Regional Water Plan: Region L (South Central Texas), 2016, Volume 1. Executive Summary and Regional Water Plan Page: III
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2016 South Central Texas Regional Water Plan
Volume I 0
Table of Contents
ES Executive Summary ...................................................................................................................... ES-1
1 Description of the South Central Texas Region [31 TAC 357.30]..................................................1-1
1.1 Background.............................................................................................................................1-1
1.2 Physical Description of the South Central Texas Region ......................................................1-2
1.2.1 Climate ......................................................................................................................1-2
1.2.2 General Geology .......................................................................................................1-4
1.2.3 Vegetational Areas ....................................................................................................1-5
1.2.4 Natural Resources.....................................................................................................1-8
1.2.5 Major Water Demand Centers ................................................................................1-10
1.3 Population and Dem ography................................................................................................1-10
1.3.1 Historical and Recent Trends in Population ...........................................................1-10
1.3.2 Dem ographic Characteristics..................................................................................1-12
1.4 Econom y - M ajor Sectors and Industries...........................................................................1-15
1.4.1 Summary of the South Central Texas Regional Economy.....................1-15
1.4.2 Agricultural Production ............................................................................................1-16
1.4.3 Livestock Production ...............................................................................................1-17
1.4.4 Mining ......................................................................................................................1-19
1.4.5 M anufacturing ...............................................1-20
1.4.6 Trades and Services ...............................................................................................1-20
1.5 W ater Uses...........................................................................................................................1-20
1.6 W holesale W ater Providers..................................................................................................1-21
1.6.1 San Antonio Water System .....................................................................................1-21
1.6.2 G uadalupe-Blanco River Authority..........................................................................1-22
1.6.3 Canyon Regional W ater Authority...........................................................................1-22
1.6.4 Schertz-Seguin Local G overnm ent Corporation .....................................................1-22
1.6.5 Springs Hill W SC .....................................................................................................1-22
1.6.6 Texas Water Alliance ..............................................................................................1-23
1.6.7 Hays-Caldwell Public Utility Agency........................................................................1-23
1.6.8 Cibolo Valley Local Governm ent Corporation.........................................................1-23
1.7 Water Resources and Quality Considerations .....................................................................1-23
1.7.1 G roundwater............................................................................................................1-23
1.7.2 Surface Water .........................................................................................................1-27
1.7.3 M ajor Springs ................................................................................1-30
1.7.4 Surface Water Quality .............................................................................................1-31
1.8 Threats to Agricultural and Natural Resources ....................................................................1-32
1.9 Summary of Existing Plans ..................................................................................................1-33
1.9.1 2012 State Water Plan ............................................................................................1-33
1.9.2 2011 Regional Water Plan ......................................................................................1-34
1.9.3 Local Water Plans ...................................................................................................1-34
1.9.4 Current Preparations for Drought............................................................................1-34
1.10 Water Loss Audits ................................................................................................................1-36
1.11 Drought of Record.................................................................................................................1-40
2 Population and W ater Dem and Projections [31 TAC 357.31].......................................................2-1
2.1 Population Projections..........................................................................................................2-12.2 M unicipal W ater Dem and Projections ....................................................................................2-1
2.3 Industrial W ater Dem and Projections.....................................................................................2-6
2.4 Steam -Electric Power W ater Dem and Projections ................................................................2-8
December 2015 iii
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South Central Texas Regional Water Planning Group. Regional Water Plan: Region L (South Central Texas), 2016, Volume 1. Executive Summary and Regional Water Plan, report, December 2015; San Antonio, Texas. (https://texashistory.unt.edu/ark:/67531/metapth839410/m1/7/?q=%22~1%22~1&rotate=90: accessed August 15, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.