四川省都江堰市虹口乡红色村干沟泥石流特征及危险性评价

红色村干沟位于都江堰市虹口乡,"5.12"地震之后多次发生泥石流。2013年"7.9"特大暴雨后引发泥石流,摧毁沟口居民房屋,淹埋农田;沟内仍存在大量松散物源,沟口的居民安置点和公路仍受泥石流的威胁。笔者结合灾害应急调查资料,采用单沟泥石流危险性评价方法,对红色村干沟泥石流的形成条件、发育特征、易发程度和危险性进行分析,结果显示该沟泥石流易发程度为中等,危险性中等,对沟口居民生命财产和公路交通存在威胁。

Risk Assessment and Features of Gangou Debris Flow in Hongse Village,Hongkou Town,Dujiangyan of Sichuan Province

Gangou debris flow is located in Hongse village, Hongkou town of Sichuan province. A number of debris flows have occurred after the Wenchuan earthquake. Debris flow caused by the torrential rain in June 9 of 2013 destroyed the house of resident and flooded the fields; meanwhile, there is still a lot of loose material in the ditch, which will threaten the resettlement spots and road. Based on the material from the disaster emergency investigation and the risk evaluation method of the debris flow on single channel, this paper studies formation conditions, development characteristics, susceptible degree and risk of the debris flow. At last, the result shows that both the hazard susceptibility and fatalness are on an intermediate level, still posing a threat to life, property of local residents, as well as the surrounding traffic.