Dissertation/Thesis Abstract

Groundwater-Surface Water Interaction in the Kern River: Estimates of Baseflow from Dissolved Radon Analysis and Hydrograph Separation Techniques
by Donelan, Jack E., M.S., California State University, Long Beach, 2018, 81; 10841176
Abstract (Summary)

Geochemical mixing methods utilizing 222Rn and chloride and statistical hydrograph separation techniques were carried out in an attempt to understand baseflow dynamics in a section of the Kern River in the Sierra Nevada of Southern California. 222Rn has become a valuable tool for evaluating groundwater inflow to a river, particularly when groundwater and surface water have similar major ion geochemistry. When using geochemical methods it is important to minimize uncertainty through comparison with separate tracers and techniques, though this is complicated in this setting. Snow melt discharge and regulation of natural river flow cause hydrograph-based techniques to suffer from inaccuracies. Geochemical mixing using major ions and stable isotopes are complicated by the chemical similarity between surface water and groundwater. 222Rn is a powerful tool to elucidate this relationship in this setting if major uncertainties, like rate of radon degassing and parafluvial and hyporheic radon production can be constrained.

Indexing (document details)
Advisor: Hagedorn, Benjamin
Commitee: Becker, Matthew, Holk, Gregory
School: California State University, Long Beach
Department: Geological Sciences
School Location: United States -- California
Source: MAI 58/02M(E), Masters Abstracts International
Subjects: Hydrologic sciences, Environmental Geology, Geochemistry
Keywords: Baseflow, Geochemical, Radon, Tracer
Publication Number: 10841176
ISBN: 978-0-438-53885-6
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