Dam-break waves are a major concern for communities and infrastructures in flood-prone areas. The impact of dam-break waves against rigid obstacles after propagation on a mobile bed is lacking both in experimental datasets and in numerical investigations aimed at assessing the capabilities and limitations of available morphodynamic models. To fill these gaps, a novel data set from experiments of dam-break waves propagating over an erodible bottom and impacting over a vertical wall is presented and compared with numerical simulations performed by the Saint Venant–Exner model. First, the effects of bottom mobility are discussed by comparison with the corresponding fixed bed condition. Then, supplementary conditions are investigated for different initial water levels and reservoir lengths. The comparison with the results of the numerical simulation shows that the relatively simple model employed is able to reproduce the general features of the process and the peak impact force with reasonable accuracy.

中文翻译：

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Dam-Break 波在移动床上


溃坝波浪是洪水易发地区社区和基础设施的主要关注点。在实验数据集和旨在评估可用形态动力学模型的能力和局限性的数值研究中，都缺乏决坝波在移动床上传播后对刚性障碍物的影响。为了填补这些空白，提出了一个来自破坝波在可侵蚀底部传播并冲击垂直壁的实验的新数据集，并与 Saint Venant-Exner 模型进行的数值模拟进行了比较。首先，通过与相应的固定床条件进行比较来讨论底部迁移率的影响。然后，针对不同的初始水位和水库长度研究补充条件。与数值模拟结果的比较表明，所采用的相对简单的模型能够以合理的精度再现过程的一般特征和峰值冲击力。