四川凉山州越西县打虎沟泥石流风险评价  

Risk Assessment of Debris Flow in Dahu Gully of Yuexi County of Sichuan

作　　者：杨宗佶[1] 乔建平[1] 宋书志[1] 徐小飞[1] 

机构地区：[1]中国科学院水利部成都山地灾害与环境研究所

出　　处：《水土保持研究》2007年第2期46-49,共4页Research of Soil and Water Conservation

基　　金：2004DFB01100科技部国际科技合作重点项目:中科院研究所前沿创新项目资助

摘　　要：打虎沟泥石流位于越西县城,发育于越西县城以西,由西向东长约3 km,流域面积约1.3 km2。由于汇水面积较小,固体碎屑物源储量不大,最大一次堆积量仅1万m3,属于小型泥石流。但因其出口就在县城东边,居民密集,危害严重。运用泥石流风险评价理论,结合泥石流的危险度评价和易损度评价,综合打虎沟泥石流危险度评价(H单=0.388)和灾害的易损度评价(V单=0.98),运用自然灾害风险度模型,得出了打虎沟泥石流的风险度为0.38,为高风险泥石流沟。the debris flow in Dahu gully is on the east part of Yuexi County, it is 3 km long and the drainage area is only 1.3 km^2 , and the reserve of the deposit is less than 104 m^3 , which attributes to minitype. Nevertheless,the gully abut against the residential area, and threaten the community in the area. The risk assessment of the debris flow is analyzed on the base of assessment of hazard and vulnerability, and it is concludes that the risk degree of the debris flow is 0.38, which attributes to high risk degree.

关 键 词：泥石流 危险度 易损度 风险度 打虎沟 

分 类 号：P642.23[天文地球—工程地质学]