Longevity Assessment for City of Bandera Water Wells
Study Summary:
The goals of the study are to (1) evaluate water level decline in the lower Trinity Aquifer in Bandera county, and (2) predict future water levels in the aquifer in this area. The results of this study will be used to evaluate the need for an Aquifer Storage and Recovery (ASR) project(s) to augment the water supply of the lower Trinity Aquifer to meet the growing demand of the city of Bandera and new subdivisions in Bandera County.
The objectives of the study are to:
- Create a groundwater model of the lower Trinity Aquifer for the study area
- The new groundwater model will be based on the Hill Country Trinity Groundwater Availability Model (GAM) but modified as follows:
- change the grid cell size in Bandera county area, from 1-mile to 0.25-mile and
- update the lower Trinity aquifer pumpage information from 1997 to 2020
- update the lower Trinity aquifer hydraulic conductivity based on observed and modeled water levels
- The new groundwater model will be based on the Hill Country Trinity Groundwater Availability Model (GAM) but modified as follows:
- Process the model to predict future water levels based on the city fully utilizing existing groundwater supply volumes from the 2021 Region J Water Plan
- Process the model to predict future water levels based on 2021 Region J Water Plan available supply until the 2070 decade
- Prepare and publish study findings in a TWDB report
- Study Team Members:
- Azzah AlKurdi, Shirley Wade, James Golab, and Andrea Croskrey
- Study Start Date:
- Winter 2020/2021
- Study Completion Date:
- Winter 2022/2023
- Benefits:
- The study will develop data and a report that will be available to researchers and decision-makers to assist in evaluation of future ASR projects.
Study Details
Participants
Study Investigators:
Texas Water Development Board
1700 N. Congress Avenue
Austin, TX 78711
Azzah AlKurdi
Azzah.Alkurdi@twdb.texas.gov
512-475-1874
Shirley Wade, Ph.D., P.G.
James Golab, Ph.D., P.G.
James.Golab@twdb.texas.gov
512-475-1540
Andrea Croskrey, P.G.
Andrea.Croskrey@twdb.texas.gov
512-463-2865
Engaged Stakeholders:
Bandera County River Authority and Groundwater District (BCRAGD)
Dave Mauk - General Manager
440 FM 3250 | P.O. Box 177
Bandera, TX 78003
830-796-7260
City of Bandera
Rebecca Gibson- Mayor
511 Main Street
P.O. Box 2443
Bandera, TX 78003
830-796-3765
Study Milestones
Event | Date |
---|---|
Meeting with BCRAGD and City of Bandera, Conference call | July 30, 2020 |
Meeting with BCRAGD and City of Bandera, Microsoft Teams | January 15, 2021 |
Preliminary Results Presentation, Microsoft Teams | February 14, 2022 |
Final results presentation to the Bandera City Council, Bandera City Hall | January 17, 2023 |
Public Webinar, GotoWebinar | March 30, 2023 |
Presentations
Final Report
- Final Report (59.8 MB)
- Errata Sheet (63 KB)
- Model Files (511 MB zipfile, 3.77 GB unzipped)
- GIS Datasets (61.8 MB zipfile, 136 MB unzipped)