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《Journal of Catastrophology》 2018-04
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Risk Assessment of Mountain Torrents Disaster in China Based on GIS

Ren Hongyu;Du Jun;Ding Wenfeng;Zhang Pingcang;Yangtze River Academy of Sciences,Yangtze River Water Conservancy Commission;Engineering Research Center for Mountain Torrent Geological Disaster Prevention and Control,Ministry of Water Conservancy;  
According to the spatial distribution characteristics of mountain torrent disasters in China,the risk assessment model of mountain torrent disasters in China was established based on natural disaster risk theory. Based on the comparative study of large-scale mountain torrent disaster risk assessment,the risk assessment index system of mountain torrent disaster is selected from the two aspects of external trigger factors which may cause the occurrence of mountain torrent disaster and disaster-bearing bodies which may suffer potential losses. Principal component analysis is used to extract the principal component of the risk index,AHP is used to determine the weight of each index. With the support of GIS,the distribution map of each factor index is made,and the quantitative analysis of the risk and vulnerability of mountain torrents in China is carried out. Finally,the results of risk assessment are compared with those of mountain torrent disaster prevention and control zones in China. The results show that the risk zoning of mountain torrent disaster is in good agreement with that of control zones. The high risk zones are basically distributed in the key mountain torrent disaster prevention and control zones in China. The future focus of mountain torrent disaster prevention and control can be attributed to the risk factors affecting the risk degree of mountain torrent disaster. Children and vulnerability factors.
【Fund】: 国家重点研发计划资助(2017YFC1502506);; 国家“十二五”科技支撑计划课题(2012BAK10B04);; 全国山洪灾害防治项目实施方案(2013-2015年)
【CateGory Index】: X43;TV87
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