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Open AccessArticle

Increase of Elderly Population in the Rainstorm Hazard Areas of China

by Pujun Liang 1,2,3, Wei Xu 1,2,3,*, Yunjia Ma 1,2,3, Xiujuan Zhao 1,2,3 and Lianjie Qin 1,2,3
State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs and Ministry of Education, Beijing 100875, China
Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2017, 14(9), 963;
Received: 10 July 2017 / Revised: 20 August 2017 / Accepted: 22 August 2017 / Published: 26 August 2017
(This article belongs to the Special Issue Human Health, Risk Analysis and Environmental Hazards)
In light of global warming, increased extreme precipitation events have enlarged the population exposed to floods to some extent. Extreme precipitation risk assessments are of great significance in China and allow for the response to climate change and mitigation of risks to the population. China is one of the countries most influenced by climate change and has unique national population conditions. The influence of extreme precipitation depends on the degree of exposure and vulnerability of the population. Accurate assessments of the population exposed to rising rainstorm trends are crucial to mapping extreme precipitation risks. Studying the population exposed to rainstorm hazard areas (RSHA) at the microscale is extremely urgent, due to the local characteristics of extreme precipitation events and regional diversity of the population. The spatial distribution of population density was mapped based on the national population census data from China in 1990, 2000 and 2010. RSHA were also identified using precipitation data from 1975–2015 in China, and the rainstorm tendency values were mapped using GIS in this paper. The spatial characteristics of the rainstorm tendencies were then analyzed. Finally, changes in the population in the RSHA are discussed. The results show that the extreme precipitation trends are increasing in southeastern China. From 1990 to 2010, the population in RSHA increased by 110 million, at a rate of 14.6%. The elderly in the region increased by 38 million at a rate of 86.4%. Studying the size of the population exposed to rainstorm hazards at the county scale can provide scientific evidence for developing disaster prevention and mitigation strategies from the bottom up. View Full-Text
Keywords: natural disaster risk; rainstorm; tendency; population exposure; China natural disaster risk; rainstorm; tendency; population exposure; China
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Liang, P.; Xu, W.; Ma, Y.; Zhao, X.; Qin, L. Increase of Elderly Population in the Rainstorm Hazard Areas of China. Int. J. Environ. Res. Public Health 2017, 14, 963.

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