四川省西昌大桥沟泥石流及其工程危害性评价

AN ASSESSMENT OF DEBRIS FLOW IN DAQIAOGUO,XICHANG,AND ITS HARMFUL NESS ON HYDROELECTRIC PROJECT

大桥沟位于四川省西昌市拟建官地水电站大坝下游。现对该沟沟口堆积扇的成因及流域内泥石流的发育特征及其形成条件作了详细研究 ,用地质地貌演化分析法 ,评价预测了泥石流的发展趋势及其危害性 ,分析了主沟爆发泥石流的可能性 ;并针对泥石流对官地水电站进出场施工公路及发电厂房尾水的危害性 。

Daqiaoguo is located at the lower reaches of Guandi hydropower station in Xichang, Sichuan Province. In this paper, the genesis of accumulational fan at the river mouth, the characteristics and formation condition of debris flow in the river valley were studies thoroughly. Geomorphic evolution method was used to evaluate and predict the developing tendency and harmfulness of debris flow, and to analyse the possibility of debris flow occurrence in the major gully. Corresponding countermeasures were proposed to deal with harmful debris flow on the working road and power station.