The use of a micro-scale index to identify potential death risk areas due to coastal flood surges: lessons from Storm Xynthia on the French Atlantic coast

Créach, Axel; Pardo, Sophie; Guillotreau, Patrice; Mercier, Denis

doi:10.1007/s11069-015-1669-y

Cited by 37 publications

(45 citation statements)

References 31 publications

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“…During this tragic event, 47 people died including 41 by drowning (Breilh et al 2014;Chadenas et al 2014;Chaumillon et al 2017;Creach et al 2015;Kolen et al 2010;Vinet et al 2012). The storm also caused 2.5 billion euros of flood damage (Creach et al 2015;Lumbroso et al 2011). More recently, French overseas territories in the Antilles region experienced several cyclones and tropical depressions in 2017.…”

Section: Introductionmentioning

confidence: 99%

Individuals’ perceptions of areas exposed to coastal flooding in four French coastal municipalities: the contribution of sketch mapping

Coquet

Mercier²,

Fleury‐Bahi

2018

Geoenviron Disasters

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Background: This study analyzes individuals' perceptions of areas exposed to coastal flooding at a local level using sketch mapping methodology. In this way, 318 individuals were surveyed in four coastal municipalities in France (Barneville-Carteret, Saintes-Maries-de-lamer , Châtelaillon-Plage and Sainte-Anne). We assessed the disagreement between expert estimates and individuals' perceptions of areas exposed to coastal flooding using sketch mapping indicators. We also determined the relationships between individuals' living environments and the way they perceived the spatial extent of coastal flooding. Results: Respondents were likely to under-assess the exposure of areas that are actually exposed according to expert hazard maps. Perceived distance to coastal flooding areas appeared to be a predominant factor in assessing individuals' perceptions. Conclusions: Local preventive actions could take into account the individuals' tendency to underestimate the areas exposed to coastal flooding. Individual perception of the spatial extent of coastal flooding appeared to be more influenced by the perceived distance of the home to exposed areas than the objective distance. It is a result that raises the question about the individuals' understanding of hazard maps and regulatory maps. This may necessitate the improvement of the appropriation of these documents by the inhabitants by involving them more closely in the application and decision process that directly concerns.

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Section: Introductionmentioning

confidence: 99%

Individuals’ perceptions of areas exposed to coastal flooding in four French coastal municipalities: the contribution of sketch mapping

Coquet

Mercier²,

Fleury‐Bahi

2018

Geoenviron Disasters

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“…In order to tackle this problem, different methodologies have been developed by means of indicators (e.g. Gornitz 1990;McLaughlin et al 2002;Birkmann 2007;Wang et al 2011;Balica et al 2012;Creach et al 2015). Through the use of indicators, it is possible to integrate risk components with homogenous units and to integrate multiple-flood hazards into one flood risk assessment.…”

Section: Introductionmentioning

confidence: 99%

A multi-component flood risk assessment in the Maresme coast (NW Mediterranean)

2017

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Coastal regions are the areas most threatened by natural hazards, with floods being the most frequent and significant threat in terms of their induced impacts, and therefore, any management scheme requires their evaluation. In coastal areas, flooding is a hazard associated with various processes acting at different scales: coastal storms, flash floods, and sea level rise (SLR). In order to address the problem as a whole, this study presents a methodology to undertake a preliminary integrated risk assessment that determines the magnitude of the different flood processes (flash flood, marine storm, SLR) and their associated consequences, taking into account their temporal and spatial scales. The risk is quantified using specific indicators to assess the magnitude of the hazard (for each component) and the consequences in a common scale. This allows for a robust comparison of the spatial risk distribution along the coast in order to identify both the areas at greatest risk and the risk components that have the greatest impact. This methodology is applied on the Maresme coast (NW Mediterranean, Spain), which can be considered representative of developed areas of the Spanish Mediterranean coast. The results obtained characterise this coastline as an area of relatively low overall risk, although some hot spots have been identified with high-risk values, with flash flooding being the principal risk process.

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“…Indeed, as shown in reports published after Storm Xynthia (Vinet et al, (2011b;2012b), many other factors can explain the human toll of the storm, such as the age of people and their proximity to a dike, which is responsible for an aggravation of risk in the case of a breach. To go further in identifying the characteristics of buildings that are sources of danger or safety for people, we are building an index to evaluate the potential vulnerability of residential buildings for their occupants (Creach et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…The next step will be the application of the V.I.E. index, which is a more complete index, to assess the vulnerability of residential houses to their occupants (Creach et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Vulnerability to coastal flood hazard of residential buildings on Noirmoutier Island (France)

et al. 2015

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Storm Xynthia was responsible for the death of 41 people by drowning after the flooding by the sea of low-lying areas along French Atlantic coast in February 2010. This toll was partly explained by inadequacy of houses to flood hazard: 78% of the deaths occur in single-storey constructions.In this paper, we propose a map linking architectural typology of constructions with potential water depth in case of coastal flood event. The goal is to identify residential houses which present a high level of vulnerability for people to a potential coastal flood event. This work is presented on Noirmoutier Island which was few impacted by Storm Xynthia. However, it presents some common points with the most hit territories during the storm: 70% of the territory is under Xynthia level; 65% of the houses located in this lowlying area are single-storey constructions This map shows us different vulnerability between the four towns of the island.

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The use of a micro-scale index to identify potential death risk areas due to coastal flood surges: lessons from Storm Xynthia on the French Atlantic coast

Cited by 37 publications

References 31 publications

Individuals’ perceptions of areas exposed to coastal flooding in four French coastal municipalities: the contribution of sketch mapping

Individuals’ perceptions of areas exposed to coastal flooding in four French coastal municipalities: the contribution of sketch mapping

A multi-component flood risk assessment in the Maresme coast (NW Mediterranean)

Vulnerability to coastal flood hazard of residential buildings on Noirmoutier Island (France)

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