Revised Advection-Aridity Evaporation Model

In this paper, a revised advection-aridity evaporation model is presented to estimate actual evaporation over short time periods. The revised model is applied and validated against an existing data set. The time series comparisons in a soybean site and a corn site reveal that this revised model shows good performance in characterizing the diurnal variation in evapotranspiration. The coefficient of determination for these two sites is 0.92 and 0.87, respectively. To demonstrate the improvement of this model, comparisons between the authors' newly developed model and the other two revised models are carried out. The quantitative measures show that this revised model represents an obvious improvement compared with the other two models. For all of the sites, the mean absolute difference is less than 65 W/m(2), the root-mean-square difference is less than 85 W/m(2), and the coefficient of determination is greater than 0.7. Overall, results from this analysis indicate significant improvements for actual evapotranspiration estimation with this newly developed method. DOI: 10.1061/(ASCE)HE.1943-5584.0000659. (C) 2013 American Society of Civil Engineers.