坡面泥石流起动模型研究  

The Study on the Numerical Model of Debris Flow on the Slope

作　　者：张万顺[1] 乔飞[1] 崔鹏[2] 彭虹[3] 陈晓清[2] 

机构地区：[1]武汉大学资源与环境科学学院,武汉430079 [2]中国科学院成都分院,成都610041 [3]武汉大学水利水电学院,武汉430072

出　　处：《水土保持研究》2006年第4期146-149,共4页Research of Soil and Water Conservation

基　　金：国家杰出青年科学基金资助项目(40025103);国家"973"计划资助项目(2002CB412300)

摘　　要：针对单一坡面泥石流起动模型进行研究。基于土壤动力学理论、土壤下渗理论和土壤水动力学理论,以及土体含水率变化引起土体抗剪切应力变化的物理机理,提出了坡面泥石流起动模式。在此基础上,结合传统分布式水文模型理论,建立了分布式坡面泥石流起动模型。模型应用于云南蒋家沟典型坡面泥石流研究,能够预测坡面泥石流起动的时间、部位和起动量,进行多时段模拟坡面泥石流入沟流量过程线,模拟结果体现了泥石流发生阵发性、不连续性、滞后性的特征,这与实际观测情况吻合,表明应用该模型研究坡面泥石流的起动是可行的,能够为进一步的泥石流数值模拟提供依据。The model of the initiation of debris flow on the single slope is studied. Based on the theory of dynamic of soil, soil infiltration, and the physical mechanism of soil movement caused by percent moisture content, the mode of the initiation of debris flow on the slope is proposed. Then, combining this with the theory of distributed hydrological model, the numerical model of debris flow on the slope is developed and applied to Jiangjia ravine in Yunnan Province. The model is used to predict the time and position of the initiation of debris flow, and to model the continuous flow rate of debris flow. The results agree well with the measured characteristic of debris flow, which shows that it is leasable to model the debris flow initiation with this model, and the model can give facts for the future study of the numerical simulation of debris flow in the whole watershed.

关 键 词：坡面 泥石流起动 土体含水率 土体应力 分布式模型 云南 东川蒋家沟 

分 类 号：P642.23[天文地球—工程地质学]