RIVER DISCHARGE ESTIMATION USING RUNOFF GENERATED BY LAND SURFACE MODELS

Abstract

In this study, the characteristics of runoff generated by land surface models SiBUC and MRI-SiB were examined from river discharge view point. From the analysis result by using NHRCM 5km output data, it was found that the amount of runoff in SiBUC was higher compared to MRI-SiB. In MRI-SiB, the base runoff was more dominant than surface runoff, while in SiBUC was the opposite. The generated runoff from both model was given to a flow routing model 1K-FRM to conduct river discharge simulation. The 10-years-mean monthly river discharge analysis showed the different of discharge volume and timing of peak discharge from both models, which was due to different runoff amount and their characteristics.