Physical and Hydrochemical Evidence of Surface-water/Ground-water Mixing in and near Lake Seminole, Southwestern Georgia and Northwestern Florida
Author(s)
Torak, Lynn J.
Advisor(s)
Editor(s)
Hatcher, Kathryn J.
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Abstract
Water resources of the Lake Seminole area in the lower Apalachicola-Chattahoochee-Flint River Basin emanate from an interconnected aquifer-stream-reservoir system that is centered around a constructed lake in a karst hydrogeologic setting. Ground water enters stream channels and the lake bottom by diffuse
leakage and springflow; this water contains dissolved minerals from carbonate formations of the Upper Floridan aquifer. Water samples from wells adjacent to Lake Seminole contain higher concentrations of
calcium and magnesium, and higher alkalinity, and specific conductance than surface-water samples, which
contain relatively high concentrations of total organic
carbon and sulfate. Each of the four impoundment arms
of Lake Seminole has a distinct water chemistry that can be attributed in part to the hydrodynamic
connection of the lake bottom with the ground-water
flow regime Water chemistry and incremental
discharge measurements in the Spring Creek
impoundment arm indicate predominant ground-water
discharge from the Upper Floridan aquifer into the lake. Chemical analyses and physical properties of water sampled from the dam pool and Apalachicola River indicate upwelling of lake water in the river
downstream of Jim Woodruff Lock and Dam.
Sponsor
Sponsored and Organized by: U.S. Geological Survey, Georgia Department of Natural Resources, Natural Resources Conservation Service, The University of Georgia, Georgia State University, Georgia Institute of Technology
Date
2001-03
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Text
Resource Subtype
Proceedings