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Texas Water
Development Board

Region L (South Central Texas)

Groundwater Related Reports

IDDateTypeDescription
R-3652/1/2006TWDB numbered reportAquifers of the Gulf Coast of Texas
R-2367/1/1979TWDB numbered reportStratigraphic and Hydrogeologic Framework of Part of the Coastal Plain of Texas
B-65208/1/1965Groundwater bulletinGround-Water Resources of La Salle and McMullen Counties, Texas
R-0966/1/1969TWDB numbered reportA Statistical Study of the Depth of Precipitable Water in Western Texas and Eastern New Mexico
HA-031/1/1995Hydrologic atlasWater Quality in the Edwards-Trinity (Plateau) Aquifer, Edwards Plateau and Trans-Pecos, Texas
GMA7_DFC_017/29/2010DFC submissionDesired future conditions for the Capitan Reef Complex, Dockum, Edwards-Trinity (Plateau), Ellenburger-San Saba, Hickory, Lipan, Marble Falls, Ogallala, and Rustler aquifers
LP-2142/1/1995Limited publicationEvaluation of Ground-Water Quality in Texas Counties Bordering the Rio Grande
HA-051/1/1997Hydrologic atlasWater Quality in the Sparta Aquifer
HA-061/1/1997Hydrologic atlasWater Quality in the Queen City Aquifer
GMA9_DFC_018/29/2008DFC submissionDesired future conditions for the Edwards Group of the Edwards-Trinity (Plateau), Ellenburger-San Saba, Hickory, and Marble Falls aquifers
GMA9_DFC_027/26/2010DFC submissionDesired future conditions for the Edwards Group of the Edwards-Trinity (Plateau) and Trinity aquifers
AA09-018/26/2010Aquifer assessmentDesired future condition scenarios for the Leona Gravel Aquifer in Medina County
GMA10_DFC_015/17/2010DFC submissionDesired future conditions for the Leona Gravel Aquifer
GMA10_DFC_028/4/2010DFC submissionDesired future conditions for the fresh and saline Edwards Aquifer
GMA10_DFC_038/23/2010DFC submissionDesired future conditions for the Trinity, Austin Chalk, Buda Limestone, and Leona Gravel aquifers
CR-00994832793/1/2000Contract reportTransmissivity, Hydraulic Conductivity, and Storativity of the Carrizo-Wilcox Aquifer in Texas
B-62021/1/1962Groundwater bulletinGround-Water Resources of Victoria and Calhoun Counties, Texas
B-631210/1/1963Groundwater bulletinGround-Water Resources of Refugio County, Texas
B-65188/1/1965Groundwater bulletinGround-Water Resources of De Witt County, Texas
R-3329/1/1991TWDB numbered reportGround-Water Resources of the Carrizo-Wilcox Aquifer in the Central Texas Region
GMA13_DFC_014/9/2010DFC submissionDesired future conditions for the Carrizo-Wilcox, Queen City, and Sparta aquifers
GMA13_DFC_028/12/2010DFC submissionDesired future conditions for the Edwards and Yegua-Jackson aquifers
GMA15_DFC_017/14/2010DFC submissionDesired future conditions for the Gulf Coast Aquifer
B-62127/1/1962Groundwater bulletinGeology and Ground-Water Resources of Uvalde County, Texas
B-60036/1/1960Groundwater bulletinGeology and Ground-Water Resources of Dimmit County, Texas
B-591110/1/1959Groundwater bulletinGround-Water Geology of Bexar County, Texas
B-57107/1/1957Groundwater bulletinGround-Water Geology of Wilson County, Texas
R-0193/1/1966TWDB numbered reportGround-Water Resources of Guadalupe County, Texas
R-0129/1/1975TWDB numbered reportGround-Water Resources of Caldwell County, Texas
R-00411/1/1965TWDB numbered reportGround-Water Resources of Gonzales County, Texas
R-3407/1/1992TWDB numbered reportModel Refinement and Applications for the Edwards (Balcones Fault Zone) Aquifer in the San Antonio Region, Texas
LP-2081/1/1989Limited publicationA Digital Model of the Carrizo-Wilcox Aquifer Within the Colorado River Basin of Texas (cross-section figureslinked here)
B-60048/1/1960Groundwater bulletinGeology and Ground-Water Resources of Hays County, Texas
R-03212/1/1966TWDB numbered reportGround-Water Resources of Atascosa and Frio Counties, Texas
R-2346/1/1979TWDB numbered reportGeohydrology of Comal, San Marcos, and Hueco Springs
R-29611/1/1986TWDB numbered reportCarbonate Geology and Hydrology of the Edwards Aquifer in the San Antonio Area, Texas
R-23910/1/1979TWDB numbered reportGround-Water Resources and Model Applications for the Edwards (Balcones Fault Zone) Aquifer in the San Antonio Region
R-2731/1/1983TWDB numbered reportGround-Water Availability of the Lower Cretaceous Formations in the Hill Country of South-Central Texas
R-3539/1/2000TWDB numbered reportGroundwater Availability of the Trinity Aquifer, Hill Country Area, Texas: Numerical Simulations through 2050
R-3602/9/2004TWDB numbered reportConference Proceedings: Aquifers of the Edwards Plateau
R-3463/1/1996TWDB numbered reportThe Paleozoic and Related Aquifers of Central Texas
R-3398/1/1992TWDB numbered reportEvaluation of Ground-Water Resources of the Paleozoic and Cretaceous Aquifers in the Hill Country of Central Texas
GMA13_DFC_037/13/2011DFC submissionDesired future conditions for the Leona Gravel Aquifer
R-3776/1/2011TWDB numbered reportGroundwater Availability Model: Hill Country Portion of the Trinity Aquifer of Texas
AA09-02_D4/20/2010Aquifer assessmentDesired future condition scenarios for the middle and lower Trinity Aquifer in Groundwater Management Area 10
AA10-03_D6/10/2010Aquifer assessmentDesired future condition scenarios for the Trinity Aquifer in Groundwater Management Area 10
AA10-067/28/2010Aquifer assessmentDesired future condition scenarios for the Trinity Aquifer in Groundwater Management Area 10
GR10-024_MP8/18/2010GAM run - Management PlanManagement plan information for Wintergarden GCD
GT10-0129/9/2010GAM taskPredictive simulations for the Yegua-Jackson Aquifer
GR10-022_MP7/9/2010GAM run - Management PlanManagement plan information for Uvalde County UWCD
GT10-0311/25/2011GAM taskAdditional results from the analysis completed in GAM Task 10-005
GR10-015_MP6/15/2010GAM run - Management PlanManagement plan information for Evergreen UWCD
GR10-0086/30/2010GAM runPredictive simulations for the Gulf Coast Aquifer in Groundwater Management Area 15
GR10-008_Add6/30/2010GAM runPredictive simulations for the Gulf Coast Aquifer in Groundwater Management Area 15
GR09-0346/29/2010GAM runPredictive simulations for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13
GR09-033_MP7/29/2010GAM run - Management PlanManagement plan information for Hays Trinity GCD
GR09-031_MP7/9/2010GAM run - Management PlanManagement plan information for Medina County GCD
GR09-030_MP10/21/2009GAM run - Management PlanManagement plan information for Cow Creek GCD
GR09-0119/14/2010GAM runPredictive simulations for the Edwards-Trinity (Plateau) and Trinity aquifers in Groundwater Management Area 9
GR09-0129/14/2010GAM runPredictive simulations for the Edwards-Trinity (Plateau) and Trinity aquifers in Groundwater Management Area 9
GR09-0249/14/2010GAM runPredictive simulations for the Edwards-Trinity (Plateau) and Trinity aquifers in Groundwater Management Area 9
GR09-011_S9/13/2010GAM runPredictive simulations for the Edwards-Trinity (Plateau) and Trinity aquifers in Groundwater Management Area 9
GR09-012_S9/13/2010GAM runPredictive simulations for the Edwards-Trinity (Plateau) and Trinity aquifers in Groundwater Management Area 9
GR09-024_S9/13/2010GAM runPredictive simulations for the Edwards-Trinity (Plateau) and Trinity aquifers in Groundwater Management Area 9
GR09-0196/1/2011GAM runPredictive simulations for the Edwards (Balcones Fault Zone) Aquifer in Groundwater Management Area 10
GR09-0046/29/2010GAM runPredictive simulations for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13
GR08-07012/2/2008GAM runPredictive and steady-state simulations for the Trinity Aquifer in Groundwater Management Area 9
GR08-067_MP9/3/2008GAM run - Management PlanManagement plan information for the Edwards Aquifer Authority
GR08-062_MP9/3/2008GAM run - Management PlanManagement plan information for Evergreen UWCD
GR08-0563/17/2009GAM runsimulation for the Gulf Coast Aquifer in Groundwater Management Area15
GR08-0439/19/2008GAM runPredictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13
GR08-043_CM9/29/2008GAM runAverage drawdowns by county for GAM Runs 08-41, 08-42, and 08-43 in Groundwater Management Area 13
GR08-0429/12/2008GAM runPredictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13
GR08-0419/17/2008GAM runPredictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13
GR08-039_MP5/30/2008GAM run - Management PlanManagement plan information for Refugio GCD
GR08-038_MP5/30/2008GAM run - Management PlanManagement plan information for Pecan Valley GCD
GR08-037_MP6/20/2008GAM run - Management PlanManagement plan information for Barton Springs/Edwards Aquifer Conservation District
GR08-032_MP5/23/2008GAM run - Management PlanManagement plan information for Victoria County GCD
GR08-0308/19/2008GAM runPredictive simulation for the Trinity Aquifer in Groundwater Management Area 9
GR08-0207/28/2008GAM runPredictive simulation for the Trinity Aquifer in Groundwater Management Area 9
GR08-0157/8/2008GAM runPredictive simulation for the Trinity Aquifer in Groundwater Management Area 9
GR08-009_MP4/10/2008GAM run - Management PlanManagement plan information for Goliad County GCD
GR07-0433/21/2008GAM runPredictive simulation for the Gulf Coast Aquifer in Groundwater Management Area 15
GR07-0423/21/2008GAM runPredictive simulation for the Gulf Coast Aquifer in Groundwater Management Area 15
GR07-0374/9/2008GAM runPredictive simulation for the Edwards-Trinity (Plateau) Aquifer in Groundwater Management Area 7
GR07-03212/11/2007GAM runHistoric and predictive simulation for the Edwards-Trinity (Plateau) Aquifer in Groundwater Management Area 7
GR07-025_MP9/6/2007GAM run - Management PlanManagement plan information for Guadalupe GCD
GR07-024_MP9/5/2007GAM run - Management PlanManagement plan information for Cow Creek GCD
GR07-0187/13/2007GAM runSimulation to document locations and discharges to springs and rivers, and document the water budget in Groundwater Management Area 9
GR07-0179/28/2007GAM runPredictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13
GR07-0166/26/2007GAM runPredictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13
GR07-0124/19/2007GAM runPredictive simulation for the Gulf Coast Aquifer in Groundwater Management Areas 15 and 16
GR07-01410/15/2007GAM runPredictive simulation for the Gulf Coast Aquifer in Groundwater Management Areas 15 and 16
GR06-0332/12/2007GAM runEffects on springflow and river flow of various pumping scenarios in the San Antonio Segment of the Edwards (Balcones Fault Zone) Aquifer
GR06-0304/18/2008GAM runSimulation of discharge to the Leona Gravel Aquifer from the Edwards (Balcones Fault Zone) Aquifer
GR06-0291/11/2007GAM runPredictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13
GR06-029_CM11/8/2011GAM runAverage drawdowns for the Carrizo-Wilcox, Queen City, and Sparta aquifers based on the analysis completed in GAM Run 06-029
GR07-014_CM12/11/2007GAM runAdditional results from the analysis completed in GAM Run 07-014
GR06-018_MP8/2/2006GAM run - Management PlanManagement plan information for Plum Creek Conservation District
GR05-0359/12/2005GAM runEffects on Guadalupe River flow from various pumping scenarios in the Trinity Aquifer
GR05-034_MP9/8/2005GAM run - Management PlanManagement plan information for Wintergarden GCD
GR05-0307/15/2005GAM runRecharge information for the Carrizo-Wilcox, Edwards-Trinity (Plateau) and Trinity aquifers in Uvalde County
GR05-0317/21/2005GAM runRecharge information for the Carrizo-Wilcox and Trinity aquifers in Medina County
GR05-0287/20/2005GAM runRecharge information for the Queen City and Sparta aquifers in Dimmit, La Salle, and Zavala counties
GR05-028_Add7/25/2005GAM runWater budget information for the Queen City and Sparta aquifers in Dimmit, La Salle, and Zavala counties
GR05-02710/27/2005GAM runPredictive simulation for the Gulf Coast Aquifer in Goliad County
GR11-017_MP11/29/2011GAM run - Management PlanManagement plan information for Guadalupe GCD
GR05-0157/13/2005GAM runPredictive simulation for the Gulf Coast Aquifer in Goliad County
GR05-0145/17/2005GAM runPredictive simulation for the Gulf Coast Aquifer in Goliad County
GR05-0041/23/2005GAM runCalibration of the Gulf Coast (central) Aquifer GAM to evaluate drawdowns from fully penetrating wells in the Evangeline Aquifer
GR04-01810/7/2004GAM runRecharge rates for the Trinity Aquifer in Hays Trinity GCD
GR03-0345/14/2004GAM runAnalytical groundwater modeling to assess water level drawdown by implementing hypothetical well fields
GR03-02910/31/2003GAM runDecadal water level declines for the Upper and Middle Trinity aquifers of the Trinity (Hill Country) GAM
GR03-0279/22/2003GAM runWater budget and total storage above 4000 depth in Evergreen UWCD
GR03-0127/18/2003GAM runWater budget, storage, and drawdown in 2050 for the Trinity (Hill Country) and Carrizo-Wilcox aquifers in Medina County GCD
GR03-0113/21/2003GAM runWater budget by county for the Trinity (Hill Country) Aquifer
GR03-0073/7/2005GAM runRefugio county water budget for the Gulf Coast Aquifer
GR03-0055/20/2003GAM runEstimated water levels at specified locations in the Trinity (Hill Country) GAM
GR03-0023/21/2003GAM runAverage well yield in Kendall County for the Trinity (Hill Country) Aquifer GAM
GR10-041_MAG12/7/2011GAM run - MAGModeled available groundwater estimates for the Yegua-Jackson Aquifer in Groundwater Management Area 13
GR08-090_MAG3/6/2009GAM run - MAGManaged available groundwater estimates for the Edwards Group of the Edwards-Trinity (Plateau) Aquifer in Groundwater Management Area 9
GR03-0015/20/2005GAM runPredictive simulation for the Gulf Coast Aquifer in Goliad County GCD
GR02-0013/21/2003GAM runCounty water budget for the Trinity (Hill Country) Aquifer GAM
GR02-0023/21/2003GAM runCounty water budget for the Trinity (Hill Country) Aquifer GAM
AA08-0510/22/2009Aquifer assessmentDesired future condition scenarios for the Edwards-Trinity (Plateau) Aquifer in Groundwater Management Area 7
GR10-050_MAG_Rev13/30/2012GAM run - MAGModeled available groundwater estimates for the Trinity Aquifer in Groundwater Management Area 9
GR10-049_MAG_Rev13/28/2012GAM run - MAGModeled available groundwater estimates for the Edwards Group of the Edwards-Trinity (Plateau) Aquifer in Groundwater Management Area 9
GR11-0076/12/2012GAM runEstimated drawdown under assumed future pumping for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13
GR11-007_Add6/12/2012GAM runDrawdown maps and water budget for GAM run 11-007
GR09-034_Add6/27/2012GAM runPredictive simulations for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13
GR12-001_MP7/2/2012GAM run - Management PlanManagement plan data for Plum Creek CD
GR10-028_MAG11/18/2011GAM run - MAGModeled available groundwater for the Gulf Coast Aquifer in Groundwater Management Area 15
AA10-26_MAG8/19/2011Aquifer assessment MAGManaged available groundwater for the Austin Chalk Aquifer in Uvalde County
AA10-27_MAG8/19/2011Aquifer assessment MAGManaged available groundwater for the Buda Limestone Aquifer in Uvalde County
AA10-29_MAG11/29/2011Aquifer assessment MAGModeled available groundwater for the Trinity Aquifer in Groundwater Management Area 10
AA10-35_MAG11/20/2011Aquifer assessment MAGModeled available groundwater for the saline Edwards Aquifer in the Northern Subdivision of Groundwater Management Area 10
CR-090483100110/31/2011Contract reportEstimation of Groundwater Recharge to the Gulf Coast Aquifer in Texas, USA
GR10-012_MAG8/2/2012GAM run - MAGModeled available groundwater for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13
AA10-40_MAG8/20/2012Aquifer assessment MAGModeled available groundwater for the Edwards Aquifer in Frio County
AA10-41_MAG8/20/2012Aquifer assessment MAGModeled available groundwater for the Leona Gravel Aquifer in Medina County
AA10-07_MAG8/20/2012Aquifer assessment MAGModeled available groundwater for the Leona Gravel Aquifer in Medina County
CR-09048308204/1/2010Contract reportApplication of PEST to Re-Calibrate the Groundwater Availability Model for the Edwards-Trinity (Plateau) and Pecos Valley Aquifers
CR-08048307952/1/2010Contract reportHydrostratigraphy of the Gulf Coast Aquifer from the Brazos River to the Rio Grande
GR10-043_MAG_Rev111/12/2012GAM run - MAGModeled available groundwater for the Edwards-Trinity (Plateau), Pecos Valley, and Trinity aquifers in Groundwater Management Area 7
GR12-024_MP12/5/2012GAM run - Management PlanManagement plan information for Pecan Valley GCD
GR12-018_MP11/30/2012GAM run - Management PlanManagement plan data for Goliad County GCD
GR12-022_MP11/29/2012GAM run - Management PlanManagement plan data for Victoria County GCD
GR04-021_Ver22/14/2005GAM runPredictive model input files for the Gulf Coast (central) Aquifer
GR10-059_MAG_Ver212/7/2011GAM run - MAGModeled available groundwater for the Edwards (Balcones Fault Zone) Aquifer in the Northern Subdivision of Groundwater Management Area 10
GR09-010_Ver29/16/2010GAM runPredictive simulation for the Gulf Coast Aquifer in Groundwater Management Area 15
GR08-022_MP_Ver28/14/2008GAM run - Management PlanManagement plan information for Gonzales County UWCD
GR12-018_MP_Ver21/24/2013GAM run - Management PlanGoliad County GCD Management Plan GAM Run, version 2
AA10-28_MAG2/4/2013Aquifer assessment MAGModeled available groundwater for the Leona Gravel Aquifer in Uvalde County
GR13-008_MP6/25/2013GAM run - Management PlanManagement Plan data for Refugio GCD
GR13-014_MP6/25/2013GAM run - Management PlanManagement Plan data for Gonzales County UWCD
GR13-029_MP11/15/2013GAM run - Management PlanManagement plan data for Cow Creek GCD
GR09-032_MP7/9/2010GAM run - Management PlanManagement plan information for Trinity-Glen Rose GCD
GR15-001_MP2/17/2015GAM run - Management PlanManagement plan data for Trinity Glen Rose GCD
GR15-005_MP3/6/2015GAM run - Management PlanManagement plan data for Hays Trinity GCD
GR15-009_MP3/18/2015GAM run - Management PlanManagement Plan data for Edwards Aquifer Authority
GR15-002_MP6/30/2015GAM run - Management PlanManagement plan data for Medina County GCD
GR15-004_MP6/30/2015GAM run - Management PlanManagement Plan data for Evergreen UWCD
GR15-006_MP6/26/2015GAM run - Management PlanManagement Plan data for Uvalde County UWCD
GR15-007_MP7/29/2015GAM run - Management PlanManagement Plan data for Wintergarden GCD
GR15-010_MP8/12/2015GAM run - Management PlanManagement Plan data for Calhoun County GCD
AA16-01_S12/14/2016Aquifer assessmentTotal Estimated Recoverable Storage for Groundwater in GMA 10 (Supplement to GAM Task 13-033)
GR18-006_MP4/9/2018GAM run - Management PlanManagement plan information for Gonzales County UWCD
GR18-011_MP5/21/2018GAM run - Management PlanManagement plan information for Pecan Valley GCD
GR19-011_MP2/27/2019GAM run - Management PlanManagement plan information for Cow Creek GCD
GR19-025_MP11/15/2019GAM run - Management PlanManagement plan information for Glen Rose GCD
GR19-026_MP1/9/2020GAM run - Management PlanManagement plan information for Hays Trinity GCD
GR20-003_MP8/25/2020GAM run - Management PlanManagement plan information for Medina County GCD
GR20-004_MP9/30/2020GAM run - Management PlanManagement plan information for Wintergarden GCD
GR22-004_MP2/3/2022GAM run - Management PlanManagement plan information for Calhoun County GCD
GR22-006_MP3/28/2022GAM run - Management PlanManagement plan information for Barton Springs Edwards Aquifer Conservation District
GR21-018_MAG7/25/2022GAM run - MAGModeled available groundwater for the Carrizo-Wilcox, Queen City, Sparta, and Yegua-Jackson aquifers in Groundwater Management Area 13
GR21-012_MAG8/12/2022GAM run - MAGModeled available groundwater estimates for the aquifers in Groundwater Management Area 7
GR21-020_MAG8/16/2022GAM run - MAGModeled available groundwater estimates for the Gulf Coast Aquifer System in Groundwater Management Area 15
GR22-012_MP10/14/2022GAM run - Management PlanManagement plan information for Comal Trinity GCD
GR21-014_MAG12/8/2022GAM run - MAGModeled available groundwater estimate for the aquifers in Groundwater Management Area 9
GR21-015_MAG4/12/2023GAM run - MAGModeled Available Groundwater for the aquifers in Groundwater Management 10
GR23-018_MP10/09/2023GAM run - Management PlanManagement plan information for Gonzales County UWCD
GR24-008_MP09/12/2024GAM run - Management PlanManagement plan information for Cow Creek GCD

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