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dc.contributor.advisorSingha, Kamini
dc.contributor.authorFeist, Rachel A.
dc.contributor.committeememberBarnard, Holly
dc.contributor.committeememberRevil, André, 1970-
dc.date.accessioned2015-08-27T03:55:23Z
dc.date.available2015-08-27T03:55:23Z
dc.date.issued2015
dc.description2015 Fall.
dc.descriptionIncludes illustrations (some color), map.
dc.descriptionIncludes bibliographical references.
dc.description.abstractMany hydrologic models assume the vegetation and streamflow are fed by the same source of water, but isotopic studies have shown this is not always the case, especially in semi-arid climates. We investigate how soil moisture pathways are affected by daily transpiration using time-lapse electrical resistivity imaging (ERI) on a ponderosa pine and the surrounding soil during the growing season. By comparing sapflow measurements to the ERI data, we find that high periods of sapflow within the diel cycle are aligned with decreases in ground conductivity and soil moisture due to drying out of the soil during uptake. As the sapflow slows during the night, the ground conductivity increases as the soil is replenished. The mean and variance of the ground conductivity decreases into the summer dry season, describing drier soil and smaller diel fluctuations as the summer progresses. Sapflow does not significantly decrease through the summer, however, suggesting use of a deeper water source to maintain sapflow in a time of soil moisture depletion. ERI successfully captured spatiotemporal variability of soil moisture on daily and seasonal timescales, and with further research could be used to monitor temporal changes in tree water content.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.identifierT 7813
dc.identifier.urihttp://hdl.handle.net/11124/20106
dc.languageEnglish
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2015 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.titleDetermining the influence of transpiration on soil moisture pathways using electrical resistivity imaging
dc.typeText
thesis.degree.disciplineGeology and Geological Engineering
thesis.degree.grantorColorado School of Mines
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)


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