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Probability-weighted hazard maps for comparing different flood risk management strategies: a case study

机译：用于比较不同洪水风险管理策略的概率加权危害图：一个案例研究

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The study proposes an original methodology for producing probability-weighted hazard maps based on an ensemble of numerical simulations. These maps enable one to compare different strategies for flood risk management. The methodology was applied overa 270-km~2 flood-prone area close to the left levee system of a 28-km reach of the river Reno (Northern Central Italy). This reach is characterised by the presence of a weir that allows controlled flooding of a large flood-prone area during major events.The proposed probability-weighted hazard maps can be used to evaluate how a structural measure such as the mentioned weir alters the spatial variability of flood hazard in the study area. This article shows an application by constructing two different flood hazard maps: a first one which neglects the presence of the weir using a regular levee system instead, and a second one that reflects the actual geometry with the weir. Flood hazard maps were generated by combining the results of several inundationscenarios, simulated by coupling ID- and 2D-hydrodynamic models.
机译：这项研究提出了一种基于数值模拟的整体方法来制作概率加权危险图。这些地图使人们能够比较洪水风险管理的不同策略。该方法已在雷诺河（义大利北部中部地区）28公里的左堤防系统附近的270 km〜2洪水多发地区应用。该范围的特征是堰板的存在，可以在重大事件期间控制大洪水多发区的洪水。拟议的概率加权危险图可用于评估结构措施（如上述堰板）如何改变空间变异性研究区域的洪灾危害。本文通过构建两个不同的洪水灾害图来展示一种应用程序：第一个使用常规的堤坝系统来忽略堰的存在，第二个使用堰来反映实际的几​​何形状。洪水灾害图是通过结合几种洪水情景的结果而生成的，这些情景是通过将ID模型和二维流体动力学模型耦合来模拟的。

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