High Plains Aquifer SystemGroundwater Availability Model (GAM)

In July 2012, the Texas Water Development Board (TWDB) contracted with INTERA, Inc. to develop a groundwater availability model (GAM) for the High Plains Aquifer System (Ogallala Aquifer, Dockum Aquifer, Edwards-Trinity (High Plains) Aquifer, and Rita Blanca Aquifer). The project was completed and delivered in 2015.

Model Reports

"Conceptual Model for the High Plains Aquifer System Groundwater Availability Model."

"Numerical Model for the High Plains Aquifer System Groundwater Availability Model."

Model Files

Please contact David Thorkildsen (512-936-0871) for a copy of the 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.

Download model grid.

Aquifer Data

Aquifer data is only available as a package for the entire model area and requires GIS software for processing. Due to the size of raw/source data files for this model, this information has not been posted on the web. To request the raw/source data, contact David Thorkildsen (512-936-0871).

Stakeholder Advisory Forums (SAF)

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

Other Resources

Please see the Ogallala, Dockum, Edwards-Trinity (High Plains), and Rita Blanca aquifer pages for other reports and publications.

For model runs see the GMA 1, GMA 2, GMA 3, GMA 6, and GMA 7 pages.