冲门口泥石流危险度评价

泥石流是山区常见的地质灾害之一,研究其危险度对防灾减灾、抗灾决策和保障人民生命财产安全具有重要的意义。贵州毕节何官屯镇大渔洞村冲门口住有209户862人及善啓第三希望小学师生325人,人口密集,危害严重。本文应用灰色关联分析法,在前人研究的基础上,建立泥石流危险性评价模型,确定了各评价因子的关联度及其权重,进一步通过计算得出冲门口泥石流危险度为0.499,属中度危险,结果证明在暴雨、暴雪等外在条件作用下,可发生中等规模的泥石流,与实际较吻合。

Risk degree assessment of debris flow at Chongmenkou in Guizhou province

Debris flow is one of the geologic hazards which often aroused in mountain area.Study on the risk degree of debris flow is very important for prevention,mitigation and resistance decision-making and protection people's life and property safety.There are 209 households with 862 persons in the accumulation area and 325 teachers and students in Shanqi hope primary school,who are inevitably threaten in Dayudong Village,Hegua ntun Town,Bijie City,Guizhou Province.Based on previous studies,the gray correlation analysis method is utilized to establish a risk assessment model of debris flow in this paper.Relevant degree and the specific weight of each index were studied.Based on calculation,the risk degree of the Chongmenkou debris flow is 0.499,which is attributed to moderate risk degree.Analysis result shows that the Chongmenkou debris flow can break out on the external conditions,such as rainstorm and blizzard.