| Abstract: | INTRODUCTION
This map depicts the potentiometric surface of the Upper Floridan aquifer in the St. Johns River Water Management District and vicinity in May 2001. Potentiometric contours are based on water-level measurements collected at 684 wells during the period May 2 - 30, near the end of the dry season. The shapes of some contours have been inferred from previous potentiometric-surface maps with larger well networks. The potentiometric surface of the carbonate Upper Floridan aquifer responds mainly to rainfall, and more locally, to ground-water withdrawals. Potentiometric-surface highs generally correspond to topographic highs where the aquifer is recharged. Springs and areas of diffuse upward leakage naturally discharge water from the aquifer and are most prevalent along the St. Johns River. Areas of discharge are reflected by depressions in the potentiometric surface. Ground-water withdrawals locally have lowered the potentiometric surface. Ground water in the Upper Floridan aquifer generally flows from potentiometric highs to potentiometric lows in a direction perpendicular to the contours. |
| Genre: | USGS Numbered Series |
| ProdID: | 70041 |
| Citation Author: | Kinnaman, Sandra L.; Knowles, Leel, Jr. |
| Citation Contributing Office: | Geological Survey (U.S.) |
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| Citation Edition: | - |
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| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | 0313000 |
| Citation LatS: | 0263000 |
| Citation LonE: | -0800000 |
| Citation LonW: | -0830000 |
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| Citation Online Only Flag: | |
| Citation Phsyical Description: | 1 Sheet: 36 x 52 inches |
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| Citation Public Comments: | Prepared in cooperation with the St. Johns River Water Management District, South Florida Water Management District, and Southwest Florida Water Management District |
| Citation Publisher: | Geological Survey (U.S.) |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 2004-1377 |
| Citation Search Results Text: | Potentiometric Surface of the Upper Floridan Aquifer in the St. Johns River Water Management District and Vicinity, Florida, May, 2004; 2004; OFR; 2004-1377; Kinnaman, Sandra L.; Knowles, Leel, Jr. |
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| Citation Year: | 2004 |
| Type: | citation/reference |
| Text: | Potentiometric Surface of the Upper Floridan Aquifer in the St. Johns River Water Management District and Vicinity, Florida, May, 2004; 2004; OFR; 2004-1377; Kinnaman, Sandra L.; Knowles, Leel, Jr. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/of/2004/1377/ |
| Date Other: | Thu, 11 Nov 2004 00:00 -0600 |
| Publisher: | Geological Survey (U.S.) |
