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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/nhess-2018-14
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
23 Feb 2018
Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Risk Zoning of Typhoon Disasters in Zhejiang Province, China
Yi Lu1, Fumin Ren2, and Weijun Zhu3 1Shanghai Typhoon Institute of China Meteorological Administration, Shanghai 200030, China
2State Key Laboratory of severe weather; Chinese Academy of Meteorological Sciences, Beijing 100081, China
3Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China
Abstract. Abstract: We analyze the characteristics of typhoon disasters and the factors causing them using precipitation and wind data at the county level in Zhejiang Province from 2004 to 2012. Using canonical correlation analysis, we develop an intensity index for the factors causing typhoon disasters and calculate a population vulnerability index for Zhejiang by principal components analysis. Combining these two indexes, a comprehensive risk index for typhoon disasters is obtained and used to zone areas of risk in Zhejiang Province. Southeastern Zhejiang Province is the area most affected by typhoon disasters. The frequency ratio of daily rainfall > 50 mm decreases from the southeast coast to inland areas and is at a maximum in the boundary region between Fujian and Zhejiang, which has the highest risk of rainstorms. Southeastern Zhejiang and the boundary region between Zhejiang and Fujian and the Hangzhou Bay area are most frequently affected by extreme winds and have the highest risk of wind damage. The population of southwestern Zhejiang Province is the most vulnerable to typhoons as a result of the relatively undeveloped economy in this region, the mountainous terrain and the high risk of geological disasters. Vulnerability is lower in the cities and coastal areas due to better disaster prevention and reduction strategies and a more highly educated population. The southeast coastal areas face the highest risk, especially in the boundary region between Taizhou and Ningbo cities. Although the inland mountainous areas are not directly affected by the typhoons, they are in the medium-risk category for vulnerability.
Citation: Lu, Y., Ren, F., and Zhu, W.: Risk Zoning of Typhoon Disasters in Zhejiang Province, China, Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2018-14, in review, 2018.
Yi Lu et al.
Yi Lu et al.
Yi Lu et al.

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Short summary
We analyze the characteristics of typhoon disasters at the county level in Zhejiang Province from 2004 to 2012. We established a comprehensive risk index and developed risk zoning for typhoon disasters in this region, which may give some reference for future disaster prevention. Some interesting results have been obtained. The risk of typhoon disasters decreases from coastal areas to inland regions. The index is a good reflection of the risk of typhoon disasters in each county.
We analyze the characteristics of typhoon disasters at the county level in Zhejiang Province...
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