343-3 Measurement of Evaporation, Soil Moisture, and Soil Temperature During Surface Drying.



Wednesday, October 19, 2011
Henry Gonzalez Convention Center, Hall C, Street Level

Sang R. Lee, Riki Reichman, Scott R. Yates and Todd H. Skaggs, USDA-ARS, U.S. Salinity Laboratory, Riverside, CA
The coupled transport of liquid water, vapor, and energy in the surface soil layer influences a variety of hydrological and ecological process. Theoretical models of evaporation processes, based mainly on the work of Philip and deVries, are often in disagreement with experimental data collected on moderately dry soils. A major limitation to improving theory is inadequate measurement methods and technologies. In this study, we present data from a column study designed to provide detailed measurements of evaporation, soil moisture, and soil temperature during soil drying. The objectives are to both obtain detailed measurements of evaporation processes and to evaluate various technologies for potential use in field studies. In particular, the supplemental information gathered by this study will facilitate the application of Eddy covariance flux measurement to describe gaseous emissions from various surface soil layers.
See more from this Division: S01 Soil Physics
See more from this Session: Measurement and Modeling of near-Surface Soil Water and Energy Fluxes: II