Landslide-induced impulse waves in a river-valley reservoir region have become a serious threat to life and property intactness. Compared with previous studies focusing on landslides in open-water regions, this article systematically carried out numerical investigations on the hydrodynamic characteristics of landslide-induced impulse waves in narrow river-valley reservoirs by applying software package FLOW3D. To verify the computational reliability of FLOW3D, necessary experimental work was conducted. The predicted temporal evolutions of water elevation at selected wave gauges are in good agreement with that recorded during the corresponding experiment. The effects of some prominent factors, such as the drop height of the slide, still-water depth, slide volume, and slide slope, on the propagation and magnitude of landslide-induced impulse waves are investigated in detail by systematically analyzing both simulation and experimental results. Based on simulation results, we proposed empirical formulas for predicting the landslide-induced impulse waves by performing dimensionless analysis and applying nonlinear regression methods. Then, the proposed empirical formulas were applied to predict the impulse waves induced by four landslide accidents. It is believed that the findings drawn from this article could greatly enhance our understanding on the hydrodynamic characteristics of landslide-induced impulse waves in narrow river-valley reservoir regions, and the proposed empirical formulas can be used as quick technical support for the safe navigation of such rivers.

中文翻译：

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窄河谷水库滑坡诱发冲击波水动力特性数值研究

河谷库区滑坡诱发的冲击波已严重威胁生命财产安全。与以往针对开阔水域滑坡的研究相比，本文应用FLOW3D软件包系统地对狭窄河谷水库滑坡诱发脉冲波的水动力特征进行了数值研究。为了验证 FLOW3D 的计算可靠性，进行了必要的实验工作。在选定的波浪仪上预测的水位高度的时间演变与相应实验期间记录的非常一致。滑道落差、静水深度、滑道容积、滑道坡度等突出因素的影响，通过系统地分析模拟和实验结果，对滑坡诱发的脉冲波的传播和幅度进行了详细研究。根据模拟结果，我们通过无量纲分析和应用非线性回归方法，提出了预测滑坡诱发脉冲波的经验公式。然后，将所提出的经验公式应用于预测由四次滑坡事故引起的冲击波。相信本文的研究结果可以大大增进我们对狭窄河谷库区滑坡诱发脉冲波的水动力特性的认识，所提出的经验公式可作为快速安全航行的技术支持。这样的河流。