抄録
A distributed biosphere hydrological model with three layered energy balance snow melt module (WEB-DHM-S) and the Moderate Resolution Imaging Spectroradiometer (MODIS) derived snow cover data have been implemented to optimize the snowfall correction factor (SCF) for the correction of radar based snowfall within the framework of Shuffled Complex Evolution, University of Arizona optimization scheme. The optimal value of SCF is obtained for the minimum error between the simulated and observed runoff and between the simulated and MODIS derived snow cover area. The system is applied at Yagisawa dam basin of Japan to correct Radar-AMeDAS precipitation. The SCF is optimized at 3.27 in year 2003. This optimized SCF is validated in 2002, producing improved simulations of discharge and SCA. This approach can be applied to correct radar precipitation where satellite derived SCA are available.
