Potentiometric surface map of the Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, September, 1977
Water-Resources Investigations Report
78-69
By: F. A. Watkins, C. P. Laughlin, and E. C. Hayes
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Abstract
This map presents the potentiometric surface of the Floridan aquifer in the St. Johns River Water Management District and vicinity for September 1977. The Floridan aquifer is the principal source of potable water in the area. Water-level measurements were made on approximately 900 wells and springs. The potentiometric surface is shown by 5-foot contours except in the Fernandina Beach area where 10- and 20-foot contours are used to show the deep cone of depression. This is the first map covering the entire St. Johns River Water Management District and vicinity for September, a high water-level period. The potentiometric surface ranged from 130 feet above mean sea level in Polk County to 131 feet below sea level in Nassau County. (Woodard-USGS)
Suggested Citation
Watkins, F.A., Laughlin, C.P., Hayes, E.C., 1977, Potentiometric surface map of the Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, September, 1977: U.S. Geological Survey Water-Resources Investigations Report 78-69, 1 Plate: 18.81 x 41.97 inches, https://doi.org/10.3133/wri7869.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Potentiometric surface map of the Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, September, 1977 |
| Series title | Water-Resources Investigations Report |
| Series number | 78-69 |
| DOI | 10.3133/wri7869 |
| Year Published | 1977 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 1 Plate: 18.81 x 41.97 inches |
| Country | United States |
| State | Florida |
| Other Geospatial | St. Johns River Water Management District |