A Dynamic Cartographic Tool Suite for Coastal Flooding Vulnerability Assessment

In this article we propose a generic cartographic toolkit for vulnerability assessment to hazard based on multi-criteria analysis, enabling the most vulnerable areas to be accurately mapped. To achieve this, we designed an adaptive cartographic grid, with cell size being adapted to the geographical features. We also created a synthetic map relying on an innovative method based on the Choquet integral and the MACBETH method, in collaboration with the emergency services of the Pays de la Loire region (France). Finally our toolkit includes a dynamic decision-making tool for firefighters working in these sensible areas, which might help the emergency services to intervene with a spatial resolution of 25m/25m, including interactive maps to ease decision making. In this way, this methodology provides a global view and knowledge of the issues and vulnerability upstream of the crisis. To illustrate the use of our toolkit, we use it on the coastal flooding hazard in a Batz-sur-mer, a city in Pays de la Loire. This tool will be transferable and adaptable to other study areas and other risks following this work. • Development of a new indicator of vulnerability to coastal flooding by integrating the Choquet integral, which captures the interactions between risk factors, into the MACBETH (Measuring Attractiveness by a Categorical Based Evaluation Technique) method for structured multi-criteria decision analysis. • To apply geographical, sociopsychological and numerical methodologies in order to conduct a comprehensive territorial risk analysis, with outputs precisely mapped using advanced cartographic techniques for spatial visualization and interpretation. • To transform the vulnerability indicator into a dynamic decision-making tool designed to support emergency services in anticipating, evaluating, and managing coastal flooding events in real time.