Geology topics
Source-linked reports with geographic coverage including Dade County, Monroe County, Florida.
This report describes the collection, processing, and interpretation of time-domain electromagnetic soundings from Everglades National Park. The results are used to locate the extent of seawater intrusion in the Biscayne aquifer and to map the base of the Biscayne aquifer in regions where well coverage is sparse. The data show no evidence of fresh, ground-water flows at depth into Florida Bay.
The utilization of the Floridan aquifer as a source of potable water has increased. The use of the Floridan aquifer for subsurface storage of freshwater, and as an industrial water supply in Dade and Monroe Counties, is being considered by water management authorities and some industries. Information on locations, depths, casings, and year drilled for 67 wells that penetrate the Floridan aquifer in Dade and Monroe Counties is presented to assist in planning future uses of the Floridan. Chloride concentrations in water from wells ending in the Floridan aquifer in Dade County ranged from 1,200 to 9,000 milligrams per liter. In Monroe County the chloride concentrations ranged from 1,600 to 20,000 milligrams per liter. Water levels were measured in selected wells to determine the altitude of the potentiometric surface. The measurements indicate that the 40-foot potentiometric line extends from southern Dade County to the upper Florida Keys.