| Abstract: | Two core holes were drilled to depths of 906 and 1,996 feet, respectively, within the Tertiary limestone (Floridan) aquifers, at Polk City, central Florida. Data from the two holes revealed that the bottom of the zone of vigorous groundwater circulation is confined by carbonate rocks at a depth of about 1,000 feet (863 feet below sea level). The zone of circulation is divided into two high-permeability zones. The dissolved solids of the water within the high-permeability zones is approximately 150 milligrams per liter. Within the carbonate rocks, the dissolved solids content of the water reaches about 2,000 milligrams per liter at the bottom of the core hole. Water levels in the core holes declined a total of about 16 feet as the hole was drilled; most of the head loss occurred at depths below 1,800 feet. The porosities of selected cores ranged from 1.6 to 45.3 percent; the hydraulic conductivities ranged from less than 0.000024 to 19.0786 feet per day in the horizontal direction and from less than 0.000024 to 2.99 feet per day in the vertical direction; and the ratio of vertical to horizontal permeability ranged from 0.03 to 1.98. Due to drilling problems, packer tests and geophysical logging could not be accomplished. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 28848 |
| Citation Author: | Navoy, A. S. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | iv, 89 p. :ill., maps ;28 cm. |
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| Citation Publisher: | U.S. Geological Survey, WRD, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 84-4257 |
| Citation Search Results Text: | Hydrogeologic data from a 2,000-foot deep core hole at Polk City, Green Swamp area, central Florida; 1986; WRI; 84-4257; Navoy, A. S. |
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| Citation Year: | 1986 |
| Type: | citation/reference |
| Text: | Hydrogeologic data from a 2,000-foot deep core hole at Polk City, Green Swamp area, central Florida; 1986; WRI; 84-4257; Navoy, A. S. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/wri/1984/4257/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/wri/1984/4257/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, WRD, |
