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Automated source water assessment area delineation for public supply wells in the Treasure Valley, southwestern Idaho.

June 9, 2026

This data release contains the TVSWA_Delineator tool, and the associated groundwater-flow and particle-tracking model files used to define source water assessment areas for public water supply wells in the Treasure Valley. It includes a Python-based executable utilizing the FloPy package, specialized MODPATH 7 particle-tracking configurations, and a modified version of the MODFLOW 6 Treasure Valley Groundwater Flow Model. The tool utilizes quadtree local grid refinement and backward particle tracking to define 3-, 6-, and 10-year source water assessment areas. This data release provides both the source code and the final output files including pathline maps and a geographic information system shapefile for the public-water supply welli. The README file describes all the files and directories in the data release and provides instructions for running the tool.

Publication Year 2026
Title Automated source water assessment area delineation for public supply wells in the Treasure Valley, southwestern Idaho.
DOI 10.5066/P13FOFSZ
Authors Paul M Thomas, Kenneth D Skinner, Stephen A Hundt
Product Type Data Release
Record Source USGS Asset Identifier Service (AIS)
USGS Organization Idaho Water Science Center
Rights This work is marked with CC0 1.0 Universal
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