北京山区泥石流运动数值模拟及危险区制图

北京山区泥石流经常给当地造成财产损失与人员伤亡,因此研究该地区的泥石流运动规律并进行危险区制图,具有重要实际意义.该文通过简化平面二维非恒定流的基本方程,采用LagrangeEuler型的数值计算模型(流团模型),对门头沟区几条典型泥石流沟道的泥石流运动堆积过程进行了数值模拟,并在此基础上利用绘图软件Graphtool3.3对危险区进行了绘制.经过与实地调查方法的结果对比表明,两者符合较好,验证了该文数值方法的可靠性.

Debris Flow Simulation and Hazard Zone Mapping in Mountainous Regions of Beijing

Debris flowsoften cause destruction of property and loss of life in mountainous regions of Beijing. Itis of practical significance to study the mechanisms of debris flow and map the hazardareas. By simplifying basic equations of unsteady flow in two horizontal dimensions andemploying Lagrange-Euler computing methods (Particle Model), debris flow motion anddeposition processes in several typical debris gullies in Mentougou District are simulatedand hazard areas are drawn through software Graph-tool 3.3. The simulations are in goodagreement with field investigations, which demonstrates the reliability of the numericalmethod presented herein.