Persistent Link:
http://hdl.handle.net/10150/300511
Title:
The Application of Step-Drawdown Pumping Tests for Determining Well Losses in Consolidated Rock Aquifers
Author:
Uhl, V. W., Jr.; Joshi, V. G.; Alpheus, A.; Sharma, G.
Affiliation:
Hydrology and Water Resources, University of Arizona, Tucson, Arizona; Evangelical Lutheran Church Water Development Project, Getul, M.P., India
Issue Date:
12-Apr-1975
Rights:
Copyright ©, where appropriate, is held by the author.
Collection Information:
This article is part of the Hydrology and Water Resources in Arizona and the Southwest collections. Digital access to this material is made possible by the Arizona-Nevada Academy of Science and the University of Arizona Libraries. For more information about items in this collection, contact anashydrology@gmail.com.
Publisher:
Arizona-Nevada Academy of Science
Journal:
Hydrology and Water Resources in Arizona and the Southwest
Abstract:
The concept of a step -drawdown test was first introduced by Jacob, and further modifications in the technique were made by Rorabaugh. Analysis of step -drawdown test data enables the quantification of the components of drawdown due to formation or aquifer loss, and due to well losses in a pumped well. This technique has been used to test approximately 100 wells that were drilled in crystalline and basalt formations in central India. Test data have been analyzed by Rorabaugh's method and by a graphical method, and the results of a number of tests are presented and discussed. Anomalies in the test analysis often proved helpful for interpreting aquifer irregularities. In general, the well loss constant decreases with an increase in specific capacity and the aquifer loss constant decreases with increasing transmissivity. Significant reductions in specific capacity during a step test occur in wells with high well losses. An attempt is made to quantify the well losses in a consolidated rock well, and a number of practical applications of step -drawdown tests are discussed.
Keywords:
Hydrology -- Arizona.; Water resources development -- Arizona.; Hydrology -- Southwestern states.; Water resources development -- Southwestern states.; Aquifers; Step-downs; Drawdown; Water level fluctuations; Pumping; Wells; Water levels; Transmissivity; Rock properties; India
ISSN:
0272-6106

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleThe Application of Step-Drawdown Pumping Tests for Determining Well Losses in Consolidated Rock Aquifersen_US
dc.contributor.authorUhl, V. W., Jr.en_US
dc.contributor.authorJoshi, V. G.en_US
dc.contributor.authorAlpheus, A.en_US
dc.contributor.authorSharma, G.en_US
dc.contributor.departmentHydrology and Water Resources, University of Arizona, Tucson, Arizonaen_US
dc.contributor.departmentEvangelical Lutheran Church Water Development Project, Getul, M.P., Indiaen_US
dc.date.issued1975-04-12-
dc.rightsCopyright ©, where appropriate, is held by the author.en_US
dc.description.collectioninformationThis article is part of the Hydrology and Water Resources in Arizona and the Southwest collections. Digital access to this material is made possible by the Arizona-Nevada Academy of Science and the University of Arizona Libraries. For more information about items in this collection, contact anashydrology@gmail.com.en_US
dc.publisherArizona-Nevada Academy of Scienceen_US
dc.identifier.journalHydrology and Water Resources in Arizona and the Southwesten_US
dc.description.abstractThe concept of a step -drawdown test was first introduced by Jacob, and further modifications in the technique were made by Rorabaugh. Analysis of step -drawdown test data enables the quantification of the components of drawdown due to formation or aquifer loss, and due to well losses in a pumped well. This technique has been used to test approximately 100 wells that were drilled in crystalline and basalt formations in central India. Test data have been analyzed by Rorabaugh's method and by a graphical method, and the results of a number of tests are presented and discussed. Anomalies in the test analysis often proved helpful for interpreting aquifer irregularities. In general, the well loss constant decreases with an increase in specific capacity and the aquifer loss constant decreases with increasing transmissivity. Significant reductions in specific capacity during a step test occur in wells with high well losses. An attempt is made to quantify the well losses in a consolidated rock well, and a number of practical applications of step -drawdown tests are discussed.en_US
dc.subjectHydrology -- Arizona.en_US
dc.subjectWater resources development -- Arizona.en_US
dc.subjectHydrology -- Southwestern states.en_US
dc.subjectWater resources development -- Southwestern states.en_US
dc.subjectAquifersen_US
dc.subjectStep-downsen_US
dc.subjectDrawdownen_US
dc.subjectWater level fluctuationsen_US
dc.subjectPumpingen_US
dc.subjectWellsen_US
dc.subjectWater levelsen_US
dc.subjectTransmissivityen_US
dc.subjectRock propertiesen_US
dc.subjectIndiaen_US
dc.identifier.issn0272-6106-
dc.identifier.urihttp://hdl.handle.net/10150/300511-
dc.identifier.journalHydrology and Water Resources in Arizona and the Southwesten_US
dc.typetexten_US
dc.typeProceedingsen_US
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