Diurnal Evapotranspiration Estimates in the Walnut River Watershed
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1998-10-01
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Abstract:Evapotranspiration is an essential component of the surface hydrological balance, but obtaining accurate estimates of the water vapor flux over large terrestrial areas can be difficult because of the substantial temporal and spatial variability in surface moisture conditions that can occur. This variability is often very . large in the Great Plains and other portions of the Mississippi River Basin. Nevertheless, variations in soil moisture content, groundwater levels, and runoff in streams and rivers cannot be fully assessed without some knowledge of evapotranspiration rates. Here, observations made at the Walnut River Watershed (WRW), which is near Wichita, Kansas, and has an area of approximately 5000 km2, are used to improve and test a modeling system that estimates long-term evapotranspiration with use of satellite remote sensing data with limited surface measurements. The techniques may be applied to much larger areas. As is shown in Fig. 1, the WRW is located in the Red River Basin and is enclosed by the southern Great Plains Clouds and Radiation Testbed (CART) of the U. S. Department of Energy’s Atmospheric Radiation Measurement (ARM) program.
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Content Notes:Extended Abstract for Preprint Volume and Presentation at 14th Conference on Hydrology
American Meteorological Society, 10-15 January 1999, Dallas, Texas
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