Origins and distribution of saline ground waters in the Floridan Aquifer in coastal southwest Florida
Water-Resources Investigations Report
82-4052
By: W.C. Steinkampf
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Abstract
Twenty-three ground-water samples from the Floridan aquifer in coastal southwest Florida show that water quality deteriorates to the south and west. The waters grade from a fresh calcium magnesium bicarbonate sulfate type to a very saline sodium magnesium chloride type downgradient. Bromide-chloride and specific conductance ratios indicate that dilution of marine-like ground water is a signigicant mechanism in the evolution of the different water types found. Calcium, magnesium , and bicarbonate concentrations occur within a relatively narrow range and are primarily a function of mineral equilibria. Magnesium and strontium concentration distributions suggest several mineral-water interactions, including aragonite inversion, incongruent solution of magnesium calcite to a lower magnesian form, and dedolomitization. Sulfate concentrations increase downgradient and evince gypsum-anhydrite solution, particularly in the fresher waters. The extent to which each factor affects dissolved specie concentrations is a function of the location of the water in the flow system. (USGS)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Origins and distribution of saline ground waters in the Floridan Aquifer in coastal southwest Florida |
| Series title | Water-Resources Investigations Report |
| Series number | 82-4052 |
| DOI | 10.3133/wri824052 |
| Edition | - |
| Year Published | 1982 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey, |
| Description | iv, 38 p. :ill., maps ;28 cm. |
| Google Analytic Metrics | Metrics page |