Construction and Test of WRF Model in Chinese Mainland

Based on WRF model, this paper constructs a mesoscale numerical weather forecast model covering Chinese Mainland, with a spatial resolution of 5km. Driven by ERA5 reanalysis data, long-term simulation experiments are carried out. We selected observation data from the National Meteorological Station of China to test and analyze the core forecast elements such as precipitation, temperature, and wind speed of the WRF model, and further verified the simulation ability of the model for typhoons, extreme precipitation, sustained drought, and total water resources in different water resource zones, obtaining relatively objective evaluation results. On this basis, based on WRF-Hydro, a regional distributed hydrological model in Chinese Mainland is constructed. The WRF-Hydro model is driven by the long-term simulation results output from the WRF model, and the runoff simulation data corresponding to major rivers in China are obtained. By comparing with the measured data, the validity of the WRF model built in this paper in hydrological simulation is verified, which provides a reference for the next step of operational application and improvement of the model.