Displaying Geology Related Reports

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: 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 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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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