Northern Portion of the Carrizo-Wilcox AquiferGroundwater 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 will be released in late 2019.

In 2002, the TWDB contracted with Intera, Inc. (who teamed with Parsons Engineering Science, Inc., Waterstone Environmental Hydrology and Engineering, Inc., and several individual experts) to develop a model of the northern portion of the Carrizo-Wilcox Aquifer in Texas. A final report and model were delivered in 2003.

The current groundwater availability model, which includes the Carrizo-Wilcox Aquifer can be accessed at Carrizo-Wilcox, Queen City, Sparta Aquifers Groundwater Availability Model. However, model users interested in details about the development of the Carrizo-Wilcox Aquifer Groundwater Availability Model should still refer to the groundwater availability model report (Version 1) listed below.

Northern portion of the Carrizo-Wilcox Aquifer GAM Update

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

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Northern portion of the Carrizo-Wilcox Aquifer GAM Version 1

Model Files

The Carrizo-Wilcox Aquifer Groundwater Availability Models (all three portions) have been incorporated into the Carrizo-Wilcox, Queen City, Sparta Aquifers Groundwater Availiability Models. See the Carrizo-Wilcox, Queen City, Sparta Aquifers Groundwater Availability Models page for model files.

Model Grid

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.

See the Carrizo-Wilcox, Queen City, Sparta Aquifers Groundwater Availability Models page for the model grid.

Aquifer Data

The Carrizo-Wilcox Aquifer Groundwater Availability Models (all three portions) have been incorporated into the Carrizo-Wilcox, Queen City, Sparta Aquifers Groundwater Availability Models. See the Carrizo-Wilcox, Queen City, Sparta Aquifers Groundwater Availability Models page for aquifer data.

Stakeholder Advisory Forums (SAF)

ID Date Location
SAF 8 1/14/2003 Austin, Texas
SAF 7 10/29/2002 Nacogdoches, Texas - City of Nacogdoches Parks and Recreation Center, Martial Arts Room (1112 North Street)
SAF 6 8/1/2002 Hughes Springs, Texas - Northeast Texas Municipal Water District (NETMWD)
SAF 5 5/21/2002 Diboll, Texas - Temple-Inland Corporate Office (303 South Temple Drive)
SAF 4 2/28/2002 Hughes Springs, Texas - Northeast Texas Municipal Water District (NETMWD)
SAF 3 11/19/2001 Diboll, Texas - Temple-Inland Corporate Office (303 South Temple Drive)
SAF 2 8/1/2001 Holly Lake Ranch (located on FM 2869 between FMs 14 and 49), Wood County
SAF 1 5/9/2001 Nacogdoches, Texas - Stephen F. Austin State University

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.

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