Displaying All Reports

Title: 1983-84 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1983-84, with 1934-84 Summary
Description:
Annual report for 1983-84 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: 1985 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1985, with 1934-85 Summary
Description:
Annual report for 1985 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region. Note: Large‐format versions of the plates for this report are available at: http://www.edwardsaquifer.org/documents/1987_Ozuna-etal_1985HydrologicData-Plates.pdf.
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Title: 1985 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1985, with 1934-85 Summary - Plates
Description:
Full-size plates for annual report for 1985 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region. Note: Requires large-format printer.
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Title: 1986 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1986, with 1934-86 Summary
Description:
Annual report for 1986 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region. Note: Large-format versions of the plates for this report are available at: http://www.edwardsaquifer.org/documents/ 1988_Ozuna-etal_1986HydrologicData-Plates.pdf
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Title: 1986 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1986, with 1934-86 Summary - Plates
Description:
Plates from annual report for 1986 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region. Note: Requires large-format printer.
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Title: 1987 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1987, with 1934-87 Summary
Description:
Annual report for 1987 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region. Note: Large-format versions of the plates for this report are available Here
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Title: 1987 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1987, with 1934-87 Summary - Plates
Description:
Plates from annual report for 1987 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region. Note: Requires large-format printer.
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Title: 1988 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1988, with 1934-88 Summary
Description:
Annual report for 1988 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region. Note: Large-format versions of the plates for this report are available at:http://www.edwardsaquifer.org/documents/1989_Nalley_1988HydrologicData.pdf.
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Title: 1988 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1988, with 1934-88 Summary - Plates
Description:
Plates from 1988 annual report on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region. Note: Original size plates - need large-format printer.
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Title: 1989 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1989, with 1934-89 Summary
Description:
Annual report for 1989 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: 1989 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1989, with 1934-89 Summary - Plates
Description:
Plates from 1989 annual report on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region. Note: Original size plates - need large-format printer.
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Title: 1990 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1990, with 1934-90 Summary
Description:
Annual report for 1990 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: 1990 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1990, with 1934-90 Summary-Plates
Description:
Large-format plates for the 1990 Hydrologic Data Report - see companion document.
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Title: 1991 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1991, with 1934-91 Summary
Description:
Annual report for 1991 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: 1991 Hydrologic Data Report - Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1991, with 1934-91 Summary-Plates
Description:
Large-format plates for the 1991 Hydrologic Data Report. See companion document.
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Title: 1994 Review and Update of the Position of the Edwards Aquifer Freshwater/Saline-Water Interface from Uvalde to Kyle, Texas
Description:
1994 attempt to describe the location of the freshwater/saline-water interface accurately from Kyle to Uvalde, Texas
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Title: 1994 Review and Update of the Position of the Edwards Aquifer Freshwater/Saline-Water Interface from Uvalde to Kyle, Texas-Plates
Description:
Large-format plates for 1994 Review and Update of the Position of the Edwards Aquifer Freshwater/Saline-Water Interface from Uvalde to Kyle, Texas. See companion document.
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Title: 2010 Edwards Aquifer Hydrologic Data Fact Sheet for Precipitation, Groundwater Levels and Drought Conditions
Description:
Summary for 2010 on precipitation, groundwater levels, and drought in the Edwards Aquifer San Antonio Region
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Title: 2010 Edwards Aquifer Hydrologic Data Fact Sheet for Recharge and Discharge
Description:
Summary for 2010 on recharge and discharge in the Edwards Aquifer San Antonio Region
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Title: 2011 Edwards Aquifer Hydrologic Data Fact Sheet for Recharge and Discharge
Description:
2011 Edwards Aquifer Hydrologic Data Fact Sheet for Recharge and Discharge
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Title: 2011 Hydrologic Data Fact Sheet for Precipitation, Groundwater Levels and Drought Conditions
Description:
Summary for 2011 on precipitation, groundwater levels, and drought in the Edwards Aquifer San Antonio Region
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Title: A Lumped Parameter Model for the Edwards Aquifer
Description:
Computer modeling of the San Antonio region of the Edwards Aquifer using a nonlinear optimization algorithm with a Kalman filter
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Title: A preliminary report of findings for the karst terrains feature known as Rugh Cavern, located along northern Seco Creek, northwestern Medina County, Texas
Description:
Preliminary findings on Rugh Sinkhole/Cave in Seco Creek, Medina County, TX
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Title: A Statistical Study of the Hydrological Character of the Edwards Aquifer
Description:
Statistical analysis of surface and groundwater levels from October 1998 storm event
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Title: Additional Graphical Materials to the Edwards Aquifer (San Antonio Region) Groundwater Flow Model (Lindren et al., 2004)
Description:
Visual output for flowpath simulation, steady-state and transient water level residuals, and watr-level root mean square error distributions for target wells using MODFLOW/GWSIM models and data from Lindgren et al, 2004
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Title: An Evaluation of the 1997 Edwards Aquifer Irrigation Suspension
Description:
Evaluation of Edwards Aquifer Authority’s Irrigation Suspension Program in 1997 and alternatives
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Title: Analysis of Data from Test-Well Sites along the Downdip Limit of Freshwater in the Edwards Aquifer, San Antonio, Texas, 1985-87
Description:
Geochemical and hydrochemical study of the Edwards Aquifer downdip area and saline-freshwater interface in the San Antonio area
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Title: Analysis of Recharge and Recirculation Edwards Aquifer Phase 1
Description:
Testing the MODFLOW model with historical data of recharge and recirculation at two hypothetical recharge sites prior to release of the model
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Title: Analysis of Recharge and Recirculation Edwards Aquifer Phase 2
Description:
Use of the MODFLOW model to examine recharge at eight sites in the Edwards Aquifer and discharge at San Marcos Springs
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Title: Analysis of Water Quality Data for East Elm, West Elm and Lorence Creeks
Description:
Water quality in three small watersheds in the Edwards Aquifer Recharge Zone in relation to storm water runoff and urbanization, 1976 - 1980
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Title: Appendix B A Report Investigating Impacts of Aquifer Pumping Limits on Flow of Comal Springs and San Marcos Springs
Description:
Use of GWSIM-IV model to determine effects of various pumpage reductions on springflow at Comal and San Marcos Springs
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Title: Appendix C of Edwards Aquifer Authority Hydrologic Data Report for 2013
Description:
Appendix C of annual report for 2013 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Appendix C of Edwards Aquifer Authority Hydrologic Data Report for 2014
Description:
Appendix C of Edwards Aquifer Authority Hydrologic Data Report for 2014 Year 2014 Water Quality Data
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Title: Aquatic Vegetation Laboratory Study: Phase 1: Observations of water quality changes and plant growth under various flows. Phase 2: Effects of carbon dioxide level on aquatic plants found in the Comal and San Marcos Springs/River Ecosystems. Final Report Variable Flow Study: Project 802, Task 27 San Marcos National Fish Hatchery & Technology Center, San Marcos, Texas
Description:
Study on effects of changing flow rates and CO2 levels on six species of aquatic vegetation found in the Comal and San Marcos River/Springs ecosystems
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Title: Aquifer Science Research Program Plan: 2006-2011
Description:
Edwards Aquifer Authority Aquifer Science Research Program Plan for 2006-2011
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Title: Assessment of Factors Influencing Texas Wild-Rice (Zizania texana) Sexual and Asexual Reproduction
Description:
Laboratory and field studies on critical determinants of reproduction in Texas Wild-Rice (Zizania texana)
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Title: Assessment of Instream Flow and Habitat Requirements for Cagle’s Map Turtle (Graptemys caglei)
Description:
Field study on population and habitat of Cagle’s Map Turtle and factors affecting them, including instream flow requirements, water quality, and benthics
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Title: Assessment of Recharge Benefit from Enhanced Rainfall
Description:
Using the HSPF model to estimate recharge in the Blanco and Nueces River basins from the Edwards Aquifer Authority Precipitation Enhancement Program in 1999-2001
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Title: Assessment of the Effect of Cloud Seeding in the Edwards Aquifer Target During the 1999, 2000 and 2001 Seasons
Description:
Assessment of the weather modification program by the Edwards Aquifer Authority for the 1999 – 2001 seasons
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Title: Augmenting Groundwater Recharge Through Brush Control: A Feasibility Study—Phase II
Description:
This report summarizes the findings of a 5-year (November 2004–December 2009) investigation of the water dynamics at two sites overlying shallow caves within the Camp Bullis facility in northern Bexar County, Texas. The results of the first phase of this study (November 2004–November 2007) were documented in the Phase I report (Wilcox 2008). In this Phase II report, we summarize the results from the entire study period, focusing on rainfall, cave recharge, and the rainfall simulation experiments conducted during Phase II.
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Title: Bad Water Line Transect Pumping Test at San Antonio City Water Board's Artesia Station, March 25, 1987
Description:
Pumping test at the San Antonio Artesia Station to determine stability and recovery of wells from stress. Note: Page-size and large-format plates are at the end of the document.
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Title: Blasting Effects on Engineered Structures
Description:
Report of field study on effects of blasting charges on structure and function of nearby pipes, wells, and tanks. See accompanying appendices.
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Title: Blasting Effects on Engineered Structures Appendices A-G
Description:
Appendices A-G to main companion report.
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Title: Blasting Effects on Engineered Structures Appendices H, I ,J
Description:
Appendices H, I, J to main companion report
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Title: Carbonate Geology and Hydrology of the Edwards Aquifer in the San Antonio Area, Texas
Description:
Hydrostratigraphic subdivisions, types of rock, permeability and groundwater movement in the Edwards Aquifer in the San Antonio region
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Title: Chemical Analyses of Water from Observation Wells in the Edwards and Associated Limestones, San Antonio Area, Texas [1959-1962]
Description:
Chemical analyses of water from 129 wells to define the boundary of the freshwater-saline water interface in the Edwards Aquifer Balcones Fault Zone San Antonio segment,some data going back to 1959. Note: This report is included for its historical value; results may have been superseded by more recent studies. Last page of file is full-size plate.
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Title: Chemical Analyses of Water from Observation Wells in the Edwards and Associated Limestones, San Antonio Area, Texas, 1963
Description:
Chemical analyses of water from 100 wells to define the boundary of the freshwater-saline water interface in the Edwards Aquifer Balcones Fault Zone San Antonio segment in 1963. Note: This report is included for its historical value; results may have been superseded by more recent studies.
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Title: Chemical Analyses of Water from Observation Wells in the Edwards and Associated Limestones, San Antonio Area, Texas, 1964
Description:
Chemical analyses of water from 80 wells to define the boundary of the freshwater-saline water interface in the Edwards Aquifer Balcones Fault Zone San Antonio segment in 1964. Note: This report is included for its historical value; results may have been superseded by more recent studies.
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Title: Chemical Analyses of Water from Observation Wells in the Edwards and Associated Limestones, San Antonio Area, Texas, 1965
Description:
Chemical analyses of water from 72 wells to define the boundary of the freshwater-saline water interface in the Edwards Aquifer Balcones Fault Zone San Antonio segment in 1965. Note: This report is included for its historical value; results may have been superseded by more recent studies.
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Title: Chemical Analyses of Water from Observation Wells in the Edwards and Associated Limestones, San Antonio Area, Texas, 1966
Description:
Chemical analyses of water from 37 wells to define the boundary of the freshwater-saline water interface in the Edwards Aquifer Balcones Fault Zone San Antonio segment in 1966. Note: This report is included for its historical value; results may have been superseded by more recent studies.
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Title: Chemical Analyses of Water from Observation Wells in the Edwards and Associated Limestones, San Antonio Area, Texas, 1967
Description:
Chemical analyses of water from 37 wells to define the boundary of the freshwater-saline water interface in the Edwards Aquifer Balcones Fault Zone San Antonio segment in 1967. Note: This report is included for its historical value; results may have been superseded by more recent studies.
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Title: Chemical and Bacteriological Quality of Water at Selected Sites in the San Antonio Area, Texas August 1968-April 1972
Description:
Surface and groundwater quality monitoring in the San Antonio area, 1968-1972
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Title: Chemical and Bacteriological Quality of Water at Selected Sites in the San Antonio Area, Texas August 1968-January 1975
Description:
Surface and groundwater quality monitoring in the San Antonio area, 1968-1976. Note: Page-size and full-size plates are at the end of the document.
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Title: Chemical and Bacteriological Quality of Water at Selected Sites in the San Antonio Area, Texas February 1975-September 1977
Description:
Surface and groundwater quality monitoring in the San Antonio area, 1975-1977. Note: Page-size and full-size plate are at the end of the document.
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Title: City of San Marcos Surface Water Development Plan / A Report To The Edwards Underground Water District September 27, 1988
Description:
Plan by the City of San Marcos, TX to develop surface drinking water options with the City of New Braunfels. Note: this document is included for its historical value and may have been replaced by more recent plans.
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Title: Comal Springs Riffle Beetle Habitat and Population Evaluation/ Final Report Variable Flow Study: Project 802, Task 13 Landa Lake, New Braunfels, Texas
Description:
Sampling of Comal Springs riffle beetle in habitat extent study during 2001-2002
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Title: Comal Springs Riffle Beetle Laboratory Study Evaluation Under Variable Flow Conditions
Description:
Laboratory study of the Comal Springs Riffle beetle under varying horizonal and vertical flow conditions
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2001 Annual Report
Description:
Annual report for 2001 on biota study of Comal Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2002 Annual Report
Description:
Annual report for 2002 on biota study of Comal Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2003 Annual Report
Description:
Annual report for 2003 on biota study of Comal Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2004 Annual Report
Description:
Annual report for 2004 on biota study of Comal Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2005 Annual Report
Description:
Annual report for 2005 on biota study of Comal Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2006 Annual Report
Description:
Annual report for 2006 on biota study of Comal Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2007 Annual Report
Description:
Annual report for 2007 on biota study of Comal Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2008 Annual Report
Description:
Annual report for 2008 on biota study of Comal Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2009 Annual Report
Description:
Annual report for 2009 on biota study of Comal Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2010 Annual Report
Description:
Annual report for 2010 on biota study of Comal Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2011 Annual Report
Description:
Annual report for 2011 on biota study of Comal Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal Springs/River Aquatic Ecosystem Final 2012 Annual Report
Description:
Annual report for 2012 on biota study of Comal Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2001 Annual Report
Description:
Annual report for 2001 on biota study of San Marcos Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2001 Annual Report Appendix C: Drop Net Raw Data
Description:
Raw drop-net data for the 2001 Annual report on biota study of San Marcos Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2002 Annual Report
Description:
Annual report for 2002 on biota study of San Marcos Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2003 Annual Report
Description:
Annual report for 2003 on biota study of San Marcos Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2004 Annual Report
Description:
Annual report for 2004 on biota study of San Marcos Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2005 Annual Report
Description:
Annual report for 2005 on biota study of San Marcos Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2006 Annual Report
Description:
Annual report for 2006 on biota study of San Marcos Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2007 Annual Report
Description:
Annual report for 2007 on biota study of San Marcos Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2008 Annual Report
Description:
Annual report for 2008 on biota study of San Marcos Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2009 Annual Report
Description:
Annual report for 2009 on biota study of San Marcos Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2010 Annual Report
Description:
Annual report for 2010 on biota study of San Marcos Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2011 Annual Report
Description:
Annual report for 2011 on biota study of San Marcos Springs/River
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Title: Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the San Marcos Springs/River Aquatic Ecosystem Final 2012 Annual Report
Description:
Annual report for 2012 on biota study of San Marcos Springs/River
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Title: Comprehensive Water Management Plan Edwards Aquifer Authority
Description:
Edward Aquifer Authority’s Comprehensive Water Management Plan as required by Section 1.25 of the Edwards Aquifer Authority Act, for 2000-2030.
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Title: Conceptualization and Simulation of the Edwards Aquifer, San Antonio Region, Texas
Description:
A new ground-flow model for the San Antonio and Barton Springs segments in the San Antonio region. Note: this document is included for its historical value and may have been replace by more recent updates.
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Title: Conduits and Turbulent Flow in the Edwards Aquifer
Description:
Description of the Edwards Aquifer Balcones Fault Zone as a typical karst aquifer and recommendations for locations of conduits in the MODFLOW model
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Title: Defining the Edwards Aquifer Freshwater/Saline-Water Interface with Geophysical Logs and Measured Data (San Antonio to Kyle, Texas)
Description:
Analysis of geophysical logs to define the freshwater/saline water interface in the Edwards Aquifer between San Antonio and Kyle, TX. Note: Large-format versions of the plates for this report are available in a companion document.
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Title: Defining the Edwards Aquifer Freshwater/Saline-Water Interface with Geophysical Logs and Measured Data (San Antonio to Kyle, Texas) - Plates
Description:
Analysis of geophysical logs to define the freshwater/saline water interface in the Edwards Aquifer between San Antonio and Kyle, TX. Note: These are large-format versions of the plates for the companion document.
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Title: DEVELOPMENT OF A FINITE-ELEMENT METHOD GROUNDWATER FLOW MODEL FOR THE EDWARDS AQUIFER
Description:
Attributes of the alternative model that set it conceptually independent from the 2004 MODFLOW model are:  Inclusion of the Contributing Zone  Recharge is calculated directly from precipitation and is not prescribed at the upgradient side of the Recharge Zone  Western boundary is refined to better define the Kinney Pool  The Contributing and Recharge Zones are characterized by three layers  Distinct conduits are included in the Confined Zone  The alternative model employs a finite-element formulation instead of the finite-difference formulation used in the 2004 MODFLOW model
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Title: Diversion Spring Cave
Description:
Documentation of hydrogeology, structure and fauna in Diversion Spring Cave, Hays County, TX
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Title: Draft 30-Year Water Supply Plan
Description:
Draft of 30-year water supply plan for 2000-2030 as part of the Authority's Comprehensive Water Management Plan, adapted from the pertinent parts of the South Central Texas Regional Water Plan
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Title: Drilling, Construction and Testing of Monitor Wells for the Edwards Aquifer Bad Water Line Experiment
Description:
Study of the fresh water-saline interface using new monitoring wells in the San Antonio Artesia Water Field. Note: This report is included for its historical value and may no longer reflect current conditions.
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Title: Ecology of the Exotic Giant Rams-Horn Snail, Marisa cornuarietis, Other Biological Characteristics and a Species/Ecological Review of the Literature of the Comal Springs Ecosystem of South Central Texas
Description:
Literature research on endangered species of the Edwards Aquifer, and field and laboratory studies on the giant rams-horn snail (Marisa cornuarietis)
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Title: Edwards Aquifer Authority Aquifer Science Research Program Plan 2008-2013
Description:
Edwards Aquifer Authority Aquifer Science Research Program Plan for 2008-2013
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Title: Edwards Aquifer Authority Aquifer Science Research Program Plan 2012-2015
Description:
Edwards Aquifer Authority Aquifer Science Research Program Plan for 2012-2015
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Title: Edwards Aquifer Authority Data Management Plan
Description:
Description the objective, tasks, and database structure for the Edwards Aquifer Authority’s data management system
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Title: Edwards Aquifer Authority Groundwater Management Plan 1998-2008
Description:
Groundwater management plan for the Edwards Aquifer Authority for 1998-2008 Note: This report is included for its historical value but has been replaced by a more recent study.
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Title: Edwards Aquifer Authority Hydrogeologic Data Report for 1999
Description:
Annual report for 1999 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region. Note: Large‐format versions of the plates for this report are available at: http://www.edwardsaquifer.org/documents/2000_Esquil in‐etal_1999HydrologicData‐Plates.pdf.
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Title: Edwards Aquifer Authority Hydrogeologic Data Report for 1999 - Plates
Description:
High-resolution fulll-size plates from "Edwards Aquifer Authority Hydrogeologic Data Report for 1999". Note: large-format printer required.
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Title: Edwards Aquifer Authority Hydrogeologic Report for 2001
Description:
Annual report for 2001 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrogeologic Report for 2002
Description:
Annual report for 2002 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2003
Description:
Annual report for 2003 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2004
Description:
Annual report for 2004 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2005
Description:
Annual report for 2005 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2006
Description:
Annual report for 2006 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2007
Description:
Annual report for 2007 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2008
Description:
Annual report for 2008 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2009
Description:
Annual report for 2009 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2010
Description:
Annual report for 2010 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2011
Description:
Annual report for 2011 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2012 / Report No. 13-01
Description:
Annual report for 2012 on recharge, discharge, precipitation, water levels and water quality in the Edwards Aquifer Balcones Fault Zone San Antonio Segment
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2013
Description:
Annual report for 2013 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2014
Description:
Annual report for 2014 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2015 - Groundwater
Description:
Annual report for 2015 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Report for 2015 - Precipitation
Description:
Annual report for 2015 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Authority Hydrologic Data Summary for 2007
Description:
2007 hydrologic data summary
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Title: Edwards Aquifer Authority Rain Gauge Analysis Study Report
Description:
Recommendations for optimizing placement of rain gauges in the Edwards Aquifer area
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Title: Edwards Aquifer Authority Synoptic Water Level Program 1999-2004 Report
Description:
1999-2004 synoptic water level study
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Title: Edwards Aquifer Authority Synoptic Water Level Program 2005-2009 Water Level Data
Description:
2005-2009 synoptic water level study
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Title: Edwards Aquifer Authority Technical Documents Project Phase I
Description:
Documentation of Phase I of the Edwards Aquifer Authority Technical Documents Project from 2011-2012
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Title: Edwards Aquifer Authority Technical Documents Project Phase II
Description:
Documentation of Phase II of the Edwards Aquifer Authority Technical Documents Project from 2012-2014
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Title: Edwards Aquifer Authority Well Plugging and Abandonment Study
Description:
Geophysical tests on an abandoned well to determine best method of achieving sealing of the annular space
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Title: Edwards Aquifer Bibliography through 2010
Description:
Bibliography of the Edwards Aquifer through 2010
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Title: Edwards Aquifer Ground-Water Divides Assessment, San Antonio Region, Texas
Description:
Hydrogeologic study on location of groundwater divides in Hays and Kinney Counties
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Title: Edwards Aquifer Hydrogeologic Report for 1993
Description:
Annual report for 1993 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Hydrogeologic Report for 1994
Description:
Annual report for 1994 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Hydrogeologic Report for 1995
Description:
Annual report for 1995 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Hydrogeologic Report for 1996
Description:
Annual report for 1996 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Hydrogeologic Report for 1996-Plates
Description:
Large-format plates for Edwards Aquifer Hydrogeologic Report for 1996. See companion document.
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Title: Edwards Aquifer Hydrogeologic Report for 1997
Description:
Annual report for 1997 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Hydrogeologic Report for 1997
Description:
Annual report for 1997 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Hydrogeologic Report for 1997-Plates
Description:
Large-format plates for Edwards Aquifer Hydrogeologic Report for 1997. See companion document.
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Title: Edwards Aquifer Hydrogeologic Report for 1998
Description:
Annual report for 1998 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Hydrogeologic Report for 2000
Description:
Annual report for 2000 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Hydrogeologic Status Report for 1992
Description:
Annual report for 1992 on recharge, discharge, water levels and water quality in the Edwards Aquifer San Antonio Region
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Title: Edwards Aquifer Parameter Estimation Project: Final Report
Description:
Revision 3 of the hydraulic conductivity model using spatial statistics and various hydrological data calibrated to steady-state hydraulic head measurements and partially calibrated to steady-state spring discharges, for manual calibration of the model and as a basis for fully automated calibrations. This study is included for historical value and may have been supplanted by more recent ones.
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Title: Edwards Aquifer Precipitation Enhancement Program Final Report 1999
Description:
Summary of the Edwards Aquifer Precipitation Enhancement Program for 1999
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Title: Edwards Aquifer Precipitation Enhancement Program Final Report 2000
Description:
Summary of the Edwards Aquifer Precipitation Enhancement Program for 2000
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Title: Edwards Aquifer Precipitation Enhancement Program Final Report 2001
Description:
Summary of the Edwards Aquifer Precipitation Enhancement Program for 2001
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Title: Edwards Aquifer Recharge Enhancement Project Phase IVA Nueces River Basin Final Report
Description:
Note: This report is included for its historical value and may have been replaced by more recent studies.
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Title: Edwards Aquifer Storage Assessment, Kinney County to Hays County, Texas
Description:
Core- and log-based stratigraphic study of permeability, porosity and storativity in the Edwards Aquifer
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Title: Edwards Aquifer System [Map]
Description:
Map of the Edwards Aquifer System, Balcones Fault Zone, San Antonio Segment
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Title: Edwards Underground Water District
Description:
General description of the Edwards Aquifer, and the mission and functions of the Edwards Underground Water District. Note: this document has been included for historical value.
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Title: Edwards Underground Water District Drought Management Plan
Description:
Trigger conditions and actions to manage the Edwards Aquifer under conditions of drought. Note: This document is included for historical value and may have been replaced by more recent documents, including the Habitat Conservation Plan.
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Title: Edwards Underground Water District strategic plan (1994-2004)
Description:
Goals and objectives for the Edwards Underground Water District from 1994-2004. Note: This document is included for its historical value and has been replaced by more recent ones.
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Title: Edwards Underground Water District Water Conservation Benchmark Study
Description:
Study to measure consumers' awareness and actions for water conservation. Note: This report is included for its historical value and may have been replaced by more recent studies.
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Title: Edwards Underground Water District, San Marcos Testing, Hays County, Texas
Description:
Archaeological test site at Spring Lake, San Marcos, TX excavated prior to more extensive water monitoring activity.
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Title: Edwards Underground Water District: Created to Conserve, Protect and Preserve the Edwards Aquifer
Description:
History and overview of the Edwards Aquifer and the Edwards Underground Water District
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Title: Edwards/Glen Rose Hydrologic Communication, San Antonio Region, Texas
Description:
Hydrogeological and modeling study of transmissivity between the Glen Rose and Edwards aquifers in the Cibolo Creek Basin and Guadalupe River
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Title: Effects of Brush Management on the Hydrologic Budget and Water Quality In and Adjacent to Honey Creek State Natural Area, Comal County, Texas, 2001-10
Description:
Effects of brush management on hydrologic budget and water quality. May not be generalizable to all locations. See Fact Sheet companion document of the same name.
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Title: Effects of Brush Management on the Hydrologic Budget and Water Quality In and Adjacent to Honey Creek State Natural Area, Comal County, Texas, 2001-10 [Fact Sheet]
Description:
Fact Sheet companion document to full report of the same name.
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Title: Enhanced Characterization and Representation of Flow through Karst Aquifers-Phase II Revision 1
Description:
Development and testing of the MODFLOW DCM version 2.0 model for karst aquifers
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Title: Environmental Tritium in the Edwards Aquifer Central Texas 1963-71
Description:
Analysis of tritium in 50 wells and springs in the San Antonio area
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Title: Evaluation of Acoustic Doppler Velocity Meters to Quantify Flow from Comal Springs and San Marcos Springs, Texas
Description:
Evaluation of acoustic Doppler velocity meters (ADVMs) in relation to stream gages to quantify flow from Comal and San Marcos Springs
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Title: Evaluation of Alternative Instream and Bay and Estuary Flow Criteria for Run-of-the-River Diversions / Technical Memorandum
Description:
Discussion of various concepts for a second generation of environmental flow criteria for the Guadalupe - San Antonio River Basin to be used in the Trans-Texas Water Program
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Title: Evaluation of Augmentation Methodologies in Support of In-Situ Refugia at Comal and San Marcos Springs, Texas
Description:
Evaluation of different augmentation methodologies to maintain habitats in Comal and San Marcos Springs during drought conditions
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Title: Evaluation of Stormwater Control Techniques and Programs
Description:
Note: This report is included for its historical value and may have been replaced by more recent studies.
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Title: Evaluation of the Aquifer and Springflow Impacts Associated with the Cibolo Creek Transfer Rules
Description:
Use of data and modeling to determine effects on springflow in Comal and San Marcos Springs from Cibolo Transfers (transfers of permits from Bexar to eastern counties)
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Title: Evaluation of the Availability of Additional Water Supplies from the Edwards Aquifer
Description:
Decision analysis of eight strategies for their utility in a possible adjustment of the Edwards Aquifer withdrawal cap
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Title: Evaluation of the Edwards Aquifer in Kinney and Uvalde Counties, Texas
Description:
Development of an updated conceptual model in the Edwards Aquifer for the Kinney County and Uvalde Pools and the relationship of the latter to the San Antonio Pool
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Title: Evaluation of the Option to Designate a Separate San Marcos Pool for Critical Period Management
Description:
Hydrogeologic relationships between nearby streams and rivers to springflow at San Marcos Springs
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Title: Evaluation of the Use of Remote-Sensing Data to Identify Crop Types and Estimate Irrigated Acreage, Uvalde and Medina Counties, Texas, 1989
Description:
Methods and results of using Landsat remote-sensing data to determine types of crops and volume of irrigation/pumpage in Uvalde and Medina Counties for 1989
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Title: Evapotranspiration - A Method of Disposing of Septic Tank Effluent
Description:
Feasibility study for evapotranspiration as an effective means of disposing septic tank effluent
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Title: Executive Summary of Water Availability Study for the Guadalupe and San Antonio River Basins
Description:
Note: This paper is included for its historical value but has been replaced by more recent studies. Summary of studies on proposed reservoirs on the Guadalupe and San Antonio Rivers.
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Title: Exploring Drought in the San Antonio Area Between 1700 and 1979
Description:
Using tree rings to analyze droughts for the San Antonio area between 1700 and 1979
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Title: Fauna of Wells Near the Saline Water line of the Edwards Aquifer, Texas
Description:
Zara Deep Aquifer Biota Study of Fauna of Wells Near the Saline Water line of the Edwards Aquifer
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Title: Field and Laboratory Tests of Passive Sampling Techniques
Description:
One of the objectives of the study was to compare the results between the five urban wells and the two rural wells. Only one rural sample contained PCE, and all the other detections were fuel-related compounds, in contrast to the frequent detections of PCE in the urban wells.
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Title: Fifth Biennial Report on the Effectiveness of the Edwards Aquifer Authority
Description:
Central Texas Water Advisory Committee for FYs 2004-2006, and recommendations for future actions
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Title: File Memorandum on Review of Water Quality Changes in Edwards Reservoir-Especially Near the Bad Water Line
Description:
File memorandum on review of water quality from monitoring wells near the bad water line through 1967 Note: Page-size and large-format size of original plate are at the end of the document.
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Title: Final report as required by the Endangered Species Program, Texas: grant no. E-38-HP: endangered and threatened species conservation: habitat conservation planning for the development of the Edwards Aquifer Authority habitat conservation plan
Description:
Summary of progress on development of the Habitat Conservation Plan (HCP) to protect the Comal and San Marcos spring ecosystems and mitigate any incidental take of listed species that would occur as a result of low spring flows, and Environmental Impact Statement (EIS) for description of the preferred alternative
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Title: Final Report for Deep Aquifer Biota Study of the Edwards Aquifer
Description:
Deep-aquifer biota study in five counties of the Edwards Aquifer
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Title: Final Report-2002/A Weather Resources Management Program/A Summary of Cloud Seeding Activities Conducted over Six Counties in South Texas During the Period 15 March-15 November 2002
Description:
Report on rain enhancement by the Southwest Texas Rain Enhancement Association for 2002
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Title: Fountain Darter Laboratory Study Repoductive Response to Parasites and Temperature Flucuations
Description:
Laboratory study of effects of temperature fluctuations and parasites on reproduction in the fountain darter
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Title: Geochemical and Isotopic Analyses of Waters Associated with the Edwards Limestone Aquifer, Central Texas
Description:
Inorganic chemical analyses of various Edwards Aquifer samples circa 1976 using new field methods
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Title: Geologic Framework and Hydrogeologic Characteristics of the Edwards Aquifer Outcrop, Comal County, Texas
Description:
Geologic and hydrogeologic description of the karstic limestone outcrops of the Edwards Aquifer Recharge Zone in Comal County, TX
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Title: Geologic Framework and Hydrogeologic Characteristics of the Edwards Aquifer Outcrop, Hays County, Texas
Description:
Geologic and hydrogeologic description of the karstic limestone outcrops of the Edwards Aquifer Recharge Zone in Comal County, TX
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Title: Geologic Framework and Hydrogeologic Characteristics of the Edwards Aquifer Outcrop, Medina County, Texas
Description:
Geologic and hydrogeologic description of the karstic limestone outcrops of the Edwards Aquifer Recharge Zone in Medina County, TX
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Title: Geologic Framework and Hydrogeologic Characteristics of the Edwards Aquifer, Uvalde County, Texas
Description:
Geology and hydrogeology of the Edwards Aquifer in Uvalde County, TX
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Title: Geology and Water Quality at Selected Locations in the San Antonio Area Texas, Progress Report, 1969
Description:
Surface geology and water quality monitoring in the San Antonio region in relation to development and most likely sources of pollution. Note: Page-size and large-format plate are at the end of the report.
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Title: Geophysical Survey to Determine the Depth and Lateral Extent of the Leona Aquifer and Evaluation of Discharge Through the Leona River Floodplain, South of Uvalde, Texas
Description:
Determination of groundwater flow regime for the Leona Formation aquifer in the Leona River floodplain
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Title: Government Canyon Geologic and Hydrologic Assessment
Description:
Government Canyon geologic and hydrologic assessment
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, 1955-62, San Antonio Area, Texas
Description:
First of annual reports on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1963
Description:
Annual report for 1963 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1964
Description:
Annual report for 1964 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1965
Description:
Annual report for 1965 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1966
Description:
Annual report for 1966 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1967
Description:
Annual report for 1967 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1968
Description:
Annual report for 1968 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1969
Description:
Annual report for 1969 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1970
Description:
Annual report for 1970 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1971
Description:
Annual report for 1971 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1972
Description:
Annual report for 1972 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1973
Description:
Annual report for 1973 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1974
Description:
Annual report for 1974 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1975
Description:
Annual report for 1975 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Discharge from the Edwards and Associated Limestones, San Antonio Area, Texas, 1976
Description:
Annual report for 1976 on discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Ground-Water Recharge to the Edwards and Associated Limestones, San Antonio Area, Texas, 1964
Description:
Report for 1964 on estimated recharge to the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Groundwater Level Monitoring Plan
Description:
Guidance for collecting groundwater data by the Edwards Aquifer Authority
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Title: Groundwater Quality Monitoring Plan Edwards Aquifer Authority
Description:
Groundwater quality management plan for the Edwards Aquifer Authority 2003-2006
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Title: Habitat conservation planning for development of the Edwards Aquifer Authority Habitat Conservation Plan: grant no. E-38-HP: grant program, Section 6 habitat conservation plan planning assistance
Description:
Summary of progress to 2005 on development of the Habitat Conservation Plan (HCP) to protect the Comal and San Marcos spring ecosystems and mitigate any incidental take of listed species that would occur as a result of low spring flows, and Environmental Impact Statement (EIS) for description of the preferred alternative
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Title: Helicopter Electromagnetic and Magnetic Survey Data and Maps, Northern Bexar County, Texas
Description:
Helicopter survey of electromagnetic and magnetic properties with hydrologic application around Northern Bexar County, TX
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Title: Helicopter Electromagnetic and Magnetic Survey Data and Maps, Seco Creek Area, Medina and Uvalde Counties, Texas
Description:
Helicopter survey of electromagnetic and magnetic properties with hydrologic application around the Valdina Farms sinkhole in Medina County, Texas
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Title: Helicopter Electromagnetic and Magnetic Survey Data and Maps, Seco Creek Area, Medina and Uvalde Counties, Texas - Plate
Description:
Full-size plate for "Helicopter Electromagnetic and Magnetic Survey Data and Maps, Seco Creek Area, Medina and Uvalde Counties, Texas". Note: Original size plate - need large-format printer.
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Title: Helotes Mulch Fire 2006 Tracing Groundwater Flow Using Natural Fluorescent Materials
Description:
With approximately 21 million gallons of water (LFCI, 2011) having been trained on the debris pile, the Helotes mulch fire effectively became a tracer test of huge proportions. It provided an opportunity for us to study the karst-related flow characteristics of the Edwards and Trinity aquifers. The fire-fighting water mobilized naturally fluorescing woody material and products of combustion that could be measured in groundwater using conventional fluorescence spectroscopy. Results revealed many of the characteristics of karst in both aquifers.
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Title: History of Water in the San Antonio River Valley
Description:
Colorful narrative history of the San Antonio River basin and the role of water in the location and development of San Antonio
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Title: HSPF Recharge Models for the San Antonio Segment of the Balcones Fault Zone of the Edwards Aquifer – Part 1
Description:
Development of complete contributing and recharge zones for the HSPF enhancement to MODFLOW from historical data on all nine drainage basins of the Edwards Aquifer Balcones Fault Zone San Antonio Segment
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Title: HSPF Recharge Models for the San Antonio Segment of the Balcones Fault Zone of the Edwards Aquifer – Part 2
Description:
Development of complete contributing and recharge zones for the HSPF enhancement to MODFLOW from historical data on all nine drainage basins of the Edwards Aquifer Balcones Fault Zone San Antonio Segment - Part 2
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Title: HSPF Recharge Models for the San Antonio Segment of the Balcones Fault Zone of the Edwards Aquifer – Part 3
Description:
Development of complete contributing and recharge zones for the HSPF enhancement to MODFLOW from historical data on all nine drainage basins of the Edwards Aquifer Balcones Fault Zone San Antonio Segment - Part 3
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Title: Hydrogeologic Data from a Study of the Freshwater Zone/Salinewater Zone Interface in the Edwards Aquifer, San Antonio Region, Texas
Description:
Initial hydrogeological study of the freshwater/saline water boundary and potential for saltwater intrusion in the Edwards Aquifer, Balcones Fault Zone, San Antonio Segment
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Title: Hydrogeologic Framework and Geochemistry of the Edwards Aquifer Saline-Water Zone, South-Central Texas
Description:
Geochemical study of the Edwards Aquifer saline zone in relation to location of downdip and geological faults
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Title: Hydrogeology, Hydrologic Budget and Water Chemistry of the Medina Lake Area, Texas
Description:
Assessment of the geology, hydrogeology and hydrology of Medina and Diversion Lakes and seepage into the Edwards / Trinity aquifers
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Title: Hydrologic Investigations of the Edwards and Associated Limestones in the San Antonio Area, Texas Progress Report, 1970-71
Description:
Summary of hydrochemical studies done on the Edwards Aquifer by the US Geological Survey for the Edwards Underground Water District in fiscal year 1971
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Title: Investigation of the Fresh/Saline Water Interface in the Edwards Aquifer in New Braunfels and San Marcos, Texas - Appendices
Description:
Attempts to define the freshwater/saline water boundary and its movement in the New Braunfels/San Marcos area from monitoring well data - Appendices
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Title: Investigation of the Fresh/Saline Water Interface in the Edwards Aquifer in New Braunfels and San Marcos, Texas - Report
Description:
Attempts to define the freshwater/saline water boundary and its movement in the New Braunfels/San Marcos area from monitoring well data - Report
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Title: Investigation of the Fresh/Saline Water Interface in the Edwards Aquifer in New Braunfels and San Marcos, Texas Executive Summary
Description:
Attempts to define the freshwater/saline water boundary and its movement in the New Braunfels/San Marcos area from monitoring well data.
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Title: Investigation of Volatile Organic Compounds in Groundwater Uvalde, Texas Edwards Underground Water District Field Activities from January 1984 through April 1988
Description:
Survey of groundwater to determine the source of tetrachloroethylene (PCE) in the Edwards Aquifer near the Uvalde, TX airport
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Title: Leak Detection Survey Report for Bexar Metropolitan Water District: San Antonio, Texas, February 10, 1992-January 8, 1993
Description:
Leak detection and location survey report for Bexar Metropolitan Water District, San Antonio, 1993. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection Survey Report for Southwest Texas State University, San Marcos: June 14, 1993-June 18, 1993
Description:
Leak detection and location survey report for Southwest Texas State University, June 14-18, 1993. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection Survey Report for the city of Lytle
Description:
Leak detection and location survey report for City of Lytle, 1992. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection Survey Report for the city of Schertz: Schertz, Texas, January 11, 1993 - April 2, 1993
Description:
Leak detection and location survey report for City of Schertz, 1993. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection Survey Report for the City of Uvalde, Texas, January 11, 1993-April 26, 1993
Description:
Leak detection and location survey report for City of Uvalde, 1993. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for Bexar Metropolitan Water District, northeast/northwest San Antonio, Texas: March 21, 1994-February 24, 1995
Description:
Leak detection/location survey report for Bexar Metropolitan Water District, March 21, 1994-February 24, 1995. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for County Line Water Supply Corporation Caldwell & Hays Counties, Texas
Description:
Leak detection and location survey report for County Line Water Supply Corporation, 1994. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for East Medina County Water Supply Corporation, August 10, 1995-October 10, 1995
Description:
Leak detection and location survey report for East Medina County Water Supply Corporation, August 10, 1995-October 10, 1995. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for Fort Sam Houston, Bexar County, Texas, July 22, 1993-February 4, 1994
Description:
Leak detection/location survey report for Fort Sam Houston, July 22, 1993 - February 4, 1994. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for Green Valley Special Utility District, May 12, 1993-October 29, 1993
Description:
Leak detection and location survey report for City of Leon Valley May 4, 1993-August 1993. Note similar report for June 15, 1993-July 2, 1993. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for Lackland Air Force Base, Bexar County, Texas, February 27, 1995 - August 8, 1995
Description:
Leak detection and location survey report Lackland Air Force Base, 1995. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for San Antonio water system service area within the city limits of the city of Leon Valley, June 15, 1993-July 2, 1993
Description:
Leak detection and location survey report for City of Leon Valley, June 15, 1993-July 2, 1993. Note similar report for May 4, 1993-August 1993, a time period included in this report. This function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for Southwest Texas State University, Hays County, Texas, April 22, 1996-July 26, 1996
Description:
Leak detection and location survey report for Southwest Texas State University, April 22, 1996-July 26, 1996. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for Springs Hill Water Supply Corporation, January 31, 1994-March 28, 1994
Description:
Leak detection/location survey report for Springs Hill Water Supply Corp, Seguin, Guadalupe County, January 31, 1994-March 28, 1994. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for the City of Cibolo, Texas, November 2, 1993-December 2, 1993
Description:
Leak detection and location survey report for City of Cibolo,Texas, November 2, 1993-December 2, 1993. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for the City of Converse, Bexar County, Texas, July 5, 1995-October 24, 1995
Description:
Leak detection and location survey report for City of Converse, 1995 (published in 1996). Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for the City of Garden Ridge, Comal County, Texas: March 1, 1996-April 30, 1996
Description:
Leak detection and location survey report for City of Garden Ridge, March 1, 1996-April 30, 1996. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for the City of Kirby, Bexar County, Texas: May 1, 1995-May 16, 1995, June 6, 1995-June 30, 1995, October 25, 1995-December 12, 1995
Description:
Leak detection/location survey report for City of Kirby, May 1, 1995-May 16, 1995, June 6, 1995-June 30, 1995, October 25, 1995-December 12, 1995. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for the City of Kyle, May 16, 1995-June 5, 1995
Description:
Leak detection and location survey report for City of Kyle, TX from May 16, 1995-June 5, 1995. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for the City of Leon Valley, Texas, city of Leon Valley water system, May 4, 1993-August 1993
Description:
Leak detection and location survey report for City of Leon Valley May 4, 1993-August 1993. Note similar report for June 15, 1993-July 2, 1993. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for the City of Live Oak / Live Oak, Texas March 23, 1995-April 7, 1995
Description:
Leak detection and location survey report for City of Live Oak, 1995. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for the City of Marion: May 1, 1996-May 31, 1996
Description:
Leak detection and location survey report for City of Marion, TX, May 1-31, 1996. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Leak Detection/Location Survey Report for the Fairco Water Company, Bexar County, Texas: December 13, 1995-March 8, 1996
Description:
Leak detection and location survey report for Fairco Watrr Company, 1996. Note: this function was taken over by the San Antonio Water System in 2006.
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Title: Maps Showing Outcrops of the Edwards and Associated Limestones in the Principal Recharge Area of the Edwards Aquifer in Bexar County, Texas [6 maps]
Description:
Six topographic maps of the Edwards Aquifer Recharge Zone, scale 1:24,000. Camp Bullis Quadrangle, Bulverde Quadrangle, Helotes Quadrangle, Longhorn Quadrangle, Castle Hills Quadrangle, San Geronimo Quadrangle. Note: Both letter-size and full-size maps are included.
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Title: Measuring Floodplain Hydraulics of Seco Creek and Medina River Where They Overlie the Edwards Aquifer - Final Report
Description:
Study of the hydraulic relationships between Seco Creek, the Medina River, and the Edwards Aquifer
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Title: Measuring Floodplain Hydraulics of the Frio River Where it Overlies the Edwards Aquifer
Description:
Structural and hydrogeological survey of the Frio River to determine if water table underflow contributes to the water budget of the Edwards Aquifer Recharge Zone
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Title: Medina Lake Hydrology Study
Description:
Hydrologic and hydraulic analyses for the Medina Lake and Medina Diversion Lake reservoir system
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Title: Method of Estimating Natural Recharge to the Edwards Aquifer in the San Antonio Area, Texas
Description:
US Geological Survey method of estimating recharge in the Edwards Aquifer Balcones Fault Zone San Antonio Segment
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Title: Methodology for Calculating Specific-Storage Values in the Edwards (Balcones Fault Zone) Aquifer, Central Texas, Using Seismic Efficiencies
Description:
Description of a method to estimate storativity of the Edwards Aquifer, Balcones Fault Zone, San Antonio Segment based on seismic efficiency calculations (transient changes in hydrodynamic pressure after seismic events)
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Title: Needs Assessment for Ground-Water Management Model for the Edwards Aquifer (San Antonio Section)
Description:
Discussion of needs and limitations in developing a model of the Edwards Aquifer, Balcones Fault Zone, San Antonio Segment Note: This report is included for its historical value but may have been replaced by more recent studies.
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Title: New Braunfels-San Marcos Crystal Clear Surface Water Development
Description:
Request for funding from the Edwards Underground Water District for a surface water source and treatment plant for New Braunfels, Crystal Clear and San Marcos, TX. Note: This document is included for its historical value.
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Title: New Braunfels-San Marcos Surface Water Development
Description:
Discussion of developing surface water as a supplementary water source for New Braunfels and San Marcos Note: This document is included for its historical value.
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Title: North Bexar County Water Resources Study for the Edwards Underground Water District-Executive Summary and Volume I Ground Water
Description:
Study of the Upper, Middle, and Lower Trinity aquifers and nearby surface waters as potential sources of fresh water for Northern Bexar County in the future. Notes: This report is included for its historical value and may have been replaced by more recent studies. Page-size version of the plate is at the end of the report. Large-format version of the original plate is 216 MB. Available upon request at info@edwardsaquifer.org
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Title: Operations Report on a Cloud Seeding Program for the Edwards Underground Water District NAWC WM-86-6
Description:
Summary of the weather modification program by North American Weather Consultants for the Edwards Underground Water District in 1986
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Title: Optimization Technical Studies in Support of the Edwards Aquifer Optimization Program
Description:
Summary of proposed optimization studies for the EAA. Note: Is outdated. Has been replaced by more recent modeling studies and water plans.
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Title: Optimum Streamflow and Rainfall Gauging Site Location Study As Part of Real Time Data Collection Network Assessment
Description:
Streamflow and rainfall optimum gauging study and recommendations for improving accuracy of recharge estimates to the Edwards Aquifer
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Title: Phase I Edwards Underground Water District Storage-Release Recharge Facility Evaluation
Description:
Engineering and simulation study to evaluate two potential sites for storage/release reservoirs on the Frio and Dry Frio Rivers. Note: This report is included for its historical value and may have been replaced by more recent studies.
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Title: Pilot Recharge Models of the Nueces and Blanco River Basins
Description:
Pilot study to develop HSPF improvement of the MODFLOW study for recharge in the Blanco and Nueces River Basins
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Title: Potential for Updip Movement of Salinewater in the Edwards Aquifer, San Antonio, Texas
Description:
Modeling the shift of the freshwater-saline water interface under various conditions over a 10-year period
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Title: Preliminary Draft of Watershed Work Plan for Watershed Protection and Flood Prevention Seco Creek Watershed Medina, Bandera and Uvalde Counties, Texas
Description:
Preliminary assessment for methods and costs of flood prevention in the Seco Creek Watershed Note: This report is included for its historical value and may have been replaced by more recent studies.
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Title: Preliminary Feasibility Assessment of Edwards Aquifer Saline Water Treatment and Use
Description:
Feasibility of desalination from the Edwards Aquifer for public drinking water
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Title: Preliminary Report of Biological Investigation - Valdina Farms Sinkhole-Medina Co., Texas
Description:
Documentation of fauna in Valdina Farms Sinkhole, Medina County, 1977
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Title: Programmatic Assessment: Proposed Rules 31 TAC Chapters 701, 702, 703, 705, 707, 709, 711 – Part 1
Description:
Part 1 of report on interviews of stakeholders and analysis of how to implement the Edwards Authority Act
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Title: Programmatic Assessment: Proposed Rules 31 TAC Chapters 701, 702, 703, 705, 707, 709, 711 – Part 2
Description:
Part 2 of report on interviews of stakeholders and analysis of how to implement the Edwards Authority Act
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Title: Programmatic Assessment: Proposed Rules 31 TAC Chapters 701, 702, 703, 705, 707, 709, 711 – Part 3
Description:
Part 3 of report on interviews of stakeholders and analysis of how to implement the Edwards Authority Act
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Title: Proposed 10-Year Plan for Continuation of Hydrologic Studies of the Edwards Aquifer, San Antonio Area, Texas
Description:
Ten-year research priorities for the Edwards Aquifer Balcones Fault Zone San Antonio Segment conducted jointly by the Edwards Underground Water District and the U.S. Geological Survey
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Title: Quality of Stormwater Runoff from an Urbanizing Watershed and a Rangeland Watershed in the Edwards Aquifer Recharge Zone, Bexar and Uvalde Counties, Texas, 1996-98
Description:
Water quality study on stormwater runoff in an urbanizing vs rural area of the Edwards Aquifer Recharge Zone
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Title: Quantity and Quality of Low Flow in the Hondo Creek Basin, Texas March 27-28, 1968
Description:
Low-flow study of Hondo Creek Basin, TX March 27-28, 1968
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Title: Re-Conceptualizing the Edwards Aquifer Authority Recharge Program: Staff Recommendations to Optimize and Protect the Edwards Aquifer
Description:
Recharge is defined in the EAA Act as: Increasing the supply of water to the aquifer by naturally occurring channels or artificial means. Based on this definition, the EAA recharge program previously consisted of four recharge dams initially sponsored by the EUWD and Medina County Commissioners Court until calendar year 2004, when participation in the regional Precipitation Enhancement Program (PEP) was added to the program.
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Title: Recharge and Recirculation / Edwards Aquifer Optimization Program Phase III / IV Report Final
Description:
Continued and final analyses using improved flow model and recent agency rules for optimizing recharge and streamflow in the Edwards Aquifer
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Title: Recharge Enhancement Study Guadalupe-San Antonio River Basin Volume I-Executive Summary
Description:
Development of the GSA Model to estimate recharge to the Edwards Aquifer from the San Antonio and Guadalupe River basins and effects of additional recharge structures
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Title: Recharge Enhancement Study Guadalupe-San Antonio River Basin Volume II-Technical Report
Description:
Technical Report for Recharge Enhancement Study Guadalupe-San Antonio River Basin. See companion documents.
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Title: Recharge Enhancement Study Guadalupe-San Antonio River Basin Volume III-Appendices
Description:
Appendices to Recharge Enhancement Study Guadalupe-San Antonio River Basin. See companion documents.
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Title: Recharge to and Discharge from the Edwards Aquifer in the San Antonio Area, Texas, 1998
Description:
Short report summarizing recharge and discharge to and from the Edwards Aquifer from 1934-1998
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Title: Records of Ground-Water Recharge and Discharge for the Edwards Aquifer in the San Antonio Area, Texas, 1934-77
Description:
Annual report for 1977 on recharge and discharge from the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Records of Ground-Water Recharge, Discharge, Water Levels and Chemical Quality of Water for the Edwards Aquifer in the San Antonio Area, Texas, 1934-78
Description:
Title page: Records of Ground-water Recharge and Discharge, 1934-78; Water Levels, 1975-78; and Chemical Quality of Water, 1977-78, for the Edwards Aquifer in the San Antonio Area, Texas. Annual hydrologic report issued by the Edwards Underground Water District.
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Title: Records of Ground-Water Recharge, Discharge, Water Levels and Chemical Quality of Water for the Edwards Aquifer in the San Antonio Area, Texas, 1934-79.
Description:
Title page: Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1934-79. Annual hydrologic report issued by the Edwards Underground Water District.
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Title: Records of Ground-Water Recharge, Discharge, Water Levels and Chemical Quality of Water for the Edwards Aquifer in the San Antonio Area, Texas, 1934-80.
Description:
Title page: Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1934-80. Annual hydrologic report issued by the Edwards Underground Water District.
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Title: Records of Ground-Water Recharge, Discharge, Water Levels and Chemical Quality of Water for the Edwards Aquifer in the San Antonio Area, Texas, 1934-81.
Description:
Title page: Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1981, with 1934-81 Summary. Annual hydrologic report issued by the Edwards Underground Water District.
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Title: Records of Ground-Water Recharge, Discharge, Water Levels and Chemical Quality of Water for the Edwards Aquifer in the San Antonio Area, Texas, 1934-82.
Description:
Title page: Compilation of Hydrologic Data for the Edwards Aquifer, San Antonio Area, Texas, 1982, with 1934-82 Summary. Annual hydrologic report issued by the Edwards Underground Water District.
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Title: Records of Precipitation, Aquifer Head, and Ground-Water Discharge to the Edwards and Associated Limestones, San Antonio Area, Texas, 1963
Description:
Annual report for 1963 on precipitation, aquifer levels, and recharge to the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Records of Precipitation, Aquifer Head, and Ground-Water Recharge to the Edwards and Associated Limestones, 1960-62, San Antonio Area, Texas
Description:
Annual report for 1960-62 on precipitation, aquifer levels, and recharge to the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Records of Precipitation, Aquifer Head, and Ground-Water Recharge to the Edwards and Associated Limestones, San Antonio Area, Texas, 1965
Description:
Annual report for 1965 on precipitation, aquifer levels, and recharge to the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Records of Precipitation, Aquifer Head, and Ground-Water Recharge to the Edwards and Associated Limestones, San Antonio Area, Texas, 1966
Description:
Annual report for 1966 on precipitation, aquifer levels, and recharge to the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Records of Precipitation, Aquifer Head, and Ground-Water Recharge to the Edwards and Associated Limestones, San Antonio Area, Texas, 1967
Description:
Annual report for 1967 on precipitation, aquifer levels, and recharge to the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Records of Precipitation, Aquifer Head, and Ground-Water Recharge to the Edwards and Associated Limestones, San Antonio Area, Texas, 1968
Description:
Annual report for 1968 on precipitation, aquifer levels, and recharge to the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Records of Precipitation, Aquifer Head, and Ground-Water Recharge to the Edwards and Associated Limestones, San Antonio Area, Texas, 1969
Description:
Annual report for 1969 on precipitation, aquifer levels, and recharge to the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Records of Precipitation, Aquifer Head, and Ground-Water Recharge to the Edwards and Associated Limestones, San Antonio Area, Texas, 1970
Description:
Annual report for 1970 on precipitation, aquifer levels, and recharge to the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Records of Precipitation, Aquifer Head, and Ground-Water Recharge to the Edwards and Associated Limestones, San Antonio Area, Texas, 1971
Description:
Annual report for 1971 on precipitation, aquifer levels, and recharge to the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Records of Precipitation, Aquifer Head, and Ground-Water Recharge to the Edwards and Associated Limestones, San Antonio Area, Texas, 1972-73
Description:
Annual report for 1972-73 on precipitation, aquifer levels, and recharge to the Edwards Aquifer issued by the Edwards Underground Water District
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Title: Records of Wells and Springs, San Antonio Area, Texas
Description:
Records of wells and springs in the Edwards Aquifer, Balcones Fault Zone, San Antonio Segment, 1956-1968
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Title: Refining the Conceptual Model for Flow in the Edwards Aquifer—Characterizing the Role of Fractures and Conduits in the Balcones Fault Zone Segment
Description:
Hydrogeologic study using existing data on role of fractures and conduits in groundwater flow in the recharge and artesian zones of the Edwards Aquifer Balcones Fault Zone
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Title: Regional Distribution of Permeability in the Edwards Aquifer
Description:
Quantitative distribution of various factors controlling permeability and analysis of geographic and geologic relationships in the Edwards aquifer. Note: Large-format versions of the plates for this report are available in a companion document.
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Title: Regional Distribution of Permeability in the Edwards Aquifer - Plates
Description:
Large-format versions of the plates for Regional Distribution of Permeability in the Edwards Aquifer. See companion document.
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Title: Regional Specific Yield of the Edwards and Associated Limestones in the San Antonio, Texas Area
Description:
Regional specific yield of the San Antonio Segment of the Edwards Aquifer for 1958-1966
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Title: Regional Water Resources Plan for the Edwards Aquifer
Description:
Insight into the joint planning process between the City of San Antonio and the Edwards Underground Water District for preserving quality and quantity of water in the Edwards Aquifer. Note: This report is included for its historical value and may have been replaced by more recent studies.
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Title: Regional Water Supply Planning Study - Phase I Nueces River Basin Volume I - Executive Summary
Description:
Note: This report is included for its historical value and may have been replaced by more recent studies. Executive Summary of 1991 water supply plan for the Nueces River Basin emphasizing construction of recharge structures (dams and reservoirs)
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Title: Regional Water Supply Planning Study - Phase I Nueces River Basin Volume II - Technical Report
Description:
Note: This report is included for its historical value and may have been replaced by more recent studies. Technical study for 1991 water supply plan for the Nueces River Basin emphasizing construction of recharge structures (dams and reservoirs)
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Title: Regional Water Supply Planning Study - Phase I Nueces River Basin Volume III - Appendices
Description:
Note: This report is included for its historical value and may have been replaced by more recent studies. Appendices for 1991 water supply plan for the Nueces River Basin emphasizing construction of recharge structures (dams and reservoirs)
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Title: Regional Water Supply Planning Study Phase III-Recharge Enhancement-Nueces River Basin
Description:
Analysis of nineteen proposed recharge structures for the Nueces River Basin with respect to cost and environmental concerns. Note: This document was included for its historical value but may have been superseded by more recent studies.
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Title: Report of the Technical Data Review Panel on the Water Resources of the South Central Texas Region
Description:
Assessment and gap analysis of the Edwards Underground Water District Technical Data Review Panel on historical data for water use, water quality, and water supply Note: This report is included for its historical value and may have been replaced by more recent studies.
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Title: Report on the Edwards Aquifer San Antonio Region, Texas
Description:
Review of geology, hydrogeology, recharge and pumpage of the Edwards Aquifer, Balcones Fault Zone, San Antonio Segment Note: This report is included for its historical value and may have been replaced by more recent studies.
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Title: Report on the Effectiveness of the Edwards Aquifer Authority
Description:
Assessment of the effectiveness of the Edwards Aquifer Authority by the South Central Texas Water Advisory Committee with respect to measures established in 2008
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Title: Review of Hydrocarbon Transmission Lines Crossing the Edwards Underground Reservoir
Description:
Risk assessment on the likelihood of leaks from oil pipelines over the Edwards Aquifer
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Title: Robust Representation of Dry Cells in MODFLOW
Description:
Documentation and testing of MODFLOW-NR to improve method for dealing with dry cells in modeling the Edwards Aquifer
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Title: San Antonio & Guadalupe River Basins Study (Report to US Congress)
Description:
Letter to US Congress from directors of various water entities in Central Texas, concerning historical and future use of water and need for Federal funding to ensure adequate supplies. Notes: This report is included for its historical value and may have been replaced by more recent studies. Page-size and large-format plates are at the end of the document.
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Title: San Antonio and Bexar County, Texas Report on Reclamation and Re-Use of Municipal Wastewater
Description:
Feasibility study on possible uses of reclaimed wastewater in Bexar and Medina Counties and impact on withdrawal from and recharge to the Edwards Aquifer Note: This report is included for its historical value and may have been superseded by more recent studies.
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Title: San Antonio Regional Water Resource Study
Description:
Analysis of regional water needs from 1980-2040. Note: This report is included for its historical value and may have been replaced by more recent studies.
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Title: San Antonio Regional Water Resource Study-Summary
Description:
Non-technical discussion of various alternatives for ensuring water supply for the greater San Antonio region through 2040, a 60-year horizon. Note: This report is included for its historical value and may have been superseded by more recent studies.
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Title: Simulated Impacts Associated with the Cibolo Creek Transfers Using MODFLOW-NR and Senate Bill 3 Assumptions
Description:
Tests of MODFLOW-NR and Senate Bill 3 assumptions on springflow in the Edwards Aquifer Balcones Fault Zone San Antonio Segment
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Title: Soil Gas Survey and Soil Sample Analyses of Former Gensco, Inc Site and Properties Adjacent to Taylor Slough Uvalde, Texas / Edwards Underground Water District Field Investigation July 1988 through October 1988
Description:
Report on field study of volatile organic compound (VOC) contaminants in soil at the former Gensco, Inc site in Uvalde, TX
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Title: South Central Texas Region 2000 Water Needs Assessment
Description:
Note: This report is included for historical value but has been replaced by the Texas Water Plan. Summaries of various sources of water, their costs, and projected needs of each county and jurisdiction by use.
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Title: South Central Texas Regional Water Planning Area 2001 Regional Water Plan Volume I Executive Summary and Regional Water Plan-Part 1
Description:
Executive Summary and Water Plan for the 2001 South Central Texas Regional Water Plan – Part 1. Note: This report is included for its historical value but was replaced by the 2006 South Central Texas Regional Water Plan, the 2011 South Central Texas Regional Water Plan, and eventually by the Texas Water Plan.
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Title: South Central Texas Regional Water Planning Area 2001 Regional Water Plan Volume I Executive Summary and Regional Water Plan-Part 2
Description:
Executive Summary and Water Plan for the 2001 South Central Texas Regional Water Plan – Part 2. Note: This report is included for its historical value but was replaced by the 2006 South Central Texas Regional Water Plan, the 2011 South Central Texas Regional Water Plan, and eventually by the Texas Water Plan.
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Title: South Central Texas Regional Water Planning Area 2001 Regional Water Plan Volume II Technical Evaluations of Alternative Regional Water Plans
Description:
Volume II of three volumes of the 2001 South Central Texas Regional Water Plan. Note: This report is included for its historical value but was replaced by the 2006 South Central Texas Regional Water Plan, the 2011 South Central Texas Regional Water Plan, and eventually by the Texas Water Plan.
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Title: South Central Texas Regional Water Planning Area 2001 Regional Water Plan Volume III Technical Evaluations of Water Supply Options - Part 1
Description:
Part 1 of Volume III of three volumes of the 2001 South Central Texas Regional Water Plan. Note: This report is included for its historical value but was replaced by the 2006 South Central Texas Regional Water Plan, the 2011 South Central Texas Regional Water Plan, and eventually by the Texas Water Plan.
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Title: South Central Texas Regional Water Planning Area 2001 Regional Water Plan Volume III Technical Evaluations of Water Supply Options - Part 2
Description:
Part 2 of Volume III of three volumes of the 2001 South Central Texas Regional Water Plan. Note: This report is included for its historical value but was replaced by the 2006 South Central Texas Regional Water Plan, the 2011 South Central Texas Regional Water Plan, and eventually by the Texas Water Plan.
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Title: South Central Texas Regional Water Planning Area 2006 Regional Water Plan Volume I Executive Summary and Regional Water Plan
Description:
Volume 1 of the 2006 South Central Texas Regional Water Plan. Note: This report is included for its historical value but has been replaced by the 2011 South Central Texas Regional Water Plan, and ultimately by the Texas Water Plan. Note changes in cover letter.
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Title: South Central Texas Regional Water Planning Area 2011 Regional Water Plan Volume I Executive Summary and Regional Water Plan
Description:
Volume 1 of the 2011 South Central Texas Regional Water Plan. Note: This report is included for its historical value but has been replaced by the Texas Water Plan.
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Title: South Medina County Observation Well Project
Description:
Drilling and evaluation of a new test well in South Medina County to refine the location of the freshwater / saline water interface in the Edwards Aquifer interface between San Antonio and Uvalde, Texas
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Title: South Texas Weather Modification Association 2002 Report
Description:
Report of the Edwards Aquifer Authority weather modification program for 2002
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Title: South Texas Weather Modification Association EAA Target Area 2003 Report
Description:
Report of the Edwards Aquifer Authority weather modification program for 2003
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Title: South Texas Weather Modification Association Edwards Aquifer Authority Target Area 2004 Report
Description:
Report of the Edwards Aquifer Authority weather modification program for 2004
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Title: South Texas Weather Modification Association Edwards Aquifer Authority Target Area 2005 Report
Description:
Report of the Edwards Aquifer Authority weather modification program for 2005
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Title: South Texas Weather Modification Association Edwards Aquifer Authority Target Area 2006 Report
Description:
Report of the Edwards Aquifer Authority weather modification program for 2006
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Title: South Texas Weather Modification Association Edwards Aquifer Authority Target Area 2007 Report
Description:
Report of the Edwards Aquifer Authority weather modification program for 2007
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Title: South Texas Weather Modification Association Edwards Aquifer Authority Target Area 2008 Report
Description:
Weather modification program by South Texas Weather Modification Association for the Edwards Aquifer Authority in 2008
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Title: South Texas Weather Modification Association Edwards Aquifer Authority Target Area 2009 Report
Description:
Weather modification program by South Texas Weather Modification Association for the Edwards Aquifer Authority in 2009
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Title: Southwest Texas Rain Enhancement Association 2003 EAA Final Report
Description:
Report of the Edwards Aquifer Authority weather modification program for 2003 in Uvalde County
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Title: Southwest Texas Rain Enhancement Association 2004 Edwards Aquifer Authority Final Report
Description:
Report of the Edwards Aquifer Authority weather modification program for 2004 in Uvalde County
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Title: Southwest Texas Rain Enhancement Association 2005 Edwards Aquifer Authority Final Report
Description:
Report of the Edwards Aquifer Authority weather modification program for 2005 in Uvalde and Medina Counties
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Title: Southwest Texas Rain Enhancement Association 2006 Edwards Aquifer Authority Final Report
Description:
Report of the Edwards Aquifer Authority weather modification program for 2006 in Uvalde, Medina and Bandera Counties
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Title: Southwest Texas Rain Enhancement Association 2007 Edwards Aquifer Authority Final Report
Description:
Report of the Edwards Aquifer Authority weather modification program for 2007 in Uvalde County
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Title: Southwest Texas Rain Enhancement Association 2008 Edwards Aquifer Authority Final Report
Description:
Weather modification program by Southwest Texas Rain Enhancement Association for the Edwards Aquifer Authority in 2008
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Title: Southwest Texas Rain Enhancement Association 2009 Edwards Aquifer Authority Final Report
Description:
Weather modification program by Southwest Texas Rain Enhancement Association for the Edwards Aquifer Authority in 2009
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Title: Staff report to Board of Directors of the Edwards Underground Water District: Urban Development on the Edwards Aquifer Recharge Zone
Description:
EUWD staff recommendations to the EUWD Board regarding potential cumulative impact of development over the Edwards Aquifer Recharge Zone
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Title: Statistical Analysis of Water-Level, Springflow and Streamflow Data for the Edwards Aquifer in South-Central Texas
Description:
Development of data-based simple and multiple linear regression equations for estimating water levels, springflow and streamflow in the San Antonio region of the Edwards Aquifer
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Title: Statistical Summary of Water-Quality Data Collected from Selected Wells and Springs in the Edwards Aquifer Near San Antonio, Texas
Description:
Compilation and descriptive statistics of water contaminants monitored in the Edwards Aquifer, Balcones Fault Zone, San Antonio Segment, from 1973-1982
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Title: Stormwater Runoff for Selected Watersheds in the Edwards Aquifer Recharge Zone, Bexar County, Texas, 1996-98
Description:
Comparison of water quality in stormwater runoff from five watersheds in the Edwards Aquifer Balcones Fault Zone San Antonio Segment Recharge Zone
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Title: Strategic Plan 2002-2006
Description:
Strategic Plan for the Authority in the period 2002-2006, including research plans. Note: This document was included for its historical value and has been superseded by more recent studies.
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Title: Streamflow Conditions in the Guadalupe River Basin, South-Central Texas, Water Years 1987-2006-An Assessment of Streamflow Gains and Losses and Relative Contribution of Major Springs to Streamflow
Description:
Use of streamflow and springflow data to estimate contribution of springflow from Comal, San Marcos and Hueco Springs to streamflow in the Guadalupe River Basin
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Title: Structural Controls on the Edwards Aquifer/Trinity Aquifer Interface in the Camp Bullis Quadrangle, Texas
Description:
Structural analyses for geologic framework model of the area around the intersection of the Edwards and Trinity Aquifers
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Title: Structural Controls on the Edwards Aquifer/Trinity Aquifer Interface in the Helotes Quadrangle, Texas
Description:
Structural analyses for geologic framework model of the Helotes Quadrangle around the intersection of the Edwards and Trinity Aquifers
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Title: Structural mapping of the Edwards Aquifer in eastern and central Uvalde County, Texas, using seismic, well and outcrop data
Description:
Structural mapping of the Edwards Aquifer in eastern and central Uvalde County, Texas, using seismic, well and outcrop data. Work performed under contract with the EAA by Thomas E. Ewing, Frontera Exploration Consultants; May 24, 2005
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Title: Suggested Design and Construction of Edwards Aquifer Wells
Description:
Guide for domestic well owners. Note: This document is included for historical interest and may have been replaced by more recent guidelines.
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Title: Summary Information Regarding Historical Edwards Aquifer Recharge, Aquifer Modeling and Recharge Enhancement Projects
Description:
Compilation of historical reports by HDR Engineering on recharge and modeling of the Edwards Aquifer Balcones Fault Zone San Antonio Segment
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Title: Survey Report on Edwards Underground Reservoir Guadalupe, San Antonio and Nueces Rivers and Tributaries, Texas. Volume 1 Main Report
Description:
Note: This report is included for its historical value and may have been replaced by more recent studies. Volume 1 of survey by the US Army Corps of Engineers and the Edwards Underground Water District, emphasizing possible locations for reservoirs and containment systems.
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Title: Survey Report on Edwards Underground Reservoir Guadalupe, San Antonio and Nueces Rivers and Tributaries, Texas. Volume 2 Appendices I, II, IV, VI
Description:
Note: This report is included for its historical value and may have been replaced by more recent studies. Volume 2 (Appendices I, II, IV, VI ) of survey by the US Army Corps of Engineers and the Edwards Underground Water District, emphasizing possible locations for reservoirs and containment systems.
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Title: Survey Report on Edwards Underground Reservoir Guadalupe, San Antonio and Nueces Rivers and Tributaries, Texas. Volume 3 Appendix III Geology Appendix V Economic Base Study Appendix VI Recreation and Wildlife
Description:
Note: This report is included for its historical value and may have been replaced by more recent studies. Volume 3 (Appendix III Geology Appendix V Economic Base Study Appendix VI Recreation and Wildlife) of survey by the US Army Corps of Engineers and the Edwards Underground Water District, emphasizing possible locations for reservoirs and containment systems.
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Title: Technical Assessments in Support of the Edwards Aquifer Science Committee "J Charge" Flow Regime Evaluation for the Comal and San Marcos River Systems
Description:
Modeling for critical flow requirements to protect endangered species in the Comal and San Marcos Rivers
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Title: The Abbreviated Water Conservation Working Handbook
Description:
An abbreviated version of the more comprehensive Water Conservation Working Handbook. Used by Water Conservation Task Force Committees throughout the Edwards Underground Water District, the complete Working Handbook promotes the development and use of new technologies and practices that improve water use efficiency. Note: This document is included for historical value but may have been superseded by more recent reports.
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Title: The Edwards Aquifer Extremely Productive, but...
Description:
Semi-technical description of the Edwards aquifer and considerations for its use and preservation for the general public and policy-makers
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Title: The Edwards Underground Reservoir and the Edwards Underground Water District
Description:
General description of the Edwards Aquifer and current concerns and acts of regulatory agencies in 1975. This document is included for its historical value and information may no longer be current.
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Title: The Edwards Underground Reservoir and the Edwards Underground Water District: Uvalde, Medina, Bexar, Comal and Hays Counties
Description:
General description of the Edwards Aquifer and the Edwards Underground Water District. Note: No cover page. This document is included for its historical value and has been replaced by more recent ones.
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Title: The Edwards Underground Reservoir [Trifold Brochure and Map]
Description:
Map and summary of the Edwards Aquifer and Edwards Underground Water District. Note: this information is no longer current but is included for historical value.
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Title: The Edwards Underground Water District and Edwards Underground Reservoir
Description:
Description of the Edwards Underground Water District and Reservoir. Note: This document is included for its historical value. Note: There is another document with the same title but different content.
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Title: The Water Level
Description:
Periodical publication of the Edwards Underground Water District for the general public. Note: Legal-size format.
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Title: The Water Level
Description:
Periodical publication of the Edwards Underground Water District for the general public
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Title: The Water Source
Description:
Features and summaries of news and scientific studies published by the Edwards Underground Water District from 1989-1996
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Title: Threatened and endangered plant and animal species of the Edwards Aquifer
Description:
Description, distribution, habitat, feeding and breeding requirements of seven species of the Edwards Aquifer listed by the United States Fish & Wildlife Service and/or Texas Parks and Wildlife Department as Threatened or Endangered as of 1995. Note: this document is included for its historical value and may have been superseded by more recent classifications and publications.
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Title: Tracer Test Work Plan, Kinney and Uvalde Counties
Description:
Plan for dye tracer studies in Kinney and Uvalde Counties
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Title: Tracing Groundwater Flowpaths in Kinney County, Texas
Description:
This report presents the findings of a groundwater flowpath investigation in Kinney County, Texas, performed by the Edwards Aquifer Authority between 2007 and 2012.
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Title: Tracing Groundwater Flowpaths in the Edwards Aquifer Recharge Zone, Panther Springs Creek Basin, Northern Bexar County, TX
Description:
Dye tracer tests in the Edwards Aquifer, Balcones Fault Zone, San Antonio Segment, Bexar County, Panther Springs Creek
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Title: Tracing Groundwater Flowpaths in the Vicinity of San Marcos Springs, Texas
Description:
Tracer studies of the San Marcos Springs springshed from 2002 -2010
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Title: Trans-Texas Water Issues Survey Report West Central Study Area
Description:
Survey Report of the West Central Texas water plan for the Trans-Texas Water Program. Note: This study is included for historical value but has been replaced by more recent plans.
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Title: Trans-Texas Water Program West Central Study Area Integrated Resource Planning Committee Final Criteria Report Public Participation / Stakeholder Involvement Process
Description:
Note: This report is included because of its possible historical value. It has been replaced by more recent plans. Input of public and stakeholders in the Trans-Texas Water Program West Central Study Area.
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Title: Trans-Texas Water Program West Central Study Area Letter of Intent Analysis
Description:
Feasibility and cost analysis for providing surface water to San Antonio from the Guadalupe River. Note: This report is included because of its historical value but has been replaced by more recent plans.
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Title: Trans-Texas Water Program West Central Study Area Phase 2 Edwards Aquifer Recharge Analyses
Description:
Part of Phase II of the West Central Study Area, Trans-Texas Water Program. Included for historical value; has been replaced by more recent plans.
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Title: Trans-Texas Water Program West Central Study Area Phase I Interim Report Volume 1
Description:
Interim Phase I West Central Texas water plan for the Trans-Texas Water Program. Volume 1 contains the Executive Summary, Introduction, and Population, Water Demand and Water Supply Projections for 1990-2050. Note: This study is included for historical value but has been replaced by more recent plans.
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Title: Trans-Texas Water Program West Central Study Area Phase I Interim Report Volume 2
Description:
Interim Phase I West Central Texas water plan for the Trans-Texas Water Program. Volume 2 contains Water Supply Alternatives and Evaluations and Appendices A-D. Note: This study is included for historical value but has been replaced by more recent plans.
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Title: Trans-Texas Water Program West Central Study Area Phase I Interim Report Volume 3
Description:
Interim Phase I West Central Texas water plan for the Trans-Texas Water Program. Volume 3 contains the continuation of Water Supply Alternatives and Evaluations and Appendices E-I. Note: This study is included for historical value but has been replaced by more recent plans.
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Title: Trans-Texas Water Program West Central Study Area Phase I Interim Report Volume 4
Description:
Interim Phase I West Central Texas water plan for the Trans-Texas Water Program. Volume 4 contains the continuation of Water Supply Alternatives and Evaluations and Appendices J and K. Note: This study is included for historical value but has been replaced by more recent plans.
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Title: Trans-Texas Water Program West Central Study Area Phase I Interim Report Volume 5 / Comments Received from the Advisory Committee for Public and Technical Input
Description:
Comments on public input for Phase I of the Trans-Texas Water Plan for West Central Texas
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Title: Trans-Texas Water Program West Central Study Area Phase II Comments
Description:
Comments from various government and business stakeholders on different sections of Phase 2 of the 1998 Trans-Texas Water Program West Central Study Area Note: This document was included for historical value but has been replaced by the Texas Water Plan.
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Title: Trans-Texas Water Program West Central Study Area Phase II Edwards Aquifer Recharge Analyses
Description:
Compilation of four studies: Report 1 Guadalupe - San Antonio River Basin Recharge Enhancement Study Feasibility Assessment Report 2 Conceptual Evaluation of Springflow Recirculation Report 3 Modification of Principal Spillways at Existing Flood Control Projects for Recharge Enhancement Report 4 Edwards Aquifer Recharge Update Note: This document was included for historical value but has been replaced by the Texas Water Plan.
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Title: Trans-Texas Water Program West Central Study Area Phase II Guadalupe-San Antonio River Basin Environmental Criteria Refinement
Description:
Modeling, summary of biological studies, and sensitivity analyses to support refinement of environmental criteria for the Trans-Texas Water Program West Central Study Area Phase II Guadalupe-San Antonio River Basin Note: This report is included for its possible historical value but has been replaced by the Texas Water Plan.
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Title: Trans-Texas Water Program West Central Study Area Phase II Guadalupe-San Antonio River Basin Model Modifications & Enhancements
Description:
Modifications and enhancements for the Guadalupe-San Antonio River Basin Model (GSA Model) for the Trans-Texas Water Program West Central Study Area Phase II Note: This report is included for its possible historical value but has been replaced by the Texas Water Plan.
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Title: Trans-Texas Water Program West Central Study Area Phase II Population, Water Demand and Water Supply Projections
Description:
Projections for population and water demand from 1990-2050 for the 1998 Trans-Texas Water Program West Central Study Area Phase II Note: This report is included for its historical value but has been replaced by more recent studies.
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Title: Trans-Texas Water Program West Central Study Area Phase II Summary Report of Water Supply Alternatives
Description:
Discussion of water supply alternatives for the 1998 Trans-Texas Water Program West Central Study Area Phase II Note: This report is included for its possible historical value but has been replaced by the Texas Water Plan.
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Title: Trans-Texas Water Program West Central Study Area Phase II Updated Evaluation of Potential Reservoirs in the Guadalupe River Basin
Description:
Phase II of the West Central Texas water plan for the Trans-Texas Water Program, containing updated evaluations of potential reservoirs in the Guadalupe River Basin. Note: This report is included for its historical value but has been replaced by more recent studies.
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Title: Trans-Texas Water Program West Central Study Area Public Participation / Stakeholder Involvement Plan
Description:
Note: This report is included because of its possible historical value. It has been replaced by more recent plans. Plan for involving the public and stakeholders in the planning process for the Trans-Texas Water Program West Central Study Area
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Title: Trans-Texas Water Program West Central Study Area Public Participation / Stakeholder Involvement Program Final Report
Description:
Summary of stakeholder involvement in the 1998 Trans-Texas Water Program West Central Study Area
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Title: Trans-Texas Water Program West Central Study Area Technical Memorandum Public Participation Stakeholder Involvement Process Issues Document
Description:
Discussion of process for public and stakeholder involvement for the 1998 Trans-Texas Water Program West Central Study Area Phase II Note: This report is included for its possible historical value but has been replaced by the Texas Water Plan.
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Title: Universal Passive Samplers and the Aliasing Problem in Groundwater Sampling
Description:
AY-68-29-418 (Rio Seco) was selected for this study because it is within the Recharge Zone of the Edwards Aquifer surrounded by urban development, and water samples contain consistent PCE concentrations. AY-68-29-418 was sampled eight times to determine the correlation between PCE concentrations from universal passive samplers and water quality grab samples. EAA field staff exchanged the universal passive samplers every 48 hours, one universal passive sampler for one-hour exposure time, and two universal passive samplers for ten days exposure time. During each retrieval of universal passive samplers, EAA field staff also obtained a grab sample.
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Title: Updates to the MODFLOW Groundwater Model of the San Antonio Segment of the Edwards Aquifer
Description:
MODFLOW groundwater model springflow in the Edwards Aquifer Balcones Fault Zone San Antonio Segment and Barton Springs segment
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Title: Upper Reaches of Leon Creek Watershed Frequency Analysis for Storm of June 30-July 2, 2002 Phase I
Description:
Analysis of runoff and peak flow from a major rainfall event June 30-July 5, 2002 in the Leon Creek Watershed, Bexar County, TX
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Title: Use of landsat thematic mapper data to identify crop types and estimate irrigated acreage, Uvalde and Medina Counties, Texas, 1991
Description:
Using the landsat thematic mapper to estimate total irrigated acreage and acre-feet of irrigation water for Uvalde and Medina Counties in 1991
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Title: Using Geophysical Logs in the Edwards Aquifer to Estimate Water Quality Along the Freshwater/Saline-Water Interface (Uvalde to San Antonio, Texas)
Description:
Note: Large-format versions of the plates for this report are available in a companion document. Analysis of geophysical logs and well data to redefine the boundary of the freshwater/saline interface in the Edwards Aquifer Balcones Fault Zone San Antonio Segment.
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Title: Using Geophysical Logs in the Edwards Aquifer to Estimate Water Quality Along the Freshwater/Saline-Water Interface (Uvalde to San Antonio, Texas) - Plates
Description:
Full-size plates from Using Geophysical Logs in the Edwards Aquifer to Estimate Water Quality Along the Freshwater/Saline-Water Interface (Uvalde to San Antonio, Texas). See companion document.
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Title: Valdina Farms Sinkhole: Hydrogeologic & Biologic Evaluation
Description:
Documentation of hydrogeology, structure and fauna in Valdina Farms Sinkhole, Medina County, in 1987
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Title: Variable Flow Study - Seven Years of Monitoring and Applied Research
Description:
Summary of the Comprehensive and Critical Period Monitoring Program to Evaluate the Effects of Variable Flow on Biological Resources in the Comal and San Marcos Springs Ecosystems Aquatic for 2000-2007
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Title: Water Quality at Selected Locations in the San Antonio Area, Texas: Progress Report, 1972
Description:
Results of water quality testing at selected sites in the Edwards Aquifer from September 1969 – August 1971
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Title: Water quality of the Edwards Aquifer and streams recharging the aquifer in the San Antonio region, Texas (Map)
Description:
Low-resolution maps and discussion of water quality in the Edwards Aquifer Balcones Fault Zone San Antonio Segment. Note: file size for full-size maps is too large.
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Title: Water Quality Trends Analysis of the San Antonio Segment, Balcones Fault Zone Edwards Aquifer, Texas
Description:
Summary of water analyses in the Edwards Aquifer Balcones Fault Zone San Antonio Segment from 1913-2006
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Title: Water Quality Trends Analysis of the San Antonio Segment, Balcones Fault Zone Edwards Aquifer, Texas
Description:
Collection and analysis of thousands of groundwater, surface water, and spring water samples to evaluate water quality in the San Antonio segment of the Balcones Fault Zone Edwards Aquifer of south central Texas.
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Title: Water Quality/Variable Flow Study Summary of Critical Period Sampling #1 Comal River, New Braunfels, Texas August 23-31, 2000
Description:
Sampling activities methodologies, sample locations, and raw data for critical period monitoring on the Comal River, New Braunfels, Texas August 23-31, 2000
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Title: Water Quality/Variable Flow Study Summary of Critical Period Sampling #2 Comal River, New Braunfels, Texas September 7-15, 2000
Description:
Sampling activities methodologies, sample locations, and raw data for critical period monitoring on the Comal River, New Braunfels, Texas September 7-15, 2000
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Title: Water Quality/Variable Flow Study Summary of Fall Quarterly Sampling Comal River, New Braunfels, Texas November 9-17, 2000
Description:
Sampling activities methodologies, sample locations, and raw data for critical period monitoring on the Comal River, New Braunfels, Texas September 7-15, 2000
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Title: Water Quality/Variable Flow Study Summary of Fall Quarterly Sampling San Marcos River, San Marcos, Texas October 24-November 2, 2000
Description:
Sampling activities methodologies, sample locations, and raw data for critical period monitoring in the San Marcos River October 24-November 2, 2000
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Title: Water resources of the Edwards Aquifer Region [Infographic]
Description:
Infographic and map showing structure, discharge and recharge of the Edwards Aquifer. Scale ca. 1:500,000. Note: contains both letter-size and large-format versions.
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Title: Water-Budget Analysis of Medina and Diversion Lakes and the Medina/Diversion Lake System, with Estimated Recharge to Edwards Aquifer, San Antonio, Texas
Description:
Water-budget analysis for Medina and related lakes including recharge in the Edwards Aquifer from 1995-2002
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Title: Well Sampling for Aquifer Biota
Description:
Sampling plan for studying subterranean species of the Edwards Aquifer Balcones Fault Zone San Antonio Segment
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