Ground Water Availability Models
Texas Water Development Board - Water Availability page
A. Provide technical support to the SCTRWPG in the review of Groundwater Availability Model (GAM) results and consideration of groundwater conservation district management plans. GAMs potentially applicable in Region L and their expected dates of completion include the following:
1. Trinity (Hill Country) February 2001
2. Edwards (Barton Springs segment) October 2001
3. Gulf Coast (central part) December 2002
4. Carrizo-Wilcox (central part) December 2002
5. Carrizo-Wilcox (southern part) December 2002
6. Edwards (San Antonio segment) December 2003
Timely availability of GAMs will be essential to allow the SCTRWPG sufficient time to apply them in quantifying groundwater availability and evaluating water management strategies subject to policies and regulation of local groundwater conservation districts and/or regulatory authorities.
B. Apply available GAMs and/or other appropriate models to quantify groundwater supply subject to groundwater conservation district management plans. Given the timing for completion of the Edwards (San Antonio segment) GAM, ongoing development of an Habitat Conservation Plan and Critical Period Management rules by the Edwards Aquifer Authority (EAA), and pending litigation regarding permits, groundwater availability from the Edwards Aquifer will be based on the pro-ration of current proposed permits to a total of 340,000 acft/yr.
C. Compile groundwater availability information by Source, Water User Group, and Wholesale Water Provider as necessary to obtain decadal estimates of supply throughout the planning period.
D. Complete required data elements for TWDB database Form 1 (Sources), Form 2 (Water User Groups), and Form 3 (Wholesale Water Providers).