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上田镇沟位于卡拉水电站坝址下游,地形坡度陡峻,高差大,汇水条件好,沟内固体松散物源丰富,容易引发泥石流。现场勘查将其物源条件概括为四类:沟床堆积物源、沟道两侧崩滑堆积物源、坡面侵蚀物源、人工弃渣物源。分析该区泥石流的形成条件和流体动力学参数,对泥石流的发展趋势和危险性进行预测和评价。结果表明,泥石流形成条件充分,处于发展期,危险性中等。研究成果为卡拉水电站建设中泥石流的防治工程提供依据。
Located in the lower reaches of the dam site of Kala Hydropower Station, Shangtian Zhengou is steep with steep terrain, large elevation, good water catchment conditions and rich source of loose solids in the ditch, which can easily lead to debris flow. Site survey will be the source of its conditions are summarized into four categories: source of ditch bed deposits, landslides on both sides of the source of sediment deposition, slope erosion source, artificial residue source. The formation conditions and hydrodynamics parameters of debris flow in this area are analyzed to predict and evaluate the development trend and risk of debris flow. The results show that the formation conditions of debris flow are sufficient, in the development stage, the risk of medium. The research results provide the basis for the prevention and cure of the debris flow in the construction of Kala Hydropower Station.