Northern Portion of the Carrizo-Wilcox AquiferGroundwater Availability Model (GAM)
In 2017, the Texas Water Development Board (TWDB) contracted with GSI Environmental, Inc. to update the groundwater availability model of the northern part of the Carrizo-Wilcox, Queen City, and Sparta aquifers in Texas. A final report and model will be released in early 2021.
Draft Numerical Model Report
Draft Final Conceptual Model Report
Stakeholder Advisory Forums (SAF)
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|SAF 1||5/9/2017||Nacogdoches, Texas||SAF 2||8/9/2018||Nacogdoches, Texas||SAF 3||8/27/2020||Online meeting|
Model Report (2004, v. 2.01)
Model Files (2004, v. 2.01)
Please see the GAM files download page for a copy of the model files.
Model grid cells are geographically assigned to counties, groundwater conservation districts, river basins, groundwater management areas, and regional water planning areas within the model study area using a centroid based approach. The model grid is available in ESRI® shapefile format and comma-delimited text file.
Aquifer data is only available as a package for the entire model area and requires GIS software for processing. Please see the GAM files download page for aquifer data.
Model Report (2003)
We are listing the 2003 report above as a resource on the conceptual analysis and data for the Carrizo-Wilcox Aquifer, an aspect that was not addressed by the 2004 GAM report.