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碉楼沟泥石流沟为西苏角河左岸的一级支流,位于四川省雷波县西侧,流域面积0.85km~2,主沟长度1.6km,纵比降504.4‰。碉楼沟流域属构造侵蚀高中山地貌,呈叶状,支沟众多,主沟较少暴发泥石流。2015年5月7日碉楼沟暴发山洪灾害,造成8人死亡和严重财产损失,并对下游马颈子场镇居民的生命财产安全构成了威胁。在地质勘查的基础上,分析泥石流基本特征、形成条件,计算泥石流的重度、流速、一次泥石流总量等动力学参数。结合碉楼沟泥石流的特征和场镇社会、经济可持续发展的需要,提出防治方案,对该类泥石流沟谷的调查和防治具有一定实际意义。
The Diaoyuangou debris flow ditch, a tributary of the left bank of the West Sujiao River, is located on the west side of Leibo County in Sichuan Province. Its catchment area is 0.85km ~ 2 with a main trench length of 1.6km and a vertical ratio of 504.4 ‰. Diaolou Gully basin is a structural erosion of high mountain landscape, was leaf-shaped, numerous ditches, the main groove less outbreak of debris flow. On May 7, 2015, the outbreak of towers and dams triggered a flash flood disaster, killing 8 people and causing serious damage to property. It also threatened the lives and property of residents in the lower town of Zhenzijichang. Based on the geological survey, the basic characteristics of debris flow are analyzed, the formation conditions are established, and the dynamics parameters such as the debris flow velocity, flow rate and the total amount of debris flow are calculated. Combined with the characteristics of debris flow in Diaolou Gully and the need of social and economic development in the town and town, this paper puts forward the prevention and cure plan, which is of practical significance for the investigation and prevention of such debris flow valleys.