The relationship model between flood-hit population and rainstorm waterlogging risk index

• Published in: 暴雨灾害 Vol. 42; no. 1; pp. 79 - 87
• Main Authors: Xiaofang ZHAO, Ruiqin SHI, Guoping HONG, Yuehua ZHOU, Zhihong XIA, Liangmin DU, Hua XIANG
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Torrential Rain and Disasters 01.02.2023
• Subjects: disaster loss curve; flood-hit populations; return period; waterlogging risk
• ISSN: 2097-2164
• DOI: 10.12406/byzh.2022-223

Establishing the relationship model between the rainstorm waterlogging and flood-hit population is of great significance for the rapid assessment of the situation before, during, and after the disaster of rainstorm. Taking Hubei as an example, we established the rainstorm waterlogging risk index by using the meteorological data such as hourly precipitation, daily maximum precipitation, cumulative precipitation, and the continuous days of rainstorm, as well as the environmental data such as water system and elevation. Combined with the historical flood-hit population, we also established the disaster loss curve of the flood-hit population based on the waterlogging risk index. Then, we calculated the flood-hit population by using the threshold of waterlogging risk index according to the return period level. The results show that (1) the rainstorm waterlogging high-risk area in Hubei mainly locates in the eastern Jianghan Plain, followed by the south of southwestern Hubei and the southern Jianghan Plain. (2) By