Quantitative Assessment of the Impact of Residential Rural Development on Groundwater Recharge and Pollution Potential
Protection of the local groundwater environment within agricultural areas requires quantitative assessment of the impact that residential rural development has on local groundwater recharge and pollution potential. A public groundwater supply well in Southern Leavenworth County, Kansas is located in an agricultural area with increasing development. Pollution potential calculations utilized DRASTIC (Depth to water, net Recharge, Aquifer media, Soil media, Topography, Impact of the vadose zone and hydraulic Conductivity). Groundwater recharge rate calculations used WetSpass (Water and Energy Transfer between Soil, Plants, and Atmosphere under quasi-Steady State). Findings included a strong correlation (r=0.74) between the percent of increase in pollution potential and the percent of increase in recharge rates. The highest increase in overall pollution potential (8.63%) occurred within 100 meters of the groundwater well. These findings have significance with regard to improved management of land within areas of rural development.
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3D Analyst Tools agricultural cropland Analyst Tools toolbox Aquifer media ArcView 9.2 Batelaan and Woldeamlak change in land climate data confidence level contamination correlation David Rinaldi Figure Depth to Water development occurred Dijle DRASTIC Index DRASTIC method DRASTIC Rating Table Equation evaluate grassland groundwater environment groundwater recharge rates hydraulic conductivity hydrologic Hydrologic Cycle increase in groundwater increase in recharge Input Rasters Kansas land cover change land use change land-use Leavenworth County located Mean DRASTIC Rating Mean Recharge Rate meters mm/yr MODFLOW parameters percent of change percent of increase percent of land Post-Development potential evapotranspiration precipitation raster input maps Raster Reclass toolbox rates after development rates and pollution rating and percent rating before development Rating with Distance Ratings and Recharge Reclassify tool residential rural development Result Rasters Runoff slope Smedt soil media spatial resolution study area Surface Runoff Table 16 Table information Topography University of Utah vadose zone water balance