Extent of gray limestone aquifer (interpreted to be unconfined), southwestern Florida, USGS WRIR 99-4213, figure 29Entry ID: USGS_SOFIA_glime_ext_aq_polygon
Abstract: Leakance, which is the vertical hydraulic conductivity of the confining unit divided by its thickness, can be used to provide an indication of the degree of confinement of the aquifer. For purposes of this discussion, an aquifer is considered to be well confined, or have 'good confinement', if leakance was less than 1.0 x 10-3 1/d. Sites where leakance was determined by aquifer testing to be less ... than 1.0 x 10-3 1/d or the behavior of the aquifer was described as confined or well confined (tables 8 and 9) are shown in figure 29. These sites are located in southern Hendry County, western Broward County, and central Miami-Dade County and are in areas where the thickness of the confining unit approaches or is more than 50 ft. However, confining bed thickness did not necessarily prove to be a determinant of confinement. The map shows the extent of the gray limestone aquifer in southwestern Florida. Results from 35 new test coreholes and aquifer-test, water-level, and water quality data were combined with existing hydrogeologic data to define the extent, thickness, hydraulic properties, and degree of confinement of the gray limestone aquifer in Southern Florida. The western boundary is not mapped and is set to the western boundary of the study area.
The purpose of this report is to evaluate the hydrogeologic framework, hydraulic properties, and ground-water flow of the gray limestone aquifer in southern Florida. The report also emphasizes the geologic framework (stratigraphy and structure) and the hydrogeologic framework (aquifers and confining and semiconfining units) above and below the gray limestone aquifer.
Data Set Citation
Dataset Originator/Creator: Roy Sonenshein
Dataset Title: Extent of gray limestone aquifer (interpreted to be unconfined), southwestern Florida, USGS WRIR 99-4213, figure 29
Dataset Release Date: 2001
Data Presentation Form: vector digital dataOnline Resource: http://sofia.usgs.gov/exchange/gis/data/glime_ext_aq_polygon.htm
Start Date: 1964-01-01Stop Date: 1999-03-31
Quality The data set was checked for topological consistency using the Arc/INFO command BUILD and CLEAN. No other checks for logical consistency were performed on this data set.
Access Constraints None
Use Constraints None. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made by the U.S. Geological Survey regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. No responsibility is assumed by the U.S. Geological Survey in the use of these data. These data are not constituted legal documents and are not intended to be used as such.
Data Set Progress
Distribution Size: 0.012
Distribution Format: zipped files
Role: TECHNICAL CONTACT
Email: sunshine at usgs.gov
USGS 9100 NW 36th Street, Suite 107
Province or State: FL
Postal Code: 33178
Role: DIF AUTHOR
Email: alicia.m.aleman at nasa.gov
Goddard Space Flight Center Code 610.2
Province or State: MD
Postal Code: 20771
Creation and Review Dates
DIF Creation Date: 2006-07-11
Last DIF Revision Date: 2009-06-02