Disaster Risk Assessment for Typhoons Landing in or Affecting Zhangzhou during 2011－2020

The analysis and assessment of typhoons that made landfall in or affected Zhangzhou from 2011 to 2020 reveal that typhoons mainly affect Zhangzhou from July to September. In recent years, the number of typhoons has decreased, and the timing of their impact has been gradually postponed. The areas with the high comprehensive risk levels of typhoon disaster are located along the coast, on the windward slopes of major mountain ranges, and at river mouths and other special topographical locations. Typhoons affecting Zhangzhou can be mainly divided into three categories based on their tracks. Type Ⅰ typhoons make landfall in Guangdong, which have the highest frequency of impact and mostly bring precipitation from the outer core or peripheral convection. The high risk areas are mainly located in the central and southern districts or counties, especially around Wushan Mountain in Yunxiao and Liangshan Mountain in Zhangpu. Type Ⅱ track-turning typhoons have the least wind-rain impact in Zhangzhou. Type Ⅲ typhoons make landfall in Fujian and Zhejiang, which have the lowest frequency of impact, but the highest risks of heavy rain and combined wind-rain. Their distribution is the widest and most dispersed.