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dc.contributor.advisorBrusseau, Mark L.en
dc.contributor.authorRohrer, Jonathan William
dc.creatorRohrer, Jonathan Williamen
dc.date.accessioned2018-02-26T16:10:38Z
dc.date.available2018-02-26T16:10:38Z
dc.date.issued1996
dc.identifier.urihttp://hdl.handle.net/10150/626789
dc.description.abstractTwo dual-well, forced gradient, tracer experiments have been conducted at a Superfund site as part of an effort to better define the efficiency of ongoing "pump and treat" remediation. An injection/extraction well couplet, 24.5 ft. in length, was used to generate steady flow through a 20 ft. thick semi-confined aquifer unit beginning at 140 ft. BGS. The unit grades downward from a fine-medium sand to a clayey gravel with cobbles up to 4 inches in nominal diameter. Bromide breakthrough was monitored at the extraction well and at four vertically discrete zones in a centerline monitor well located 13.8 feet from the injection well using an innovative multilevel sampler. Calculated hydraulic conductivities based on the tracer data range from 1 to 43 ft./day, and compare well to an aquifer pump-test value of 30.1 ft./day. One-dimensional transport modeling was used to estimate values of dispersivity ranging from 1 to 2 ft. for the medium sand.
dc.language.isoen_USen
dc.publisherThe University of Arizona.en
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
dc.titleA Field Study of Non-Reactive Transport Behavior in a Heterogeneous Aquifer Uniten_US
dc.typetexten
dc.typeThesis-Reproduction (electronic)en
thesis.degree.grantorUniversity of Arizonaen
thesis.degree.levelmastersen
dc.contributor.committeememberBrusseau, Mark L.en
thesis.degree.disciplineGraduate Collegeen
thesis.degree.disciplineHydrology and Water Resourcesen
thesis.degree.nameM.S.en
dc.description.noteDigitized from paper copies provided by the Department of Hydrology & Atmospheric Sciences.en
refterms.dateFOA2018-07-06T05:02:16Z
html.description.abstractTwo dual-well, forced gradient, tracer experiments have been conducted at a Superfund site as part of an effort to better define the efficiency of ongoing "pump and treat" remediation. An injection/extraction well couplet, 24.5 ft. in length, was used to generate steady flow through a 20 ft. thick semi-confined aquifer unit beginning at 140 ft. BGS. The unit grades downward from a fine-medium sand to a clayey gravel with cobbles up to 4 inches in nominal diameter. Bromide breakthrough was monitored at the extraction well and at four vertically discrete zones in a centerline monitor well located 13.8 feet from the injection well using an innovative multilevel sampler. Calculated hydraulic conductivities based on the tracer data range from 1 to 43 ft./day, and compare well to an aquifer pump-test value of 30.1 ft./day. One-dimensional transport modeling was used to estimate values of dispersivity ranging from 1 to 2 ft. for the medium sand.


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