Master of Science in Geoscience
Zhongbo Yu, Committee Chair
Michael J. Nicholl, Committee Co-Chair
First Committee Member
Michael, H. Young, Committee Co-Chair
Second Committee Member
Wanda J. Taylor
Graduate Faculty Representative
Number of Pages
Chloride concentration profiles to depths of 1 m were evaluated on a young alluvial fan in Eldorado Valley, NV. It was found that chloride beneath plant canopies were 11 to 222 times higher than adjacent (1 - 2 m away) bare soil locations. Two-dimensional numerical simulations using HYDRUS 2D/3D model were used to further explore the impact of plants on chloride transport. The simulation results indicated that lateral flow driven by root uptake concentrated chloride toward root zones, leading to the accumulation of chloride under plant canopies. Results also suggest that locally micro-topography can have a substantial impact on chloride migration, as runoff into locally low areas (swales) can push chloride deeper into the soil profile than in adjacent high areas (bars). Hence, the uneven distribution of chloride in microsites should be considered when select field sampling sites for paleoflux and age estimates using chloride mass balance method.
Bare soils; Chloride distribution; Chloride mass balance; Chloride transport; Eldorado Valley; Nevada; Micro-topography; Plant canopies; Root uptake; Root zones
Desert Ecology | Geology | Soil Science
Nie, Wenming, "Effects of plant uptake and micro-topography on chloride transport in arid soils" (2009). UNLV Theses, Dissertations, Professional Papers, and Capstones. 96.