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Effects of soil saturation and pore fluid salinity on complex conductivity
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Grunat, David A. Effects of soil saturation and pore fluid salinity on complex conductivity. Retrieved from https://doi.org/doi:10.7282/T3H130QN

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TitleEffects of soil saturation and pore fluid salinity on complex conductivity
NameGrunat, David A (author); Slater, Lee D (chair); Wehrer, Markus (internal member); Gimenez, Daniel (outside member); Rutgers University; Graduate School - Newark
Date Created2013
Other Date2013-01 (degree)
SubjectEnvironmental Geology, Soil science, Induced polarization, Geophysics
Extentvii, 38 p. : ill.
DescriptionRecent studies have shown that induced polarization (IP) coupled with electrical resistivity surveys can be used for in-situ lithological and hydrologic discrimination of the subsurface; yet the driving factors behind the effects of water content dynamics on IP are relatively understudied. We sought to improve understanding of the relationship of IP on variations in saturation state for an undisturbed agricultural soil. Our experiment consisted of collecting IP measurements concurrently with hydraulic data during multistep outflow experiments. We determined the hydraulic properties of the undisturbed soil samples and correlated them with IP data, primarily changes in saturation. Due to an increase in salinity with decreasing saturation, we found that imaginary conductivity (σ”) may offer distinct advantages for determining moisture content over real conductivity (σ’) measurements. Although σ” exhibits a weaker dependence on saturation compared to σ’, the relative insensitivity of σ” to salinity creates a more robust measure of moisture content in the presence of changing salinities. As changes in pore fluid conductivity are likely to occur in the field simultaneously with water content changes, we argue that, although IP has traditionally been used to discriminate lithology, temporal IP measurements may additionally provide a robust indicator of changes in saturation state.
NoteM.S.
NoteIncludes bibliographical references
NoteIncludes vita
Noteby David A Grunat
Genretheses, ETD graduate
Persistent URLhttps://doi.org/doi:10.7282/T3H130QN
Languageeng
CollectionGraduate School - Newark Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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