泥石流堆积过程数值模拟及防灾效益评估方法

根据动量守恒和质量守恒原理 ,研究建立了泥石流堆积过程的数学模型 ,运用有限差分法求解数学模型 ,用以模拟泥石流堆积的动态过程。在此基础上 ,结合云南省东川市深沟泥石流堆积区的实际情况 ,对泥石流灾害的危险范围和程度进行了分析评价 ;结合各类受灾体经济损失评价 ,对比防灾工程造价 ,进行了减灾效益分析评价。

NUMERICAL SIMULATION FOR PROCESS OF DEBRIS FLOW DEPOSIT AND EFFECTIVENESS EVALUATION METHODS OF DISASTER PREVENTION

In this paper, the dynamic process of debris flow deposit is studied by using numerical simulation method which applies a foundation to forecast the damage degrees and the scope of debris flow disaster. With setting up the mathematics model for describing the process of two dimensional debris flow,the continuity equation based on the law of conservation of mass is developed, and the momentum equations by the law of conservation of momentum are established. Associated with damage and loss evaluation of calamitous objects in Dongchuan City of Yunnan Province,the effectiveness analysis of disaster prevention is carried out.Furthermore,the countermeasures and corresponding suggestions are proposed by the authors.