Hydrology - Water Resources Report 23

Potentiometric Map of the Floridan and Tertiary Sand Aquifer in
South Carolina - 1998

Brenda L. Hockensmith


The potentiometric surface of the Floridan aquifer and its updip clastic equivalent, the Tertiary sand aquifer, shows a generally southeastward ground-water flow affected by several potentiometric depressions. Cones of depression have developed because of ground-water pumping in the Summerville-Charleston area, and at Walterboro and Eutawville. Water levels in Jasper and Beaufort Counties continue to be affected by pumping in the Savannah, Ga. area.

Comparing the 1998 data with historical data shows that water levels near the outcrop areas have not changed significantly. In areas influenced by pumping, water levels have declined 40 to 95 feet during various periods of record.

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Paper or electronic versions of this report are available from the SCDNR's Columbia office.