汶川震区典型泥石流形成特征及运动特征研究——以大沟泥石流沟为例

Research of Formation Characteristics and Dynamic Characteristics of Wenchuan Earthquake Typical Debris Flow——Dagou Debris Flow for Example

查明了大沟泥石流的发育情况及泥石流沟谷特征,从而确定了大沟泥石流的形成特征,以利于分析预测其发展趋势;并通过计算确定了汶川震区典型泥石流的运动特征,这些结论对于如何经济合理治理大沟泥石流具有重要的现实意义。根据以上结果针对大沟泥石流可以制定一套有效的防治措施,建议在现有防治措施的基础上增设三道重力式拦砂坝,并在治理后采取生物措施对其进行综合防治,采用工程措施与生物措施相结合的综合防治对策。采取生物防治措施可以起到拦截降水、调节径流、护坡稳坡、增强土体的稳定性和抗雨水侵蚀能力的作用。

Find out the development condition and characteristics of debris flow cleuch of Dagou debris flow,To determine the formation of large debris flow characteristics,in order to facilitate trend analysis and forecast of its development;and determined the typical debris flow motion characteristics in Wenchuan earthquake by calculating,these conclusions has important practical significance on how to control a large debris flow economic rationality.According to the results for Dagou debris flow can develop an effective preventive measures.Proposed add three gravity debris dam on the basis of the existing control measures,and take biological measures after treatment,adopt comprehensive prevention and control measures which is the combination of biological measures and engineering measures.Biological control measures can be taken to play a block rainfall,regulate runoff,slope stability of slopes,and enhance soil stability and the role of resistance to rain erosion.