| Abstract: | A qualitative evaluation of the potential for downward leakage from the surficial sand aquifer to the underlying Floridan aquifer was made for the Green Swamp area (about 870 sq mi) in central Florida. Downward leakage, or recharge, is limited under natural conditions owing to the nearness to land surface of the potentiometric surface of both the sand aquifer and the underlying Floridan aquifer. Continuous cores of the unconsolidated section were obtained at 74 sites in the study area and were evaluated for downward leakage potential based on grain-size distribution. Sand percentage was estimated for each interval or bed from microscopic examination of the core samples. The four maps prepared from this data show sand thickness, clay thickness, relative vertical hydraulic conductivity of the confining beds and the relative potential for downward leakage. About 20 percent (178 sq mi) of the area classified has a relatively good potential for downward leakage; almost 50 percent of the area has a relatively poor potential. (Woodard-USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 27444 |
| Citation Author: | Grubb, H. F. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | - |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | 5 maps and 1 cross section ;on sheet 71 x 96 cm. fold. to 28 x 21 cm. in envelope 31 x 23 cm. -- |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | U.S. Geological Survey in cooperation with the Southwest Florida Water Management District, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 77-71 |
| Citation Search Results Text: | Potential for downward leakage to the Floridan Aquifer, Green Swamp area, central Florida; 1977; WRI; 77-71; Grubb, H. F. |
| Citation Start Page: | |
| Citation Volume: | |
| Citation Year: | 1977 |
| Type: | citation/reference |
| Text: | Potential for downward leakage to the Floridan Aquifer, Green Swamp area, central Florida; 1977; WRI; 77-71; Grubb, H. F. |
| 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 in cooperation with the Southwest Florida Water Management District, |
