Moisture characteristic curves for Apache Leap Tuff: Temperature effects and hysteresis, Superior, Arizona

Persistent Link:
http://hdl.handle.net/10150/291555
Title:
Moisture characteristic curves for Apache Leap Tuff: Temperature effects and hysteresis, Superior, Arizona
Author:
Rhodes, Shirlee Colleen, 1951-
Issue Date:
1993
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:
Laboratory methods were used to define matrix hydraulic properties for low-permeability Apache Leap Tuff core segments. Moisture content/matric potential relationships, including hysteresis, and measured hydraulic conductivity data were determined at a constant laboratory temperature of 20°C. To investigate the effects of temperature on those relationships, additional retention data were obtained at 5°C and 45°C. Measured retention data at all temperatures were applied to the van Genuchten model RETC, which performs curve-fitting and calculation of the flow parameter hydraulic conductivity. Although data at 5°C proved to be inconclusive, increasing the temperature from 20 to 45°C produced a shift of the moisture characteristic curve toward a higher potential for a given water saturation. Model-calculated hydraulic conductivity also increased as temperature increased, with respect to water saturation. The temperature-dependent change in the viscosity of water proved inadequate to explain the increases of hydraulic conductivity with temperature.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Hydrology.; Geotechnology.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Hydrology and Water Resources
Degree Grantor:
University of Arizona
Advisor:
Wilson, L. Graham

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleMoisture characteristic curves for Apache Leap Tuff: Temperature effects and hysteresis, Superior, Arizonaen_US
dc.creatorRhodes, Shirlee Colleen, 1951-en_US
dc.contributor.authorRhodes, Shirlee Colleen, 1951-en_US
dc.date.issued1993en_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.abstractLaboratory methods were used to define matrix hydraulic properties for low-permeability Apache Leap Tuff core segments. Moisture content/matric potential relationships, including hysteresis, and measured hydraulic conductivity data were determined at a constant laboratory temperature of 20°C. To investigate the effects of temperature on those relationships, additional retention data were obtained at 5°C and 45°C. Measured retention data at all temperatures were applied to the van Genuchten model RETC, which performs curve-fitting and calculation of the flow parameter hydraulic conductivity. Although data at 5°C proved to be inconclusive, increasing the temperature from 20 to 45°C produced a shift of the moisture characteristic curve toward a higher potential for a given water saturation. Model-calculated hydraulic conductivity also increased as temperature increased, with respect to water saturation. The temperature-dependent change in the viscosity of water proved inadequate to explain the increases of hydraulic conductivity with temperature.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectHydrology.en_US
dc.subjectGeotechnology.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineHydrology and Water Resourcesen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorWilson, L. Grahamen_US
dc.identifier.proquest1352373en_US
dc.identifier.bibrecord.b27054858en_US
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