Assessment on the hazard of flash flood disasters in China

作者：Zhao Gang; Pang Bo; Xu Zongxue^*; Wang Zifeng; Shi Rong

来源：Journal of Hydraulic Engineering, 2016, 47(9): 1133-1142 and 1152.

DOI：10.13243/j.cnki.slxb.20150501

• Assessment index
• China
• Flash flood
• Hazard areas
• Quantitative assessments
• Small-scale floods
• Spatial variations
• Variable fuzzy set

The hazard area of flash flood disaster in China was identified, and the assessment index was proposed on the basis of the characteristics of flash flood disasters in this study. The variable fuzzy set model was used to evaluate the hazard of flash flood disaster with 1km ×1km of resolution in China,and the spatial variation of hazard was analyzed. The results showed that hazard areas accounted for two thirds of the land area in China,in which the high-hazard areas of flash flood disasters accounted for 19.95%,and the extremely high hazard areas accounted for 3.92%. The top five provinces with great ratios of high-hazard areas among the 33 provinces (cities,autonomous regions) in China are Hong Kong,Fujian,Guangxi, Guizhou and Chongqing,which are all flash flood disaster-prone areas;Zhejiang,Hubei,Sichuan and other areas are vulnerable to the impact of small-scale flood disasters. The result objectively reflected the spatial variation of flash flood in China and could provide scientific support for quantitative assessment of flash flood disasters and disasters regionalization.

• 出版日期2016