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MAINE BEDROCK SOURCE WATER PROTECTION AREAS
Description:
Bedrocksqpa_region_pws is a REGIONS SDE layer of bedrock source water protection areas in Maine with a high, moderate, or low probability of contributing water to community public water supplies. The Maine Drinking Water Program (MEDWP), in cooperation with the Maine Geological Survey (MGS) has conducted probabilistic digital modeling of the contributing areas to selected bedrock community public water supplies. The models were run using the U.S. Geological Survey finite-difference ground-water flow model MODFLOW and the particle tracking package MODPATH. Available geologic and pump test data formed the primary inputs to the models. A set of structured sensitivity analyses produced a probability plot of capture zones. Each model set was generalized into "high" "moderate" and "low" probability zones of contribution to the well(s). These data were developed with financial support from U.S. Environmental Protection Agency (USEPA). Additional information on MODFLOW and MODPATH and water resource modeling techniques is available at http://water.usgs.gov/nrp/gwsoftware/modflow.html and http://water.usgs.gov/pubs/twri/twri6a1/ .
