青藏高原泥石流的形成及运动过程研究

Study of formation and movement process of debris flow on Qinghai Tibet Plateau

传统的泥石流模拟模型对青藏高原泥石流的模拟与实际情况的吻合度较低,无法为预防与治理泥石流提供合理的数据。为此,构建泥石流形成运动模拟模型对青藏高原泥石流形成及运动过程进行模拟研究。根据质量守恒原则、侵蚀、降雨与摩擦影响因素,建立泥石流形成、运动模拟模型,采用有限差分数值方法对泥石流厚度与流速进行计算。通过对泥石流厚度与流速的计算,实现了对青藏高原泥石流形成、运动过程的模拟。通过实验对比结果可知,泥石流形成及运动模拟模型与实际情况的吻合度远远高于传统模拟模型,说明泥石流形成运动模拟模型具备较高的有效性。

The traditional debris flow simulation model is unable to provide reasonable data for debris flow prevention and control because of its low coincidence with the actual situation of Qinghai Tibet Plateau.Based on the mass conservation principle,erosion,rainfall and friction factors,a simulation model of debris flow is established.The thickness and velocity of debris flow are calculated by finite difference method,based on which the formation and movement process of debris flow on Qinghai-Tibet Plateau is simulated.The results out of experiments show this simulation model of debris flow is much more consistent with the actual situation than the traditional simulation model,indicating this simulation model has fairly high effectiveness.