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University of Nevada, Las Vegas (2010)

Temporal and spatial assessment of evaporation, transpiration, and soil moisture redistribution

Bird Brian

Titre : Temporal and spatial assessment of evaporation, transpiration, and soil moisture redistribution

Auteur : Bird Brian

Université de soutenance : University of Nevada, Las Vegas

Grade : Master of Science in Water Resources Management 2010

Résumé
At a native stand of creosote bush (Larrea tridentata) in North Las Vegas, a rainfall simulation study was conducted over a 12 month period from October 2005 to October 2006. Simulated rainfall occurred during the winter, spring, summer, and fall periods. Rainfall simulation systems were positioned on each of 12 plots, each containing a single creosote bush. Simulated rainfall events occurred at night with multiple short pulses designed to maximize infiltration while minimizing ponding. Yearly simulated rainfall amounts were set at 0, 15, 30 and 60 cm (replicated three times) and were approximately 0, 1.5, 3.0 and 6.0 times the natural rainfall. The cumulative reference evapotranspiration (ETref) was 156.7 cm and cumulative ambient precipitation was 7.9 cm. Soil and plant canopy surface to air temperature differentials (Ts-Ta and Tc-Ta) were assessed using an infrared thermometer (IRT). Significant differences were based on simulated rainfall treatment (P

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Page publiée le 23 octobre 2012, mise à jour le 30 octobre 2018