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四川石棉县简槽沟为一条典型泥石流沟道,区域上具备泥石流形成的孕灾地质环境背景,流域内具备泥石流产生的地形地貌与物源聚集特征。简槽沟泥石流可分清水区、形成区、流通-堆积区3个区域。由于简槽沟泥石流形成是由形成区密集崩滑体提供并参与物质运移,以远程碎屑流的形式沿程堆积扩散并延伸至沟口,所以,流通区与堆积区不明显,与常规泥石流分区略有区别。通过流域物源调查,简槽沟物源为崩滑堆积物、沟道堆积物、坡面侵蚀物。流域内共有松散固体物质总量为13.784×10~4 m~3。可能参与泥石流的物源量约3.154×10~4 m~3,沟道两侧的崩滑堆积物为泥石流的主要补给物源,占泥石流活动量的86.7%。简槽沟泥石流为高频—暴雨—崩滑—沟谷型稀性泥石流、易发、活动性强、中型潜在危险性,进行工程治理是十分必要的和紧迫的。针对简槽沟泥石流物源集中且丰富、流通区不明显、堆积区建筑物密集、沟口过流断面狭窄的特点,工程治理以中游拦挡物源、下游排泄倒流的措施,并遵循以防为主、防治结合、综合治理的原则。
Jianxuogou, Shimian County, Sichuan Province is a typical debris flow channel with the geological background of pregnant women formed by debris flow in the area. The topography and geomorphology of source rocks in the drainage basin are characterized by debris flow. Shallow gully debris flow can be divided into water area, forming area, circulation - accumulation area 3 areas. As the formation of the Jianghougou debris flow is provided by the dense landslide bodies in the formation area and participates in the transport of matter, it accumulates and spreads along the course of the remote debris flow and extends to the Mizoguchi. Therefore, the circulation area and the accumulation area are not obvious, Debris flow slightly different. Through the investigation of provenance in the river basin, the source of the simple trenches is the landslide deposits, channel deposits and slope erosion. The total amount of loose solid material in the basin is 13.784 × 10 ~ 4 m ~ 3. The possible source of debris flow is about 3.154 × 10 ~ 4 m ~ 3. The landslide deposits on both sides of the channel are the main supplies of debris flow, accounting for 86.7% of the debris flow activity. It is very necessary and urgent that the debris flow in Jianghou Gully is high frequency - heavy rain - collapse - slippery - valleys thin dilute debris flow, easy to be active, strong potential and medium potential danger. In view of the characteristics of the source and debris flow in the Jianghougou debris flow are concentrated and rich, the circulation area is not obvious, the buildings in the accumulation area are dense and the flow passage section is narrow in the Mizoguchi area, Lord, combination of prevention and treatment, the principle of comprehensive management.