References of "Mustafa, Ahmed Mohamed El Saeid"
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See detailAddressing the determinants of built-up expansion and densification processes at the regional scale
Mustafa, Ahmed Mohamed El Saeid ULiege; Van Rompaey, Anton; Cools, Mario ULiege et al

in Urban Studies (in press)

An in-depth understanding of the main factors behind built-up development is a key prerequisite for designing policies dedicated to a more efficient land use. Infill development policies are essential to ... [more ▼]

An in-depth understanding of the main factors behind built-up development is a key prerequisite for designing policies dedicated to a more efficient land use. Infill development policies are essential to curb sprawl and allow a progressive recycling of low-density areas inherited from the past. This paper examines the controlling factors of built-up expansion and densification processes in Wallonia (Belgium). Unlike the usual urban/built-up expansion studies, our approach considers various levels of built-up densities to distinguish between different types of developments, ranging from low-density extensions (or sprawl) to high-density infill development. Belgian cadastral data for 1990, 2000, and 2010 were used to generate four classes of built-up areas, namely, non-, low-, medium- and high-density areas. A number of socioeconomic, geographic, and political factors related to built-up development were operationalized following the literature. We then used a multinomial logistic regression model to analyze the effects of these factors on the transitions between different densities in the two decades between 1990 and 2010. The findings indicate that all the controlling factors show distinctive variations based on density. More specifically, the centrality of zoning policies in explaining expansion processes is highlighted. This is especially the case for high-density expansions. In contrast, physical and neighborhood factors play a larger role in infill development, especially for dense infill development. [less ▲]

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See detailInfluence of urban pattern on inundation flow in floodplains of lowland rivers
Bruwier, Martin ULiege; Mustafa, Ahmed Mohamed El Saeid ULiege; Aliaga, Daniel G. et al

in Science of the Total Environment (2018), 622–623

The objective of this paper is to investigate the respective influence of various urban pattern characteristics on inundation flow. A set of 2,000 synthetic urban patterns were generated using an urban ... [more ▼]

The objective of this paper is to investigate the respective influence of various urban pattern characteristics on inundation flow. A set of 2,000 synthetic urban patterns were generated using an urban procedural model providing locations and shapes of streets and buildings over a square domain of 1 x 1 km². Steady two-dimensional hydraulic computations were performed over the 2,000 urban patterns with identical hydraulic boundary conditions. To run such a large amount of simulations, the computational efficiency of the hydraulic model was improved by using an anisotropic porosity model. This model computes on relatively coarse computational cells, but preserves information from the detailed topographic data through porosity parameters. Relationships between urban characteristics and the computed inundation water depths have been based on multiple linear regressions. Finally, a simple mechanistic model based on two district-scale porosity parameters, combining several urban characteristics, is shown to capture satisfactorily the influence of urban characteristics on inundation water depths. The findings of this study give guidelines for more flood-resilient urban planning. [less ▲]

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See detailRésilience urbaine et risque d’inondation : apports du numérique et de l’expérimental
Dewals, Benjamin ULiege; Erpicum, Sébastien ULiege; Archambeau, Pierre ULiege et al

Scientific conference (2017, December 07)

L’urbanisation croissante et l’intensification des extrêmes hydrologiques accentuent l’importance de la gestion du risque d’inondation. Différents mesures en matière d’aménagement du territoire peuvent ... [more ▼]

L’urbanisation croissante et l’intensification des extrêmes hydrologiques accentuent l’importance de la gestion du risque d’inondation. Différents mesures en matière d’aménagement du territoire peuvent contribuer à maîtriser la vulnérabilité accrue des zones construites, mais leurs effets sont rarement quantifiés de manière objective. Nous montrerons des exemples d’analyse prospective de l’évolution du risque d’inondation pour différents scénarios d’urbanisation. Les nouvelles constructions affectent non seulement la vulnérabilité dans les plaines inondables, mais également les écoulements d’inondation. Une analyse systématique de l’impact hydrologique de choix en matière d’aménagement de la ville sera présentée. Des implications pratiques en matière de résilience des tissus urbains seront mises en évidence. Nous soulignerons également la complémentarité entre modélisation numérique et expérimentale sur cette thématique, ainsi que l’importance des incertitudes qui affectent de façon contrastée les différentes étapes de la modélisation et présentent une hétérogénéité spatiale à ne pas négliger. [less ▲]

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