Applicability of New Satellites Precipitation Products in Source Region of Yellow River：Using SWAT Model as an Example [新型卫星降水产品在黄河源区的适用性分析——以 SWAT 模型为例]

作者：Liu Z.; Yang M.^*; Wan G.; Cheng L.

来源：Plateau Meteorology, 2021, 40(2): 403-410.

DOI：10.7522/j.issn.1000-0534.2020.00024

• GPM
• satellite precipitation dataset
• Source region of Yellow River
• SWAT model
• TRMM

In this paper，two kinds of daily satellites precipitation products（TMPA 3B42 and IMERG-Final）are used to drive SWAT hydrological model. The results are compared and analyzed，and the applicability and simulation potential of the new satellite precipitation in the source region of Yellow River（SRYR）are evaluated. The results indicate that：（1）for large-scale watersheds，the results of sensitivity analysis and calibration of parameters for multiple sub-watersheds at the same time are not applicable to each station. Therefore，we choose to make sensitivity analysis and calibration of parameters in each station. Finally，the Nash-Sutcliffe efficiency coefficient（NSE）of the runoff simulation results of the three stations in the validation period are all above 0. 50，and the determination coefficients（R2）are all above 0. 60.（2）IMERG-Final products are better than TMPA 3B42 products in simulation results. Both of them can simulate the main trends of monthly runoff change in SRYR，but they have overestimated the peak values of runoff. The precision of the new satellite product（GPM）is higher than that of the predecessor satellite product（TRMM）. However，the accuracy of the GPM products in high altitude areas needs to be improved and further revised.

• 单位
  中国科学院大学; 冰冻圈科学国家重点实验室