Geohydrology of the Floridan aquifer in the Withlacoochee River basin of the Southwest Florida Water Management District

Surface-Water and Groundwater Interactions along the Withlacoochee River, West-Central Florida

“…The intermediate confining unit underlies the surficial aquifer and consists of siliclastic sediments of Miocene age that include interbedded sand, clay, limestone, sandy phosphatic limestone, and marl (Anderson and Laughlin, 1982). The confining unit is thin and discontinuous toward the north and along the stream channels, except for a few erosional remnants associated with the ridges.…”

Reconnaissance of geohydrologic areas and 1981 low-flow conditions, Withlacoochee River basin, southwest Florida Water Management District

“…These deposits, which range in age from late Miocene to Holocene, are breached in many places by sinkholes. The thickest of these deposits are the Alachua Formation of Pliocene age, and the parts of the Hawthorn Formation that are not hydraulically connected with underlying formations (Anderson and Laughlin, 1982) . The Alachua Formation occurs in parts of Levy, Marion, Citrus, and Hernando Counties.…”

“…Yields from wells in the Upper Floridan aquifer, which is virtually the sole source of large ground-water supplies in the Basin, generally are high. Anderson and Laughlin (1982) report specific capacity data for 13 wells in the Basin to range from 1.5 to 640 (gal/min)/ft (gallons per minute per foot) of drawdown. Specific capacities for 8 of these 13 wells are greater than 100 (gal/min)/ft.…”

“…Results of the Phase I investigation are published in U.S. Geological Survey Water-Resources Investigations Open-File Report 82-331 (Anderson and Laughlin, 1982). The most pertinent conclusions from that report are: 1.…”

Water resources and effects of development in Hernando County, Florida

“…The largest lake included in the study, Lake Hancock (site 5, fig. 8), 519 acres (Gant, 1982, p. 20 Anderson and Laughlin, 1982).…”