甘肃陇南燕儿沟泥石流条件及其危险度评价

Forming conditions and quantitative assessment on Yan'er gully debris flow hazard in Longnan of Gansu

通过对燕儿沟流域的地质灾害调查,详细分析了该沟谷泥石流形成的地形条件、物源条件、水源条件,并对泥石流的运动学和动力学参数进行了分析计算,以便为后期的工程治理提供参考依据;结合该泥石流的发生规模和发生频率,对泥石流的危险度进行了评价,结果表示该泥石流属高度危险等级,计算结果与燕儿沟泥石流实际发生的灾情基本相符。

By geological survey of disaster in Yan＇er watershed,the article analyzes the formation conditions of the debris flow（ terrain conditions,provenance conditions,water conditions）. And calculate the kinematic and kinetic parameters of debris flow in order to provide reference for engineering management late. Combined with the size and frequency of debris flow,the danger of debris flow were evaluated,the results indicate that the debris flow is a highly dangerous level,and the result was basically consistent with the disaster actually occurred in Yan＇er debris flow.