Northern Portion of the Carrizo-Wilcox Aquifer Groundwater Availability Model (GAM)

This map shows the extent and location of the northern portion of the Carrizo-Wilcox Aquifer 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 were released in April 2021.

Current GAM

Numerical Model Report

Conceptual Model Report

Conceptual Model Report: Groundwater Availability Model for Northern Portion of the Queen City, Sparta, and Carrizo-Wilcox Aquifers.

Model Files and Associated Data

Please see the GAM files download page for a copy of the model files for the Groundwater Availability Model.

Stakeholder Advisory Forums (SAF)

Send us an email if you would like to receive SAF notifications.

ID Date Location
SAF 1 5/9/2017 Nacogdoches, Texas
SAF 2 8/9/2018 Nacogdoches, Texas
SAF 3 8/27/2020 Online meeting

Other Resources

Please see the Carrizo-Wilcox, Sparta, and Queen City aquifer pages for other reports and publications.

For model runs see the GMA 11 page.