ML19077A088
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| Site: | Turkey Point  |
| Issue date: | 07/30/2018 |
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Text
fyi- Letter from M-D Count y DERM to FL DEP.
Melody J. Hunt, Ph.D. HydrologistNational Park ServiceSouth Florida Natural Resources Center 950 North Krome AvenueHomestead, FL 33030PH: 305-224-4211Email: melody_hunt@nps.gov
0 0.5 1 1.5 2 2.5 3 3.5 Prepared in cooperation with Miami-Dade CountyMap of the Approximate Inland Extent of Saltwater at the Base of the Biscayne Aquifer in the Model Land Area of Miami-Dade County, Florida, 2016
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!FKS 9 48 FKS 7 98 FKS 6 51 FKS 5 31 FKS 1 57 G-1180 22 G-3167 65 FKS 2 763 G-3976 36 G-3900 31 G-3166 150 G-1603 643 FKS 4 3,150 FKS 3 7,375 G-3342 2,390 G-1264 8,300 FKS 8 10,050 G-3855 7,960 G-3698 2,830 TPGW-9L 25.2 TPGW-8L 46.2 TPGW-7L 2,750 TPGW-6L 7,570 G-3966S 5,610 G-3946D 5,780 G-3699 10,700 TPGW-5L 12,300 TPGW-4L 15,200 TPGW-3L 28,500 TPGW-2L 31,200 TPGW-1L 29,100 SWIM well 130 TPGW-14L 27,800 TPGW-13L 36,800 TPGW-12L 27,100 TPGW-11L 25,300 TPGW-10L 26,400 ACI-MW-15 2,480 ACI-MW-09 30.8 ACI-MW-05 47.4 ACI-MW-04 48.5 ACI-MW-03 17.8 ACI-MW-16 36.9Florida Keys Aqueduct AuthorityLeisure CityFlorida CityWittkop ParkNewtonRedavoHomestead Airforce BaseNaranja ParkHarris ParkEverglades Labor Camp Sec34-MW-02-FS FLORIDAMiami-DadeCountyStudy areaEXPLANATION
!Monitoring well name and chloride concentration, in milligrams per literWell field Approximate inland extent of saltwater in 2011 (Prinos and others, 2014)
Approximation Dashed where data are insufficient Approximate inland extent of saltwater in 2016 Approximation Dashed where data are insufficient G-3698 2,830 Model Land Area l a n a C 0 1 1-CCard Sound Barnes SoundLittle Card Sound Biscayne Bay Cooling canal systemATLANTIC OCEAN024 MILES024 KILOMETERSScientific Investigations Map 3380U.S. Department of the InteriorU.S. Geological Survey Cover. Map showing the approximate extent of saltwater at the base of the Biscayne aquifer in the Model Land Area of Miami-Dade County, Florida, 2016. See https://doi.org/10.3133/sim3380 for map sheet.
Map of the Approximate Inland Extent of Saltwater at the Base of the Biscayne Aquifer in the Model Land Area of Miami-Dade County, Florida, 2016By Scott T. Prinos Prepared in cooperation with Miami-Dade County Scientific Investigations Map 3380 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the InteriorRYAN K. ZINKE, Secretary U.S. Geological SurveyWilliam H. Werkheiser, Acting DirectorU.S. Geological Survey, Reston, Virginia: 2017 For more information on the USGSthe Federal source for science about the Earth, its natural and living resources, natural hazards, and the environmentvisit https://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov
.Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.
Suggested citation:Prinos, S.T., 2017, Map of the approximate inland extent of saltwater at the base of the Biscayne aquifer in the Model
Land Area of Miami-Dade County, Florida
- U.S. Geological Survey Scientific Investigations Map 3380, 8-p. pamphlet, 1 sheet, https://doi.org/10.3133/sim3380
.ISSN 2329-132X (online) iii Acknowledgments The authors would like to acknowledge the organizations that provided data for the study area: EAS Engineering, Inc., Florida Keys Aqueduct Authority, Florida Power & Light Company, Miami-Dade County, and South Florida Water Management District. Without the data provided by these
organizations, the map in this report could not have been created.
v ContentsAcknowledgments .......................................................................................................................................iiiAbstract ..........................................................................................................................................................1 Introduction ....................................................................................................................................................1Mapping the Approximate Inland Extent of the Saltwater Interface ...................................................2 Approximating the Rate of Movement of the Saltwater Interface .......................................................2 Monitoring Network Improvements ..........................................................................................................3References Cited ...........................................................................................................................................4Appendix 1. Estimation of Chloride Concentrations at Wells Where Conductivity Profiles Were Used for Monitoring..................................................................................................5 Sheet[Available from https://doi.org/10.3133/sim3380
]1.Map of the approximate inland extent of saltwater at the base of the Biscayneaquifer in the Model Land Area of Miami-Dade County, Florida, 2016 Conversion Factors SI to Inch/PoundMultiplyByTo obtain Lengthmeter (m)3.281foot (ft) kilometer (km)0.6214mile (mi)
Area square kilometer (km 2)247.1acre square kilometer (km 2)0.3861square mile (mi 2)Volumeliter (L)0.2642gallon (gal) liter (L)61.02cubic inch (in
- 3) Flow ratemeter per year (m/yr)3.281foot per year (ft/yr)
Massgram (g)0.03527ounce, avoirdupois (oz) kilogram (kg)2.205pound, avoirdupois (lb)
Electrical conductivitysiemens per meter (S/m)10,000microsiemens per centimeter vi Electrical conductivity in microsiemens per centimeter [S/cm] can be converted to electrical resistivity in ohm-meters [ohm m] as follows: = 10,000/.Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:
°F = (1.8 x °C) + 32 Datum Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).
Supplemental Information Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25 °C).Concentrations of chemical constituents in water are given in milligrams per liter (mg/L).
Abbreviationsbls below land surface GIS geographic information system TSEMIL time-series electromagnetic-induction log (dataset)
USGS U.S. Geological Survey Map of the Approximate Inland Extent of Saltwater at the Base of the Biscayne Aquifer in the Model Land Area of Miami-Dade County, Florida, 2016 By Scott T. Prinos Abstract The inland extent of saltwater at the base of the Biscayne aquifer in the Model Land Area of Miami-Dade County, Florida, was mapped in 2011. Since that time, the saltwater interface has continued to move inland. The
updated approximation of the inland extent of saltwater and
an improved understanding of the rate of movement of the saltwater interface are necessary. A geographic information
system was used to create a map using the data collected by the organizations that monitor water salinity in this area. An
average rate of saltwater interface movement of 140 meters
per year was estimated by dividing the distance between two monitoring wells (TPGW-7L and Sec34-MW-02-FS) by the travel time. The travel time was determined by estimating
the dates of arrival of the saltwater interface at the wells and computing the difference. This estimate assumes that the
interface is traveling east to west between the two monitoring wells. Although monitoring is spatially limited in this area
and some of the wells are not ideally designed for salinity
monitoring, the monitoring network in this area is improving
in spatial distribution and most of the new wells are well designed for salinity monitoring. The approximation of the
inland extent of the saltwater interface and the estimated rate
of movement of the interface are dependent on existing data.
Improved estimates could be obtained by installing uniformly
designed monitoring wells in systematic transects extending
landward of the advancing saltwater interface.
Introduction Seawater began intruding the Biscayne aquifer of Miami-Dade County early in the 20th century because of a decline in
the fresh groundwater level, estimated to have been 2.9 meters (m)below predrainage conditions near Miami (Prinos and others, 2014). By 2011, approximately 1,200 square kilometers (km
- 2) of the mainland part of the Biscayne aquifer were intruded by saltwater (Prinos and others, 2014). Intrusion
of the Biscayne aquifer by saltwater is a concern because it can render the water unpotable in affected parts of the aquifer.
The maximum concentration of chloride allowed in drinking
Protection Agency, 2014), whereas saltwater-intruded parts of
the aquifer commonly have water with chloride concentrations of 1,000 mg/L or greater.
The inland extent of saltwater at the base of the Biscayne aquifer was last mapped by Prinos and others (2014) in 2011.
Since that time, saltwater has continued to intrude beneath
drained wetland area in southeastern Miami-Dade County that is bordered on the east and south sides by Biscayne Bay, Card Sound, Little Card Sound, and Barnes Sound. A system of
of surface water in this area. There is an extensive system of
cooling canals in the eastern part of this area that has been
hypersaline at times (Hughes and others, 2010).In the Model Land Area, the saltwater interface
approximation of the inland extent of saltwater and an
improved understanding of the rate of movement of the
approximate inland extent of saltwater in the Model Land Area
in 2016 and approximated the average rate of movement of the
saltwater interface in this area based on data collected between 2007 and 2014. This study aligns directly with the strategic
forecasting, and securing freshwater for America's future.
The purpose of this report is to provide a map of the saltwater
interface (2016), an estimate of the rate of interface movement
given the dates of arrival at two wells, and a description of the methodologies used to arrive at these results. The analyses and
estimates are based on available data from existing monitoring wells in the Model Land Area.
2 Map of the Approximate Inland Extent of Saltwater at the Base of the Biscayne Aquifer, Miami-Dade County, Florida, 2016 Mapping the Approximate Inland Extent of the Saltwater Interface The approximate inland extent of saltwater in the Biscayne aquifer was determined by using (1) chloride
collected from monitoring wells, (2) water conductivity
collected in polyvinyl-chloride-cased monitoring wells. This
Florida Keys Aqueduct Authority, the Florida Power & Light Company, the South Florida Water Management District
by the SFWMD for this study area had been collected by the other four organizations, so they are mostly redundant. The
information was entered into a geographic information system (GIS) for analysis and mapping. Data used to make the map
are available as a data release (Prinos, 2017).
Sampling, analysis, and quality assurance procedures of the organizations collecting salinity data in the study area vary.
Procedures used by the Florida Power & Light Company for sampling and quality assurance are described in the Turkey Point Quality Assurance Project Plan (Florida Power & Light Company, 2011). These procedures are likely among the most stringent used by organizations collecting salinity data in the study area. This plan was drafted jointly by the Florida
& Light Company, and the SFWMD and was approved by
Branch of Quality Systems Standard Reference Sample Semi-
and the Florida Power & Light Company use laboratories that
Accreditation Program. Participation in this accreditation
without reviewing the results of the accreditation testing for
each laboratory used.
The approximate saltwater interface is represented by the 1,000-mg/L isochlor at the base of the Biscayne aquifer. The
word "approximate" is used because the spatial distribution
precise representation. The accuracy and precision of this
approximation is best evaluated on a location-by-location basis, based on the available monitoring wells. The locations of the monitoring wells and the chloride concentration values
are shown on the map (sheet 1, available at https://doi.
org/10.3133/sim3380). The line depicting the approximate inland extent of saltwater is dashed where the monitoring well precise approximation. conductivity provide additional qualitative insights for
water that do not correspond to the open interval of the well
and temporal changes in the depth of the top of the saltwater
for monitoring, chloride concentrations were estimated by
using a relation based on a linear regression of the chloride
appendix 1.
The majority of the monitoring wells used for this analysis have short open intervals (about 1.5 meters [m] or
less), but 37 percent have open intervals of 8 to 40 m (Prinos, 2017). The long open-interval wells are not ideal for salinity
monitoring for the reasons summarized in Prinos (2013) and Prinos and Valderrama (2015), but they are the only wells
available at some locations.
Approximating the Rate of Movement of the Saltwater Interface The saltwater interface in the study area is advancing at an estimated average rate of 140 meters per year (m/yr).
This estimate is based on limited data because there are few
wells in this area where the date of arrival of the saltwater
interface can be ascertained. Most wells were installed either
after the saltwater interface had already passed the location or where the saltwater interface has not yet arrived. The
estimate is based on data from monitoring wells Sec34-
Inc., and the Florida Power & Light Company, respectively.
from well Sec34-MW-02-FS are available in Prinos (2017).
Well TPGW-7L is open to the aquifer from 24 to 26 m
below land surface (bls), which is near the depth of the base
of the Biscayne aquifer at this location (Fish and Stewart, 1991). The chloride concentration in water samples from well TPGW-7L increased from 180 to 825 mg/L between December 3, 2013, and March 11, 2014, and from 825 to 1,300 mg/L between March 11, 2014, and June 9, 2014.
2 (appendix 1), conductance values measured at this depth
equate to chloride concentrations of about 190, 530, 930, and
2008, and May 15, 2008, respectively.
Monitoring Network Improvements 3 The average rate of saltwater interface movement was estimated by dividing the distance between the wells (830 m) by the difference between the interpolated dates of arrival of chloride concentrations of 250 and 1,000 mg/L at each well. The interpolated dates of arrival at well Sec34-
for concentrations of 250 and 1,000 mg/L, respectively.
The interpolated dates of arrival at well TPGW-7L were December 13, 2013, and April 13, 2014, for concentrations of 250 and 1,000 mg/L, respectively. Given these dates and the
distance between these wells, the estimated rate of movement
of the front is 137 m/yr based on a chloride concentration of
250 mg/L, and the estimated rate based on a concentration of 1,000 mg/L is 138 m/yr. These estimates can be rounded to an average estimate of 140 m/yr. This rate of movement was used to help interpolate the location of the 1,000-mg/L isochlor in the Model Land Area.
This estimate assumes that the direction of front movement is parallel to a line passing through these two well
locations, and that the rate of front movement is constant.
interface elsewhere in the study area assumes that (1) effective
porosity is uniform throughout this area, (2) direction of
front movement is east to west, and (3) that the rate of front movement is the same throughout this area. Additional
monitoring is needed to evaluate these assumptions (see
Given the stated assumptions, the saltwater interface may
future movement may be conservative because withdrawals
travel.Monitoring Network ImprovementsWithin the map, the line depicting the approximation of the inland extent of the saltwater interface is dashed
near the Card Sound Road Canal and in the area around
an accurate delineation of the interface. These areas were
previously mapped by using helicopter electromagnetic
surveys (Fitterman and Prinos, 2012) and time-domain electromagnetic soundings (Fitterman and others, 2011).
Monitoring in these areas currently consists of only a few
wells that are too far from the expected current location of the
interface to provide relevant information. Monitoring near the
edge of the elongated extension of saltwater that had intruded
along the Card Sound Road Canal (Prinos and others, 2014) is
almost nonexistent.
Given the rate of movement of the saltwater interface estimated in this investigation, the chloride concentrations
of samples from some of the monitoring wells on the freshwater side of the interface may not exceed 1,000 mg/L for
many years. Monitoring well FKS 9, for example, is 0.86 km from the estimated location of the saltwater interface. The 1,000-mg/L isochlor may not arrive at this well until 2023, if the rate of movement of the saltwater interface proceeds at the average rate estimated in this study. Better estimates of
the rates of movement are needed before 2023, particularly
because the rate of movement may not be constant.
Monitoring well FKS 5 is even farther from the approximated location of the saltwater interface than well FKS 9. The rate
and direction of movement of the saltwater interface near well
FKS 5 are unknown. If the rate of movement were the same as that between wells Sec34-MW-02-FS and TPGW-7L, the 1,000-mg/L isochlor may not reach this well for 26 years if
the interface moves northward, or 17 years if the interface moves westward. Water managers would most likely need to
have a better understanding of the location of the saltwater
interface, its rate of movement, and direction of movement
than currently provided near FKS 5.Differences in the design, placement, quality of chemical analyses, and type of monitoring can add uncertainty to this analysis. The analysis of the rate of movement of the saltwater interface between monitoring wells Sec34-MW-02-FS and TPGW-7L, for example, required a number of estimations,
chloride, the relation between pumped water samples and
in situ measurements of conductance, and the conversion of
conversions increase uncertainty. Some monitoring wells, such as well Sec34-MW-02-FS and many of the wells monitored by the Florida Keys Aqueduct Authority, are designed to monitor the depth of the
top of the saltwater interface through the collection of water
Because these wells have long open intervals, the sample
and Valderrama, 2015). Although several organizations base
their sampling on the Standard Operating Procedures of the
(2013) states that these procedures "call for sampling of long
open-interval wells by pumping from near the top of the water
column or top of the open interval, which could result in
samples that are not representative of maximum salinity in the
participates in a quality assurance testing program (see the
Interface section of this report).
be improved by placing monitoring wells along a transect, spaced at distances that would allow timely detection of any
variations in the rate of movement of the saltwater interface, and parallel to the direction of movement of the interface. If
resulting data could be used to evaluate spatial differences in
the rates of movement of the saltwater interface at locations
4 Map of the Approximate Inland Extent of Saltwater at the Base of the Biscayne Aquifer, Miami-Dade County, Florida, 2016 datasets in wells in each transect could provide information on
monitoring methods at wells in each transect could reduce the
uncertainty in the estimated rate of movement.
References Cited Geological Survey Water-Resources Investigations Report 90-4108, 50 p., 11 sheets.Fitterman, D.V., Deszcz-Pan, Maria, and Prinos, S.T., 2012, Helicopter electromagnetic survey of the Model Land
Geological Survey Open-File Report 2012-1176, 77 p.,
39 pls., accessed January 5, 2017, at https://pubs.usgs.gov/of/2012/1176/
.Fitterman, D.V., and Prinos, S.T., 2011, Results of time-domain electromagnetic soundings in Miami-Dade and
Survey Open File Report 2011-1299, 289 p., accessed
January 5, 2017, at https://pubs.usgs.gov/of/2011/1299/
.
2008, Groundwater sampling: Florida Department of
February 10, 2017, at sop/sops.htm
.Florida Power & Light Company, 2011, Quality Assurance Project Plan-Turkey Point Monitoring Project: Florida Power & Light Company, 170 p., 9 app., accessed
February 22, 2017, at https://www.sfwmd.gov/documents-
.
salinization: Hydrogeology Journal, v. 18, p. 25-38.system of the Big Cypress Basin, southwest Florida, and a proposed plan for improved salinity monitoring:
58 p., accessed January 5, 2017, at https://pubs.usgs.gov/
of/2013/1088/
.Prinos, S.T., 2017, Data pertaining to mapping the approximate inland extent of saltwater in the Biscayne aquifer, in the Model Land Area of Miami-Dade County,
http://dx.doi.org/10.5066/F7R78CF8. Prinos, S.T., and Valderrama, Robert, 2015, Changes in the saltwater interface corresponding to the installation
of a seepage barrier near Lake Okeechobee, Florida:
24 p., accessed January 5, 2017, at https://pubs.usgs.gov/
of/2014/1256/
.Prinos, S.T., Wacker, M.A., Cunningham, K.J., and Fitterman, D.V., 2014, Origins and delineation of saltwater intrusion
in the Biscayne aquifer and changes in the distribution of
accessed January 5, 2017, at http://dx.doi.org/10.3133/
sir20145025
.drinking water standards: Guidance for nuisance chemicals:
079, accessed January 26, 2011, at http://water.epa.gov/
drink/contaminants/secondarystandards.cfm
.
Survey Techniques of Water-Resources Investigations, book 9, chaps. A1-A9, available online at http://pubs.water.
usgs.gov/twri9A
.
Appendix 1 5Appendix 1. Estimation of Chloride Concentrations at Wells Where Conductivity Profiles Were Used for Monitoring used for monitoring, chloride concentrations were estimated
by using a relation based on a linear regression of the chloride
September 26, 2016, from 178 monitoring sites sampled
The relation is expressed as cc = 0.3458 scwhere cc is the chloride concentration in milligrams per liter, and scper centimeter.
following relation (Carlson, [n.d.]).
sc = c/(1 + r (Twhere c is the actual conductance measured in microsiemens per centimeter, T is the temperature of the sample in degrees Celsius, and rthe sample. conductivity provide additional qualitative insights for
water that do not correspond to the open interval of the well
and temporal changes in the depth of the top of the saltwater
interface.
The majority of the monitoring wells used for this analysis have short open intervals (about 1.5 meters [m] or less), but 37 percent have open intervals of 8 to 40 m (Prinos, 2017). The long open-interval wells are not ideal for salinity
monitoring for the reasons summarized in Prinos (2013) and Prinos and Valderrama (2015), but they are the only wells
available at some locations.
References Cited accessed March 6, 2017, at https://in-situ.com/wp-content/
.system of the Big Cypress Basin, southwest Florida, and a proposed plan for improved salinity monitoring:
58 p., accessed January 5, 2017, at https://pubs.usgs.gov/
of/2013/1088/
.Prinos, S.T., 2017, Data pertaining to mapping the approximate inland extent of saltwater in the Biscayne aquifer, in the Model Land Area of Miami-Dade County,
http://dx.doi.org/10.5066/F7R78CF8. Prinos, S.T., and Valderrama, Robert, 2015, Changes in the saltwater interface corresponding to the installation
of a seepage barrier near Lake Okeechobee, Florida:
24 p., accessed January 5, 2017, at https://pubs.usgs.gov/
of/2014/1256/
.System-Web interface, accessed September 28, 2016, at .Appendix 1 6 Map of the Approximate Inland Extent of Saltwater at the Base of the Biscayne Aquifer, Miami-Dade County, Florida, 2016Table 1-1. Listing of U.S. Geological Survey monitoring sites in southern Florida from which water samples were collected to evaluate specific conductance and chloride concentration.
USGS station identifier Site name262313080044401PB -1457262209080044702PB -1669 261100080140401G -1212 261122080083401G -1232 260547080105801G -2352 260920080092201G -2898 260551080111901G -2957 261740080054101G -2893 255916080090401G -1435 255910080085802G -2294 255919080091202G -2409 255919080091203G -2410 255936080091701G -2477 255936080091702G -2478 255916080092001G -2965 260037080100700Hollywood Canal at Hollywood Blvd, Hollywood, FL260104080101300Hollywood Canal at Johnson St, Hollywood, FL 260225080095800FL260212080112500FL260132080094900Hollywood Canal at Taft St, Hollywood, FL260041080093101G -2425 260041080093102G -2426 260120080093401G -2441 260155080092002G -2612 260026080095801G -2956 254943080121501F - 45 254841080164401G - 571 255350080105801G - 894 254107080165201G - 896 254201080173001G - 901 254106080174601G -1009B 252947080235301G -1180 254813080161501G -1351 254833080155801G -1354 255222080123001G -3224 254457080160301G -3229 254946080172601G -3250 252714080260901G-3976 USGS station identifier Site name255453080110801G-3978254601080150301G-3977 254156080172101G -3607 252814080244101G -3698 252652080244301G -3699 252650080252701G -3855 253253080221201G -3885 253527080195401G -3886 253924080174601G -3887A 253924080174602G -3887B 254542080145901G -3888A 254542080145902G -3888B 254542080145903G -3888C 253948080250701G -3897 254152080282601G -3898 253419080223701G -3899 252718080264901G -3900 252506080300601G -3901 252431080261001G -3946D 252431080261002G -3946S 255011080124501G -3947 255515080103601G -3948D 255515080103602G -3948S 255733080195601G -3949D 255733080195602G -3949I 255733080195603G -3949S 254824080155301G -3964 254500080162801G -3965 252719080253601G -3966D 252719080253602G -3966S 253335080213501G -3967 255315080111501F - 279 254828080161501G - 354 254335080170501G - 432 254855080163701G - 548 253652080183701G - 939 253202080232601G -3162 253831080180204G -3313C
253831080180206255358080114101G -3601 255116080120601G -3602 Appendix 1 7Table 1-1. Listing of U.S. Geological Survey monitoring sites in southern Florida from which water samples were collected to evaluate specific conductance and chloride concentration.Continued USGS station identifier Site name254908080125201G -3603254722080152201G -3604 254629080143101G -3605 254341080174001G -3606 254108080170601G -3608 254005080171601G -3609 253819080183201G -3610 253710080184701G -3611 253457080195501G -3612 253024080231001G -3615 253027080234701G -3700 253214080224601G -3701 253334080213601G -3702 254822080125501G -3704 255625080094901G -3705 261302081473901C - 489 261156081475801C - 516 261002081483701C - 525 261018081484101C - 526 261200081483001C - 528 260549081441901C - 600 261802081354801C - 688 261347081351201C - 953 261620081464402C -1004R 261604081480901C -1059 261311081480101C -1061 260137081375901C -1063 262228081361902C -1080 261403080070801G -2149 260342080115902G -2264 261446080062801G -2445 261724080054603G -2693 260242080101101G -2697 261643080055901G -2752 261740080054101G -2893 261304080072501G -2896 261030080083301G -2897 260804080092701G -2899 260325080113901G -2900 260638080104801G -2902 255843080090901G -2903 USGS station identifier Site name260534080110801G -2904262839081503100L - 735 262022081464201L - 738 263532081592202L -1136 263813081552801L -2640 263819081585801L -2701 263955082083102L -2820 263117082051002L -2821 264053081572501L -4820 262513081472002L -5668R 261926081454702L -5745R 264123080053801PB - 809 263044080035102PB -1195 262755080040101PB -1707 262803080041101PB -1714 263453080031501PB -1717 263633080031401PB -1723 265550080070701PB -1732 265611080080201PB -1733 265006081042502GL - 334I 265006081042501GL - 334S 265006081042503GL - 334D 264912081024602GL -332S 264912081024601GL -332 264843080591502GL - 333I 264843080591501GL - 333S 264843080591503GL - 333D
264532080545902264532080545901264343080511601PB -1843S 264343080511602PB -1843I 264343080511603PB -1843D 264154080480302PB -1822S 264154080480301PB -1822 264050080435502PB -1842I 264050080435501PB -1842S 264050080435503PB -1842D 264814080414302PB -1819S 264814080414301PB -1819 264926080394503PB -1848D 264930080394703PB -1847D 8 Map of the Approximate Inland Extent of Saltwater at the Base of the Biscayne Aquifer, Miami-Dade County, Florida, 2016Table 1-1. Listing of U.S. Geological Survey monitoring sites in southern Florida from which water samples were collected to evaluate specific conductance and chloride concentration.Continued USGS station identifier Site name265138080375802PB -1818S265138080375801PB -1818 265142080374202PB -1817S 265142080374201PB -1817 265208080373902PB -1845I 265208080373901PB -1845S 265208080373903PB -1845D 265200080373101PB -1846S 265428080364502PB -1816S USGS station identifier Site name265428080364501PB -1816265519080364902PB -1815S 265519080364901PB -1815 265701080363103PB -1844D 265701080363102PB -1844I 265701080363101PB -1844S 265839080365202M -1369I 265839080365201M -1369D For more information about this publication, contact:Director, Caribbean-Florida Water Science Center
U.S. Geological Survey
4446 Pet Lane, Suite 108
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PrinosMap of the Approximate Inland Extent of Saltwater at the Base of the Biscayne Aquifer, Miami-Dade County, Florida, 2016 SIM 3380 ISSN 2329-132X (online) https://doi.org/10.3133/sim3380 FLORIDA KEYS AQUADUCT AUTHORITYFLORIDA CITYWITTKOP PARKNEWTONHARRIS PARKEVERGLADES LABOR CAMPSaltline_trends_20180430.mxd - GMB - May 7, 2018 Salt Intrusion at the Base of the Biscayne Aquifer (1,000 mg/L chlorides) US Geological Survey Data 2016 Salt Intrusion Line2011 Salt Intrusion Line1995 Salt Intrusion Line Wellfield Protection AreasMiami-Dade CountySalt Intrusion Extent01234560.5MilesFlorida City CanalCard Sound Road borrow canalDistance fromCoast: 10.6 milesDistance fromCoast: 6.5 miles 0200040006000 80001000012000 140001600018000mg/LDERMClassIPermitRequiredMonitoringinL31ECanalJune2015toMay29,2018SummaryofChlorideResultsTPSWC 1BTPSWC 2BTPSWC 3BMDCChapter24Standard(500mg/L,wasteshallnotincreasenaturalbackgroundmorethan10percent)
I-2I-1I-4I-3EEL2EEL1L31E-FL31E-CL31E-BL31E-EL31E-DL31E-A.Specific Conductance Sampling PointsCanalsMiami-Dade EEL ProgramSFWMDFlorida Power and LightRockmining Lands and Associated MitigationState of FloridaFederalPrivateRockmining Lands and Associated MitigationFlorida Power and LightRockmining Lands and Associated MitigationModel Lands Surface Water Specific ConductanceL-31E borrow canal and Model Lands South canal April 2018DepthSpCond (u/s)T (0.41 m)9100.7 M (1.45m)9097.6B (3.477m)9793L31E-ADepthSpCond (u/s)T (0.25 m)4835.1M (1.021m)9146.1B (2.176m)8642L31E-BDepthSpCond (u/s)T (0.22 m)9224.6 M (1.087m)9245.4B (2.117m)8669.7I-1DepthSpCond (u/s)T (0.49 m)9336.1 M (1.7m)9325.9B (2.499m)9130.6I-2DepthSpCond (u/s)T (0.132m)9462.3 M (1.549m)9460.6 B (2.951m)9322.3L31E-CDepthSpCond (u/s)T (0.24m)21744.3 M (0.891m)21588.7 B (1.841m)21612.6L31E-DDepthSpCond (u/s)T (0.071m)21529.3M (1.493m)21528.6B (2.932m)45473I-3DepthSpCond (u/s)T (0.079m)21347M (0.956m)21377.1B (1.956m)22714.6L31E-EDepthSpCond (u/s)T (0.299m)21580M (0.939m)21534.6B (2.077m)23692.6I-4DepthSpCond (u/s)T (0.179m)21444.5 M (0.707m)21424.5 B (1.653m)31860.2L31E-FDepthSpCond (u/s)T (0.179m)5934.9 EEL2DepthSpCond (u/s)T (0.1m)5408 EEL101.534.560.75Miles
00.5 11.5 22.5 33.5 49/1/201011/1/20101/1/20113/1/20115/1/20117/1/20119/1/201111/1/20111/1/20123/1/20125/1/2012 7/1/20129/1/201211/1/20121/1/20133/1/20135/1/20137/1/20139/1/201311/1/20131/1/20143/1/20145/1/20147/1/20149/1/201411/1/20141/1/20153/1/20155/1/20157/1/20159/1/201511/1/20151/1/20163/1/20165/1/2016 7/1/20169/1/201611/1/20161/1/20173/1/20175/1/20177/1/20179/1/2017Stage (ft NGVD)
September 1, 2010 to September 30, 2017FPL-EMB Culverts raisedfrom 1.8 ftNGVD to 2.2 ftNGVDper CA requirement,10/22/2015 through 4/30/2017 (information provided by FPL) 0 200 400 600 8001000 1200 1400Volume Pumped (MG)Interceptor Ditch Estimated Dry Season Volume Pumped2011 -2016 (January through May) 00.5 1
1.5 2
2.5 30.05.010.015.0 20.025.030.035.040.01/1/20171/8/20171/15/2017 1/22/2017 1/29/20172/5/20172/12/20172/19/20172/26/20173/5/20173/12/2017 3/19/2017 3/26/20174/2/2017 4/9/20174/16/20174/23/2017 4/30/20175/7/20175/14/2017 5/21/2017 5/28/20176/4/20176/11/20176/18/2017 6/25/20177/2/2017 7/9/20177/16/2017 7/23/2017 7/30/20178/6/20178/13/20178/20/20178/27/20179/3/2017Volume (MG)Stage (ft NGVD)ID Daily Pumping Volume (MG)FPL-EMB Culverts raised from 1.8 ftNGVD to 2.2 ftNGVD per CA requirement,10/22/2015 through 4/30/2017 (information provided by FPL) 00.30.60.9 1.2 1.5 1.8 2.1 2.4 0.0 5.010.0 15.0 20.0 25.0 30.0 35.0 40.01/1/20171/8/20171/15/2017 1/22/2017 1/29/20172/5/20172/12/2017 2/19/20172/26/20173/5/20173/12/2017 3/19/2017 3/26/20174/2/2017 4/9/20174/16/2017 4/23/2017 4/30/20175/7/20175/14/20175/21/2017 5/28/20176/4/20176/11/2017 6/18/2017 6/25/20177/2/2017 7/9/20177/16/20177/23/20177/30/20178/6/20178/13/2017 8/20/2017 8/27/20179/3/2017Stage (ft NGVD) 05,00010,00015,000 20,00025,00030,000 35,00040,000
0 5 10 15 20 25 30Salinity(PSU)L31ECanalAverageDailySalinityattheBottomAugust30,2010toJuly16,2018TPSWC 1BAvgDailySalinity(PSU)TPSWC 2BAvgDailySalinity(PSU)TPSWC 3BAvgDailySalinity(PSU) 0 5 10 15 20 25 30 PSU L 31ECanalAverageDailySalinityProfilesJanuary1toJuly16,2018TPSWC 1TAvgDailySalinity(PSU)TPSWC 1BAvgDailySalinity(PSU)TPSWC 2TAvgDailySalinity(PSU)TPSWC 2BAvgDailySalinity(PSU)TPSWC 3TAvgDailySalinity(PSU)TPSWC 3BAvgDailySalinity(PSU)
I-4 I-3 EEL2 EEL1 L31E-F L31E-E L31E-D.Specific Conductance Sampling PointsCanalsMiami-Dade EEL ProgramSFWMDFlorida Power and LightRockmining Lands and Associated MitigationState of FloridaFederalPrivateRockmining Lands and Associated MitigationFlorida Power and LightRockmining Lands and Associated MitigationModel Lands Surface Water Specific ConductanceL-31E borrow canal and Model Lands South canal April 2018DepthSpCond (u/s)T (0.179m)5934.9 EEL2DepthSpCond (u/s)T (0.1m)5408 EEL1 00.40.81.21.60.2Miles