| 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) |
| Genre: | USGS Numbered Series |
| ProdID: | 30394 |
| Citation Author: | Watkins, F. A.; Laughlin, C. P.; Hayes, E. C. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | 2 maps ;on sheet 107 x 77 cm. fold. to 28 x 20 cm. |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 78-69 |
| Citation Search Results Text: | Potentiometric surface map of the Floridan Aquifer in the St Johns River Water Management District and vicinity, Florida, September, 1977; 1977; WRI; 78-69; Watkins, F. A.; Laughlin, C. P.; Hayes, E. C. |
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| Citation Year: | 1977 |
| Type: | citation/reference |
| Text: | Potentiometric surface map of the Floridan Aquifer in the St Johns River Water Management District and vicinity, Florida, September, 1977; 1977; WRI; 78-69; Watkins, F. A.; Laughlin, C. P.; Hayes, E. C. |
| 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, |
