A geohydrologic study of the regional ground-water system in Avra Valley, Pima and Pinal counties, Arizona

Persistent Link:
http://hdl.handle.net/10150/191788
Title:
A geohydrologic study of the regional ground-water system in Avra Valley, Pima and Pinal counties, Arizona
Author:
Whallon, Arthur John.
Issue Date:
1983
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:
Ground water in Avra Valley, southeastern Arizona, is used for irrigation and as part of the City of Tucson municipal supply. The unconfined regional aquifer consists of about 1,300 feet of basin-fill sediments that can be subdivided into two lithostratigraphic units. The upper 300-400 feet of sediments contain permeable sands interbedded with gravel, silt, and clay. The lower 900-1,000 feet are composed of silty clay in the northern part of the valley and poorly to highly consolidated sands and gravels in the central and southern parts. Ground water enters Avra Valley as underflow from the south, flows northerly through the valley, and discharges as underflow at the northwest end of the valley. Most wells yield water at rates of 500 gpm or more. Approximately 3.6 million acre-feet of ground water were withdrawn from the aquifer during 1940-1978, resulting in water-level declines of more than 140 feet in the central part of the valley.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Groundwater -- Arizona -- Pinal County.; Groundwater -- Arizona -- Pima County.; Water-supply -- Arizona -- Tucson.; Groundwater -- Arizona -- Avra Valley.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Simpson, Eugene S.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleA geohydrologic study of the regional ground-water system in Avra Valley, Pima and Pinal counties, Arizonaen_US
dc.creatorWhallon, Arthur John.en_US
dc.contributor.authorWhallon, Arthur John.en_US
dc.date.issued1983en_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.abstractGround water in Avra Valley, southeastern Arizona, is used for irrigation and as part of the City of Tucson municipal supply. The unconfined regional aquifer consists of about 1,300 feet of basin-fill sediments that can be subdivided into two lithostratigraphic units. The upper 300-400 feet of sediments contain permeable sands interbedded with gravel, silt, and clay. The lower 900-1,000 feet are composed of silty clay in the northern part of the valley and poorly to highly consolidated sands and gravels in the central and southern parts. Ground water enters Avra Valley as underflow from the south, flows northerly through the valley, and discharges as underflow at the northwest end of the valley. Most wells yield water at rates of 500 gpm or more. Approximately 3.6 million acre-feet of ground water were withdrawn from the aquifer during 1940-1978, resulting in water-level declines of more than 140 feet in the central part of the valley.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshGroundwater -- Arizona -- Pinal County.en_US
dc.subject.lcshGroundwater -- Arizona -- Pima County.en_US
dc.subject.lcshWater-supply -- Arizona -- Tucson.en_US
dc.subject.lcshGroundwater -- Arizona -- Avra Valley.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, Eugene S.en_US
dc.contributor.committeememberHarshbarger, John W.en_US
dc.identifier.oclc213091452en_US
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