thumbnail

Preliminary hydrologic budget of the sand-and-gravel aquifer under unstressed conditions: with a section on water-quality monitoring, Pensacola, Florida

Water-Resources Investigations Report 77-96
By:
https://doi.org/10.3133/wri7796

Links

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)

Suggested Citation

Trapp, H., 1978, Preliminary hydrologic budget of the sand-and-gravel aquifer under unstressed conditions: with a section on water-quality monitoring, Pensacola, Florida: U.S. Geological Survey Water-Resources Investigations Report 77-96, iv, 57 p. , https://doi.org/10.3133/wri7796.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Preliminary hydrologic budget of the sand-and-gravel aquifer under unstressed conditions: with a section on water-quality monitoring, Pensacola, Florida
Series title Water-Resources Investigations Report
Series number 77-96
DOI 10.3133/wri7796
Year Published 1978
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description iv, 57 p.
Country United States
State Florida
City Pensacola
Additional publication details