| Abstract: | The sand-and-gravel aquifer is the only freshwater aquifer in southern Escambia County, Fla. Problems related to the development of the aquifer include sustained yield, contamination, and saltwater intrusion. A digital model was applied to the sand-and-gravel aquifer in central and southern Escambia County treating the aquifer ‘s ‘main producing zone ‘ as a discrete, leaky, confined aquifer. Under conditions of no pumping, most values for the final-head matrix agreed with assumed values within 4 feet in the area of principal interest. Discharge per unit land area was 1.04 cubic feet per second per square mile, in close agreement with the base runoff streams maintained by the aquifer. Total natural aquifer discharge within the area of principal interest determined by the model was 159 million gallons per day. The applicability of the present non-unique calibration for predicting the effects of pumping is questionable; a multilayered model may be required. Effluent infiltrating from holding lagoons for spray irrigation at the Scenic Hills Sewage Plant may have affected the quality of local perched ground water in the sand-and-gravel aquifer. Observation wells drilled near areas of heavy pumping around Bayou Chico indicated no saltwater intrusion. (Woodard-USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 30195 |
| Citation Author: | Trapp, Henry Jr. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | iv, 57 p. :ill., maps ;27 cm. |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 77-96 |
| Citation Search Results Text: | Preliminary hydrologic budget of the sand-and-gravel aquifer under unstressed conditions : with a section on water-quality monitoring, Pensacola, Florida; 1978; WRI; 77-96; Trapp, Henry Jr. |
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| Citation Year: | 1978 |
| Type: | citation/reference |
| Text: | Preliminary hydrologic budget of the sand-and-gravel aquifer under unstressed conditions : with a section on water-quality monitoring, Pensacola, Florida; 1978; WRI; 77-96; Trapp, Henry Jr. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
