As research in the field of analysing urban flood rainfall events progresses, it is evident that dual-drainage models remain the standard for producing the most realistic results of flood extension and water depth. However, the development of these sophisticated models is contingent upon the availability of comprehensive data sets that can be used to simulate runoff behaviour on the surface and account for hydraulic processes within the sewer network. The aim of this study is to demonstrate that comparable outcomes can be achieved through the modification of 2D surface models, which require less data and are more straightforward to set up. In order to test the efficacy of different methodologies for the enhancement of 2D models, two distinct approaches were implemented in two study areas with disparate rainfall loads in a city in south-west Germany. The results were then compared with those of a 1D/2D model. The findings of this study demonstrate that the methodologies tested are effective in improving the accuracy of 2D models, and that they are capable of producing results that closely align with those of dual-drainage models.

中文翻译：

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增强的 2D 模型作为城市洪水模拟双排水系统的替代方案


随着城市洪水降雨事件分析领域的研究进展，很明显，双排水模型仍然是产生最真实的洪水扩展和水深结果的标准。然而，这些复杂模型的开发取决于可用于模拟地表径流行为并解释下水道网络内的水力过程的综合数据集的可用性。本研究的目的是证明可以通过修改 2D 表面模型来实现可比的结果，这需要更少的数据并且更易于设置。为了测试不同方法对增强 2D 模型的有效性，在德国西南部一个城市具有不同降雨负荷的两个研究区域实施了两种不同的方法。然后将结果与 1D/2D 模型的结果进行比较。本研究的结果表明，所测试的方法可有效提高 2D 模型的准确性，并且它们能够产生与双排水模型密切相关的结果。