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Development of water-table and potentiometric-surface maps for Coastal Plain aquifers in the vicinity of the Savannah River Site, South Carolina and Georgia

Conference · · Geological Society of America, Abstracts with Programs; (United States)
OSTI ID:6779668
;  [1]
  1. Geological Survey, Atlanta, GA (United States)

Maps showing the water-table and potentiometric surfaces of four Coastal Plain aquifers in sediments of Late Cretaceous and Tertiary age were developed as part of an evaluation of ground-water flow and stream-aquifer relations in the vicinity of the US Department of Energy, Savannah River Site. Water-table or potentiometric-surface maps were prepared for the Upper and Lower Floridan aquifers, the Dublin aquifer system, and the Midville aquifer system. Over much of the area, the Upper Floridan aquifer is at or near land surface and is mostly under water-table conditions. The other three aquifers are deeply buried over most of the study area and are mostly under confined conditions. The mapped area straddles the Savannah River and covers a 4,750 square-mile area in South Carolina and Georgia. The potentiometric surfaces were plotted using water-level data from 342 wells measured during May 1--12, 1992, together with pressure-head data from 10 flowing wells in the Savannah River Valley measured in September 1993. In areas where the aquifers are unconfined, the altitude of the water table was mapped using measured ground-water levels, stream-stage from 89 sties, and estimated ground-water levels determined from a linear regression model in areas of few data. Altitudes of aquifer tops and bottoms were compared to the altitude of the open interval in each well in which the water level was measured in order to assign waterlevel data from the well to a specific aquifer or aquifer system. This was done by using a geographic information system.

OSTI ID:
6779668
Report Number(s):
CONF-9404221--
Journal Information:
Geological Society of America, Abstracts with Programs; (United States), Journal Name: Geological Society of America, Abstracts with Programs; (United States) Vol. 26:4; ISSN GAAPBC; ISSN 0016-7592
Country of Publication:
United States
Language:
English