Hydrological Evaluation of Satellite-Based Precipitation Products in Hunan Province

The quality of satellite-based precipitation products including TMPA 3B42, IMERG-early, IMERG-final, and CMORPH-CRT, is evaluated by comparing with gauge observations in Hunan province China between 2017 2019. By using the outputs Dominant River Routing Integrated VIC Environment (DRIVE) model, hydrological applications gauge- are analyzed them streamflow observations. Furthermore, we conduct a case study considering Typhoon Bailu. It found that IMERG-final can produce better results compared to other three against gauge-based precipitation. In terms discharge simulations, provides most accurate results, followed IMERG-final. During Bailu, peak mean rainfall center (24.5°N–26°N, 111°E–114°E) occurred on 25 August 2019, whereas daily reached its one day later, suggesting lagged impact streamflow. From Taylor diagram, for estimating during respectively. Overall, has best performance application, performs among four products.