Probability-weighted hazard maps for comparing different flood risk management strategies: a case study

Giuliano Di Baldassarre (), Attilio Castellarin, Alberto Montanari and Armando Brath

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2009, vol. 50, issue 3, 479-496

Abstract: The study proposes an original methodology for producing probability-weighted hazard maps based on an ensemble of numerical simulations. These maps enable one to compare different strategies for flood risk management. The methodology was applied over a 270-km 2 flood-prone area close to the left levee system of a 28-km reach of the river Reno (Northern Central Italy). This reach is characterised by the presence of a weir that allows controlled flooding of a large flood-prone area during major events. The proposed probability-weighted hazard maps can be used to evaluate how a structural measure such as the mentioned weir alters the spatial variability of flood hazard in the study area. This article shows an application by constructing two different flood hazard maps: a first one which neglects the presence of the weir using a regular levee system instead, and a second one that reflects the actual geometry with the weir. Flood hazard maps were generated by combining the results of several inundation scenarios, simulated by coupling 1D- and 2D-hydrodynamic models. Copyright Springer Science+Business Media B.V. 2009

Keywords: Flood hazard; River Po plan; Hydrodynamic models; Flood inundation mapping (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1007/s11069-009-9355-6

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