Description: A Wellhead Protection Area (WHPA) is the surface and subsurface area, delineated by fixed radius, hydrogeologic/geomorphic mapping, analytical, semi-analytical or numerical flow/solute transport methods, which contributes water to a PWSS well and through which contaminants are likely to move through and reach the well over a specified period of time. The delineation of the WHPA is based on the physical processes governing ground water flow. The Indiana WHPA delineation is based on time of travel (TOT) criteria or distance criteria. The TOT is the distance traveled by a drop of water through an aquifer to the well or well field for a specified period of time. The TOT for calculating the WHPA is determined by the PWSS, with a minimum five year TOT allowed. The WHPA size and shape will vary, depending on hydrogeological features, including ground water divides, surface water features, hydraulic gradient, and specified TOT.
Service Item Id: 127c3a5c7378440d93cdb1715e5e8dd1
Copyright Text: Indiana Department of Environmental Management (IDEM) - Office of Water Quality - Drinking Water Branch - Ground Water Section
Description: A Wellhead Protection Area (WHPA) is the surface and subsurface area, delineated by fixed radius, hydrogeologic/geomorphic mapping, analytical, semi-analytical or numerical flow/solute transport methods, which contributes water to a PWSS well and through which contaminants are likely to move through and reach the well over a specified period of time. The delineation of the WHPA is based on the physical processes governing ground water flow. The Indiana WHPA delineation is based on time of travel (TOT) criteria or distance criteria. The TOT is the distance traveled by a drop of water through an aquifer to the well or well field for a specified period of time. The TOT for calculating the WHPA is determined by the PWSS, with a minimum five year TOT allowed. The WHPA size and shape will vary, depending on hydrogeological features, including ground water divides, surface water features, hydraulic gradient, and specified TOT.
Service Item Id: 127c3a5c7378440d93cdb1715e5e8dd1
Copyright Text: Indiana Department of Environmental Management (IDEM) - Office of Water Quality - Drinking Water Branch - Ground Water Section
Description: Census_County_TIGER00_IN contains locations for all Indiana counties and contains census data for each county. Data is from U.S. Department of Commerce, U.S. Census Bureau, Census 2000 SF1 tables.
Service Item Id: 127c3a5c7378440d93cdb1715e5e8dd1
Copyright Text: Indiana Statewide GIS database was produced under an Indiana Department of Transportation contract. Data is from U.S. Department of Commerce, U.S. Census Bureau, Census 2000 Tiger Line Files and SF1 tables. Polygons were obtained from a county boundary shapefile produced by the Indiana Geological Survey. US Census Bureau requests "Acknowledgment of the U.S. Census Bureau would be appreciated for products derived from these files." Indiana Geological Survey requests "Indiana Geological Survey be cited in any products generated from this data. The following source citation should be included: [LANDSURVEY_COUNTY_POLY_IN: County Boundaries of Indiana (Indiana Geological Survey, 1:24,000, Polygon Shapefile)]."