Application of MSWEP Precipitation Product in Niyanghe River Basin
In order to explore the application of MSWEP satellite precipitation product in ungagued regions,the Niy-anghe River Basin was taken as the research area.The satellite precipitation data at 4 stations in the basin were obtained by bilinear interpolation,and the accuracy of MSWEP precipitation data at different time scales was evaluated with refer-ence to the measured precipitation data at the stations.The mean bias correction method and the correction method based on spatial distribution model were used to correct all the satellite grid precipitation data in the research area.The original and corrected satellite precipitation data were applied to drive SRM snowmelt model and simulated the runoff process at the Gengzhang station from 2002 to 2015.The results reveal that the corrected precipitation data improved the precision of runoff simulation,and the result of spatial distribution model was better.The determination coefficient of the verifica-tion period is between 0.70 and 0.76,and the relative error of runoff volume is between 1.62%and 7.87%.It shows that the MSWEP has high applicability in Niyanghe River Basin.The study can provide references for the study of precip-itation and hydrological simulation in ungagued regions which are similar to the Niyanghe River Basin of hydrological and meteorological conditions.
Niyanghe River Basinungauged regionMSWEP satellite precipitation productSRM snowmelt model
万方数据
维普
