Hazard Assessment of Typhoon on the Southeast Coast of China Using Grid Fixed-Point Method

Proceedings

article

Yuhuan Yin¹  Guirong Xiao¹ 

[1] The Academy of Digital China ,(Fujian), Fuzhou University;Key Laboratory of Spatial Data Mining and Information Sharing of Ministry of Education, Fuzhou University

关键词: typhoon hazard assessment;    wind field simulation;    wind speed estimation;    return period;   

DOI  :  10.3390/IECG2022-14263

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

Typhoon hazard assessment is the basis of loss estimation and disaster prevention and mitigation. This study investigates the use of the grid fixed-point method to assess typhoon hazards. We conducted experiments on the southeast coast of China based on site data. In this paper, we first divided this study area into 0.25° × 0.25° grids by using the grid fixed-point method, and performed wind field simulation using each grid center point as the study point that was based on typhoon track data from 1960–2019. Next, we performed 50 and 100-year wind speed estimation of the return period by constructing the 60-year wind speed extreme value sequence of the grid center point and using the extreme value distribution function. At last, we implemented the discussion regarding spatial distribution characteristics of typhoon disasters. Our results show that the wind speed changes greatly and that there is a certain gradient change in the near coastal areas. Moreover, we can see that wind speeds began to weaken rapidly near inland, reaching a plateau in inland. Furthermore, the island has a higher wind speed compared with other areas. We can conclude that the proposed methods have a high potential for assessing typhoon hazards from station data.

【 授权许可】

CC BY