Journal
WATER RESOURCES MANAGEMENT
Volume 32, Issue 8, Pages 2801-2815Publisher
SPRINGER
DOI: 10.1007/s11269-018-1959-8
Keywords
Computational hydraulics; Surrogate modelling; Pluvial flooding; Urban drainage model; Urban flooding
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Funding
- Spanish Regional Government of Galicia, Agentschap Innoveren en Ondernemen (Vlaio) [ED481B2014/156]
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Detailed full hydrodynamic 1D-2D dual drainage models are a well-established approach to simulate urban pluvial floods. However, despite modelling advances and increasing computational power, this approach remains unsuitable for many real time applications. We propose and test two computationally efficient surrogate models. The first approach links a detailed ID sewer model to a GIS-based overland flood network. For the second approach, we developed a conceptual sewer and flood model using data-driven and physically based structures, and coupled the model to pre-simulated flood maps. The city of Ghent (Belgium) is used as a test case. Both surrogate models can provide comparable results to the original model in terms of peak surface flood volumes and maximum flood extent and depth maps, with a significant reduction in computing time.
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