Comparison of Multi-satellite Rainfall Data in Runoff Model

This research was performed to analyze the Global Precipitation Measurement (GPM) 3IMERGHHE and the Tropical Rainfall Measuring Mission (TRMM) 3B42RT in a direct runoff model. The area studied was in Gendol River watershed in Indonesia between February 19th, 2017, and February 26th, 2017. The observed rainfall based on Automatic Rainfall Recorder (ARR) and observed water level based on Automatic Water Level Recorder (AWLR) are used to calibrate the excess rainfall by using the phi index method. The results showed that satellite data could describe rainfall spatially. The TRMM 3B42RT data distinctly propagated to streamflow simulations with a significant magnitude of peak flow. The correction of the satellite rainfall data effectively improved the direct runoff model. In general, the GPM 3IMERGHHE is more feasible compared to TRMM 3B42RT.