In situ apparent thermal conductivity measurement at depth in the unsaturated zone.

Persistent Link:
http://hdl.handle.net/10150/191591
Title:
In situ apparent thermal conductivity measurement at depth in the unsaturated zone.
Author:
Aberra, Gebre Brhan,1944-
Issue Date:
1974
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:
Apparent thermal conductivity and diffusivity in the unsaturated zone were measured in situ using a heated resistance wire in backfilled, vertical holes and observation wells. Values of apparent thermal conductivity ranged from 0.00171 to 0.0061 cal/cm/sec/°C. The variation observed was due primarily to spatial moisture content differences in the medium. Overall, these values were consistent with results obtained by other researchers. Measurements were made where resistance wire and temperature sensor were I) in the same tube within one bore hole, II) in different tubes within one bore hole, and III) in different tubes within separate bore holes. Method III provided data with the least noise. Apparent thermal diffusivity values ranged from 0.00183 to 0.106 cm ²/sec. The higher values were obtained using methods I and II. The values obtained by method III agreed with results obtained by other researchers. However, the extra effort required for method III decreases its usefulness as a field method because thermal diffusivities can be measured easily and more accurately using other methods.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Heat -- Conduction.; Thermal diffusivity.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Supkow, Donald J.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleIn situ apparent thermal conductivity measurement at depth in the unsaturated zone.en_US
dc.creatorAberra, Gebre Brhan,1944-en_US
dc.contributor.authorAberra, Gebre Brhan,1944-en_US
dc.date.issued1974en_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.abstractApparent thermal conductivity and diffusivity in the unsaturated zone were measured in situ using a heated resistance wire in backfilled, vertical holes and observation wells. Values of apparent thermal conductivity ranged from 0.00171 to 0.0061 cal/cm/sec/°C. The variation observed was due primarily to spatial moisture content differences in the medium. Overall, these values were consistent with results obtained by other researchers. Measurements were made where resistance wire and temperature sensor were I) in the same tube within one bore hole, II) in different tubes within one bore hole, and III) in different tubes within separate bore holes. Method III provided data with the least noise. Apparent thermal diffusivity values ranged from 0.00183 to 0.106 cm ²/sec. The higher values were obtained using methods I and II. The values obtained by method III agreed with results obtained by other researchers. However, the extra effort required for method III decreases its usefulness as a field method because thermal diffusivities can be measured easily and more accurately using other methods.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshHeat -- Conduction.en_US
dc.subject.lcshThermal diffusivity.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.chairSupkow, Donald J.en_US
dc.identifier.oclc213387155en_US
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