Carbonate geology and hydrology of the Edwards Aquifer in the San Antonio area, Texas

Maclay, R.W.; Small, T.A.

doi:10.3133/ofr83537

Cited by 95 publications

(258 citation statements)

References 16 publications

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“…56). The Edwards aquifer, a karst aquifer in central Texas, has transmissivity values in the same range as the Upper Floridan, with some estimates as high as 20,000,000 ft 2 /day (Maclay and Small, 1986;Hovorka and others, 1995). Transmissivity in karst generally occurs in small intervals of the total thickness.…”

Section: Hydraulic Conductivitymentioning

confidence: 99%

Documentation of spreadsheets for the analysis of aquifer-test and slug-test data

Halford¹,

Kuniansky²

2002

Open-File Report

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PrefaceThis report documents several spreadsheets that have been developed for the analysis of aquifer-test and slug-test data. Each spreadsheet incorporates analytical solution(s) of the partial differential equation for ground-water flow to a well for a specific type of condition or aquifer. The spreadsheets were written in Microsoft Excel version 9.0. Use of trade names does not constitute endorsement by the U.S. Geological Survey (USGS). The spreadsheets have been tested for accuracy using datasets from different aquifer tests or generated from the analytical solution. If users find or suspect errors with these spreadsheets, please contact the USGS.Every effort has been made by the USGS or the United States Government to ensure the spreadsheets are error free. Despite our best efforts, the possibility exists that there are errors in the spreadsheets. The distribution of the spreadsheets does not constitute any warranty by the USGS, and no responsibility is assumed by the USGS in connection therewith.

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Section: Hydraulic Conductivitymentioning

confidence: 99%

Documentation of spreadsheets for the analysis of aquifer-test and slug-test data

Halford¹,

Kuniansky²

2002

Open-File Report

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“…Glen Rose Limestone Modified from Maclay (1995) Descriptors "very small, small, moderate, and large" refer to relative permeability of stratigraphic units Maclay, 1995, fig. 11).…”

Section: Glen Rose Limestonementioning

confidence: 99%

New insights into the Edwards Aquifer—Brackish-water simulation, drought, and the role of uncertainty analysis

Foster¹,

White²

2016

Fact Sheet

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• Uncertainty analysis provided insights as to the reliability of the model inputs and model results.• Brackish water is not expected to move appreciably toward production wells near the transition zone interface if a repeat of drought-of-record conditions occurs.• The model is reliable for predicting brackish-water movement near production wells.• The model is not reliable for predicting Bexar County index well J-17 water levels or for predicting flows at Comal and San Marcos Springs.• Many hydraulic properties of the Edwards aquifer, as well as recharge to the aquifer, remain highly uncertain, even after the model has been calibrated.

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“…Between Cowgill Road (on the northwest) and Wilderness Road (on the southeast), erosional remnants of the Kainer Formation cap some of the higher hills underlain by Glen Rose Limestone. Forgotson (1956), Rose (1972), Ashworth (1983); hydrogeologic subdivisions (aquifers, zones) from Maclay (1995), Barker and Ardis (1996); lithologic terminology modified from Dunham (1962); and porosity type modified from Choquette and Pray (1970). AQ, aquifer; CU, confining unit; * not exposed in the study area] 1 Referred to as "hydrostratigraphic zones" by Maclay (1995).…”

Section: Geologic Framework Generalmentioning

confidence: 99%

“…Forgotson (1956), Rose (1972), Ashworth (1983); hydrogeologic subdivisions (aquifers, zones) from Maclay (1995), Barker and Ardis (1996); lithologic terminology modified from Dunham (1962); and porosity type modified from Choquette and Pray (1970). AQ, aquifer; CU, confining unit; * not exposed in the study area] 1 Referred to as "hydrostratigraphic zones" by Maclay (1995). The faults in northern Bexar County are part of the Balcones fault zone ( fig.…”

Section: Geologic Framework Generalmentioning

confidence: 99%

Geologic framework and hydrogeologic features of the Glen Rose Limestone, Camp Bullis Training Site, Bexar County, Texas

Clark¹

2003

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Carbonate geology and hydrology of the Edwards Aquifer in the San Antonio area, Texas

Cited by 95 publications

References 16 publications

Documentation of spreadsheets for the analysis of aquifer-test and slug-test data

Documentation of spreadsheets for the analysis of aquifer-test and slug-test data

New insights into the Edwards Aquifer—Brackish-water simulation, drought, and the role of uncertainty analysis

Geologic framework and hydrogeologic features of the Glen Rose Limestone, Camp Bullis Training Site, Bexar County, Texas

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