The ground-water system in west-central Florida is composed of, in descending order, the surficial (usually unconfined) aquifer, intermediate aquifer and confining beds, Floridan aquifer, and lower confining bed. Aquifer test data were analyzed to determine transmissivity, storage coefficient, leakance, and vertical hydraulic conductivity of the aquifers and confining beds. Transmissivities obtained from 29 aquifer tests range from 1,900 to 920,000 feet squared per day for parts of the Floridan aquifer, about 740 to 7,800 feet squared per day for the intermediate aquifer, and about 220 to 600 feet squared per day for the surficial aquifer. Storage coefficients obtained from aquifer tests range from 0.00013 to 0.0015 for the Floridan aquifer, 0.00005 to 0.00017 for the intermediate aquifer, and 0.004 to 0.02 for the surficial aquifer. The values of leakance obtained from aquifer tests range from 0.00005 to 0.009 feet per day per foot for the Floridan and 0.0002 to 0.0007 feet per day per foot for the intermediate aquifer. (USGS)

Water-Resources Investigations Report↗

USGS1984

Impacts of the Tampa Bypass Canal system on the areal hydrology, Hillsborough County, Florida

Construction of the Tampa Bypass Canal, Florida has resulted in an increase in streamflow from the canal area. Base-flow discharge is more than twice preconstruction amounts. Discharge from springs has decreased by one half or more. Ground-water levels show an increase of up to 4 feet near structure S-160 due to impoundment of water. Elsewhere, levels have generally decreased by 2 to 4 feet. Some minor changes in water quality have occurred. Some of the changes, however, may be attributed to factors other than canal construction. (USGS)

Water-Resources Investigations Report↗