Water-resources information for the Withlacoochee River region, west-central Florida

Water-Resources Investigations Report 81-11

, , , , and


  • The Publications Warehouse does not have links to digital versions of this publication at this time
  • Download citation as: RIS | Dublin Core


Daily water use in the Withlacoochee River region in 1977 averaged about 2,005 million gallons per day, 94 percent being saline surface water used in thermoelectric power-generation cooling. The largest user of freshwater was Hernando County, using 43.02 million gallons per day. The Floridan aquifer in the region consists mostly of limestones and dolomites, and is as much as 1,500 feet thick. Transmissivities are known to be as high as 25 million feet squared per day. Yields of 2,000 gallons per minutes from 12-inch wells are possible. Although the range in fluctuations of the potentiometric surface is as great as 20 feet, no significant change has occurred since the 1930 's when data were first collected. The quality of water in the Floridan aquifer is generally excellent. Saltwater is present in the aquifer near the Gulf Coast and in extreme east Marion County, near the St. Johns River. The predominant chemical type for both streams and springs is calcium and magnesium bicarbonate due to the dissolution process of the carbonate rocks. The majority of the streams have average dissolved-solid concentrations between 100 and 200 milligrams per liter, maximum-observed specific conductance between 250 and 750 micromhos per centimeter, and average total nitrogen concentrations of less than 1.2 milligrams per liter. (USGS)

Additional publication details

Publication type:
Publication Subtype:
USGS Numbered Series
Water-resources information for the Withlacoochee River region, west-central Florida
Series title:
Water-Resources Investigations Report
Series number:
Year Published:
U.S. Geological Survey,
xi, 130 p. :ill., maps ;28 cm.