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Dissimilarity Mesh Size Assessment for Two Dimensional Flood Routing Model

机译：二维洪水路由模型的异化网格尺寸评估

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2 Dimensional (2D) flow modeling is widely used for flood plain analysis and is considered to be a viable tool for evaluating flood propagation. The accuracy of open channel hydraulics and flood plain model is dependent on the refinement of model meshor grid to represent ground model topography using high-resolution Light Detection and Ranging (LiDAR). This paper examines the sensitivity of unstructured mesh size of two dimensional (2D) shallow water models. The accuracy of simulated overland floodpropagation was carried out using the Delaunay refinement method. The study was performed by connecting to the 2D hydrodynamic modeling platform InfoWorks Integrated Catchment Modelling (ICM) using two different methodologies. The first method is based on the generation Baseline of mesh model from the Digital Terrain Model (DTM), whereas the second method is based on the different mesh size. The results of flood propagation were analyzed using dissimilarity mesh resolutions in term of surge degree and run time. It can be concluded that the spatial resolution of the hydrodynamic model discretization influences model skill in simulating water surface elevation, flood depth, and agreement between inundation maps. However, further study is necessary to understand the entire performance of the two suggested methods.
机译：二维（2D）流模型广泛用于洪水平原分析，被认为是评估洪泛传播的可行工具。开放通道液压和洪水普通模型的准确性取决于模型网格网格的改进，以高分辨率光检测和测距（LIDAR）表示地面模型形貌。本文研究了二维（2D）浅水模型的非结构化网格尺寸的灵敏度。使用Delaunay改进方法进行了模拟陆洪坑的准确性。通过使用两种不同的方法连接到2D流体动力学建模平台InfoWorks集成集水模拟（ICM）来进行该研究。第一种方法基于来自数字地形模型（DTM）的网格模型的生成基线，而第二种方法基于不同的网格尺寸。在喘振程度和运行时间期间使用不同网格分辨率分析洪泛传播的结果。可以得出结论，流体动力学模型离散化的空间分辨率影响模拟水面高度，洪水深度和淹没地图之间的协议的模型技能。然而，进一步的研究是必要了解两种建议方法的整个性能。

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