Use of chloride and chlorine isotopes in the unsaturated zone to characterize recharge at the Nevada Test Site

Persistent Link:
http://hdl.handle.net/10150/191924
Title:
Use of chloride and chlorine isotopes in the unsaturated zone to characterize recharge at the Nevada Test Site
Author:
Gifford, Seth Kelley,1952-
Issue Date:
1987
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:
Chloride and ³⁶C1 from 1950's weapons testing are good tracers of recent precipitation recharge in arid environments like the Nevada Test Site. Examining the distribution of chloride in soil, rock fractures and rock matrices is a simple method to clarify the dynamics of long time averaged hydrologic processes, such as occur in unsaturated zones. In general, where infiltration is rapid, chloride gets flushed into the soil or deeper into fractures. An estimate for infiltration rates can then be obtained by finding the peak of the ³⁶C1 bomb pulse in the soil chloride. Some care should be exercised while using chlorides as tracers in layered or calcified soils. Results from a numerical model that is calibrated with soil ³⁶C1 soil data also indicate that soil moisture and chloride do not necessarily follow the same path at large soil suctions. Nonetheless, the distribution of chlorine and its isotopes in unsaturated rock appears to be a useful tool to tracing historic water movement in a fracture system and perhaps qualitatively defining the matrix diffusion potential of the rock.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Groundwater tracers -- Nevada.; Chlorides.; Chlorine -- Isotopes.; Groundwater -- Nevada.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Davis, S. N.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleUse of chloride and chlorine isotopes in the unsaturated zone to characterize recharge at the Nevada Test Siteen_US
dc.creatorGifford, Seth Kelley,1952-en_US
dc.contributor.authorGifford, Seth Kelley,1952-en_US
dc.date.issued1987en_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.abstractChloride and ³⁶C1 from 1950's weapons testing are good tracers of recent precipitation recharge in arid environments like the Nevada Test Site. Examining the distribution of chloride in soil, rock fractures and rock matrices is a simple method to clarify the dynamics of long time averaged hydrologic processes, such as occur in unsaturated zones. In general, where infiltration is rapid, chloride gets flushed into the soil or deeper into fractures. An estimate for infiltration rates can then be obtained by finding the peak of the ³⁶C1 bomb pulse in the soil chloride. Some care should be exercised while using chlorides as tracers in layered or calcified soils. Results from a numerical model that is calibrated with soil ³⁶C1 soil data also indicate that soil moisture and chloride do not necessarily follow the same path at large soil suctions. Nonetheless, the distribution of chlorine and its isotopes in unsaturated rock appears to be a useful tool to tracing historic water movement in a fracture system and perhaps qualitatively defining the matrix diffusion potential of the rock.en_US
dc.description.notehydrology collectionen_US
dc.description.notep. 84 missing from paper original and microfilm version.-
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshGroundwater tracers -- Nevada.en_US
dc.subject.lcshChlorides.en_US
dc.subject.lcshChlorine -- Isotopes.en_US
dc.subject.lcshGroundwater -- Nevada.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.chairDavis, S. N.en_US
dc.identifier.oclc213416890en_US
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