Hockensmith, Brenda L

Howard, C. Scott

Koch, Erin

Wachob, Andrew

English

Clemson University: TigerPrints

Potentiometric surface mapsPresented here are the most recent potentiometric surface maps developed by the South Carolina Department of Natural Resourc-es (SCDNR) for each of South Carolina’s three major aquifers.The Middendorf, Black Creek, and Floridan aquifers are the three major aquifers of the Coastal Plain of South Carolina and are im-portant sources of water for many public, industrial, and agricul-tural supplies. In an effort to assess groundwater conditions in these three aquifers and to identify areas where declining water levels may be a concern, the SCDNR regularly maps the poten-tiometric surface of each aquifer. The potentiometric surface of an aquifer is defined by the elevations at which water stands in tightly cased wells completed in that aquifer.Potentiometric surface maps are a valuable tool for assessing groundwater conditions throughout the Coastal Plain, as they help to identify areas where excessive pumping has lowered ground-water levels to an extent that groundwater management strategies should be developed and implemented. Comparing maps of the same aquifer created at different times can help indicate regional trends in groundwater levels.Water-level data used for these maps were collected primarily by the SCDNR, with assistance from the U.S. Department of Ener-gy, the South Carolina Department of Health and Environmental Control, and the U.S. Geological Survey. The boundaries of the aquifers used in these investigations are those defined by Aucott, Davis, and Speiran (1987).Middendorf aquifer—2011The potentiometric map of the Middendorf aquifer presented here was constructed by using water levels measured in 136 wells in late 2011. More detailed information about this map and the wells used to construct it can be found in SCDNR Water Resources Report 54 (Hockensmith and others, 2013a).SCDNR has produced similar potentiometric maps for the Mid-dendorf aquifer for the years 2009, 2004, 2001, and 1996 (see Hockensmith and others, 2013a). Like on previous maps, the 2011 potentiometric surface shows that the generally southeast-ward groundwater flow is affected by several potentiometric lows. These cones of depression, which have developed because of groundwater pumping in Florence, Williamsburg, Berkeley, and Charleston Counties, are generally consistent in size and depth with how they appeared in 2009.Black Creek aquifer—2012The potentiometric map of the Black Creek aquifer was con-structed by using water levels measured in 100 wells in late 2012. More detailed information about this map and the wells used to construct it can be found in SCDNR Water Resources Report 55 (Hockensmith and others, 2013b).SCDNR has produced similar potentiometric maps for the Black Creek aquifer for the years 2009, 2004, 2001, and 1995 (see Hockensmith and others, 2013b). Consistent with the maps pro-duced in those previous years, the potentiometric surface in 2012 shows that the generally southeastward groundwater flow is affected by several potentiometric lows. The cones of depres-sion that have developed because of groundwater pumping in Georgetown, Florence, and Williamsburg Counties are 25 to 50 feet deeper in 2012 than they were on the 2009 map.Floridan/Tertiary sand aquifer—2013The potentiometric map of the Floridan aquifer and its updip clastic equivalent, the Tertiary sand aquifer, was constructed us-ing water levels measured in 212 wells in late 2013. More de-tailed information about this map and the wells used to construct it can be found in SCDNR Water Resources Report 56 (Wachob and others, 2014).SCDNR has produced similar potentiometric maps for the Flor-idan and Tertiary sand aquifers for the years 2010, 2004, 1998, and 1986 (see Wachob and others, 2014). Consistent with pre-vious potentiometric surface maps of the Floridan/Tertiary sand aquifer, the potentiometric surface for late 2013 indicates a gen-erally southeastward groundwater flow, with water levels in Jas-per and Beaufort Counties affected by pumping in the Savannah, Ga. area. Unlike earlier maps, however, no significant cones of depression are delineated on the 2013 map.Of the 158 wells measured for both this map and the previous (2010) map, 104 wells had higher potentiometric levels in 2013, while 31 wells had lower potentiometric levels in 2013. Changes in potentiometric levels from 2010 to 2013 were generally less than 5 feet, although a few wells showed significantly higher wa-ter levels, probably owing to reductions in local pumping rates.ReferencesAucott, W.R., Davis, M.E., and Speiran, G.K., 1987, Geohydrologic framework of the Coastal Plain aquifers of South Carolina: U.S. Geological Survey Water-Resources Investigations Report 85-4271, 7 sheets.Hockensmith, B.L., Wachob, A., Howard, C.S., and Koch, E.,  2013a, Potentiometric surface of the Middendorf aquifer in South Caro-lina, November 2011: South Carolina Department of Natural Re-sources, Water Resources Report 54, 1 sheet.   2013b, Potentiometric surface of the Black Creek aquifer in South Carolina, November 2012: South Carolina Department of Natural Resources, Water Resources Report 55, 1 sheet.Miller, J.A., 1985, Geohydrologic framework of the Floridan aquifer system in Florida, Georgia, and parts of Alabama and South Car-olina: U.S. Geological Survey Professional Paper 1403-B, 91 p., 33 plates.Wachob, A., Hockensmith, B.L., Luciano, K., and Howard, C.S., 2014, Potentiometric surface of the Floridan and Tertiary sand aquifer in South Carolina, November 2013: South Carolina Department of Natural Resources, Water Resources Report 56, 1 sheet.For more information about the this program, contactAndrew Wachob, HydrologistLand, Water and Conservation DivisionSouth Carolina Department of Natural Resources1000 Assembly StreetColumbia, SC 29201phone: 803-734-6440email: wachoba@dnr.sc.govThese map reports are available through the SCDNR website:http://dnr.sc.govPotentiometric Surface Maps of the Middendorf, Black Creek, and Floridan Aquifers of South CarolinaAndrew Wachob, Brenda L. Hockensmith, C. Scott Howard, and Erin KochSouth Carolina Department of Natural Resources—Land, Water and Conservation Divisionhttp://dnr.sc.govMARIONRICHLAND SUMTERFLORENCEORANGEBURGDORCHESTERCLARENDONLEXINGTONCALHOUNEDGEFIELDSALUDABAMBERGBARNWELLAIKENCOLLETONHAMPTONALLENDALEHORRYWILLIAMSBURGGEORGETOWNBERKELEYJASPERCHARLESTONBEAUFORTWalterboroBambergOrangeburgAikenHiltonHeadIslandKiawah IslandIsle of PalmsSullivans IslandSeabrookIslandSt. StephenSummervilleMoncks CornerBeaufortCharlestonMt.Pleasant  North   Fork   Edisto South Fork Edisto  Coosawhatchie   River    Salkehatchie                        River       Combahee River      Edisto  River LakeMoultrieLake MarionSantee River Black River Savannah  River BeaufortHilton HeadIsland0 2 4 6 10 miles8FrippIslandPritchardsIslandSt. HelenaIslandHuntingIsland844159218142309101429435486231424054362402JAS-397441704779697220079878718102404219823082245744709676123916094881540159916054521604982170147155915831970154856360044945556497611817361925171419839213061689173323015015021330 23032306131113324082401184518462305374-10-143-1-1-1-7-8-53-5-9-8-7-40-4-9-3-9-1-1-8-114-26-4011-2-2-52114053-51343-15113330-4372223211-7-8-6-12-10-8-14-13-4All wells shown on this inset are located in Beaufort County (except JAS-397). To simplify this presenta-tion, only the numerical component of the well number is shown (e.g., “564” rather than “BFT-564”).AIK-849AIK-868AIK-890AIK-877BAM-22BAM-31BAM-11BAM-33ORG-431ORG-48DOR-168ORG-9BRK-177BRK-165BRK-166BRK-523BRK-48BRK-644BRK-147BRK-35BRK-647DOR-58DOR-240BRK-174CHN-422CHN-101BRK-595CHN-803COL-232COL-220COL-284COL-273COL-73COL-255COL-97DOR-49DOR-155BAM-81BAM-26BAM-75BAM-74BAM-68COL-269COL-274COL-275 COL-253COL-96COL-294CHN-363CHN-460CHN-44COL-301CHN-220COL-51CHN-484COL-243COL-92COL-170COL-782BFT-1212BFT-145COL-164BFT-461HAM-83HAM-73HAM-76HAM-74HAM-175HAM-77HAM-79HAM-72HAM-181HAM-122HAM-174HAM-180HAM-314JAS-402ALL-442JAS-397JAS-298JAS-490JAS-420ALL-364ALL-373 ALL-330BRN-295BRN-350BRN-416BRN-405BRN-396BRN-345BRN-341BFT-301JAS-421JAS-499BFT-2247JAS-425BRN-360BRN-399ORG-642ORG-637ORG-635ORG-640ORG-636ORG-641ORG-638ORG-639ALL-408BAM-125JAS-351JAS-364JAS-474JAS-403BRN-390BRN-409BRN-362BRN-420BRN-428BRN-434BRK-141CHN-802CHN-989COL-794COL-795COL-796COL-793COL-786COL-787COL-788COL-785COL-790COL-791COL-792COL-789COL-798COL-797DOR-30DOR-68HAM-51HAM-261BFT-420546154461424212454-43960-30-31-32-25-13-13-19-15-8-2-642926-16-13 -1820-23-236987103-26-2146913635-25230171912071172581632412352102581431582161871341331481041671801851211331325275339154 1491211111026956396865477-11-3-4-876-34-43-11-4-4-1817115111421819227721624016831-5-285847-15-3-25758935-14-1828-131318285828 302217128675130922541051312035-2 I I I I I I  I  I I I 40602080140160100120180220200240240608014016010012018022020040200-20-200240608014016010012018022020040200-20-2012026000010 0 10 20 30 40 miles³Potentiometric contour for the Floridan/Tertiary sand aquifer,in feet relative to sea level; dashed where inferred Updip limit of Tertiary sand aquifer (Aucott and others, 1987)Updip limit of extended Floridan aquifer (Aucott and others, 1987)Updip limit of Floridan aquifer (Miller, 1985)Updip limit of upper Floridan aquiferMeasured well, with county well number and potentiometric elevationMunicipalityEXPLANATIONWalterboroCOL-255 -220FAIRFIELDMARIONDILLONCHESTERFIELDLANCASTERDARLINGTONMARLBORORICHLANDLEEKERSHAWSUMTERFLORENCEORANGEBURGDORCHESTERCLARENDONLEXINGTONCALHOUNSALUDAEDGEFIELDBAMBERGBARNWELLAIKENCOLLETONHAMPTONALLENDALEHORRYWILLIAMSBURGGEORGETOWNBERKELEYJASPERCHARLESTONBEAUFORTWalterboroBambergOrangeburgAikenHemingwaySt.StephenSummervilleMoncksCornerFlorenceSumterBishopvilleDillonMarionMyrtle BeachBeaufortCharlestonMt.Pleasant  North   Fork  Edisto South Fork Edisto  Coosawhatchie     River    Salkehatchie      River       Combahee           River      Edisto  River LakeMoultrieLakeMarionLakeWatereeLakeMurrayWateree River  Congaree River Santee River Black River River Lynches Great Pee Dee River River Little Pee Dee Waccamaw River Savannah  River  I  I I I I I I I I I I I I  I  I  I I I I I I I I I  I  I  I  I  I  I  I  I  I  I I I I I I I I I I I  I  I  I I I I I I I I I I I  I  I  I   I I  I I I I I I I I  I  I  I  I  I  I  I  I I  I I I I I I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I  I  I I  I  I I I I I I I I I I I I I I  I I I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I  I  I I  I  I I  I  I I  I  I I I I I I I I I I I I I I I I I I I I I I I  I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I  I  I I  I  I I  I  I I  I  I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I  I I  I I  I  I I  I  I I  I  I I  I  I I  I  I I  I  I  I  I I  I  I I  I  I I  I  I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I0-25-50-50-752550-750-25-50-75-100-125-150-1751001251501001251501752002252502753003252550752550751500175200225250275100125150150175200225250275300325752550COL-30ALL-369BRN-437BRN-353BRN-355BRN-412BRN-328BRN-389BRN-406BRN-363AIK-2450AIK-2379AIK-2378AIK-497AIK-887AIK-2468AIK-469AIK-846AIK-847AIK-848AIK-2564AIK-859ORG-548LEX-823ORG-393ORG-388ORG-385ORG-509 CAL-2BAM-7BAM-27AIK-824AIK-873BRN-431BRN-392ALL-367ALL-368ALL-376BRN-402BRN-325BRN-324BRN-424BRN-368BRN-365SUM-297SUM-288SUM-497DAR-118DAR-98FLO-85FLO-207 FLO-317FLO-276FLO-180FLO-148DIL-28DIL-70MRN-9HOR-225HOR-1041HOR-666HOR-307CLA-36CLA-148CLA-27CLA-213CLA-32CLA-33CLA-146CLA-61CLA-30CLA-63FLO-156SUM-296FLO-298HOR-304HOR-332HOR-1235HOR-207HOR-419HOR-290HOR-309HOR-319GEO-249GEO-233GEO-78GEO-153WIL-196GEO-296GEO-77WIL-177WIL-51WIL-16WIL-193WIL-32WIL-355CHN-182BRK-89GEO-188BRN-331451381161831971341282837872125157-16464102154305094-9-4613-6759-146-128-103-116-29-185-45-40-25-2714 -35-262943-35-38-44-66-1-78-61-75-64-16-69-61-786271228513464 49949274155151151139151151160160168200200210226215262267267293283329328304233161162155167186186170166161170 159169176178FALL                   LINE Potentiometric contour for the Black Creek aquifer, in feet relative to sea level; dashed where inferredUpdip limit of Black Creek aquifer (Aucott and others, 1987)Outcrop area of Black Creek aquifer (Aucott and others, 1987)Measured well, with county well number and potentiometric elevationEXPLANATION10 0 10 20 30 40 miles³MunicipalityWalterboroCLA-213 6225FAIRFIELDMARIONDILLONCHESTERFIELDLANCASTERDARLINGTONMARLBORORICHLANDLEEKERSHAWSUMTERFLORENCEORANGEBURGDORCHESTERCLARENDONLEXINGTONCALHOUNSALUDAEDGEFIELDBAMBERGBARNWELLAIKENCOLLETONHAMPTONALLENDALEHORRYWILLIAMSBURGGEORGETOWNBERKELEYJASPERCHARLESTONBEAUFORTWalterboroBambergOrangeburgAikenHiltonHeadIslandKiawah IslandIsle of PalmsSullivans IslandSeabrookIslandHemingwaySt. StephenSummervilleMoncks CornerFlorenceSumterBishopvilleDillonMarionMyrtleBeachBeaufortCharlestonMt. Pleasant  North   Fork  Edisto South Fork Edisto  Coosawhatchie     River    Salkehatchie      River       Combahee           River      Edisto  River LakeMoultrieLakeMarionLakeWatereeLakeMurrayWateree River  Congaree River Santee River Black River River Lynches Great Pee Dee River River Little Pee Dee Waccamaw River Savannah  River Isle ofPalmsSullivansIslandCharlestonMountPleasant10 5 miles2 3 4CHN-635CHN-604CHN-2CHN-178CHN-603CHN-173CHN-601CHN-163CHN-187CHN-849 CHN-219CHN-185 I  I  I  I  I  I  I  I  I  I  I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I   I  I  I  I  I  I I I I I I I I I I I I I I I I I I I I  I  I  I-75-50 250-25-332-25-23-8312-7-30 2333-49-33I  I  I  I I I I I I I I I I I I I I I I  I  I  I  II  I  I  I  I  I  I I  I  I  I  I  I  I  I  I  I  I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I I I I I  I  I  I  I  I  I  I I  I I I I I I II I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I  I  I I I I I I I I I I I I I I I  I  I  I I I I I I I I I I I I I I I  I  I  II  I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I  I  II  I I  I  I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I  I  I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I  I I  I I  I  I I  I  I I  I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I  I I  I I  I I  I I  I I  I I  I I  I  I  I  I  I  I  I  I I  I  I  I  I  I  I  I  I  I  I  I I  I  I  I  I  I  I  I I  I  I I  I  I  I  I  I  I  I I  I  I I  I  II  I I I I I I I I I I I  I  II  I  I  I  I  I I I I I I I I I I I I I I  I  I  I  I  ICLA-25WIL-207WIL-118WIL-208WIL-203WIL-211WIL-37WIL-213WIL-212DIL-132DIL-79DIL-129MLB-31MLB-140MLB-110KER-100KER-98RIC-729RIC-585COL-49COL-50LEX-838BRK-654BRK-431DOR-88DOR-228LEE-178LEE-36LEE-60LEE-73SUM-84SUM-332SUM-364MRN-69MRN-68FLO-153FLO-146DAR-230DAR-231DAR-96LEE-79CTF-197CTF-56CTF-80CTF-313CTF-228CTF-222CTF-224CTF-211CTF-44BFT-10BFT-11BFT-454DOR-221CHN-801CHN-186CHN-174CHN-172CHN-2CHN-183MLB-112MLB-139MLB-27SUM-119DAR-212DAR-221DAR-94DAR-208FLO-95FLO-209AIK-892AIK-866AIK-865AIK-643AIK-871BRN-313BRN-438BRN-385BRN-417BRN-312BRN-382BRN-314BRN-383BRN-384BRN-316BRN-335BRN-303BRN-370BRN-423BRN-430BRN-379BRN-243BRN-327BRN-246BRN-330RIC-543HOR-973FLO-274SUM-492CLA-3CLA-20SUM-488LEE-75DAR-228LEX-844AIK-817AIK-818AIK-902AIK-2380ALL-348ALL-377ALL-358ALL-370ALL-347BRN-366BRN-358BRN-356BRN-349ORG-79FLO-128DIL-121AIK-826AIK-845SUM-230JAS-426-81219263168239156182187215135198298779076 8 -5-22-21-16-41-34-8-4648977399-5033328468159117746211415711013029145185108888511461692817272235148125167133195435321276322286212299711010257-2126112113151180179181198181178182210170164177174174177185205205185174170178211169180179179163182170214269268234232168 192163163217195-74-18-13-33-33-869712610015012517520025022527550250757510050-7575501005025075100-25150125175200250225275300350325375400150125175200250225275-25-50-757510050 25 05075100125250-25507510012525 015017520025022527530035040075I  I  I  I  I  I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I  I  I  I  I  I  I  I  I  I  I  I  I  250-25 -500-2525FALL                   LINE Potentiometric contour for the Middendorfaquifer, in feet relative to sea level;dashed where inferredOutcrop area of Middendorf aquiferMeasured well, with county well number and potentiometric elevationEXPLANATION17510 0 10 20 30 40 miles³MunicipalityWalterboroCOL-49 102Middendorf aquifer, 2011Black Creek aquifer, 2012Floridan/Tertiarysand aquifer, 2013

Potentiometric Surface Maps of the Middendorf, Black Creek, and Floridian Aquifers of South Carolina

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Potentiometric Surface Maps of the Middendorf, Black Creek, and Floridian Aquifers of South Carolina

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