Performance Evaluation of Mass Transfer-Based Reference Evapotranspiration Equations with FAO- 56 PM Model as Index at Tarairegion of Uttarakhand, India
Journal Title: International Journal of Agricultural Sciences and Veterinary Medicine - Year 2015, Vol 3, Issue 4
Abstract
In this study, the performance of nine mass transfer-based equations for estimating reference evapotranspiration (ET 0 ) was statistically analyzed in comparison to widely accepted Food and Agriculture Organization Penman-Monteith method (FAO-56 PM) model forsub-humid Udham Singh Nagar district of Uttarakhand. The higher values of Agreement index, coefficient of determination, correlation coefficient; and lowercalculated values of Root Mean Square Error, Mean Bias Error, Maximum Absolute Error, Percentage Error and Standard Error of Estimate between ET 0 values obtained with WMO and FAO-56 PM ET 0 methods observed on dailyand monthly basis confirms acceptability of WMO method. The ratio of ET 0 method/ET 0 FAO-56 PM was found best (almost near to 1.00) with Mahringer method.
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