SJRWMD_sjrechsp

20120717 12294500 FALSE GROUNDWATER_RECHARGE_AREA 002 2552484.730427 2746491.910654 159380.482606 349248.202607 1 Projected GCS_North_American_1983 Linear Unit: Foot_US (0.304801) NAD_1983_StatePlane_Florida_North_FIPS_0903_Feet <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.1.0'><WKT>PROJCS["NAD_1983_StatePlane_Florida_North_FIPS_0903_Feet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",1968500.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-84.5],PARAMETER["Standard_Parallel_1",29.58333333333333],PARAMETER["Standard_Parallel_2",30.75],PARAMETER["Latitude_Of_Origin",29.0],UNIT["Foot_US",0.3048006096012192],AUTHORITY["EPSG",2238]]</WKT><XOrigin>-125939000</XOrigin><YOrigin>-91453300</YOrigin><XYScale>3048.0060960121928</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.0032808333333333331</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102660</WKID><LatestWKID>2238</LatestWKID></ProjectedCoordinateSystem> 20230427 12275500 20230427 12285100 1.0 ItemDescription 150000000 5000 ESRI ArcCatalog 9.3.1.1850 en REQUIRED: A brief narrative summary of the data set. REQUIRED: A summary of the intentions with which the data set was developed. REQUIRED: The name of an organization or individual that developed the data set. REQUIRED: The date when the data set is published or otherwise made available for release. SJRWMD_sjrechsp SJRWMD_sjrechsp vector digital data withheld REQUIRED: The basis on which the time period of content information is determined. REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground. REQUIRED: The state of the data set. REQUIRED: The frequency with which changes and additions are made to the data set after the initial data set is completed. -82.665645 -82.043566 29.947355 29.415322 2552484.730550 2746491.910550 159380.482679 349248.202679 REQUIRED: Reference to a formally registered thesaurus or a similar authoritative source of theme keywords. REQUIRED: Common-use word or phrase used to describe the subject of the data set. REQUIRED: Restrictions and legal prerequisites for accessing the data set. REQUIRED: Restrictions and legal prerequisites for using the data set after access is granted. Personal GeoDatabase Feature Class Esri ArcGIS 13.1.0.41833 GROUNDWATER_RECHARGE_AREA 2552484.73055 2746491.91055 349248.202679 159380.482679 1 -82.665645 -82.043566 29.947355 29.415322 1 Maps of groundwater recharge areas are useful planning tools for groundwater resource management. Groundwater recharge to the Floridan aquifer, as presented in this map, is the addition of water to the Floridan aquifer from the overlying surficial aquifer or more directly from rainfall in areas where the surficial aquifer is thin or absent and the limestones of the Floridan aquifer are at or near land surface. The amount of water available as recharge to the Floridan aquifer is that part of rainfall, after losses to runoff and evapotranspiration, which infiltrates through the soil zone to the water table and continues to move downward to underlying aquifer systems. In addition, significant local recharge may occur where sinkholes have breached the upper confining unit. <DIV STYLE="text-align:Left;"><DIV><DIV>Maps of groundwater recharge areas are useful planning tools for groundwater resource management. Sections 373.0391, 373.0395, and 373.0397, Florida Statutes, require the water management districts to provide recharge area information to local governments and planning agencies. Recharge areas of the Floridan aquifer in the St. Johns River Water Management District (SJRWMD) were mapped using a geographic information system to analyze the geologic and hydrologic factors that affect recharge.The hydrogeologic characteristics of the surficial aquifer system, the intermediate aquifer system and confining unit, and the Floridan aquifer system determine areas and rates of recharge to the Floridan aquifer in SJRWMD. The surficial aquifer system extends from the land surface downward to the top of the intermediate confining unit separating the surficial and Floridan aquifer systems. The water table of the surficial aquifer is the upper surface of the zone of saturation. The intermediate confining unit, where present, retards the movement of water between the surficial and Floridan aquifers and confines the Floridan aquifer under artesian conditions. The water level in a well tapping the Floridan aquifer is called the potentiometric level, and this water level can be higher, lower, or at the same elevation as the water table. Leakance of water through the confining unit is dependent on its thickness and hydraulic conductivity. Recharge to the Floridan aquifer occurs in areas where the water table elevation is higher than the Upper Floridan potentiometric elevation, creating downward hydraulic pressure to move water through the confining unit. In areas where the Upper Floridan potentiometric surface is at a higher elevation than the water table, leakance is upward from the Floridan to the surficial aquifer. The areas of upward leakance define the discharge areas of the Floridan aquifer. Where Floridan potentiometric elevations are above the land surface, springs and free-flowing artesian wells occur. Recharge rates to the Floridan aquifer were calculated based on an analysis of the hydraulic pressure differences between the surficial aquifer water table and the Floridan potentiometric surface, and on the leakance of water through the confining unit separating the aquifers. Recharge also occurs directly from infiltrating rainfall where the limestones of the Floridan aquifer are at or near land surface. Significant recharge may also occur where the confining unit is breached by sinkholes and sinkhole-related features, depending on the hydrogeologic relationships between the surficial and Floridan aquifers. Recharge rates were mapped at a 4 inch/year contour interval. The following mathematical operations were performed to determine confining unit leakance, hydraulic pressure differences between the surficial and Floridan aquifers, and recharge to the Floridan aquifer: Hydraulic pressure difference = water table elevation minus Floridan potentiometric surface elevation Leakance = vertical hydraulic conductivity of confining unit divided by thickness of confining unit Recharge = hydraulic pressure difference multiplied by leakance The input raw data used for the hydraulic pressure difference map (water table elevation minus Floridan potentiometric elevation) and the confining unit thickness map (confining unit elevation minus Floridan aquifer system elevation) were compiled from SJRWMD databases. While a large number of data points were available for these data layers, the data are concentrated in some areas and sparse in other areas. Geostatistical methods using the ISATIS software program were used to analyze the spatial characteristics of the data to produce the best estimation of each data layer throughout SJRWMD. Grid outputs (115 meter x 115 meter) for each layer were exported to ArcMap to perform the mathematical operations described above. Heterogeneity in confining unit properties and lack of vertical hydraulic conductivity data from cores made it impractical to estimate conductivity using geostatistics. As a result, sensitivity analysis on available conductivity data was used to determine the conductivity value and leakance range that most closely approximated leakance values derived from groundwater flow model calibrations. This December 2004 Floridan aquifer recharge map updates the map published in Technical Publication SJ93-5, "Recharge Areas of the Floridan Aquifer in the St. Johns River Water Management District." The recharge map provides a regional assessment of recharge to the Floridan aquifer. The map is intended to be used as a regional planning aid for groundwater resource management. The map is not intended for site-specific assessments.</DIV></DIV></DIV> SJRWMD 2005. 1 -82.665645 -82.043566 29.947355 29.415322 Alachua County; Groundwater Recharge Area; SJRWMD en FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time REQUIRED: The person responsible for the metadata information. REQUIRED: The organization responsible for the metadata information. REQUIRED: The mailing and/or physical address for the organization or individual. REQUIRED: The city of the address. REQUIRED: The state or province of the address. REQUIRED: The ZIP or other postal code of the address. REQUIRED: The telephone number by which individuals can speak to the organization or individual. 20090217 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset Downloadable Data 002 withheld Local Area Network Personal GeoDatabase Feature Class Enterprise Geodatabase Feature Class Vector Simple FALSE 0 TRUE FALSE GCS_North_American_1983 NAD_1983_StatePlane_Florida_North_FIPS_0903_Feet coordinate pair survey feet 0.010000 0.010000 North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Explicit elevation coordinate included with horizontal coordinates 0.010000 NAD_1983_StatePlane_Florida_North_FIPS_0903_Feet EPSG 5.3(9.0.0) 0 GROUNDWATER_RECHARGE_AREA Feature Class 0 OBJECTID OBJECTID OID 4 10 0 Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. epdgis.EPD_GIS.GROUNDWATER_RECHARGE_AREA.AREA epdgis.EPD_GIS.GROUNDWATER_RECHARGE_AREA.AREA Double 8 38 8 Shape Shape Geometry 8 0 0 Feature geometry. ESRI Coordinates defining the features. AREA AREA Double 8 0 0 PERIMETER PERIMETER Double 8 38 8 TEST_ TEST_ Double 8 38 8 TEST_ID TEST_ID Double 8 38 8 SYMBOL SYMBOL SmallInteger 2 5 0 RECHARGE RECHARGE String 10 0 0 ACRES ACRES Double 8 38 8 Shape.STArea() Shape.STArea() Double 0 0 0 Shape.STLength() Shape.STLength() Double 0 0 0 HECTARES HECTARES Double 8 38 8 20230427