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Geosciences 2018, 8(2), 77; https://doi.org/10.3390/geosciences8020077

Simulating the Influence of Buildings on Flood Inundation in Urban Areas

1
Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy
2
Modellistica e Monitoraggio Idrologico S.r.l, Via Ariberto 1, 20123 Milano, Italy
*
Author to whom correspondence should be addressed.
Received: 19 January 2018 / Revised: 19 February 2018 / Accepted: 19 February 2018 / Published: 24 February 2018
(This article belongs to the Special Issue Hydrological Hazard: Analysis and Prevention)
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Abstract

Two-dimensional hydraulic modeling is fundamental to simulate flood events in urban area. Key factors to reach optimal results are detailed information about domain geometry and utility of hydrodynamic models to integrate the full or simplified Saint Venant equations in complex geometry. However, in some cases, detailed topographic datasets that represent the domain geometry are not available, so approximations—such as diffusive wave equation—is introduced whilst representing urban area with an adjusted roughness coefficient. In the present paper, different methods to represent buildings and approximation of the Saint Venant equations are tested by performing experiments on a scale physical model of urban district in laboratory. Simplified methods are tested for simulation of a real flood event which occurred in 2013 in the city of Olbia, Italy. Results show that accuracy of simulating flow depth with a detailed geometry is comparable to the one achieved with an adjusted roughness coefficient. View Full-Text
Keywords: urban topography; flood modeling; Saint Venant equations; laboratory experiment; buildings; roughness coefficient urban topography; flood modeling; Saint Venant equations; laboratory experiment; buildings; roughness coefficient
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Beretta, R.; Ravazzani, G.; Maiorano, C.; Mancini, M. Simulating the Influence of Buildings on Flood Inundation in Urban Areas. Geosciences 2018, 8, 77.

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