岷江上游某建设场地山洪泥石流灾害危险性分析

Risk Analysis of Debris Flow and Flush Flood Disaster of One Building Field in Upper Reaches of Minjiang River

某建设场地位于岷江上游大沟流域,为山洪泥石流多发区。从主、支沟山洪泥石流特征、泥石流暴发规模及支沟泥石流对主沟山洪特征的影响等方面分析了场地可能遭受山洪泥石流灾害的危险性,并以此为基础对场地按危险程度进行了分区。结果表明,该场地主体位于基本无危险区,其建设计划是可行的。

A site of building is located in the Dagou drainage area, the upper reaches of Minjiang river, where the debris flow and flush flood often occur. The risk of the site bringing by, possibly, the debris flow and flush flood is analyzed from the aspects of the characteristics of the debris flow, flush flood and its embranchments, the scale of its breaking out, and the influence of flush flood character in the ravine brought by the debris flow of its embranchment. Then the site was divided into several sections by risk extent of the debris flow of its embranchment. The results show that the main body of the site lies in the no-hazard area, so the plan is feasible.