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Communication Dans Un Congrès Année : 2016

Coastal flood risk assessments: spatial and temporal biases

Résumé

The vulnerability of coastal populations increases because of sea level rise as a result of climate change. This trend is also due to a phenomenon of risk production related to urbanization in flooding areas. This research analyzes vulnerability of French coastal area inhabitants to coastal flooding from their personal risk assessments. More precisely, this study focuses on spatial optimism bias (“things are better here than there”) and temporal pessimism bias (“things will get worse in the future”) in the assessment of coastal flooding. This study is based on an interdisciplinary methodology (combining geography and environmental psychology approaches) and it uses several tools. First, personal risk assessments on current and expected (in 25 and 100 years) coastal flooding phenomena from 342 inhabitants in four coastal cities in France (Barneville-Carteret in Manche, Saintes- Maries-de-la-Mer in Bouches-du-Rhône, Châtelaillon-Plage in Charente-Maritime, Sainte- Anne in Guadeloupe) were investigated at four spatial levels of assessment (home, town, country, the world) using a questionnaire survey. Second, respondents also produced personal mapping of coastal flooding areas at their town level. Those participatory maps were compared to official mapping of flooding areas. Third, spatial data were collected and analyzed using GIS software (where is the respondent’s house located?, is the respondent’s house located inside a flooding area according to official mapping?, are there any coastal protections near the respondent’s house?). In addition to variables such as personal risk experience or personal risk knowledge, we hypothesize that the spatial data have an incidence on personal assessments of coastal flood risk and help to understand the spatial and temporal biases in those personal assessments.
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Dates et versions

hal-01481386 , version 1 (02-03-2017)

Identifiants

  • HAL Id : hal-01481386 , version 1

Citer

Marie Coquet, Denis Mercier, Ghozlane Fleury-Bahi. Coastal flood risk assessments: spatial and temporal biases. LITTORAL 2016 THE CHANGING LITTORAL. ANTICIPATION AND ADAPTATION TO CLIMATE CHANGE, Oct 2016, Biarritz, France. pp.47. ⟨hal-01481386⟩
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