| Abstract: | This map presents the potentiometric surface of the Floridan aquifer in the St. Johns River Water Management District and vicinity for May 1981. The Floridan aquifer is the principal source of potable water in the area. Water-level measurements were made in approximately 1,000 wells and at several springs. The potentiometric surface is shown mostly by 5-foot contour intervals. In the Fernandina Beach area 20 and 40-foot intervals are used to show a deep cone of depression. The potentiometric surface ranged from 122 feet above NGVD (National Geodetic Vertical Datum of 1929) in Polk County to 125 feet below NGVD in Nassau County. Water levels were at record lows in many counties due to lack of rainfall. Declines were as much as 10 feet and commonly 5 feet from the May 1980 levels. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 41492 |
| Citation Author: | Schiner, George R.; Hayes, Eugene C. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | 1 map ;102 x 62 cm. |
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| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 81-1052 |
| Citation Search Results Text: | Potentiometric surface of the Floridan Aquifer, St. Johns River Water Management District and vicinity, Florida, May 1981; 1981; OFR; 81-1052; Schiner, George R.; Hayes, Eugene C. |
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| Citation Year: | 1981 |
| Type: | citation/reference |
| Text: | Potentiometric surface of the Floridan Aquifer, St. Johns River Water Management District and vicinity, Florida, May 1981; 1981; OFR; 81-1052; Schiner, George R.; Hayes, Eugene C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (PLATE): | http://pubs.usgs.gov/of/1981/1052/plate-1.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
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