The Smoothed Particle Hydrodynamics code SPHERA (RSE SpA) is validated on a laboratory urban dam-break flood. Comparisons with a porous Shallow Water Equations - Finite Volume Method 2D model are also reported. SPHERA provides a performance comparable with the state-of-the-art code, with results closer to the measured values during the most risky flood stage. Some improvements of SPHERA predictions are achieved by a direct modelling of the mobile gate triggering the flood. SPHERA is also empowered with a substation-flooding damage model, which distinguishes the functional damage due to the substation out of service from the material damage to the substation components. SPHERA is finally applied to a full-scale catastrophic 3D dam-break flood, which interacts with a lower hydroelectric reservoir, covers four residential areas and two electrical substations, whose related damage is assessed. SPHERA is distributed on a GitHub public repository, included the input files of this study.

平滑粒子流体动力学代码 SPHERA (RSE SpA) 在实验室城市溃坝洪水中得到验证。还报告了与多孔浅水方程 - 有限体积法 2D 模型的比较。SPHERA 提供的性能可与最先进的代码相媲美，其结果更接近于最危险洪水阶段的测量值。SPHERA 预测的一些改进是通过对触发洪水的移动闸门进行直接建模来实现的。SPHERA 还支持变电站洪水损坏模型，该模型将变电站停运导致的功能损坏与变电站组件的物质损坏区分开来。SPHERA 最终应用于全面的灾难性 3D 溃坝洪水，该洪水与较低的水电水库相互作用，涵盖四个住宅区和两个变电站，相关损坏已进行评估。SPHERA 分布在 GitHub 公共存储库上，包括本研究的输入文件。