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Influence of Urban Patterns on Flooding

Author(s): Martin Bruwier, Ahmed Mustafa, Daniel G. Aliaga, Sébastian Erpicum, Pierre Archambeau, Gen Nishida, Xiao Wei Zhang, Michel Pirotton, Jacques Teller, Benjamin Dewals

Linked Author(s): Martin Bruwier

Keywords: Urbanization, porosity model, urban inundation modeling, urban planning

Abstract: The goal of this paper is to identify the respective influence of different characteristics of urban patterns on urban flooding. A set of 2, 290 alternate urban patterns is generated randomly using an urban generator tool providing the geometry of buildings and their relative location to the ground, over a square area of 1 km�. Steady 2-D hydraulic computations are performed for these 2, 290 different urban patterns with identical hydraulic boundary conditions. The computational time is reduced by using ananisotropic porosity model. This model uses relatively coarse computational cells; but preserves information from the detailed topographic data through the use of porosity parameters. Based on the computed maps of water depths for the 2, 290 urban patterns, a sensitivity analysis based on a multiple linear regression is performed to outline the most influential urban characteristics


Year: 2017

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