基于不同降水产品的WRF-Hydro模式径流模拟——以漳河流域为例

以漳河流域为研究区域，以CMORPH卫星-地面自动站-雷达三源降水融合数据和ERA5再分析降水资料为WRF-Hydro模式的输入，进行径流模拟，对比分析模拟径流与实测径流的差异，探讨基于两种降水数据的WRF-Hydro模式在漳河流域的径流模拟效果。结果表明:三源降水融合数据的径流模拟效果较优，纳什系数均达到0.7以上，模拟径流与实测径流过程吻合较好；采用三源降水融合数据和ERA5再分析降水资料率定WRF-Hydro模式，以ERA5再分析降水资料为输入，径流模拟结果都不佳；总体而言，三源降水融合数据与WRF-Hydro模式耦合能够较好地模拟漳河流域径流过程。 

APPLICATION OF WRF-HYDRO FOR RUNOFF SIMULATION BASED ON DIFFERENT RAINFALL PRODUCTS: TAKING ZHANGHE RIVER BASIN AS AN EXAMPLE

Taking Zhanghe River Basin as the study area, the present study used the high-resolution radar-satellite-gauge merged precipitation products and reanalysis precipitation data from ERA5 as input for the WRF-Hydro model for runoff simulation. To explore the accuracy of runoff simulation in Zhanghe River Basin based on the WRF-Hydro model of two precipitation data, we compared and analyzed the difference between simulated runoff and observation runoff. The results show that the three-source merged precipitation products perform better with the Nash efficiency coefficient above 0.7, and the simulated hydrological process curves agree well with the observed hydrological process curves. With the three-source merged precipitation products and the ERA5 reanalysis data calibrated to the WRF-Hydro model, the simulation results are not satisfying with the ERA5 reanalysis data as input. In general, the three-source merged precipitation products combined with the WRF-Hydro model can better simulate the runoff process in the Zhanghe River Basin.