Aquifer characteristics from well-field production records-- Edwards Limestone, San Antonio area, Texas.

Persistent Link:
http://hdl.handle.net/10150/191500
Title:
Aquifer characteristics from well-field production records-- Edwards Limestone, San Antonio area, Texas.
Author:
Garza, Sergio,1929-
Issue Date:
1968
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The Edwards limestone aquifer, the main source of water to the San Antonio area of south central Texas, has been the subject of numerous hydrologic investigations. The most comprehensive studies have related changes in aquifer head and storage to the differences between recharge and discharge. Projections of future demands from the aquifer are used to predict future aquifer heads, but these are limited to yearend estimates and do not include maximum summertime drawdowns. The Theis nonequilibrium formula, with a modification introduced by Stallman for continuously varying discharge, was used with well-field production records to determine apparent values of aquifer characteristics. Although the aquifer model does not strictly apply to the mathematical model imposed by the formula, useful approximations of the coefficients of transmissivity (12 million gallons per day per foot) and storage (0. 6 x l0) were derived. Testing the coefficients with independent historical data gave some credence to the magnitude of the above results. These apparent coefficients were used with projected aquifer demands and year-end aquifer heads to predict maximum possible summertime drawdowns in a key well for 1970-2000. The 2000 summertime head was projected to be 100 feet lower than the record summertime low of 1956.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Groundwater -- Texas.; Hydrology -- Mathematical models.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Simpson, E. S.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleAquifer characteristics from well-field production records-- Edwards Limestone, San Antonio area, Texas.en_US
dc.creatorGarza, Sergio,1929-en_US
dc.contributor.authorGarza, Sergio,1929-en_US
dc.date.issued1968en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe Edwards limestone aquifer, the main source of water to the San Antonio area of south central Texas, has been the subject of numerous hydrologic investigations. The most comprehensive studies have related changes in aquifer head and storage to the differences between recharge and discharge. Projections of future demands from the aquifer are used to predict future aquifer heads, but these are limited to yearend estimates and do not include maximum summertime drawdowns. The Theis nonequilibrium formula, with a modification introduced by Stallman for continuously varying discharge, was used with well-field production records to determine apparent values of aquifer characteristics. Although the aquifer model does not strictly apply to the mathematical model imposed by the formula, useful approximations of the coefficients of transmissivity (12 million gallons per day per foot) and storage (0. 6 x l0) were derived. Testing the coefficients with independent historical data gave some credence to the magnitude of the above results. These apparent coefficients were used with projected aquifer demands and year-end aquifer heads to predict maximum possible summertime drawdowns in a key well for 1970-2000. The 2000 summertime head was projected to be 100 feet lower than the record summertime low of 1956.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshGroundwater -- Texas.en_US
dc.subject.lcshHydrology -- Mathematical models.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineHydrology and Water Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairSimpson, E. S.en_US
dc.contributor.committeememberQashu, H. K.en_US
dc.contributor.committeememberLewis, D. D.en_US
dc.identifier.oclc225154232en_US
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