Evaluation of ground-water flow and hydrologic budget for Lake Five-O, a seepage lake in northwestern Florida
By: by J.W. Grubbs ; prepared in cooperation with the U.S. Environmental Protection Agency and the Florida Department of Environmental Protection.
Contributors: Geological Survey (U.S.); United States. Environmental Protection Agency.; Florida. Dept. of Environmental Protection.
Series: Water-resources investigations report -- 94-4145.
Publisher: U.S. Geological Survey; Earth Science Information Center, Open-File Reports Section [distributor]
Published: 1995
Place of publication: Tallahassee, Fla; Denver, CO
Language: eng
Number of pages: 42
Subjects: Groundwater flow -- Florida -- Five-O, Lake.; Five-O, Lake (Fla.)
Other titles: Evaluation of ground water flow and hydrologic budget for Lake Five-O, a seepage lake in northwestern Florida.
Description: Temporal and spatial distributions of ground-water inflow to, and leakage from Lake Five-O, a softwater, seepage lake in northwestern Florida, were evaluated using hydrologic data and simulation models of the shallow ground-water system adjacent to the lake. The simulation models indicate that ground-water inflow to the lake and leakage from the lake to the groundwater system are the dominant components in the total inflow (precipitation plus ground-water inflow) and total outflow (evaporation plus leakage) budgets of Lake Five-O. Simulated groundwater inflow and leakage were approximately 4 and 5 times larger than precipitation inputs and evaporative losses, respectively, during calendar years 1989-90. Exchanges of water between Lake Five-O and the ground-water system were consistently larger than atmospheric-lake exchanges. A consistent pattern of shallow ground-water inflow and deep leakage was also evident throughout the study period. The mean time of travel for groundwater that discharges at Lake Five-O (time from recharge at the water table to discharge at the lake) was estimated to be within a range of 3 to 6 years. Flow-path evaluations indicated that the intermediate confining unit probably has a negligible influence on the geochemistry of groundwater inflow to Lake Five-O. The hydrologic budgets and flow-path evaluations provide critical information for developing geochemical budgets for Lake Five-O, and for improving the understanding of the relative importance of various processes that regulate the acid-neutralizing capacity of softwater seepage lakes in Florida.
Notes: Includes bibliographical references (p. 40-41).

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