EXPERIMENTS ON IMPACT-BASED FORECASTING AND RISK-BASED WARNING OF TYPHOON IN CHINA

Typhoon is one of the disastrous weather systems that usually occur in summer and autumn in China's coastal regions. Gales and rainstorms brought by typhoon can directly cause serious loss in economy and also induce storm surge, flash flood, mud-rock flow, landslide and other secondary disasters. This article studies the impact of collapsing force of typhoon gale and the risk-based warning of typhoon rainstorm. By calculating the accumulated wind pressure and the designed wind load of bearing walls of low-rise building in coastal region, we define the damaged building index. In addition, four steps for the risk-based warning or impact forecasting for small and medium-sized river basins, flash flood, mud flows and landslides caused by Typhoon rainstorm are introduced, which include understanding vulnerability of disaster carriers, developing risk thresholds of disasters, improving the accuracy of QPE/QPF and the risk assessment skill.