Trinity (northern portion) and Woodbine AquifersGroundwater Availability Model (GAM)
The Texas Water Development Board (TWDB) contracted with R.W.Harden & Associates (who teamed with LBG-Guyton Associates, HDR Engineering Inc., Freese & Nichols Inc., United States Geological Survey, and Dr. Joe Yelderman Jr.) to develop a model of the northern portion of the Trinity and Woodbine aquifers. The model was completed in 2004.
In 2006, the Texas Water Development Board (TWDB) contracted again with R.W.Harden & Associates (who teamed with Freese & Nichols Inc. and Texas Bureau of Economic Geology) to investigate the effects of recent pumping in the Dallas-Fort Worth area on the Trinity aquifer due to oil and gas production and the expansion of the Dallas-Fort Worth metropolitan area. This new pumping was analyzed using the existing GAM for the northern portion of the Trinity Aquifer. The project was completed in 2007.
Model Files
Please contact David Thorkildsen (512-936-0871) for a copy of model files. The model files are available in an electronic format with a small processing fee per CD/DVD.
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.
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. The raw/source data may be requested on CD(s) in an electronic format with a processing fee by contacting David Thorkildsen (512-936-0871).
Stakeholder Advisory Forums (SAF)
Send us an email if you would like to receive SAF notifications.
| ID | Date | Location |
|---|---|---|
| SAF 4 | 2/25/2004 | Dallas, Texas - Quoin's Dallas Facility (11111 Stemmons Freeway) |
| SAF 3 | 12/3/2003 | Waco, Texas - Brazos River Authority (4600 Cobbs Drive) |
| SAF 2 | 8/5/2003 | Fort Worth, Texas - Freese & Nichols, Inc. (4055 International Plaza) |
| SAF 1 | 3/19/2003 | Hillsboro, Texas - Harris Education Center (200 Line Street) |
| Pre SAF | 2/19/2002 | Waco, Texas - Baylor University, Sid Richardson Science Building |
Other Resources
Please see the Trinity and Woodbine aquifer pages, the Groundwater Management Area 8 GAM page, and the Research Projects in Support of Groundwater Models page for other reports and publications.
For model runs see the GMA 8 page.