【摘要】 2013年"4·20"芦山地震后,地震重灾区小流域泥石流灾害频繁发生,对地震灾区人民以及灾后恢复重建工作带来严重危害。为进一步查清芦山震区泥石流灾害的一般特征及危害程度,本文以位于雅安市天全县大叶龙沟泥石流作为研究对象,分析了大叶龙沟泥石流流域特征、形成条件及形成机制,在此基础上计算了泥石流动力学特征,并对其危险度进行了定量的评价。结果表明:大叶龙沟泥石流容重为1.75 t/m3,属于粘性泥石流;危险度为0.37,属于中等危险。更多还原

【Abstract】 After the Lushan earthquake of 2013, small watershed debris flows occurred frequently in earthquake stricken area,which have caused serious damages. To investigate normal characteristics and degree of damage further of small watershed debris flows in Lushan earthquake stricken area,this article analyzed Dayelong Ditch debris flows’ characteristics,conditions,mechanism of formation. The dynamic characteristics was calculated and the risk assessment was accessed. Results show that the density of Dayelong ditch ’s is1. 75 t / m3,belongs to viscous debris flow. Risk assessment is 0. 37,which belongs to moderately dangerous.更多还原