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Utah State University (2005)

Vertical and lateral flow components of soil water fluxes following spring rainfall in a semiarid catchment

Kalra, Ajay

Titre : Vertical and lateral flow components of soil water fluxes following spring rainfall in a semiarid catchment

Auteur : Kalra, Ajay

Université de soutenance : Utah State University

Grade : Master of Science (MS) 2005

Résumé
This study investigates whether popular one-dimensional infiltration models, based on approximations of Richards equation, adequately represent the spatial and temporal patterns of soil moisture content in a hillslope. The study uses data collected from an intensive monitoring of hydrologic processes at Upper Dry Creek Experimental Watershed, a semiarid, snowmelt-driven catchment near Boise, Idaho. To understand the soil water fluxes, two approaches were taken. The first approach tests the prediction efficiencies of three infiltration one-dimensional models : Green-Ampt, Informed Green-Ampt and Richards equation (as in HYDRUS 1D). The second approach was comprised of two phases. While the first phase of the approach involved analysis of matric potential records, the second phase of the approach used statistical analysis of soil moisture and streamflow data to analyze whether the errors in predicting soil moisture by one-dimensional models have an embedded systematic error. Finally, a mass balance analysis was performed to predict the occurrences of groundwater flow through the bedrock fracture

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Page publiée le 1er mars 2015, mise à jour le 19 décembre 2018