Displaying Hydrology and Hydrogeology Related Reports

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: 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: 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 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: Edwards Aquifer Authority Synoptic Water Level Program 1999-2004 Report
Description:
1999-2004 synoptic water level study
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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: 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: 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: 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: 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: Edwards Aquifer Authority Synoptic Water Level Program 2005-2009 Water Level Data
Description:
2005-2009 synoptic water level study
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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: 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: 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: 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 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 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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 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 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: Medina Lake Hydrology Study
Description:
Hydrologic and hydraulic analyses for the Medina Lake and Medina Diversion Lake reservoir system
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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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: Groundwater Level Monitoring Plan
Description:
Guidance for collecting groundwater data by the Edwards Aquifer Authority
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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: 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: Edwards Aquifer Authority Hydrologic Data Summary for 2007
Description:
2007 hydrologic data summary
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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: 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: 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: 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: 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: 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: 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 - 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: 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: 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 - 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 - 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: 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: 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: Government Canyon Geologic and Hydrologic Assessment
Description:
Government Canyon geologic and hydrologic assessment
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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: 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: 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: 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: 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: 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: 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: 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: 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: 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-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-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: 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-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 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 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: 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: Aquifer Science Research Program Plan: 2006-2011
Description:
Edwards Aquifer Authority Aquifer Science Research Program Plan for 2006-2011
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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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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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