63.9 St.7 3.do 2 02 1.52 51 7 1 32 I A9LA4ESHYIA CRYoTOTENGIDES CHA000RuS 29.3 2*.1 20.7 0.ee 0.71 0 61 DICROTEt40!aES 0 51 I MICAUPSECTaa SPwaE410 CLai4 COPE 200A 17.2 15.6 15.5 0.*e 4.-6 NEMATODA 13.s 0 61 I NAIDIVAE VEJ00v5KYELLA OECETIS 13.1 12 1 12 1 0.61 0.36 0.Je 12.1 0.36 I CDYPTOCHIAONowuS GLYPTOTENGIDES CLA00PELMA 4.6 a.e o.G 0.25 0.25 0 20 DSEUDOCHIJON0wuS I PISIOIUM HYALLELA 4ZTECA 00GESI A-PL Atl Ad IID AE e.4 5.2 5.d 0.20 0 15 0 15 36 0 10 I S T ENOC.w l a0NONU S OKiET= IRA OLIGOCHAETA 36 3..

3.=

0 10 4 10 0 10 NANOCLAO!US AICPOTENOIPES 3.* 0 10 t ASELLUS 3.= 0 10 AELOSCULEs 17 0.05 044aCmIE0009u5 17 0 05 LEDTOCHIAON0du$ 17 0 05 17 0 05 mIeu0!NEa 0.05 i OIDYduPS 17 17 n.v5 COELOTA.4fAUS l

6-19

. __. ._, ~..

I I

T astE 6,3,21 409INSUw *ENT.!C S;ECIES DENS! TIES I

la 0dOEw Oc acuNuaMCE YEans1979 MUf4TMaaLL *0NTai fod YGA T4ANSECT / STATIuNewt CEN51 E4 CENT SPECIES . =/50 4 Of TOTAL NEUPECLIPSIS eh.7 3. 92 MYOR0ASYC-E $59.T 33 11 00GEsta ataNAJIIDAE 2s9.4 16 57 DOLYPEDILUA 238.7 12 00 ORTHOCLa01US 22.e 1 16 GYRINUS SP. 16 1 0.76 OINEUTUS 12.2 0 01 g C A IC OT ov'JS 11.3 0 52 g VEJ00v5KYELLA 6.2 0.*1 NEJdECLIPSIS oupaE 6.. 0.32 ABLA9ESMY!A 6.1 0.31 EUKIEFFE41ELLa S.. 0.27 E0P a A A AtiYE AC T IS IJWO4aTALIS 2.3- 0 12 PSECTROCLa0fuS 14 0 10 g CRYPTOTEN0l#ES 17 0 09 g C04YNONEUwa 1.s 0 08 CONCdapELopta 1.9 a.08 AC40NEU21a 1.e 0.08 E MICAOCRICOT0AUS 12 0.00 5 MYO40PSYCm!OAE PudaE 12 0 06 SE405U5 1.2 0 06 Nat40CLA01U5 11 0 06 CMAETOCLAG105 SP. 0.e 0 06 ZALUTSCHIA U.e 0.03 STENELw!S a.e 0.03 g ASEUDOLIANOP*ILA 0.o 0.03 'g OtHIRAPwla VITTara n.e 0.03 OICROTENotDES 0.e 0 03 CRYDTOCmIo0NOiUS n.* 0 03 STEN 0NEva 4.. 0 02 SI 4ULI!0 AE L A4V aE 0.. 0 02 RrEOCAICOTOPv5 0.- 0 02 MET 319CNE*v9 (04Tdo *) 0.. O.02 I

t l

l l

6-20 g

I I T A6LE 6.3.2j 2091NSON SE'afw!C SPECIES DENSITIES tiv os0EH OF ddVNOANCE YEAWs1979 wuNTasALL 8:UNTWS row yEag I T4ANSECT / STATION =It DEMITf dE* CENT 0F TOTAL SPECIES s/50 9 M*C40PSECTEA 121 6 15.30 DMEOCRIC0TUPUS 115.6 16.e2 00Lf9E0! LUM 81 9 10 30 oS.1 I CO2VNONEUeA 4 29 so.9 v, .15 EUKIEFrEWIELLA 3!*ULIIDAE LA-VAE 66.3 S.o3 uET2!OCNEMUS (JRT-0 () 36 3 4.ee I MYOAOPSYCHE TANYTAPSUS awe 0TANYTAwSUS 26.1 23.3 20.3 3 03 2 43 2.s5 19.2 2 42 I CONCHAPELOPIA PAAATEN0!eES CLA00TANYTAOSOS 14.6 IT.m le.6 2 36 2 20 1.d4 VEJ00VSAYELLA ABLA9ESHY!A 1*.e 1 9*

OETMOCLA0!US 16.s 1.62 STENONENA 9.9 1 25 4!C40 TEN 019ES A.9 1 25 I N Af40CL A0 !VS EumE*EdELLA ASECTA0CLA0!US 5.5 o.5 a.+

0.d2 0.e2 0.el I PAEALEPT09-LE91A 3.- 0.o1 NEU'ECLIASIS w 5.* 9.6e THIENEuaNIELLA S.) 0.e3 ACRONEUAIA *.1 0.52 I pes (ESTA CHAETOCLAD!us SD.

PSEUDOLIMN04*ILA 3.e 3.6 3.s 0.*e 1.*e 0 44 2.4 0.36 I STENEL*!S OECETIS ZAvdELIMYIA 24 2.3 2.3 a .3e ,

0 29 1 49 LEUCTda CPICOTOPUS 2.3 9 29 T6ENIOPTEJYa 1.d 0.26 AAAACHIRON0aVS 1.T 0.21 6AACMYCENTAUS audE40SVS 17 0.21 I eEZZIA/PdO8EZZIA PHASGANuP-0AA CAPITata LA64UN01Nia 1.T 12 12 0.21 0 15 0 15 HY040PTIL10AE 12 0 15 I- GN. "M . EINFEL01A 12 0 15 C04YOALuS C0d4UTUS 14 0 15 6-21

- g. _ -

1

I I

-I T A sLE 6.3.2j (cont) 609 I NSON SENTa!C SPECIES DENSITIES IN 000EA 0F aeUN0ANCE YEAws1979 MONTmaALL MONT*S F04 fiaA TAANSECT / STATIONall OENSITY #EWCENT l SPECIES */SQ % OF TOTAL EwPIDIDAE 11 0 16 ELMI0aE 9.o 0 10 UID CmIdON0*INI A 0.5 0.08 PTE40NARCVS 00ASATA 0., 0 0d 3 POLYCENT40 PUS 0.6 0.08 g PAPAGNETINA 0.o 0 08 ,

LAASIA 0.o 0.08 HYOAACHNA 0.e 0.08 METE 40TAISSOCLA0!v5 0.6 0.08 COLLEw90LA 0.6 0 08 CLIN 0TANYPUS Cw!40NOMIO PUPAE 09 0.e 0..

0 08 0 08 0.05 g) g OLIGOCHAEra l EPITMECA (TETaAGONEUPIA) 0.. 0 05 ENaLLaGMA 0.6 0..

0.05 0 05 l'

m CEdacLEA SA.

5 Bl, i ll l .l >

l I l

l l

l I

l 6-22 1

sl

7 I f a iLE 6.3.:k 20 DIN 50N dENTn!C SPECIES CENSITIES IN uGOEd 0F A8vNDANCE I YEANs1979 MONTrsALL =0NT-5 Fod YEAW T2ANSECT / STATION =K1 DENSITY PEdCENT m/Su a 0F TOTAL SPECIES ....... ..........

101.. 16 65 EUMIEFFE41ELLa 96.d 15 57 MYOPOPSYCrE 76 3 12 20 POLYPE0ILUM S.72 53 1 I C0dvNONEUA A NEudECLIPSIS AHEOCAICOTCPUS 36 2 31 5 20.5 9.95 5 17 3 37 C41C0f0 Pus I AdLAsE54YIA CONCmaPELOpla YANYTARSUS 20 1 19.e 17 2 3 30 3 25 2 82 16.5 2 71 I OpTHOCLA0!V9 vEJ00v5nYELLA PERLESTA 16 1 16 1 91 2.e*

2 64 1 69 MAC20NEMUM 1 46 I

S.9 STENONE4A 6.7 1 10 PLECOPTEda 6.2 1 02 ACRONEURIA 1 00 STENELHIS 61 53 0.92 85EU00LIMNUPHILA 6.- 0.72 SIMULIIDAE La4VAE *.* 0.72 NANOCla0105 3.4 0.c4 I GECETIS CRYATOCHI40N0405 MICA 0PSECTQA

?.9 3.J 3,3 0.o4 0 54 0.be LA45IA 2.% 0 63 DadACHIA0Nouus 0 36 NAIGIOAE 22 EMPIDIDAE 1.e 0.30 17 0.29 I ASECT40CLA0!us LABRUNDINIA AMEOTANYTAP5US 17 16 11 0 2e 0.25 0.1d METd!OChE9US (OoTm0 0 11 0.lo I CPYdTOTENOIDES 9AETIS-BaETIDAE UID CelR0now!NI a 11 0.7 0.7 0 18 0 11 6 11 ELsI0aC I CLA00TANYTARSus itMIFICIDAE TRI?ELOS 0.7 0.e 0.4 0 11 0 10 0 10 0.n 0 10 I P&WALEPT00 ALE 31A NE*ATODA LUuAHICULI0aE 0.e 0.e 0 10 0 10 I 6 23

r-I I

I T a st E 6.3.3(cont) e c a I N50N 9ENTm!C SPECIES DENSITIES I4 OGOER or a6uNDANCE YEAAs1979 MONfasaLL "CNiwS F0H fEa4 TAANSECT / STATIONzM1

, DENSITY *ERCENT SPECIES */SQ w 0F TOTAL EPICOR00LIA PdINCE85 0.o 0 10 OINEUTUS 0.o 0 10 OICR0 TEN 018E5 0.e 0 10 COHf0ALuS CORNUTUS 0.e 0 10 3 COLLCMHOLA 0.c 0 10 E CH I;4 A A A A 0.e 0 10 SEZZIa/P400EZZIA 0.6 0 10 ANCYGONYX V 421 Eiia T V5 0.o 0 10 STENOCHidON0995 0.- 0 07 OLIG 0 CHAETA 0.6 0.07 I

L l

I I

l I I

6-24 l

s.

I U. 5. I b 2.5krn I _

Transact G

• 1 Traneect F Tr sect E

, 5 o i

Dier. harp

\ '

I

/ ,

I ./

I i g

'O

\ /

I N A

O Ash Pond I H. R. Robinson u 2 .

TwectA 25 9 4 1 2 p Transact H Kuormters

> 2 km i

Transect K at ek creek Figure 6.1.1 Benthos sampling stations at Robinson Impoundment.

g' e-2s

I I

44 -

42 - G j1

/

40 -

1 l l 38 -

I I

/

36 /

/

,, s * *%%  ;

34 -

% /

r#. f 32 .

/ \ /

l \

/

/ \

/ \ /

30 . / \

\

/

/ \ /

/ \ /

23 - / \ f

/ \

m / /

u \ f j 26 -

/

,/

\ I

/

o \

U y %1 n

s/

y s

3 y2 G g 22

.. ... F-u

..- ~ ~ . .: . ...'-

l 3, 20 . _.

.a; ~ F 4 e - ~~'~~*U*....- *

'a. 18 -

H 16 . . ** .A1 i

y---- ,

s ,...'*

....... 3 14 -  %

/

'ss ,. -

,,, , , E 1 l 12 - .

j s , -

/ .* . . -  %. .a 10 -

. ,/

/. .

..- , . ~s l ',

g _

i .

./ s.g .

/ / s.

/ s. s g.2 i

/

.'..'...,,s -

I 4

E-3 5

5 2 -

1 r

0 , ' ' i Jan. Mar. Jun. SeP- Dk Figure 6.3.1 Total number of Robinson Impoundment benthic taxa collected from stations '

A-1, A 2, E-1, E.3. F 1, T-2, GI, and G2 during 1979.

1 6-26 I

5

I I

I

~

4.50 -

- ' C*l I

a /

~ /  % /

s ~,.. s s

s 4.00 -

/ '%'

,, A. /

s(

I ~ . o.

/ i s 4.

~.

~.

..............,....s.- M

/v, t .

. .\s..... ,.

I 7

.c 0

o3.00 -

.. ...... *.... *'.. \

%. ,s

.\.

s

-s.

N.v./

2.50 \ F2 1M , . . . .

.. A 1 3.00 -

....**/~d . . , , . *..-

I 2.50-

/

,\

g ,.-

M

/

f -E1 s /

2,00 / . .. /. .r .. s s g / .

s,  % /

- / -

s -

/ s u

/7 s* 's I

3* 501 -

s - A.2 g.3 y ~ ~. . .._.

1.00 -

I 0 Jan.

Mar. Jun.

Sep. Dec.

I .

Figure 6.3.2 Dintsity esdmates (d) of Robinson Imix>undment benthL oO collected j at stadons A 1. A 2, Fel, E-3, F.1, F 2, G-1, and G 2 during 1979.

I l 6-27 1

I 6000 -

~

5000 -

l '.,

4000 -

,/ '.

fg -

l

.- ** G 5 .

o .

5s 300.T -

l l '.

2~ t  :

9 .

~ ~

l ./

F

. ./

/

2000 - #

/s. '

/

.' N. .

/

.' s *

/

./

'e' N. *. -

.\ - #.s-s.

-A W 1000 - ,e~~~. E I s  % /

s' l  % #

500 -  %, a s

~,

BO - ~**,

O s a a n s Jan. Mar. Jun. Sep. Dec.

i i Figure 6.3.3 Density of Robinson Impoundment benthic organisnu at transects A. E. F, and G u t dnring 1979. . _ _ _

{

l I'

6-28 E

I L

g E l';m {.

,4

/ \

t u '

/

/

\ 1 61 ,

/

/ /

\ i W

• t I

\,  !

/

E s'

/

\ /

/

G - i

( /

i

! \ p E E \

/

y 3000 -

\

/

3 , /

f

,Q t ' Fi E ~ -

. e.

\' - ---

t . G#

/ '\ F7

,. . r' :s '

E 2000 -

./.

\

h.....

r.. i s.,

/. _.

E .

\

/

1000 -

\-

/ l g ,/

E 500 -

\ j' 250 - V E -

3000 l\

'g E -

/

i

\

j

/ \ < E-1 g 2000 -

/ \

E  ! s 4g I

\

s i

c .

i \ ,%

I '

b

\< ' '

E .

,' , '#\ ,' ' x,

}1000 I

t o

- i r '

. g .. A. g

- t

' D' "" ,~ x.:

.,:.-:.7. .

500 -

s0 -

l ,

Jan. y, Jun, g

- g.3 E 63A Density of Robinson i *'

A 2. E-1. E-3 F-1. F 2. kiG2 u gisnis at stations A-1, E 6-29

l I

8000 -

. I 7000 -

~

I

- . \ I i

5000 -

~ -

l 1

i I

~6 U

O -

.A 3000 -

A  ! ,

l

! ,t. \ u I \ I.

\

! \.  ! i 5

/ \.  ! i E 2000 -

/

,f g

,/ i

• 3 /

\f

\ .1 \

!g\

/

I s N

g /

/ ,i \

\! 't

/ 4 , \

'N.

1000 - / j ,/ g 's H

/ .

's, ,/ \ ,,g *

/.  %, f \ .,, , ' ' ' " , / s , *. . . - s ,

500 -

I./ \*

' - -- - - 'd.

250 -

*$ g K

0 , , , . , , , , , , , .

Jan. Feb. Wr. Apr. my Jit't Jul. Aug. Sep. Oct. Nov. Dec.

l l

Figu:e 6.3.5 Density of Black Creek benthic organisms at stadons H, I, and K during 1979.

l 1

! 6-30 5

I I

I

~

l'..,

I 3.50 - .

. -g A -,.- ........ . . . . . . . . ..- -.

3.00 -. I

..'...,t..\.;...

I \

2.50 -

/ .

E

I '.'.',

I '\ '

i \ '

b l \ '.*

1 2.00 -

f g ,. \ ',*-

! .E .

I t / \ *I J

C 1 \s / \ p

/

, 1.50 - s s ,/ \ /s s f 4

~

s___s \ /

/ \ /

\ /

\

\ /

s e

1.00 - V Nr f

1 I-4

. . . . . . . i . . +.

Jan. Feb. Mar. Apr. May Jun. Jbl. Aug. Sep. Oct. Nov. Dec.

i 4

i f Figure 6.3.6 Diversity esdmates (3) of Black Creek benthic organisms at stadons H. I. and i K during 1979.

I i

6-31

.~

1 l

l I

24 -

A /.

- l \

/\*

22 -

,.\ I\/ \.

f t.

/ \ .i \,

20 -

\ I /\ \

l.s ,,./ -

\ .h. 'a Ii t

\

\*

18 -

's%#',.\ \ ./ s .I - \ \

-s a

l5 \ ./  %'I \, *;

\ \,s A j ,

t!16 - /.y g /\  %

st g

- 1 \ / \ i,s

/ ,1 \

g

}14

=

s s ./

\

\ /

/

\ t \\ \

g g

1".

~

N s / \ / \

g

i. \ sg 4 12 -

i \%f \

3

- ~ g' \

g \

E 10 -

%. .I 3 \

z - *a g 38 -

i 6

~

'kI m

S 2 -

L Jdn. FEb. M'ar. A k. Adry Jdn. Jdl. Adg. Sh. Oct. Nln. Dec.

l l

Figure 6.3.7 Total number of Black Creek beathic taxa coDected at stations H. I, ad K l

during 1979. W l

i I

6-32

I 7.0 Aquatic Vegetation 7.1 Introduction During 1975 and again in 1978, the aquatic macrophytes of Robinson Impoundment were investigated (CP&L 1976, 1979). In both studies the entire impoundment ens mapped; and the distribution, do:unance, and diversity of the aquatic apecies were noted. In the 1975 study, the upiat.d communities around the impeundment were lso 19 estigated. Those o munities were not included in the 1978 study, as they were not con-

'sidered to be under *he influence of the impoundment.

During Jme and September 1979, the aquatic macrophytes in Robinson Impuunomert were again investigated in order to maka comparisons with the previous data and to determine the factors affecting their distri-bution in the impoundment. As in 1978, the upland communities surround-ing the impoundment were excluded from investigation, being considered not directly related to the impoundment.

I 7.2 Methods I The shareline of the impoundment was investigated on June 21 and on September 28, 1979. In the previous two studies, the entire impoundment was mapped; however, in 1979 only portions of the shoreline were studied.

These portions consisted of approximately 100 m sample areas along the shoreline located at each end of Transects A, B, C, D, DA, E, F, and C.

Approximately 1,600 m of shoreltne were mapped (Figure 7.3.1).

Field sampling was carried out by boat and by wading. Using scale base maps of the impoundment, beds of aquatic vegetation were delineated and identified. The criteria utilized for mapping these beds varied; in I some cases the beds consisted of fairly dense stands of one or more 2

species covering an area of 0.25 m or greater. In other cases the mapped bede consisted of scattered individuals growing over a larger I area. In general, the beds mapped consisted of areas where growing 7-1 1

I plants readily could be observed as fairly discrete units. Individual plants were not mapped but were included in the list of species observed.

Where field identification was not possible, specimens were collected, returned to the laboratory, and identified by means of various taxonomic keys or by direct comparisons with specimens on file in the herbarium of the Department of Botany, North Carolina State University, Raleigh, North Carolina. Taxonomic keys used in this study included Radford et al. (1968); Fassett (1957); Justice and Bell (1968); and Beal (1977).

Nomenclature follows that of Radford et al. (1968).

7.3 Results and Discussion Thirty-seven species of aquatic macrophytes were mapped in or adjacent to Robinson impoundment in 1979. The distribution of these species is shown in Figures 7.3.2 - 7.3.17. In addition, 17 species of aquatic and mesi macrophytes that occurred as individual plants or were growing above the water level were identified. This brings the total number of species observed in or near the impoundment in 1970 to 54 (Table 7.3.1).

Based on field sampling in 1979, the overall distribution of aquatic macrophytes, as well as the species composition, was not appreciably g different from that of 1976 or 1978. There were some slight differences E in the size, location, or compositf.on of areas of macrophytes, but these differences were attributed to natural variation or changes in sampling methodology.

Vegetation was sparse in tu a uthern portion of the impoundment (south of SR 346) and increased sigt.J .icantly north of the highway causeway.

At all transects south of the causeway, only four or five species were observed growing in the water. At Transect F this value increased to 10, and at Transect G the number of species observed was nine. In addition, the density and percent cover of the macrophytes was signifi-cantly greater at Transects F and G than at those south of the causeway.

7-2

I The primary factors influencing the distribution of the macrophytea in Robinson Impoundment appeared to be the depth of the water and the degree of protection from wave action. Urtar temperature appeared to be of less importance, and the least important factors were water quality and substrate characteristics. In areas where avim ing and boating I activities were concentrated, vegetation was sparse or nonexistent; however, these areas were not considered to be large enough to be a factor in the distribution of vegetation in the impoundment.

The southern portion of Robinson Impoundment is much vider than the northern end, reaching a maximum vidth of approximately 1,100 m (3,500 f t) .

During the spring and sumer, the predominant vind direction is from the southwest. The long fetch across the impoundment results in wave action against the east shore, which has a tendency to reduce the establishment I and growth of macrophytes in the water. Secondary winds in spring an<'

sumer are from the nor, i and northeast so that wave action also hits the vest chore. The vest shoreline of the southern portion of the impoundment is lined with rock riprap for most of the distance from the dam to the mouth of the discharge canal and does not offer suitable habitat for aquatic vegeation.

I The northern portion of the impoundment is much narrower than the southern portian and does not experience the same wave action. In I addition, there is a degree of wind protection afforded by the close proximity of wooded areas near the shoreline. The depth of the impound-ment is also much shallover in the northern portion, offering more suitable habitat for vegetation. The combination of vtve action and depth appears to be the primary factor affecting the distribution of aquatic vegetation in the impoundment.

7.4 Sumary and Discussion I The normal variation in the growth and distribution of aquatic plants is a function of various physical factors (Peltier and Welch 1970), as well as biological factors (Hotchkiss 1941). These factors include incident I 7->

s

incident iight, tainfall, turbidity, temperature, reservoir elevation, bu tcL slope, and soil and nutrient composition, as well as the inter-action with other species, natural succession, and the activities of  !

man, i Sculthorpe (1967) discusses many of these factors, and emphasizes that "where the dissolved nutrient regime is suitable and that oxygen is not deficient for long periods of time in either the water or substrate, colonization by rooted hydrophytes (aquatic plants) may occur down to depths where light intensity becomes the limiting factor." lie fur'.her g states that the distribution of "particualr growth forms, communities, 5 or species within the photic zone of a given water-body appears to be governed primarily by turbt'.lence, the nature of the substrate, and light intensity and quality," and concludes that "in a given body of 7ater, whether a particular marginal area is colonized or not will de,and to a large extent on whether it is protected from, or exposed to, strong turbulence."

A study of the aquatic macrophytes in an environment similar to Robinson impoundment was conducted at the Nuclear Regulatory Commission's Savannah River Plant near Aiken, South Carolina. Investigations of the vegetation of the reactor cooling lakes there indicate that temperatures above 45 ' s (113 F) are lethal for the native vascular flora (Parker et al. 1973), a Many of the species reported in that study are also present in Robinson Impoundment.

In othat studies in habitats and locations less similar to Robinson Impoundment, other investigators have reported damage or death of aquatic vegetation at temperatures above 40 C (104 F), with the optimum of 30-35 C (86-95 F) W11kenson 1963; Anderson 1969). Responses of plants vary with species, and in nome studies temperature is not con- =

sidered to be a factor in the distribution of species in a body of water.

During 1979, temperatures in the Robinson Impoundment discharge canal reached a manuum of 43.0 C (109.4 F) on August 8 and again on August 9.

7-4 l

The mean temperature for these dates was 42.0 C (107.6 F) and 42.2 C (10b.0 F), respectively. Temperatures in other parts of the lake at the time were lower, being in the range of 30-36 C (86-97"7) . These s21ues are well within the range for many of the macrophytes tnat occur in the impoundment.

The lack of major beds of aquatic -mcrophytes in the lower portion of Fobinson Impoundment appears to be re. lated to the lack of protection from on-shore waves on the east shore and the presence of riprap along thc. wer+ si. ore.

'I I

I I

7-5 I

7.5 References I

Anderson, R. R. 1969. Temperature e13 rooted aq e plants. Ches. Sci.

10(3&4): 157-164.

Beal, E. O. 1977. A manual of marsh and aquatic vascular plants of North Carolina with habitat data. Agricultural Exptriment Station Tech. Bul. No. 247. North Carolina State University, Raleigh, l North Carolip:. 298 pp. E Carolina Power & Light Company, 1976. H. B. Robinson Steam Electric Plant. 316 Demonstration. Volume II.

. 1979. H. B. Robinson Steam Eeletric Plant Environmental Lonitoring Program Results. Volume II.

Fassett, Norman C. 1957. A manual of aquatic planti. The University of Wisconsin Press, Madison, Wisconsin. 405 pp.

Hotchkiss, Neil. 1941. Limnological role of aquatic plants. In:

Symposium on hydrobiology. The University of Wisconsin Press, Madison, Wisconcin.

Justice, William S. and C. Ritchie Bell. 1968. Wildflowers of North Carolina. The University of North Carolina Press, Chapel Hill, Forth Carolina. 217 pp.

Parker, E. D., M. F. Hirshfield, and J. W. Gibbons. 1973. Ecciogical comparison of thermally affected aquatic environments. J. Water Pollut. Control Fed. 45 (4): 726-733.

M Peltier, W. H. and E. B. Welch. 1970. Factors affecting growth of l rooted aquatic plants in a reservoir. Weed Sci. 18: 7-9.

Radford, A. E., Harry Ahles, and C. Ritchie Bell. 1968. Manual of the vascular flora of the Carolinas. The University of North Carolina Press, Chapel Hill, North Carolina. 1183 pp.

Sculthorpe, C. Duncan. 1967. The Biology of aquatic vascular plants.

Edward Arnold (Publishers) Ltd. , London 610 pp.

Wilkenson, R. E. 1963. Effects of light intensity and temperature on tho growth of waterstargrasr., coontail, and duckweed. Weeds.

11: 287-290.

l 7-6

1 I Table 7.3.1 Macrophytes observed at Robinson Impoundment, 1979 Familv/ Species Osmundaceae Osmunda cinnamomea Osmunda regalis var. spectabilis Pinaceae I Pinus ellettii Pinus caus:.

Taxodiaceae I Taxodium diatichum Typhaceae Typha latifolia Hydrecharitaceae Vallisneria americaaa Poaceae Andropogon temarius Arundinaria gigantea Eragrotis refracta Erianthus contortus Leersia oryzoides Panicum anceps Panicum hemitomon Panicum verrucosum I Panicum virgatum Sacciolepis striata Stenotaphrum secundatum Cyperaceae Cyperus odoratus Cyperus ovularis Cyperus polystachycs var texensis Eleocharis baldwinii Eleocharis equisetoides I

Eleocharis melanocarpa Eleocharis quadrangulata Fimbristylis autumnalis Rhynchospora inexpansa Scirpus cyperinus Araceae Peltandra virginica I Eriocaulaceae Eriocaulon compressum Juncaceae Juncus debilic

_I Juncus effusus Juncus polycephalus

, Juncus repens Juncus scirpoides 7-7 I

Table 7.3.1 (continued)

Liliaceae Smilax laurifolia Haemodoraceae Lachnanthes caroliniana Salicaceae Salix nigra 3 Myricaceae g Myrica cerifera Betulaceae Alnus serrulata Nymphaeaceae Nuphar luteum Nymphaea odorata Cabombaceae Brasenia schreber1 Magnoliaceae E Liriodendron tulipifera g Lauraceae Persea borbonia Cyrillaceae Cyrilla racemiflora Aceraceae Acer rubrum Hypericaceae Hypericum stans Melastomataceae Rhexia tuariana Haloragaceae Myriophyllum heterophyllum 3 Clethraceae g Clethra alnifolia Ericaceae Lyonia ligustrina Lentibulariaceae Utricularia inflata Rubiaceae B Cephalanthus occidentalis 3 7-8 I

I I

I .

T,ansact G I /

Tr.n a ,

1, - m.

I e , _ ,. .

Nw I

I /

/  :~~'

I ":

I s 1,._, c

/

+ y g ~

,, (

a

d. ,

-,g R a_ _.

I 7 T4nsec A h

g 9 4 -

2 agyg hf '

g I ,

Figure 7.3.1 1979 Robinson Impoundnient aquatic vegetation sampling locations.

7-9

I I

coNomwneeAT LAWNGHH64 MAMP rien N

100' BARE SAND BEACH SWlMM4NG AMEA W I

IMPOUNDMENT ,o , ga m m beatsoc ma

\

g] / s'

, .6.* . l.

r I SM

~ -.

s

( ,- Tv ehe l_Wolle g L

l l

4 SAND BEACH I

RIP RAP I

ALONG DAM i~

Figu m 1.3.2 1979 Robinson Impoundment vegetational distributions (transect A east). s, 7 -10

[~

L P

N 100' DISCHAMGE g  ;

g CANAL i 4-- heaua =_amt I - - - - -

gh 4-~ Pah hannaamaan i q; >

r*

IMPOUNDMENT ON SHOMEs -

Aser mense

"* m --*

e.wm bbsnes wwa'**

^*

l C RIP RAP I

I Figure 7.3.3 1979 Robirson Impoundment vegetational distributions (transect A - west).

7-11 i

______________________________-______________________----_________--___-________-.__________________________________--___J

l 3 I

A I N

H.

14/

I

,s

. g ON SHORE:

h emees f Sann aman N&

! }.-omosa,a

\ l

% \, I

_ _ = _

C,s_ l s g

-- \

I nom

. - - 1 y  %

'*" ~

?

l mm M *mmem m

y y - ----

I

% mme muert

, _ _ _ / \ \ __

g Figure 7.3,4 1979 Robinson Irnpou.,dment vegetational distributions (transect B- east ).

I a

7-12

~

\

I I 100' I

I I

1 B

1 b

I ON SHORE:

Acer bM rubrum '

DANGER SIGN ---> ,

Alzma h F' -

CHOA1.

~

i '

1I E .-

l .: .e $ =

$'J.' e s

• Juncus repens N MLo*o"  ? * * . 'c IMPOUNDMENT l': ** '~ d 1 Myrtephyttom heterophynum

\.' *,

' .',2 i t

. . .N .

e.

Figure 7.3.5 1979 Robinson Impoundment vegetational distributions (transect B - west),

7-13 _ _ _ _ ___ _____ _____-__________________ - ____ ____

- - - - ~ - ______ _ _ _ _

1 E

I A '

3 o ,.

I

-- 3 I

e -

9

,A IMPOUNDNENT

• ' ~ a I 2

-- y6 ,

B

• vN mix-.;s~,co , J bh S q l I k nsusro m m Sella ng i

I I

8 Figure 7.3.6 1979 Robinson Impoundnent vegetational GMbudom 4mt G q E

7'14

~ ~ ~ ~ - - - - - _ _ ___ ___ - - - _ __

r H

~

l I

I I

i A . _ . _

.V I '

~

facima hestemen P!PEL NE N s RtPRAP l

Figure 7.3.7 1979 Robinson Impoundment vegetational distributions (transect C - west).

7-15

I I'

I N l' W

1W E

r IMPeWeOMENT I

PIER

-- me d e

~ON ~ SHORE: I

-CEMENT WALL SWIMMING AMA E E

ROAD fSOAT LAUNCH AREA) hN O

(

y Jineenhee w =_-

~

PIER O _

"M 0

94 Amnw esa I

I BOAT HOUSE l'

i E

Figure 7.3,8 1979 Robinson Impoundment vegetational distributions (transect D - east).

7-16 I

A - e a e B

.I I

l1 2 \

' ]

E a

1

\y sz P.- - - e

.g i ou .

j 6 i W l ,

Y , 0

. -- ) )  : O e o x ,,.u. ~

j Sha m m esmae

~

f RIP RAP

' n= mem

!' /

9 I

I j Figure 7.3.9 1979 Robinson Impoundment vegetational distributions (transect D - west).

7-17

I I

I E

}N ,

g 100' I,

, BOAT HeusE

-- ON SHOME:

3^ _ . - -

hoes nuent d M tutdass Aser mwwn M oinnamamsa NN Bom meds

, SWIMMING AREA

~~~-

IMPOUNDMENT d

• 5 PIER l

I l

l l g

Figure 7.3.10 1979 Robinson Impoundment vegetational distributions (transect DA - east).

7-18 a.

N F -

l 100' l h hwwtomen Juncus repens

_- e c Q IMPOUNDMENT ntP RAP ~

I

• ON SHORE:

E1!1El M -

I g -

B 5

Figure 7.3.11 1979 Robinsoa impoundment vegetational distributions (transect DA - west).

7-19

I I

I I

A '

N 3 l

100' PIER I

wrbohyllum e5 I s.--

% , s 3 wrio.syitum 8.tvrophvitum e

IMPOUNDMENT

.)

I I

8 h

Figure 7.3.12 1979 Robinson Impoundment vegetational distributions (transect E . east).

I 7-20 l

l L

L I A N

l 100' I

IMPOUNOMENT K >

I J

. J0 N3 mpapes odoram i ,

^7-SMALL !TTR EAM - \ Myriophyllum heterophytium I

_- E #

( /

v ' @ Juncus reperm B -

ON SHORE:

wm e n s tands Ama e Figure 7.3.13 1979 Robinson Impoundment vegetational distributions (transect E - west).

7-21

~

l'

, I C :_rcSM W ON SHOME:

2 -

~ ~ , , _

AlnusJee5!!att phcrasnegas ( ', Mh hh

- ~

n ~

comos*esum  ; i IfP***n MWW w l M Myricohytium heterophY L4um aams.mw \L Q' 1 -e mnas e l T b Nuphar tutou Eleocharis t28tL_0s

\

\

,1%

.N; l

4 lD

- Nymphase

• _-- I l c Carl' rana hemtLamon

,A SW ISLAND -

Jun.us e _  % '

Y uvwvuumj g

-wawm g I

\ /o#

100' I

I l

\

/

/e E l

i l

l l

Figure 7.3.14 1979 Robinson Impoundment vegetational distributions (transect F - east). 5

! 7-22

l l

fl kN I

100' I -

B - - - - - -

(

IMPOUNDMENT ON SHOR E:

he g --

Myrice coollere A

,1 Myriophyllum heterophyllum I -

Utricularia M_ ate PtER ,

Erfoeeulori compressum I

4 Nymphaos oderete

' Myriochyllum heterophyllum I

mm

/ N T

A -

Nuphar lyu hemitomori Myrtephyllum heterophyuum I

Nymphaos odorata I ,

el e

I I

Figure 7.3.15 1979 Robinson Impoundment vegetational distributions (tnnsect F - west).

7-23

B A

100' I

( i IMPOUNDME ~~

bcjeg hemitoman Juncus parycephaiue

- Lahnenthe qrggianbuis w,,,

e ~ + 7 l

A Myrtophytlum heisecohyllum  ; ,

DANGER SIG6e .-

Imhaantte ustssohne boeren temitomon l ON SHOR*

5 e

i am me B52105 I

! 5 I

I i

I Figure 7.3.16 1979 Robinson Impoundment vegetational distributions (transect G - east).

I 7-24 I

E

r 1

i .

x ,

\ 1W 1

(

lMPOUNDMENT E _ . _ . ,

j _

seenham wrecei I Myeviium d w ehvtium hanum w mm > ,

~.

m j Nuear luwum

'e , , w' /

• * ^ "

'g : 4 MyrispevWun1 heterochvilum ON SHORE: ,, ,

~b

~ '

>""*"' D"3' Mm eme N Nuners vi,einies mm .

8.

l uda.meenw n

==

Btems pnl* -,

gh' .

S uys.pynum h wrophynum Lyorde Wanemene Qethee enHWie fiv_me w o yd smens w +.u.

Qu m esELnammomes i

Figure 7.3.17 1979 Robinson Impoundment vegetational distributions (trartsect G - west).

7-25

,g_.,4 ,,.wm..mm .--,-..w.e ae a A .diapas. m. dew 4-.a. An .i4-has.._.Je m * - p 3 n .. .-__- ila gM. JaA4. .. ,_4.a44 _sa 4J2JAA.-s-J.s Ja .Lu...-n- . Ass.p-4*F..AJa__

5 I

I F I

I I

I

, .,mmx .

II. B. ROBINSON WATER TEMPERATUkE PROFILE E

DATA 1979 I

I

I

-I I

g I

g i_1 I

H. B. ROBINSON WATER TEMPERATURE PROFILE (*C)

January 4, 1979 Note: All depths in meters l

Transect A 3 2 1 Transect B 3 2 1 L sfc 13.0 12.5 12.6 sfc 13.0 13.7 13.8 1 13.0 12.6 12.6 1 13.2 13.5 13.7

- 2 12.9 12.5 12.5 2 13.0 13.2 13.4 3 12.7 12.5 12.5 3 12.9 13.0 13.2 3 4 12.7 12.5 12.5 4 12.8 12.9 13.0 g 5 12.7 12.5 12.5 5 12.6 12.8 13.0 6 12.7 12.5 -

6 12.6 12.8 13.0 7 12.7 12.5 -

7 12.5 12.8 12.7 I 8 10 9

12.6 12.6 12.6 12.5 12.5 12.5 8

9 10 12.5 12.5 12.5 12.6 12.5 12.5 12.7 12.6 12.6 11 12.6 12.5 -

12 12.5 12.5 -

Transect C 3 2 1 Transect CA 3 2 1 sfc 15.1 15.0 14.3 sfc 16.3 16.4 16.2 1 15.5 14.9 14.3 1 16.0 16.3 15.5 2 15.1 14.5 13.5 2 15.5 15.0 14.9 3 3 15.1 14.3 -

3 14.2 14.5 14.1 4 14.0 13.5 -

4 -

14.0 14.0 5 13.9 13.5 -

5 -

13.8 14.0 6 13.8 13.5 -

6 -

13.8 -

7 13.7 13.5 -

7 -

13.8 -

8 ' 3. 7 13.5 -

9 -

13.5 -

Transect D 3 2 1 Transect DA 3 2 1 sfc 17.0 18.4 17.5 sfc 18 7 18.5 17.2 1 16.9 17.8 17.3 1 18.7 16.5 16.0 2 14.4 15.1 17.0 2 15.4 15.5 15.5 3 -

14.9 14.5 3 14.0 14.9 15.0 4 -

14.3 14.2 4 13.9 14.2 14.8 5 - -

14.0 5 - -

13.6 6 - -

14.0 Transect E 3 2 1 Station F Station G Station H*

sfc 21.3 20.0 21.2 sfc 14.5 sfc 6.0 sfc 12.4 1 21.5 19.6 21.0 1 9.5 1 6.0 1 12.5 2 21.5 17.3 19.2 2 8.5 2 6.0 2 12.5 3 - -

12.1 3 8.2 4 - -

12.0 Station 1* Station K*

sfc 4.3 sfc 11.0 1 4.1 1 11.0 2 4.1 2 11.0 3 4.0 3 11.0 A-2

• January 5, 1979

H. B. ROBINSON WATER TEMPERATURE PROFILE (*C)

February 20, 1979 Note: All depths in meters Transect A 3 2 1 Transect B 3 2 1 sfc 10.4 10.0 9.6 sfc 11.1 11.1 10.5 1 10.4 10.0 9.6 1 11.1 11.1 10.5 g 2 10.4 10.0 9.6 2 11.1 11.1 10.5 g 3 10.4 10.0 9.5 3 10.0 10.5 10.3 4 10.1 9.9 9.5 4 10.0 10.0 10.0 5 9.9 9.5 9.5 5 9.9 9.9 9.6 6 9.6 9.5 - 6 9.6 9.6 9.5 7 -

9.5 - 7 9.5 9.5 9.5 8 -

9.5 - 8 9.5 9.5 9.5 5 9 -

9.5 -

9 9.5 9.5 9.5 E 10 -

9.5 -

10 -

9.5 9.5 11 -

9.5 -

11 - -

9.5 12 - -

9.4 Transect 0 3 2 1 Transect CA 3 2 1 sfc 12.8 12.4 11.3 sfc 14.0 12.5 11.5 1 13.0 12.4 11.1 1 14.0 12.5 11.5 2 12.9 12.0 11.0 2 13.0 11.4 10.6 g 3 11.1 11.0 -

3 10.0 10.0 10.0 g 4 10.0 10.2 - 4 10.0 10.0 10.0 5 9.9 9.9 -

5 9.9 9.8 -

6 9.6 9.9 - 6 -

9.8 -

7 9.8 9.9 - 7 -

9.5 -

8 -

9.6 -

Transect D 3 2 1 Transect DA 3 2 1 sfc 15.5 12.8 11.9 sfc 16.7 16.2 15.6 g 1

2 15.0 12.2 12.8 12.0 11.9 11.7 1

2 16.5 11.5 16.2 11.4 15.6 11.0 5

3 -

10.5 10.6 3 10.5 10.5 10.3 4 - -

10.5 4 8.0 7.0 8.0 5 - -

9.5 6 - -

9.5 Transect E 3 2 1 Station F Station G Station H sfc 20.7 18.6 19.7 sfc 10.0 sfc 3.9 sfc 10.2 1 20.7 18.5 19.9 1 7.0 1 3.9 1 10:1 2 20.0 16.0 17.4 2 5.1 2 3.9 2 10.1 3 - -

8.6 4 - -

8.1 Station I* Station K*

sfc 4.5 sfc 10.0 1 4.5 1 9.9 2 4.0 2 9.5 3 4.0 l A-3

• February 21, 1979

I U. B. ROBINS 9N WATER TEMPERATURE PROFILE ('C)

E March 21, 1979 E Note: All depths in meters Transect A 3 2 1 Transect B 3 2 1 sfc 20.4 20.6 20.6 sfc 21.0 20.9 20.6 1 20.4 20.6 20.6 1 21.0 20.9 20.6 5 2 20.4 20.5 20.4 2 21.0 20.6 20.4 3 20.3 20.5 19.7 3 20.0 19.5 19.0 4 20.3 20.4 19.5 4 18.5 18.7 18.5 19.7 IS.5 19.3 17.7 17.6 18.0 8 5 6 18.0 18.1 -

5 6 17.3 17.3 17.5 7 17.6 17.6 -

7 16.7 16.7 16.8

'I 8 9

10 17.3 17.5 17.3 17.3 10 8

9 16.5 16.5 16.2 16.2 16.6 16.2 16.1 11 -

16.9 -

5 12 -

16.8 -

Transect C 3 2 1 Transect CA 3 2 1 sfc 22.1 21.1 21.0 sfc 23.7 23.0 22.0 1 22.1 21.1 21.0 1 23.7 23.1 21.5

'E 2 22.0 21.1 19.8 2 23.5 22.1 21.0 3 3 21.7 21.1 -

3 20.5 19.6 19.7 4 21.0 21.1 -

4 -

16.4 19.5 5 18.0 20.0 -

5 -

17.5 18.9 17.4 16.0 15.5 5 6 7 15.6 15.5 6

7 15.0 8 15.5 15.5 -

9 -

15.4 -

Transect D 3 2 1 Transect DA 3 2 1 5 sfc 1

25.5 25.5 25.5 25.5 24.4 24.5 sf:

1 25.7 25.7 24.2 24.2 24.0 24.0 3 2 25.5 23.1 22.8 2 24.5 24.2 22.6

.I 3 4

19.0 17.4 18.7 16.6 3

4 19.7 17.1 19.0 15.6 19.7 15.5 5 - -

14.9 5 - -

14.5 6 - -

14.5 Transect E 3 2 1 Station F Station G Station M*

sfc 28.0 27.7 28.0 sfc 24.4 sfc 17.0 sfc 18.0 1 28.0 27.5 28.0 1 23.9 1 16.8 1 18.0 2 28.0 -

27.0 2 19.3 2 15.8 2 18.0 28.0 lI 3 18.2 4 - -

15.1 5 - -

14.0 6 - -

13.5 Station I* Station K*

I sfc 13.1 1

2 13.1 13.0 sfc 17.2 1

2 17.2 17.0

, 3 13.0 A-4

• March 22, 1979

H. B. ROBINSON WATER TDD F.RA"'URE SURVEY ('C)

April 19, 1979 Note: All depths in meters Transect A 3 2 1 Transect B 3 2 1 sfc 22.0 22.0 22.4 sfc 22.0 22.0 22.0 1 21.8 22.0 22.3 1 21.6 21.4 21.5 2 2'. 2 21.1 22.2 2 20.9 20.9 21.6 3 22.0 21.0 21.5 3 20.5 20.6 20.9 5 4 21.0 21.0 21.2 4 20.5 20.6 20.6 3 5 21.0 21.0 -

5 20.5 20.5 20.6 6 21.0 21.0 -

6 20.5 20.5 20.5 7 20.9 21 .0 -

7 20.5 20.5 20.5 8 20.9 21.0 -

8 20.5 20.5 20.5 9 20.9 20.9 -

9 20.5 20.5 20.5 10 20.7 20.7 -

10 -

20.5 20.5 E 11 -

20.6 -

11 - -

20.5 5 12 -

20.6 -

13 -

20.6 -

Transect C 3 2 1 Transect CA 3 2 1 sfc 21.9 21.8 21.4 sfc 21.5 21.9 21.1 1 21.6 20.9 21.0 1 21.0 21.0 21.0 2 21.0 20.5 20.4 2 20.6 20.5 20.5 3 20.6 20.5 -

3 20.5 20.5 20.4 g -

4 20.5 20.4 -

4 20.4 20.5 20.1 3 5 20.5 20.4 -

5 -

20.2 20.1 6 20.4 20.4 -

6 -

20.1 -

7 20.4 20.4 -

7 -

20.1 -

8 20.3 - -

?

Transect D 3 2 1 Transect DA 3 2 1 E ,

E-sfc 22.0 22.1 22.0 sfc 23.1 23.2 23.0 1 21.1 21.5 21.8 1 23.0 21.6 21.6 2 21.0 20.5 20.6 2 21.0 20.7 20.5 3 -

20.5 20.5 3 19.9 19.6 20.1 4 -

20.4 20.5 4 19.8 19.0 19.3 5 -

20.4 20.2 5 - -

19.0 6 - -

20.0 Transect E 3 2 1 Station F Station G Station H -

sfc 23.0 23.5 24.0 sfc 21.0 sfc 19.1 sfc 21.6 1 23.0 23.0 21.6 1 20.9 1 17.2 1 21.6 2 23.0 22.0 19.0 2 18.0 2 16.0 2 21.6 3 -

21.0 18.2 3 16.5 3 15.5 4 - -

18.2 Station I Station K sfc 16.0 sfc 21.2 1 16.1 1 21.2 2 16.0 2 21.2 3 16.0 A-5 5

H. B. ROBINSON WATER TEMPERATURE PROFILE (*C) t- May 15, 1979

! Note: All depths in meters Transect A 3 2 1 Transect B 3 2 1 sfc 24.5 24.5 24.8 sfc 24.2 24.3 24 . 3 1 24.5 24.5 24.6 1 24.2 24.3 24.3 2 24.5 24.5 24.6 2 24.2 24.3 '4.3 3 24.5 24.5 24.5 3 24.2 24.! 24.1 J 4 24.4 24.5 24.3 4 24.1 24.1 24.0

! 5 24.4 24.3 24.3 5 24.1 24.0 23.9 6 24.4 24.3 24.3 6 23.5 23.8 23.6 I 7 8

24.4 24.4 24.3 24.3 7

8 23.5 23.3 23.5 23.4 23.5 23.5 g 9 24.3 23.7 - 9 22.8 22.6 22.5 g 10 23.5 23.3 - 10 22.0 22.4 22.0 11 23.0 22.7 -

11 -

21.8 22.0 12 22.2 - -

12 - -

21.7

, 13 22.0 - -

Transect C 3 2 1 Transect CA 3 2 1 sfc 24.0 23.9 23.9 sfc 23.8 23.7 23.9 1 24.0 23.9 23.7 1 23.8 23.7 23.9 2 24.0 23.9 23.7 2 23.8 23.7 23.5 3 24.0 23.9 -

3 23.6 23.5 23.4 1 4 24.0 23.7 -

4 23.6 23.5 23.0 5 23.9 23.7 -

5 -

23.5 23.0 6 23.9 23.7 - 6 -

22.4 23.0 1 7 23.5 23.7 -

7 -

22.0 -

8 23.0 22.5 -

Transect D 3 2 1 Transect DA 3 2 1 ,

afc 24.3 23.8 23.7 sfc 24.5 23.3 23.6 -

24.3 23.8 23.9 24.5 23.5 23.6 l 1 2

3 24.1 23.8 23.5 23.5 23.2 1

2 3

24.0 23.5 23.5 23.5 23.2 23.0 4 -

23.0 23.l' 4 23.0 23.5 22.3 5 -

22.5 22.2 Transect E 3 2 1 Station F Station G Station H*

P sfc 26.0 26.0 24.5 sfc 22.0 sfc 20.8 sfc 23.4 1 26.0 26.0 24.2 1 22.0 1 20.8 1 23.4 .

2 26.0 24.5 23.0 2 21.4 2 19.9 2 23.4 3 26.0 24.0 21.2 3 20.7 3 19.5 3 23.4 4 - -

21.0 Station 1* Station K*

sfc 18.6 sfc 22.1 1 18.5 1 22.1 2 18.5 2 22.1 3 22.1 A-6

• May 17, 1979

E H. B. ROBINSON WATER TEMPERATURE PROFILE (*C)

June 27, 1979 Note: All depths in meters Transect A 3 2 1 Transect B 3 2 1 sfc 25.0 25.2 26.7 sfc 25.0 25.0 25.0 1 25.0 25.2 26.5 1 25.0 25.0 25.0 3 2 24.9 25.2 26.2 2 24.9 24.9 24.9 g 3 24.9 24.9 26.0 3 24.9 24.7 24.6 4 24.8 24.9 26.0 4 24.7 24.5 24.5 5 24.8 24.9 - 5 24.5 24.5 24.5 6 24.8 24.9 - 6 24.5 24.5 24.5 7 -

24.6 - 7 24.5 24.4 24.3 8 -

24.6 - 8 24.0 24.0 24.3 g-9 -

44.6 -

9 23.7 23.2 23.4 g 10 -

24.3 -

10 -

21.0 23.1 11 -

23.4 -

12 -

23.2 -

13 -

23.0 -

Transect C 3 2 1 Transect CA 3 2 1 sfc 25.0 24.8 24.6 sfc 24.9 24.9 24.8 1 25.0 24.8 24.6 1 24.9 24.7 24.9 g 2 24.9 24.7 24.6 2 24.9 24.7 24.7 g 3 24.8 24.7 -

3 -

24.7 24.5 4 24.6 24.5 - 4 -

24.7 24.4 5 24.5 24.5 -

5 -

24.5 24.3 6 24.5 24.5 - 6 -

24.2 -

7 24.5 24.4 - 7 -

23.7 -

8 24.2 24.4 - g 9 -

24.2 - g 10 -

23.9 -

M 1ransect D 3 2 1 Transect DA 3 2 1 gg sfc 25.4 25.0 25.0 sfc 25.4 25.4 25.2 1 13.4 25.0 25.0 1 25.4 25.4 25.2 g 2 25.1 24.8 24.8 2 25.4 25.1 24.6 5 3 -

24.5 24.5 3 25.0 24.7 24.3 4 -

24.2 24.3 4 24.5 24.5 24.0 B 5 -

24.0 24.0 5 - -

23.5 g 6 - -

24.0 Transect E 3 2 1 Station F Station G sfc 27.0 26.9 26.0 sfc 25.2 sfc 23.1 1 27.0 26.9 26.0 1 24.4 1 22.u g 2 27.0 26.5 24.9 2 23.5 2 21.5 g 3 - -

24.0 3 23.2 Station H* Station I* Station K*

sfc 24.5 sfc 19.0 sfc 23.5 1 24.5 1 18.8 1 23.5 g 2 24.5 2 18.7 2 23.5 3 3 18.5 3 23.5

• June 28, 1979 .1- 7 5

H. B. ROBINSON WATrR TDiPCRATURE PROFILE ('C)

I Note

.7uly 22, 1979 All depths in meters Transect A 3 2 1 Transect B 1 2 1 sfc 29.5 29.6 29.5 sfc 29.5 29.5 29.6 1 29.5 29.3 28.5 1 29.7 29.5 29.5 5 2 28.5 28.7 28.4 2 29.5 29.5 28.6 3 28.5 28.5 23.4 3 28.5 28.5 28.4 4 28.5 28.5 28.3 4 28.4 28.4 28.4 5 5 6

28.5 29.5 28.5 28.4 5

6 28.4 28.3 28.3 28.3 28.1 28.1 7 28.0 28.3 -

7 28.0 28.0 28.0 8 -

28.0 -

8 -

27.6 27.6 9 -

27.5 -

9 -

26.5 27.0 10 -

26.7 -

10 -

26.3 26.0 Transect C 3  ? 1 Transect CA 3 2 1 sfc 30.5 30.0 29.5 30.6 30.3 30.0 I

sfc 1 30.5 30.0 29.* 1 30.6 30.4 29.9 2 29.3 29.0 -

2 29.3 29.5 29.0 3 29.0 28.5 -

3 -

29.0 28.6 4 '8.7 28.5 - 4 --

28.6 28.5 5 .8.5 28.3 -

5 -

28.0 -

6 28.0 28.0 -

6 -

27.5 -

3 7 27.6 27.4 -

7 -

27.3 -

g 8 -

27.0

, transect D 3 2 1 Transect DA 3 2 1 afe 31.0 31.0 31.5 sfc 32.0 31.5 31.1 1 30.1 30.4 .' n.6 1 30.5 30.5 30.0 2 -

29.5 26 2 29.6 29.5 29.3 I- 3 -

29.3 29.4 3 -

29.1 29.0 4 - -

28.5 4 - - 26.6 5 - -

26.9 5 - -

26.0 6 - - 26.7

,, Transect E 3 2 1 Station F Station G Station H*

• sfc 33.0 32.7 33.0 sfc 29.0 sfc 26.6 afe 27.5 1 33.0 32.0 32.0 1 28.1 1 25.3 1 27.5 33.0 29.1 29.6 26.0 29.5 27.5 I

2 2 2 2 3 - -

26.4 3 25.5 Station I* Station K*

I sfc 23.3 1 23.3 sfc 27.0 1 27.0 I 2 J

23.3 23.2 2 27.0

• July 23, 1979 A-8 I

. _ _ . _ _ _ _ - - - - _ _ . _ _ _ _ . - - _ _ _ _ _ _ - . _ _ _ _ - _ _ _ _ _ . - _ _ _ _ _ . _ _ _ . _ . _ _ _ _ . -_ _ _ _ _ _ _ _ - - - _ - _ - _ _ - ~ ~ - - _ _ _ - - - - - - _ _ - - - - - - _ _ _ _ -

I

! H. B. ROBINSON WATER TEKPERATUR7 PROFILE ('C)

August 10, 1979 ll Note: All depths in meters Transect A 3 2 1 Transect B 3 2 1 sfc 33.2 33.1 33.1 sfc 32.8 33.1 33.3 g 1 33.1 33.1 33.0 1 32.7 33.0 33.2 g 2 33.0 33.0 33.0 2 32.5 32.7 33.0 3 32.7 32.7 32.9 3 32.3 32.5 32.7 4 32.6 32.6 32.7 4 32.1 32.3 32.3 5 32.2 31.9 31.8 5 33.0 31.6 32.0 6 31.3 31.2 31.1 6 30.6 30.8 31.?

7 30.3 30.3 - 7 30.1 30.2 31.1 3 8 30.0 30.0 - 8 29.8 29.6 30.3 3 9 29.8 2).4 -

9 28.7 28.3 29.3 10 29.4 29.1 -

'. 0 -

27.5 28.5 11 -

28.2 - l' -

27.0 -

l 12 -

27.5 -

Transect C 3 2 1 Transect CA 3 2 1 sfc 34.0 34.1 33.8 afe 34.4 35.2 36.0 1 34.0 34.0 33.6 1 34.3 33.9 35.5 g 2 33.1 33.6 33.0 2 33.2 32.9 33.2 g 3 32.8 32.7 -

3 32.8 32.8 32.9 4 32.5 32.2 - 4 -

31.8 32.4 5 31.8 31.6 - 5 - 31.2 31.8 6 30.6 31.0 - 6 - 29.7 -

7 29.4 30.4 - 7 -

29.5 -

8 29.0 29.3 - 8 -

29.3 -

g 9 28.8 29.1 - g Transect D 3 2 1 Tranoect DA 3 2 1 gg afe 37.4 37.4 37.3 sfc 38.3 37.3 36.6 1 37.1 37.2 37.3 1 37.2 36.8 36.5 2 35.0 34.5 34.3 2 35.0 35.4 32.4 36.4 3 3 -

33.4 33.7 3 -

34.2 3 4 -

32.9 32.2 4 -

30.2 30.1 5 - -

30.7 5 -

29.4 -

g 6 - -

30.1 E Transect E 3 2 1 Station F Station G sfc 41.6 40.5 39.8 sfc 35.9 sfc 32.7 1 39.7 39.6 39.5 1 35.7 1 32.2 2 35.7 37.8 38.5 2 32.2 2 28.2 3 3 - -

31.0 3 29.0 g 4 - -

29.8 Stction H Station I Station K sfc 32.6 sfc 25.2 afe 30.8 1 32.5 1 24.9 1 30.8 g 2 24.7 3 A-9 R

I

~

E 11. B. ROBINSON k'ATER TDiPERATURE PROFILE ( C)

Sept e.mber 26, 1979 I Note All depths in meters Transect A 3 2 1 Transect B 3 2 1 sfe 24.4 24.2 24.2 sic 24.4 24.6 24.8 1 24.3 24.2 24.1 1 24.4 24.6 24.8 2 24.3 24.2 24.1 2 24.4 24.6 24.8 3 24.3 24.2 24.1 3 24.4 24.6 24.8 I 4 24.3 24.2 24.1 4 24.4 24.5 24.8 1 5 24.3 24.2 -

5 24.4 24.5 24.5 6 24.3 24.2 -

6 24.3 24.5 24.5 I 7 24.3 24.2 - 7 24.3 24.3 24.4 8 24.3 24.2 - 8 24.3 24.3 24.3 '

9 26.3 24.2 -

9 24.2 24.3 24.3 10 - 24.2 - 10 24.2 24.3 -

11 - 24.2 -

Transect C 3 2 1 Transect CA 3 2 1 sfc 25.5 25.0 24.7 sfc 26.4 25.3 24.8 1 25.6 25.0 24.5 1 26.4 25.2 24.8 I 2 3

4 25.6 25.6 24.8 25.0 25.0 25.0 2

3 4

26.2 26.1 25.2 25.1 24.9 24.8 24.8 24.8 5 24.5 24.8 -

5 -

24.8 -

I. 6 24.5 24.6 - 6 -

24.8 24.8 7 24.5 24.5 -

7 - -

8 -

24.5 -

I Transect D 3 2 1 Transect DA 3 2 1 sfc 27.6 27.8 26.7 29.1 26.3 24.6 I

sfc 1 27.4 27.8 26.8 1 29.1 26.3 24.7 3 2 25.3 26.0 25.2 2 25.7 25.1 24.7 3 -

25.1 25.1 3 24.9 24.5 23.2 4 -

25.1 4 -

23.1 22.9 3 5 - -

25.1 6 - -

25.0 Transect E 3 2 1 Station F Station G sfc 32.8 32.0 30.5 sfc 26.0 ofe 19.1 -

I 1 2

3 33.0 33.0 33.0 32.0 25.3 29.4 25.5 20.9 1

2 3

25.5 19.5 19.3 1

2 19.1 18.8 4 - -

20.8 -

I Station H* Station I* Station K*

sfc 24.0 sfc 18.8 sfc 23.8 1 24.0 1 18.7 1 23.7 2 24.0 2 18.7 2 23.7 3 23.7 5

• September 27, 1979 A-10 g

I F. B. ROBINSON WATER TDiPERATURE PROFil.E ( C)

October 8, 1979 Note: All depths in meters Transect A 3 2 1 Transect B 3 2 1 sfc 23.7 24.0 24.1 sfc 24.5 24.5 24.5 1 23.6 23.8 24.1 1 24.5 24.5 24.5 2 23.5 23.8 24.0 2 24.4 24.5 24.5 g 3 23.5 23.6 23.7 3 23.8 24.5 24.5 g 4 23.5 23.6 23.4 4 23.7 23.7 23.7 5 23.4 23.5 23.4 5 23.6 23.6 23.6 6 23.4 23.5 - 6 23.6 23.5 23.5 g 7 23.4 23.5 - 7 23.6 23.5 23.3 m B 23.4 23.5 - 8 23.5 23.3 23.2 9 - 23.5 - 9 23.5 23.3 23.0 3 10 - 23.5 - 10 23.5 23.2 23.0 g 11 - 23.4 -

12 - 23.4 -

Transect C 3 2 1 Transect CA 3 2 1 sfc 25.3 25.6 25.5 sfc 25.8 26.1 25.9 1 25.2 25.6 25.5 1 25.5 25.8 25.9 2 24.2 24.2 25.4 2 24.2 25.4 25.7 3 24.0 24.0 - 3 24.2 24.0 24.0 4 24.0 24.0 - 4 -

24.0 24.0 E 5 23.9 24.0 - 5 -

24.0 24.0 E 6 23.9 24.0 - 6 -

24.0 -

7 23.9 24.0 - 7 -

23.9 -

g 8 23.8 23.9 - 8 -

23.9 -

g Transect D 3 2 1 Transect DA 3 2 1 sic 26.6 26.6 27.5 afc 29.2 28.4 27.5 5 1 26.5 26.5 27.4 1 26.8 26.8 27.5 2 25.0 25.7 25.1 2 -

25.6 27.5 3 - 24.8 24.8 3 -

25.1 24.5 4 -

24.1 24.5 4 - 23.9 23.3 5 - -

24.0 5 -

23.3 23.3 6 - - 24.0 Transect E 3 2 1 Station F Station G sfc 32.6 30.0 31.0 sfc 26.2 sfc 22.0 1 32.6 30.0 30.9 1 18.0 1 19.0 2 30.5 25.6 28.6 2 18.0 2 16.5 3 -

20.4 21.5 3 18.0 4 - -

21.5 Station H Station I Station K sfc 23.0 sfc 15.0 sfc 22.6 g 1 23.0 1 15.0 1 22.8 g 2 23.0 2 22.8 I

A-11 B_

I

• H. B. ROBINSON WATER TEMPERATURE PROFILE ( C)

November 12, 1979 Note: All depths in tueters Transect A 3 2 1 Transect B 3 2 1 sfc 20.1 19.7 19.5 afe 20.4 20.5 20.3 1 20. .! 20.0 19.5 1 20.4 20.5 20.2 2 20.1 20.0 19.5 2 20.4 20.4 20.2 I 3 20.1 20.0 19.4 3 20.4 20.4 20.1 20.1 4 20.0 20.0 19.4 4 20.3 20.4 5 20.0 20.0 - 5 20.2 20.3 20.1

'3 20.2 20.3 20.1 20.0 6 i

3 6 7

20.1 20.1 20.0

- 7 20.0 20.0 20.0 8 20.0 20.0 - 8 19.8 20.0 20.0 9 20.0 20.0 - 9 19.4 19.5 19.9 5 10 20.0 20.0 - 10 -

19.5 19.3 11 20.0 20.0 -

I 12 20.0 20.0 -

13 19.8 - -

Transect C 3 2 1 Transect CJ 3 2 1 I sfc 21.8 21.8 20.8 sfc 21.5 21.2 21.0 1 21.8 21.8 20.8 1 21.5 21.2 21.0 I 2 3

4 21.7 21.7 21.7 21.8 21.8 21 . 8 20.8

- 4 2

3 21.5 21.5 21.2 21.2

2. 1 20.9 20.9 20.9 5 21.6 21.8 5 -

21.1 20.9 I

6 20.5 21.4 - 6 -

21.0 20.4 7 20.0 20.0 - 7 -

21.0 20.0 8 20.0 19.9 -

Transect D 3 2 1 Transect DA 3 2 1 sfc 23.5 22.3 23.8 22.8 20.3 I 23.8 sfc 1 23.8 23.5 22.0 1 23.8 22.8 20.3 2 23.5 22.6 21.9 2 20.9 20.9 20.3 3 - 20.4 21.7 3 19.2 19.4 19.3 4 -

19.8 19.5 4 18.5 18.5 18.0 5 5 -

19.5 19.0 6 -

18.4 -

Transect E 3 2 1 Station F Station G Station H sfc 29.5 28.4 27.0 sfc 18.0 sfc 13.9 afe 19.6 I 1 2

3 29.5 29.5 27.5 20.7 20.1 23.5 20.7 19.5 1

2 3

17.9 17.0 16.6 1

2 13.9 13.9 1

2 19.6 19.6 4 - -

18.2 Station 1 Station K j sfc 14.3 sfc 18.0 18.0 1 14.3 1 2 14.2 2 18.0 3 14.2 3 18.0 A-12

'M

!!. B. ROBINS 0tl VATER TEMPERATURE P#0 FILE ( C)

December 3, 1979 Note: All depths in meters Transect A 3 2 1 Transect B 3 2 1 sfc 15.3 15.3 15.2 sfc 15.4 15.5 15.1 1 15.3 15.3 15.2 1 15.4 15.4 15.0 2 15.2 15.3 15.2 2 15.4 15.3 15.0 g 3 15.2 15.3 15.1 3 15.4 15.2 14.9 3 4 15.1 15.3 15.1 4 15.3 15.2 14.9 5 15.1 15.3 15.0 5 15.3 15.2 14.9 6 15.0 15.3 - 6 15.3 15.1 14.8

. 7 15.0 15.2 - 7 15.2 15.1 14.7 8 15.0 15.2 - 8 15.2 15.1 14.5 9 -

15.2 - 9 15.2 15.1 14.5 E 10 - 15.2 - 10 15.2 15.0 14.5 W 11 -

15.1 - 11 -

14.9 -

12 - 15.1 -

Transect C 3 2 1 Transect CA 3 2 1 sfc 16.8 16.5 15.8 sfc 17.9 17.6 16.9 1 16.4 16.0 15.7 1 17.4 17.3 16.1 2 16.1 15.8 15.5 2 16.5 16.5 15.8 3 15.9 15.7 - 3 16.4 16.0 15.6 3 4 15.5 15.5 - 4 -

16.0 15.6 3 5 15.4 15.4 -

5 -

15.8 15.6 6 15.2 15.4 - 6 -

15.6 -

7 15.3 15.4 - 7 -

15.6 -

8 15.1 15 s 's - 8 -

15.5 -

9 15.1 15.4 -

Transect D 3 2 1 . Transect DA 3 2 1 aft 19.6 19.2 19.5 sfc 20.7 19.8 17.0 g 1 18.0 18.4 19.0 1 17.5 18.3 16.7 g 2 17.8 17.0 17.0 2 17.0 16.5 15.9 3 -

16.8 16.7 3 -

16.1 15.1 4 -

16.0 16.7 4 -

15.0 14.0 5 - - 16.6 6 - -

16.7 Transect E 3 2 1 Station F Station G Station H sfc 22.0 21.0 22.5 sfc 14.5 sfc 6.8 sfc 15.0 1 17.0 18.2 21.0 1 13.5 1 5.2 1 15.0 2 16.0 16.5 16.8 2 7.0 2 6.0 2 15.0 3 - -

12.0 3 7.0 4 - -

12.0 Station I afe 5.5 1 5.5 2 5.0 I

A-13 g

I I

I I

I I

I 1

APPENDIX B I H. B. ROD 111 SON DISOLVED OXYGEN PROFILE DATA 1979 I

E I

I I

I I B-1 I

_ A

+

l

11. B. ROBINSON DISSOLVED OXYGEN PROFILE (ppn)

I January 4, 1979 L Note: All depths in meters E Depth A-2 B-2 C-3 CA-2 D-1 DA-2 E-1 F G l 10.3 9.9 10.0 9.6 11.2 sfc 10.6 10.2 10.0 9.7 1 10.6 10.1 9.9 9.7 9.9 9.7 9.9 9.7 11.1 10.4 10.0 9.8 9.6 9.8 9.4 9.9 9.7 11.0 ,i 1 2 3 10.3 10.0 9.8 9.6 9.5 9.3 9.6 9.6 -

4 10.2 10.0 9.7 9.6 9.3 9.3 9.6 - -

5 10.2 10.0 9.7 9.5 9.4 - - - -

1 6 10.2 9.9 9.7 9.5 9.3 - - - -

7 10.2 9.9 9.7 9.5 - - - - -

8 10.1 9.9 9.7 - - - - - -

l 9 10 10.1 10.1 9.0 9.8

[ "

11 10.1 - - - - - - - -

12 10.1 - - - - - - - -

1 I

I I =

M B-2

I H. B. ROBINSON DISSOLVED OXYCEN PROFILE (ppm)

February 20, 1979 Note: All depths in meters I

Depth A-2 B-2 C-3 CA-2 D-1 DA-2 E-3 F C afe 11.8 11.3 11.0 11.0 11.2 10.8 10.7 12.0 11.9 1 11.7 11.2 10.9 10.8 11.1 10.8 10.7 12.0 13.0 2 11.7 11.2 11.0 10.8 11.0 11.0 10.5 12.4 13.0 11.2 10.9 10.8 10.8 10.9 11.5 11.6 g 3

4 11.3 11.2 10.8 10.7 10.8 11.2 11.4 - -

E 5 11.2 11.1 10.8 10.7 10.8 - - - -

6 11.1 11.0 10.8 10.6 10.8 - - - -

7 11.0 11.0 11.0 10.6 - - - - -

8 11.0 11.0 - - - - - - -

9 11.0 11.5 - - - - - - -

10 11.0 10.8 - - - - - - -

11 11.0 - - - - - - - -

I I

I I

I I

I I

B-3 I

I

~

w

- H. 5. ROBINSON DISSOLVED OXYGEN PROFILE (ppm)

March 21, 1979 Note: All depths in meters Depth A-2 B-2 C-3 CA-2 D-1 DA-2 E-1 F G, afe 9.1 9.8 10.3 10.0 9.8 9.9 9.3 10.2 10.1 1 9.1 9.9 10.3 10.2 9.8 10.1 9.4 10.3 10.2 2 9.1 10.1 10.4 10.3 9.9 10.1 9.8 10.6 10.4 3 9.1 10.1 10.4 10.2 9 .9 10.7 10.5 - -

4 9.1 9.9 10.4 10.2 10.3 11.2 10.7 - -

8.9 9.9 10.8 I $ 10.4 10.2 10.7 - - -

6 8.4 9.5 10.2 10.8 10.8 -

10.7 - -

7 8.2 9.5 10.2 10.9 - - - - -

8 8.1 9.4 10.2 - - - - - -

9 8.1 9.6 - - - - - - -

10 8.0 9.6 - - - - - - -

11 7.8 - - - - - - - -

12 7.5 - - - - - - - -

I I

I I

B-4

l I

H. B. ROBINSON DISSOLVED OXYGEN PROFILE (ppn)

April 19, 1979 Note: All depths in meters I

Depth A-2 B-2 C-3 CA-2 D-1 DA-1 E-1 F G sfc 9.1 9.1 9.2 9.1 9.4 9.5 9.5 8.9 9.0 1 9.1 9.1 9.2 9.1 9.4 9.5 9.5 8.8 9.0 g 2 9.0 9.0 9.2 9.1 9.1 9.3 9.3 8.6 8.8 5 3 8.9 9.0 9.1 9.1 8.8 8.9 8.2 8.5 0.8 4 8.9 8.9 9.1 9.0 8.5 7.8 8.3 - -

5 8.8 9.0 8.8 9.0 8.5 7.7 - - -

6 8.8 8.9 8.6 8.8 6.8 - - - -

7 8.8 8.9 8.4 8.7 - - - - -

8 8.8 8.9 8.3 - - - - - -

9 8.7 8.9 - - - - - - -

10 8.6 8.8 - - - - - - -

11 8.5 - - - - - - - -

12 8.4 - - - - - - - -

13 8.2 - - - - - - - -

I 5

I I

I

\

I I

I B-5 I.

m____._..______________ _ _ _ _ _ _ _ _ _ _ . _ _ _ . _ _ _ _ _ ___

I H. B. ROBTNSON DISSOLVED OXYGEN PROFILE (ppm)

May 15, 1979 Note: All depths in meters Depth A-2 B-2 C-3 CA-2 D-1 DA-1 E-1 F G sfc 8.0 8.5 8.4 8.1 7.9 7.6 7.8 7.4 7.2 I 1 2

7.7 7.8 8.6 8.6 8.4 8.3 8.1 8.1 7.8 7.8 7.4 7.3 7.7 7.4 7.2 7.2 7.2 7.0 3 7.7 B.5 8.3 8.0 7.7 7.0 7.0 6.9 7.0 4 7.7 8.4 8.3 8.0 7.1 6.6 6.1 - -

5 7.7 8.3 8.2 8.0 5.0 - - -

6 7.7 8.0 8, 2 5.2 - - - - -

7 7.7 7.9 8.0 ,.5 - - - - -

8 7.7 7.8 6.6 - - - - - -

9 7.5 7.7 - - - - - - -

6.7 5.8 I 10 - - - - - - -

11 5.3 4.4 - - - - - - -

I I

I I

I I

I I

B-6

I i

H. B. ROBINSON DISS01,VED OXYGEN PROFILE (ppm) l June 27, 1979 j Noter All Depths in meters I

1 Depth A-2 B-2 C-3 CA-2 D -1 DA-2 E-1 F G 1

l sfc 7.7 8.0 8.2 7.8 7.7 7.6 3.3 7.7 7.6 j 1 7.7 7.9 8.2 7.8 7.6 7.9 8.3 7.5 7.4 2 7.7 7.9 8.1 7.2 7.4 7.6 7.4 7.3 7.1 1

3 7.9 7.9 8.1 7.2 7.4 7.6 6.3 6.3 -

l 4 7.8 7.7 8.0 7.2 7.2 5.8 - - -

i 5 7.8 7.6 7.9 7.2 5.8 - - - -

6 7.6 7.5 7.8 5.1 5.5 - - - -

7 7.7 7.2 7.8 3.5 - - - - -

8 7.6 6.4 6.3 - - - - - -

9 6.8 3.3 - - - - - - -

10 6.1 1.8 - - - - - - -

3.8 - - - - -

11 - -

i I

j 12 3.1 - - - - - - - -

i l l' l

13 2.8 - - - - - - - -

I I.

$ I e-7 g I_

..~-_,._r ..,._,..,..,.,n.

-,,..,-,-.....-,-w. ,-.nU

L y H. B. ROB'NSON DISSOLVED OXYGEN CONCENTRATIONS (ppm) l July 22, 1979

• All depths in meters Depth A-2 B-2 C-3 CA-2 D-1 DA-2 E-1 F G sfc 8.3 8.4 8.4 8.4 7.9 7.6 7.2 7.9 6.5 1 8.3 8.4 8.4 8.4 7.6 7.5 7.3 7.7 6.0

~

2 7.9 8.3 7.9 7.7 7.5 7.2 7.8 6.5 5.4 3 7.6 8.1 7.2 7.3 7.1 6.8 5.3 5.5 -

4 7.4 7.6 7.2 6.4 6.0 - - - -

5 7.5 7.5 6.3 5.1 3.9 - - - -

1 6 6.6 6.8 5.1 3.5 4.0 - - - -

7 5.9 6.1 4.1 3.4 - - - - -

8 5.5 4.4 - - . - - - -

9 4.2 1.0 - - - - - - -

10 1.6 0.5 - - - - - - -

1 I

I I

I l

B-8

I

11. B. ROBINSON DISSOLVED OXYGEN PROFILE (ppm)

August 10, 1979 Depth A-2 B-2 C-3 CA-2 D-1 DA-2 E-1 F G sfc 7.0 7.3 7.1 6.1 5.8 S.9 5.3 5.9 6.5 1 6.7 7.3 7.0 6.0 5.8 5.9 5.3 5.9 6.4 2 6.2 7.2 6.9 6.v 6.4 6.0 5.5 5.1 5.2 3 6.2 7.1 6.6 5.9 6.1 5.8 4.4 4.4 -

4 5.5 6.5 6.0 5.1 5.4 3.6 3.6 - -

5 4.5 5.1 4.9 4.0 3.4 1.3 - - -

6 3.8 3.8 3.3 2.0 2.5 - - - -

7 2.9 2. 9 1.4 1.9 - - - - -

8 1.9 1.3 0.7 1.7 - - - - -

9 1.2 0.7 0.5 - - - - - -

10 0.8 0.6 - - - - - - -

11 0.6 0.5 - - - - - - -

12 0.5 - - - - - - - -

I I

I I

I I

I I

I B-9 I

I H. B. ROBINSON DISSOLVED OXYCEN PROFILC (ppm)

September 26, 1979 Note: All depths in meters Depth A-2 B-2 C-3 CA-2 D-1 DA-2 E-1 _F G sfc 7.0 6.8 6.6 5.8 6.7 6.9 7.4 7.5 6.2 1 6.1 6.7 6.4 6.0 7.1 7.0 6.7 7.5 6.3 2 6.2 6.7 6.2 6.2 6.3 6.4 6.5 6.6 6.1 3 6.2 6.1 5.5  !.8 6.2 5.5 6.4 6.5 -

4 6.2 5.9 5.5 5.0 5.9 5.4 6.3 - -

5 6.1 6.0 5.3 5.0 6.0 - - - -

6.2 5.9 5.4 5.2 6.1 I

6 - - - -

7 6.2 5.9 5.2 5.8 - - - - -

8 6.2 5.6 - - - - - - -

9 6.0 6.0 - - - - - - -

10 6.1 6.1 - - - - - - -

11 6.0 - - - - - - - -

I I

I I

I I

I I

I B-10

I I H. B. ROBINSON DISSOLVED OXYGEN PROFILE (ppm)

October 8, 1979 Note: All depths in meters Depth A-2 B-2 C-2 CA-2 D-1 DA-2 E1 F G sfc 8.0 8.4 8.5 8.5 8.3 8.4 8.3 8.4 7.8 1 8.0 8.4 8.5 8.5 8.3 8.5 8.4 6.7 6.8 2 7.7 8.3 7.5 8.4 7.5 8.2 8.4 6.6 6.6 3 7.3 8.3 7.1 6.6 6.6 6.9 5.6 6.7 -

4 7.2 7.7 7.1 6.8 6.8 5.3 6.1 - -

5 7.2 7.7 7.0 6.6 4.8 5.7 - - -

6 7.1 7.4 7.0 6.7 4.8 - - - -

7 7.1 7.4 6.9 6.6 - - - - -

8 7.1 7.2 6.8 6.7 - - - - -

9 7.1 7.2 - - - - - - -

10 7.1 7.2 - - - - - - -

11 7.0 - - - - - - - -

12 7.0 - - - - - - - -

I I

E I

I I

I I

B-11 I

I

_ _ _M

I H. B. ROBINSON LISSOLVED OXYGEN PROFILE (ppm)

November 12, 1979 Note: All depths in meters Depth A-2 B-2 C-2 CA-2 D-1 DA-2 E-1 F G sfc 7.6 7.2 7.0 6.9 7.] 7.1 6.6 7.2 7.3 l- 1 7.6 7.3 7.0 7.1 6.8 7.1 6.5 7.2 7.3 2 7.4 7.1 6.9 7.0 7.0 6.7 6.6 7.0 7.3 3 7.7 7.1 7.0 7.1 6.1 5.8 6.6 6.8 -

4 7.3 7.1 7.0 6.9 5.3 4.5 5.9 - -

5 7.5 6.9 7.0 7.0 4.9 - - - -

6 7.2 7.0 6.5 7.0 - - - - -

7.4 7.0 5.9 5.3 - - - - -

I 7

8 7.3 6.9 5.5 - - - - - -

9 7.3 6.8 - - - - - - -

10 7.2 7.0 - - - - - - -

11 7.3 - - - - - - - -

12 7.1 - - - - - - - -

I g

I I

I I

I I B-12 I

- -- _ A

I H. B. ROBINSON DISSOLVED OXYGEN PROFILE (ppm)

December 3, 1979 Note: All depths in meters Depth A-2 B-2 C-2 CA-2 D-1 DA-2 E-l_ F G sfc 8.4 8.6 8.3 S.7 8.5 7.7 8.7 9.6 11.2 1 8.2 8.6 8.2 8.6 8.5 7.8 8.8 9./ 10.6 2 8.2 8.5 8.1 8.4 8.2 8.0 8.2 10.6 10.4 3 8.2 8.7 8.1 8.4 8.2 7.9 9.4 10.6 -

4 8.3 8.3 8.0 8.3 7.9 5.6 9.7 - -

5 8.3 8.3 8.0 8.3 7.7 - - - -

6 8.3 8.3 8.0 8.3 7.8 - - - -

7 8.2 8.3 8.0 8.3 - - - - -

8 8.0 8.3 8.1 8.3 - - - - -

9 8.2 8.2 8.2 - - - - - -

10 8.2 8.1 - - - - - - -

11 8.2 7.2 - - - - - - -

12 8.3 -- - - - - - -

I 5

I I

I I

I

,.13 I

a

- - . _ _ _ . _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ - _ _ _ _ _ _ _ -