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A. Dan Duerr

Publications and source records attributed to A. Dan Duerr.

3 recordsLinked to original sources
USGS1979

Hydrologic data for the Morris Bridge well-field area, Hillsborough County, Florida, 1971-78

Well data are summarized for 102 wells constructed in the Morris Bridge well-field area in north-central Hillsborough County. Of the wells reported, 20 are public-supply wells that have yields averaging 1,800 gallons per minute and specific capacities that range from 36 to 346 gallons per minute per foot of drawdown. Also presented are 28 drillers' logs, 7 lithologic logs, and an index of 64 geophysical logs of 18 wells in the well-field area. The report also includes hydrographs of water levels of 10 observation wells, hydrographs of stream stage and streamflow of the Hillsborough River, and hydrographs of rainfall for two stations.

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USGS1975

The potentiometric surface and water quality of the Floridan aquifer; in southwest Hillsborough County, Florida, 1952-74

Large ground-water withdrawals and a 10-year period of below- normal rainfall have caused the potentiometric surface of the Floridan aquifer to decline more than 10 feet (3 metres) in most of a 200- square-mile (520-square-kilometre) area of southwest Hillsborough County (fig. 1). The lowered ground-water levels and the consequent threat of salt-water intrusion concern farmers and residents who depend on ground water for irrigation and domestic purposes. Exten sive crop irrigation is continuing; small towns such as Ruskin, River- view, Sun City Center, and Apollo Beach are rapidly expanding; and new communities are being planned. In addition, there are plans to mine the extensive phosphate deposits a few miles east of this heavily- f armed area. All these activities require large supplies of fresh ground water. The Hillsborough County Commission cooperated with the U. S. Geological Survey to study changes of water levels and water quality in southwest Hillsborough County. The purpose of this report is to compare the position of the potentiometric surface in 1953 with that in 1973 and to show chloride and sulfate concentrations in ground water in 1974.

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