Representing buildings and urban features in hydrodynamic flood models
Representing buildings and urban features in hydrodynamic flood models
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DOI：
10.1111/jfr3.12950
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发表时间：
2023-09
影响因子：
4.1
通讯作者：
Christos Iliadis;V. Glenis;C. Kilsby
中科院分区：
文献类型：
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作者：
Christos Iliadis;V. Glenis;C. Kilsby
城市和建成区的洪水风险是一个主要威胁，由于城市化和气候变化的增加，这一威胁可能会增加。城市规划、民防和保险的一个优先事项是在水动力模型中准确地表示建筑物和城市特征，以评估在不确定的未来对人、财产、资产和基础设施的洪水风险。由于缺乏详细和准确的技术，在模型中正确表示城市特征目前受到阻碍，现在有了更好的数据和计算资源，这已成为改进城市洪水建模的优先事项。本研究回顾了建筑物和城市特征的表示方法，并实施了广泛使用的“建筑物”近似，以及一个更现实和创新的“建筑洞”的方法，使用流体动力学模型CityCAT。城市中心的泰恩河畔纽卡斯尔，英国，被用作案例研究，允许独立验证的方法和直接，系统的性能比较。本文叙述了近似法的缺点，并就其可靠应用的限度和改进的范围给予了指导。
Flood risk in cities and built‐up areas is a major threat which is likely to grow due to increased urbanisation and climate change. It is a priority for urban planning, civil defence and insurance to accurately represent buildings and urban features in hydrodynamic models to assess flood risk to people, properties, assets and infrastructure in an uncertain future. The correct representation of urban features in models is currently blocked by the lack of detailed and accurate techniques and has become a priority for the improvement of urban flood modelling now that better data and computational resources are available. This study has reviewed the available approaches for the representation of buildings and urban features and implemented the widely used ‘stubby building’ approximation as well as a more realistic and innovative ‘building hole’ approach using the hydrodynamic model CityCAT. The city centre of Newcastle upon Tyne, UK, was used as a case study, allowing independent validation of the methods and direct, systematic comparison of performance. Shortcomings of the approximate method are described, and guidance given on limits to its reliable application and scope for improvement.