青海省洪水镇大寨子村西山沟泥石流动力学特征及治理方案

Debris flow dynamic characters and governing scheme of Xishangou in Dazhazi village, Hongshui town, Qinghai province

西山沟泥石流位于青海省洪水镇大寨子村,其沟道纵坡降大,物源补给较丰富,汇水面积大,对泥石流沿线及下游村庄危害较大,属于高频易发性沟谷型泥石流。在野外地质勘查的基础上,本文从地形、物源、水源等方面较全面地分析了大寨子村西山沟泥石流形成的条件,查明了泥石流形成的关键因素。通过定量计算分析西山沟泥石流的动力学特征参数,得出两条沟分别属于小型和中型规模的泥石流沟,还有暴发泥石流的可能性。针对危害特征,提出了拦挡与排导相结合的工程治理措施。

Xishangou debris flow is located in Dazhaizi village,Hongshui town,Ledu District district,its Channel longitudinal gradient big,it has abundant loose sediment supply source,great catchment area,and might cause serious damage to it and the downstream villages,It is a high susceptibility to gully debris flow.On the basis of geology investigation,through analysis of landform,geological,provenance and rainfall,the key factors of Dazhazi village xishangou debris flow formation were identified.Through quantitative calculation and analysis of debris flow dynamic characteristic parameters,the two gullies belong to small and medium scale debris flow gully and there is the possibility of debris flow outbreak.For hazard characteristics,blocking and drainage combination engineering treatment measures is proposed.