【摘要】 "5.12"地震形成的滑坡崩塌为泥石流提供了丰富的固体松散物质,严重威胁到交通、民房和安置点等的安全[1、2],成为灾区重建的重大隐患。本文以四川省绵竹市龙形沟泥石流为例,讨论5.12地震引发潜在泥石流地质灾害的调查评价方法。龙形沟流域属高山峡谷地貌,呈叶状,支沟众多,主沟未暴发过泥石流,但"5.12"地震后,现场调查发现流域内多达9条支沟暴发了泥石流。本文针对该类潜在泥石流沟谷的特点,在野外工作的基础上,分析其易发程度和发展趋势,计算其容重、流速、流量和冲击力等特征参数,对该类潜在泥石流沟谷的调查和防治具有一定实际意义。更多还原

【Abstract】 The landslide and alluvium accumulation during the "5.12" Earthquake offered abundant material as source of debris flow,which threatened the safety of traffic,civilian buildings,people’s life and property,and became the great hidden danger to the rebuilding work in earthquake-stricken area.This paper takes Longxing Gully for instance,discusses the investigation and prevention method to the potential debris flow disaster.Longxing Gully,shaped like a leave with many branch gullies,belongs to the alpine gorgegeomorphology,at the main gully there didn’t outbreak any debris,but there are as many as nine branch gullies,where the debris flow has been occurred.This paper considers the characteristics of potential debris flow,analyses its vulnerability and trend based on fieldwork and calculates the density,velocity,discharge and impulsive force of debris flow,and suggests preventive measures,which have great importance for prevention of potential debris flow.更多还原