Estimation of Evapotranspiration
Tuesday, December 6, 2016: 3:30 p.m.
N201/N202 (Las Vegas Convention Center)
Kendall DeJonge
,
Agricultural Engineering, Water Management Systems Research, Fort Collins, CO
Estimation of evapotranspiration (ET) in crops is important for the purposes of irrigation scheduling, water rights transfers, and yield prediction. This presentation uses the Limited Irrigation Research Farm in northern Colorado as a research-based example of how ET can be quantified. Main focus will be on FAO-56 standardized crop coefficient methods, but other methods will be discussed such as water balance, energy balance, lysimetry, and sap flow. Additional practical emphasis will cover the practical, legal, and physiological differences between applied water and consumed water (i.e., ET).
Handout
Kendall DeJonge, Agricultural Engineering, Water Management Systems Research, Fort Collins, CO
KENDALL C. DEJONGE, Agricultural Engineer, USDA-ARS, Fort Collins, CO. Dr. DeJonge received B.S. and M.S. degrees in Agricultural Engineering from Iowa State University, and a Ph.D. degree in Civil Engineering from Colorado State University. He is currently a research scientist in the USDA-ARS Water Management Research Unit, working in the areas of agricultural water management and quantification, limited irrigation management, evapotranspiration, crop water stress, numerical modeling (including crop growth, hydrological, and environmental), and ground-based remote sensing. He is author and co-author of several refereed papers which have been published in journals such as Agricultural Water Management, Irrigation Science, Transactions of the ASABE, and Ecological Modelling, is an Associate Editor for the ICID Journal Irrigation and Drainage, was a former Chair of the Evapotranspiration Measurement and Modeling Community in the American Society of Agronomy, and is an associate faculty member in Civil and Environmental Engineering at Colorado State University. Prior to his graduate work at CSU, Dr. DeJonge worked for two years as a Hydraulic Engineer for the U.S. Army Corps of Engineers in Omaha, Nebraska, and he is a registered Professional Agricultural Engineer (P.E.) in the State of Nebraska where he grew up on an irrigated farm. He is a member of ASABE (American Society of Agricultural and Biological Engineers, ASA (American Society of Agronomy), SSSA (Soil Science Society of America), and USCID (United States Committee on Irrigation and Drainage). His research goals are to develop practical technology that will help farmers make managements decisions resulting in efficient and productive water use.
