Chapter
Apr 26, 2012
Estimation of Evaporation and Evapotranspiration during Nongrowing Seasons Using a Dual Crop Coefficient
Publication: World Environmental and Water Resources Congress 2009: Great Rivers
Abstract
Evapotranspiration and net irrigation water requirement estimates were updated in 2007 by Allen and Robison (2007; Allen et al., 2007) for agricultural areas in Idaho. ET calculation procedures were employed that use an updated procedure to calculate crop coefficients that considers the impact of surface wetting by irrigation and precipitation on total evapotranspiration. ET was calculated for daily, monthly and annual timesteps for 123 weather station locations across Idaho for complete, available periods of record. ET estimates were made for all times during the calendar year including winter to provide design and operation information for managing land application of agriculture, food processing and other waste streams and to provide full-calendar year estimates of E and ET for hydrologic studies and to estimate beginning of growing season soil water content.
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© 2009 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Professor of Water Resources Engineering, University of Idaho, 3793 N. 3600 E., Kimberly, ID 83341. E-mail: [email protected]
James L. Wright
Soil Scientist, (ret), USDA-ARS, 3793 N. 3600 E., Kimberly, ID 83341.
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