滑坡涌浪的数值模拟

Numerical Simulations of Water Waves Due To Landslides

推导了用于模拟滑坡涌浪的DIF方程,并采用非规则网格有限体积法和显式MacCormack预测-校正数值方法求解该方程,建立了滑坡涌浪数值模型。利用新滩滑坡涌浪原型观测资料对数值模型进行了验证。模拟的涌浪首浪高度、涌浪爬坡及涌浪的沿程传播规律与原型观测资料吻合较好。研究了计算结果的可视化及进一步分析了滑坡涌浪灾害,此研究成果可用于滑坡涌浪灾害的预报和防治。

A 2-D depth-integrated flow （DIF） equation was derived for simulating waves generated by landslide, and a numerical model established with irregular body-fitted mesh finite volume method and explicit MacCormaek predictor-corrector method. To examine the performance of the numerical model, the landslide catastrophe in Xintan was simulated, and the results are in good agreement with the measured data, including the primary wave heights, the wave＇s climbing slopes along the bank and the laws of wave propagation toward upstream and downstream. Furthermore, the simulation results visualization was studied and the calamities caused by landslide generating waves were analyzed. The research results can be used to forecast and prevent landslide disaster.