Coastal cities-wide estimation of daily class A pan evaporation from few hydrometeorological variables

Abstract

ABSTRACT This study investigates the accuracy of the experimental models in two standard and optimized cases using data from meteorological stations located on the northern and southern coasts of Iran. The results show that the spatial distribution / different hydrometeorological conditions are quite effective in the accuracy of the models. However, KNF and Papadakis lead to the most accurate estimation among the standard models. The optimization significantly increases all models' accuracy except Papadakis, indicating its remarkable robustness in coastal cities. Comparison between all models demonstrates that the Linacre-1994 optimal model has the best accuracy. Findings reveal that wind speed is the second variable affecting pan evaporation in coastal cities after the vapor pressure deficit. In addition, the form of wind speed inclusion in the Trabert model significantly affects its inaccuracy. Elevation and latitude variables do not affect estimating pan evaporation in coastal cities considering optimization findings.