四川熊家沟泥石流灾害研究

Research on the disaster of Xiongjia Gully Debris Flow in Sichuan

熊家沟位于茂县石大关乡,岷江左岸。2008年"5.12"汶川大地震发生后,熊家沟流域内产生大量的崩滑体,物源丰富,之后又在强大雨水启动沟道及两侧松散堆积物作用下,冲毁各支沟内的拦挡坝,最终溃决形成规模巨大的过渡性泥石流。在熊家沟泥石流灾害现场调查的基础上,首先分析了熊家沟泥石流成因;其次给出了表现熊家沟泥石流的一些常规指标,最后对泥石流的发生频率和发展阶段进行预测分析。

Xongjia gully is located in Shidaguan Country,Maoxian County,the left bank of Minjiang River.A large number of collapse sliding bodies with rich source are produced in Xiongjia gully after the big Wenchuan'5.12'earthquake in 2008.Then all blocking dams in each tributary were washed away acted by strong rain starting channel and the loose deposits on both sides.Eventually,the huge scaled transitional debris flow gully was formed by outburst.On the basis of field investigation,formation of Xiongjia gully debris flow is analyzed firstly.Secondly,the author gives some general indicators to the performance of Xiongjia gully.Finally,the frequency of debris flow and development stage are predicted and analyzed.