Persistent Link:
http://hdl.handle.net/10150/191580
Title:
Determination of hydraulic parameters in a fractured rock aquifer
Author:
Campana, Michael Emerson,1948-
Issue Date:
1973
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 following equation is derived to determine the vertical hydraulic conductivity Kz of an artesian fractured rock aquifer: Kₒ[(Kz/Kr) ½ πr/b] = 2B csc(πd/b) where Kₒ, Kr, b, d, and B are respectively the zero-order modified Bessel function of the second kind, the radial hydraulic conductivity, the aquifer thickness, the depth of penetration of the pumped well, and a function of Kr, h, d, discharge Q, drawdown s, and the well function W(u). An estimate of Kr is obtained using the Theis equation or the double slope method. A drawdown prediction equation is also formulated: S = (Q/4πKrb)/{W(u)+(2b/πd) Kₒ[(Kz/Kr) ½πr/b]sin(πd/b). Data from two aquifer tests in a fractured volcanic tuff aquifer were analyzed using these equations to determine Kz. In test 1 it was not possible to obtain realistic values for Kz. In test 2, a value for Kz obtained that was both realistic and consistent with a value obtained by another method. The Theis equation is easier to use than the double slope method. However, both techniques neglect Kz when they are used to estimate Kr. Neglect of observation well partial penetration may have introduced some error. Methods presented in this study are also applicable to artesian nonfractured rock aquifers.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Aquifers -- Mathematical models.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Harshbarger, John W.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleDetermination of hydraulic parameters in a fractured rock aquiferen_US
dc.creatorCampana, Michael Emerson,1948-en_US
dc.contributor.authorCampana, Michael Emerson,1948-en_US
dc.date.issued1973en_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 following equation is derived to determine the vertical hydraulic conductivity Kz of an artesian fractured rock aquifer: Kₒ[(Kz/Kr) ½ πr/b] = 2B csc(πd/b) where Kₒ, Kr, b, d, and B are respectively the zero-order modified Bessel function of the second kind, the radial hydraulic conductivity, the aquifer thickness, the depth of penetration of the pumped well, and a function of Kr, h, d, discharge Q, drawdown s, and the well function W(u). An estimate of Kr is obtained using the Theis equation or the double slope method. A drawdown prediction equation is also formulated: S = (Q/4πKrb)/{W(u)+(2b/πd) Kₒ[(Kz/Kr) ½πr/b]sin(πd/b). Data from two aquifer tests in a fractured volcanic tuff aquifer were analyzed using these equations to determine Kz. In test 1 it was not possible to obtain realistic values for Kz. In test 2, a value for Kz obtained that was both realistic and consistent with a value obtained by another method. The Theis equation is easier to use than the double slope method. However, both techniques neglect Kz when they are used to estimate Kr. Neglect of observation well partial penetration may have introduced some error. Methods presented in this study are also applicable to artesian nonfractured rock aquifers.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshAquifers -- 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.chairHarshbarger, John W.en_US
dc.contributor.committeememberSimpson, Eugene S.en_US
dc.contributor.committeememberInce, Simonen_US
dc.identifier.oclc213096657en_US
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