GAM Downloads
View All Models Download Other Project Files
Most of the model and data files linked on this page are very large (up to 25 gigabytes when uncompressed), and may take a long time to download.
Your requested data may often be compressed into 7-Zip format for efficient downloading. The TWDB uses 7-Zip 21.07 to compress data files and should be compatible with most zip file format utility software. You may also use Google to search for other free alternative zip file format utility software. Please note that any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the TWDB nor the State of Texas.
General Use Disclaimer:
Although the data have been subjected to standard TWDB review protocols and are substantially complete, the TWDB reserves the right to revise the data pursuant to further analysis and review. All groundwater availability modeling data were developed for regional scale use only, and should not be used for local scale or individual site locations. Furthermore, the data are released on condition that neither the TWDB nor the State of Texas shall be held liable for any damages resulting from their authorized or unauthorized use.
GIS Users:
Many of our GAM databases contain features that are not compatible with ArcGIS Pro. We are currently in the process of converting these databases and will update the website accordingly. In the meantime, please contact us if you require ArcGIS Pro-compatible files so that we can prioritize the conversion of those datasets.
| Model | Model File | Geodatabase | Model Grid | Report | Other Data | |
|---|---|---|---|---|---|---|
| Brazos River Alluvium Aquifer GAM | Model (63MB zipped, 354MB unzipped) | Geodatabase (4.1GB zipped, 4.7GB unzipped) | Model grid (last updated: 10/12/2023; 10.9MB zipped, 76.5MB unzipped) | |||
| Blossom Aquifer GAM | Model (23MB zipped, 345MB unzipped) | Geodatabase (132MB zipped, 185MB unzipped) | Model grid (last updated: 10/12/2023; 1.7MB zipped, 10.5MB unzipped) | N/A | N/A | |
| Bone Spring-Victorio Peak Aquifer GAM | Model (61.6MB zipped, 350MB unzipped) | N/A | Model grid (last updated: 10/12/2023; 5.0MB zipped, 20.2MB unzipped) | Report | N/A | |
| Capitan Reef Complex Aquifer GAM | Model (1.1GB zipped, 3.9GB unzipped) | Geodatabase (876MB zipped, 1.2GB unzipped) | Model grid (last updated: 10/12/2023; 11.2MB zipped, 71.5MB unzipped) | Structure | ||
| Carrizo-Wilcox Aquifer (central portion) GAM (version 3.02) | Model (last updated 09/28/2020: 712MB zipped, 3.16GB unzipped) | Geodatabase (last updated: 10/07/2020; 2.34GB zipped, 2.70GB unzipped) | Model grid (last updated: 10/12/2023; 34.7MB zipped, 165.0MB unzipped) | N/A | ||
| Carrizo-Wilcox Aquifer (northern portion) GAM (version 3.01) | Model (178MB zipped, 7.6GB unzipped) | Geodatabases (1.9GB zipped, 9.4GB unzipped) | Model grid (last updated: 10/12/2023; 51.2MB zipped, 282MB unzipped) | Leapfrog Files | ||
| Carrizo-Wilcox Aquifer (southern portion) GAM (version 3.01) | Model (624MB zipped, 4.25GB unzipped) | Geodatabase (14GB zipped, 15.1GB unzipped) | Model grid (last updated: 10/12/2023; 31.6MB zipped, 193MB unzipped) | N/A | ||
| Edwards (BFZ) Aquifer (Barton Springs Segment) GAM | Model and source data (14.7MB zipped, 1.1GB unzipped) | N/A | Model grid (last updated: 10/12/2023; 1.2MB zipped, 8.3MB unzipped) | Report | N/A | |
| Edwards (BFZ) Aquifer (Northern Segment) GAM | Model (103MB zipped, 2.40GB unzipped) | Geodatabase (693MB zipped, 1.93GB unzipped) | Model grid (last updated: 12/19/2023; 12.7MB zipped, 62.1MB unzipped) | Report | N/A | |
| Edwards (BFZ) Aquifer (San Antonio Segment) GAM | Model (0.7MB zipped, 13.6MB unzipped) | N/A | Model grid (last updated: 10/12/2023; 21.3MB zipped, 131.0MB unzipped) | N/A | ||
| Edwards-Trinity (Plateau) and Pecos Valley aquifers GAM | Model (152MB zipped, 4.6GB unzipped) | Geodatabase (141MB zipped, 403MB unzipped) | Model grid (last updated: 10/12/2023; 11.9MB zipped, 62.2MB unzipped) | Report | N/A | |
| GMA 16 groundwater flow model | Model (17MB zipped, 209MB unzipped) | Geodatabase (2.3GB zipped, 7.6GB unzipped) | Model grid (last updated: 09/20/2023; 4.7MB zipped, 32.9MB unzipped) | GMA 16 Report | N/A | |
| Gulf Coast Aquifer System (central and southern portions) GAM | Model (1.2GB zipped, 4.3GB unzipped) | Geodatabase (263MB zipped, 819MB unzipped) | Model grid (last updated: 10/12/2023; 76.7MB zipped, 468.0MB unzipped) | N/A | ||
| Gulf Coast Aquifer System (northern portion) GAM |
|
Geodatabase (218MB zipped, 580MB unzipped) | Model grid (last updated: 5/16/2023; 11.3MB zipped, 66.3MB unzipped) |
|
N/A | |
| Cross Timbers Aquifer GAM | N/A | Geodatabase (size: 1.8GB zipped) | N/A | Conceptual Report | Leapfrog Geo Model | |
| High Plains Aquifer System GAM | Model (1.8GB zipped, 12.5GB unzipped) | Geodatabase (8GB zipped, 25.2GB unzipped) | Model grid (last updated: 10/12/2023; 26.7MB zipped, 487.0MB unzipped) | N/A | ||
| Hueco Bolsons Aquifer GAM | Model (125MB zipped, 918MB unzipped) | N/A | N/A | N/A | ||
| Mesilla Bolsons Aquifer GAM | Model (3.5MB zipped, 12.5GB unzipped) | N/A | N/A | N/A | ||
| Igneous and West Texas Bolsons (Wild Horse Flat, Michigan Flat, Ryan Flat, and Lobo Flat) aquifers GAM | Model (94MB zipped, 2.8GB unzipped) | Geodatabase (363MB zipped, 4.1GB unzipped) | Model grid (last updated: 10/12/2023; 3.94MB zipped, 24.6MB unzipped) | N/A | ||
| Kinney County model | Model (15MB zipped, 880MB unzipped) | N/A | N/A | Report | N/A | |
| Lipan Aquifer GAM | Model (92MB zipped, 880MB unzipped) | Geodatabase (337MB zipped, 2.8GB unzipped) | Model grid (last updated: 10/12/2023; 0.5MB zipped, 5.8MB unzipped) | N/A | ||
| Llano Uplift Aquifer System GAM | Model (1.8GB zipped, 6GB unzipped) | Geodatabase (814MB zipped, 1.5GB unzipped) | Model grid (last updated: 10/12/2023; 30.0MB zipped, 194.0MB unzipped) | Structure and Stratigraphy | ||
| Lower Rio Grande Valley transport model | Model (5GB zipped, 26.3GB unzipped) | Geodatabase (2.9GB zipped, 3.1GB unzipped) | N/A | Predictive Model | ||
| Nacatoch Aquifer GAM | Model (76MB zipped, 3.3GB unzipped) | Geodatabase (502MB zipped, 9.7GB unzipped) | Model grid (last updated: 10/12/2023; 1.5MB zipped, 155.0MB unzipped) | Report | N/A | |
| Rustler Aquifer GAM | Model (17MB zipped, 1.3GB unzipped) | Geodatabase (503MB zipped, 4.4GB unzipped) | Model grid (last updated: 10/12/2023; 9.5MB zipped, 98.9MB unzipped) | Report | N/A | |
| Seymour and Blaine Aquifers GAM | Model (459MB zipped, 16.3GB unzipped) | Geodatabase (701MB zipped, 17.9GB unzipped) | Model grid (last updated: 10/12/2023; 1.6MB zipped, 16.1MB unzipped) | Report | N/A | |
| Seymour Aquifer in Haskell, Knox, and Baylor counties GAM | Model (23MB zipped, 1.4GB unzipped) | Geodatabase (183MB zipped, 1.81GB unzipped) | Model grid (last updated: 10/12/2023; 9.8MB zipped, 51.0MB unzipped) | N/A | ||
| Trinity Aquifer (Hill Country) GAM | Model (17MB zipped, 143B unzipped) | Geodatabase (120MB zipped, 867MB unzipped) | Model grid (last updated: 10/12/2023; 0.4MB zipped, 4.8MB unzipped) | Report | SwRI Conceptual Model | |
| Trinity (northern portion) and Woodbine Aquifers GAM | Model (692MB zipped, 726MB unzipped) | Data and model (4.8GB zipped, 7.1GB unzipped) | Model grid (last updated: 10/12/2023; 95.3MB zipped, 762.0MB unzipped) | Report | Appendix Log and Aquifer Data | |
| West Texas Bolsons (Red Light, Green River, and Eagle Flat) Aquifer GAM | Model (5MB zipped, 45MB unzipped) | Geodatabase (555MB zipped, 2.2GB unzipped) | Model grid (last updated: 10/12/2023; 0.5MB zipped, 5.3MB unzipped) | Report | N/A | |
| West Texas Bolsons (Presidio and Redford Bolsons) Aquifer GAM | Model (81MB zipped, 92MB unzipped) | Geodatabase (563MB zipped, 590MB unzipped) | Model grid (last updated: 10/12/2023; 4.5MB zipped, 29.8MB unzipped) | N/A | ||
| Yegua-Jackson Aquifer GAM | Model (149MB zipped, 1.8GB unzipped) | Geodatabase (1.7GB zipped, 13.7GB unzipped) | Model grid (last updated: 10/12/2023; 5.9MB zipped, 36.4MB unzipped) | Report | Structure |