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Dynamiques d’adaptation des mobilités quotidiennes aux situations de crises hydrométéorologiques. – ADAPTFlood

Do people adapt their daily mobiity under heavy precipitation and flash flood warnings and why?

The study of flash flood coping practices should help to understand how different individualities and communities deal with their daily obligations when environmental conditions are rapidly declining.

Projects and daily constraints : What adaptation strategies to cope with flash flood threats?

The objective of the proposed study is to understand how individuals and households adapt their daily routine (travel patterns and schedule) to brutal environmental perturbations. This means:<br /><br />i) Identifying cognitive and situational factors as well as thresholds that help people to switch from normal daily activities to adapted crisis response, <br /><br />ii) Understanding the spatio-temporal interaction between individuals’ decision-making processes and the dynamic of both the phenomena and the social response,<br /><br />iii) Studying socio-economical and cultural profiles of people showing resilient and vulnerable practices.<br /><br />It should help to understand how different individualities and communities deal with their daily obligations when environmental conditions are rapidly declining.<br />

The project is based on 2 types of approaches, one focusing on the modelling and quantitative estimation of travel patterns exposed to road flooding in Gard department, the other more qualitative aims at observing mobility behaviours during flash flood events to better associated identify vulnerability factors.

The quantification of exposed travel patterns is supported by the development of the so-called TRAFFIX database over the Gard administrative area. Together with topographic analysis tools for hydrological and road network analyses, the relational database allows to analyse professional mobility patterns and hydrological characteristics at locations of potential road flooding.

Through spatial queries, simple statistical analysis allowed to investigate the relationship between daily travel patterns, individual’s characteristics and the spatial distribution of potential road, the related drainage area and the flood hazard severity index.

The results of the simulation of exposed mobilities in the Gard area allowed localising the most vulnerable road sections combining both a high level of hazard and an intense use by daily commuters. For instance the ten most dangerous sections are parts of routes used by more than 25200 daily users.

In terms of behaviours in time of flash flood warnings, our results show that the dynamic of the individual’s reactions doesn’t follow the pace of the local catchment response. In fact, the speed of human response, from information processes to people’s protection, is similar when people face fast rising flood (few minutes in the case of small catchments) and when they face more slowly rising floods reacting in few hours.

The three and half years of this project allowed to develop and test qualitative and quantitative methods to better observe individual mobility behaviors and related adaptation strategies used to cope with heavy precipitating events and flash flooding.

The collaborations initiated henceforth and the scientific and methodological achievements issued from this project were key to the elaboration of a new project called MobiClimex. The latter, recently funded by the ANR, will insure the continuity of the efforts on this research issue and its extension toward the larger space-time scales of physical and social processes. Therefore MobiClimex aims at studying the evolution of flash flood exposure due to residential choices in a context of climate change and its link with the dynamics of exposure related to daily mobility in the Gard area in southern France.

Seven scientific papers published in international peer reviewed journals and 16 presentations in international and national conferences describe the main outcomes of the ADAPTflood project. Outreach activities were also conducted in the form of conferences, interviews with newspapers and TV journalists.

Project coordinator

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

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Help of the ANR 0 euros
Beginning and duration of the scientific project: - 0 Months

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