Comparison of Evapotranspiration Models for Estimating Reference Evapotranspiration in an Arid and semiarid Region, Northeast of Iran
Journal Title: Journal of River Engineering - Year 2014, Vol 2, Issue 10
Abstract
In this study, evapotranspiration (ET0) was determined by several models for Bojnord city in Khorasan province. Outputs were obtained from IMO (Iran Meteorological Organization) weather station, located in the Bojnordn, for all of these years. FAO Penman Monteith (FAO-56 PM) method has been accepted by many researchers and international institutes as the reference and Standard method. Accurate different methods were compared with FAO-56 PM method. Results show that Blaney-Criddle (BC) model were the best in light of mean biased error (MBE), root mean square error (RMSE) and maximum absolute error (MAXE).The mean values MBE, RMSE and MAXE computed -0.554, 0.690 and 1.429 mm.d-1 for BC, respectively. For all the years, ET0 rates were low in winter and fall and highest during the summer. Also, the maximum and minimum annual ET0 estimations by BlaneyCriddle and FAO-56 PM methods was in 2001 and 1996, respectively.
Authors and Affiliations
Mojtaba Mohammadi
Keywords
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