Updating Class A pan coefficients (Kp) for estimating reference evapotranspiration (ETo) in the humid tropical region of Kerala
Keywords:
Evaporation, Penman-Monteith method, Pan coefficientAbstract
Evapotranspiration and evaporation are important parameters in water resource management and environment studies. This paper analyses six models for estimating pan coefficient (Kp) values in the humid tropical zone of Kerala. Estimated pan coefficients were not statistically accurate enough to be used for pan-to-ETo conversion. A significant increasing trend was observed for pan coefficient, whereas for evaporation and evapotranspiration, significant decreasing trends were observed over time. For the humid climate condition, the best Kp value for estimation of ETo is the constant value method and this constant value of Kp is to be updated for different climatic conditions.Downloads
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