Abstract
ABSTRACTA typhoon is one of the most dangerous natural disasters in the Yangtze River Delta of China. Based on an integrated assessment of the disaster risk elements, including hazard factor, exposure, and vulnerability, the risk level of a typhoon disaster for the Yangtze River Delta as a county-level unit was ultimately determined. The result shows that the risk levels of typhoon hazard factor are gradually weakened from the southeastern coastal areas to the northwest, and the highest-risk areas are located in the southeastern coastal regions. Due to many towns, dense population, a developed economy, and a huge disaster-bearing body in the north of the Yangtze River Delta, which is also located on the plain for a high susceptibility to a disaster-breeding environment, the exposure risk level in the northern areas is higher than in the south. The most vulnerable counties are Chun'an, Xianju, Tiantai, and Sanmen in Zhejiang Province, and Baoying and Xinghua in Jiangsu Province. The highest-risk areas for a typhoon disaster are primarily located in the southeastern coastal areas of Zhejiang Province, Hangzhou Bay, and Shanghai near the Yangtze River Estuary, while the lowest-risk areas are distributed in the western portion of Hangzhou and the northern area of the Yangtze River Delta.
Highlights
A typhoon is a natural disaster that causes casualties at a slightly lower level than floods in the world, and a typhoon is one of the most serious natural disasters in China
The typhoon disaster risk levels in the prefecture-level cities of Zhejiang Province are generally higher than the typhoon disaster risk levels of Jiangsu Province, especially in Ningbo, Zhoushan, and Taizhou Cities, which are in the southeastern coastal regions of the Yangtze River Delta, and the areas of the highest risk level all account for above 25%
Risk assessment of typhoon disasters for the Yangtze River Delta of China is conducted by an integrated analysis of hazard factor, exposure, and vulnerability to typhoon disaster
Summary
A typhoon is a natural disaster that causes casualties at a slightly lower level than floods in the world, and a typhoon is one of the most serious natural disasters in China. Cyclones in China shows that from 2000 to 2014, on average, typhoon disasters caused economic losses of 45.784 billion Yuan (RMB), 244 deaths, and affected 37.77 million of people per year. According to data from the Yearbook of Meteorological Disasters in China of 2014, super typhoon ‘Fitow’ landing in Fuding County in southeastern China’s Fujian Province on 7 October 2013 caused economic losses worth over 63.1 billion Yuan and 11 deaths, and 121.6 billion people were affected. We investigate the typhoon disaster for the Yangtze River Delta, located in the southeastern coastal region of China, which is severely affected by typhoons in the summer and autumn. The rapid economic development and a sharp increase in population exacerbate the risks caused by the increased typhoon disasters in the Yangtze River Delta. To explore the measurement of risk assessment of typhoon disasters, to identify regions of high risk and to provide scientific support for typhoon disaster prevention and mitigation, methods based on the geographic information system (GIS) were used to assess the typhoon disaster risk in the Yangtze River Delta
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