气候变化领域集成服务门户(CCPortal): Changes in Population Exposure to Rainstorm Waterlogging for Different Return Periods in the Xiong'an New Area, China

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DOI	10.3390/w16020205
	Changes in Population Exposure to Rainstorm Waterlogging for Different Return Periods in the Xiong'an New Area, China
	Chen, Jiani; Wang, Yanjun; Chen, Ziyan; Si, Lili; Liu, Qingying; Jiang, Tong
发表日期	2024
EISSN	2073-4441
起始页码	16
结束页码	2
卷号	16 期号:2
英文摘要	In the context of global climate change and urban expansion, urban residents are encountering greater rainstorm waterlogging risk. Quantifying population exposure to rainstorms is an important component of rainstorm waterlogging risk assessments. This study utilized a two-dimensional hydrodynamic model to simulate the inundation water depth and inundation area resulting from rainstorms, with return periods of 5, 10, 50, and 100 years, in the Xiong'an New Area, and overlaid the gridded population data in 2017 and in 2035 under SSP2 to assess the change in population exposure. The results show that the average inundation depth and area increase were from 0.11 m and 207.9 km(2) to 0.18 m and 667.2 km(2) as the rainstorm return period increased from once in 5 years to once in 100 years. The greatest water depths in the main urban areas were mainly located in the low-lying areas along the Daqing River. The total population exposed to rainstorm waterlogging for the 5-, 10-, 50-, and 100-year return periods was 0.31, 0.37, 0.50, and 0.53 million, respectively, in 2017. However, this is projected to rise significantly by 2035 under SSP2, increasing 2-4-fold compared with that in 2017 for the four return periods. Specifically, the projected population exposure is expected to be 0.7, 1.0, 1.8, and 2.0 million, respectively. The longer the return period, the greater the increase in population exposure. The proportion of the population exposed at the 0.05-0.2 m water depth to the total population exposure decreases as the return periods increases, whereas the proportion changes in the opposite direction at the 0.2-0.6 m and >0.6 m depth intervals. Spatially, high-exposure areas are concentrated in densely populated main urban regions in the Xiong'an New Area. In the future, more attention should be paid to densely populated low-lying areas and extreme recurrence rainstorm events for urban flood-risk management to ensure population safety and sustainable urban development.
英文关键词	return periods; rainstorm waterlogging; population exposure; FloodArea model; Xiong'an New Area
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
WOS类目	Environmental Sciences ; Water Resources
WOS记录号	WOS:001152945900001
来源期刊	WATER
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305282
作者单位	Nanjing University of Information Science & Technology
推荐引用方式 GB/T 7714	Chen, Jiani,Wang, Yanjun,Chen, Ziyan,et al. Changes in Population Exposure to Rainstorm Waterlogging for Different Return Periods in the Xiong'an New Area, China[J],2024,16(2).
APA	Chen, Jiani,Wang, Yanjun,Chen, Ziyan,Si, Lili,Liu, Qingying,&Jiang, Tong.(2024).Changes in Population Exposure to Rainstorm Waterlogging for Different Return Periods in the Xiong'an New Area, China.WATER,16(2).
MLA	Chen, Jiani,et al."Changes in Population Exposure to Rainstorm Waterlogging for Different Return Periods in the Xiong'an New Area, China".WATER 16.2(2024).