Skip to main content
U.S. flag

An official website of the United States government

Freshwater resources of Big Pine Key, Florida

January 1, 1980

The principal freshwater-bearing unit underlying Big Pine Key is a layer of oolitic limestone averaging 19 feet in thickness. The freshwater exists in two separate lenses, one in the northern half of the island and one in the southern half. The slightly larger north lens is separated from the south lens by a low-lying area 1 to 3 feet above NGVD of 1929. The lenses float on saltwater in the aquifer and are affected by tidal fluctuations. The areal and depth configuration of the lenses fluctuate in response to rainfall, evapotranspiration, lateral and vertical losses, and pumpage from local wells. The lenses are not a major source of freshwater. Only a small amount of the freshwater in the lenses can be removed before saltwater intrusion will occur.

Publication Year 1980
Title Freshwater resources of Big Pine Key, Florida
DOI 10.3133/ofr80447
Authors Chris E. Hanson
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Open-File Report
Series Number 80-447
Index ID ofr80447
Record Source USGS Publications Warehouse