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dc.contributor.authorRoberts, Mary Elizabeth, 1959-
dc.creatorRoberts, Mary Elizabeth, 1959-en_US
dc.date.accessioned2011-11-28T14:10:10Z
dc.date.available2011-11-28T14:10:10Z
dc.date.issued1986en_US
dc.identifier.urihttp://hdl.handle.net/10150/191902
dc.description.abstractA major problem associated with monitoring the velocity of water in unsaturated porous media is the difficulty of removing samples of the pore water at different times for analysis. A possible solution to this problem is to use volatile fluorocarbon tracers which are transported in a soluble form, yet can be measured in a gaseous state, thus eliminating the difficult process of extracting liquid samples from soils with high matric suction. The three fluorocarbon tracers used to investigate the suitability of a volatile tracer method were bromochlorodifluoromethane, chlorodifluoroethane and sulfur hexafluoride. Five laboratory column experiments were conducted to determine under what conditions volatile tracers would give reliable estimates of water flow rates. The Discrete State Compartment computer model was used to interpret the laboratory data, thereby allowing a more accurate estimate of water travel times in unsaturated media.
dc.language.isoenen_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.subjectHydrology.
dc.subjectGroundwater flow.
dc.subjectGroundwater tracers.
dc.titleThe use of fluorocarbon tracers to monitor the movement of water in unsaturated porous media : column study and computer modelen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.contributor.chairEvans, Daniel D.en_US
dc.identifier.oclc213360383en_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineHydrology and Water Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.nameM.S.en_US
dc.description.notehydrology collectionen_US
refterms.dateFOA2018-08-24T13:45:51Z
html.description.abstractA major problem associated with monitoring the velocity of water in unsaturated porous media is the difficulty of removing samples of the pore water at different times for analysis. A possible solution to this problem is to use volatile fluorocarbon tracers which are transported in a soluble form, yet can be measured in a gaseous state, thus eliminating the difficult process of extracting liquid samples from soils with high matric suction. The three fluorocarbon tracers used to investigate the suitability of a volatile tracer method were bromochlorodifluoromethane, chlorodifluoroethane and sulfur hexafluoride. Five laboratory column experiments were conducted to determine under what conditions volatile tracers would give reliable estimates of water flow rates. The Discrete State Compartment computer model was used to interpret the laboratory data, thereby allowing a more accurate estimate of water travel times in unsaturated media.


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