Protection against muddy floods: Perception of one protection system (fascines) for local actors in Alsace (France) - Ecole Nationale du Génie de l'Eau et de l'Environnement de Strasbourg Accéder directement au contenu
Communication Dans Un Congrès Année : 2012

Protection against muddy floods: Perception of one protection system (fascines) for local actors in Alsace (France)

Résumé

For several years, an increase of muddy floods frequency (and associated damages) is noticed in the Alsacian region (NE of France). In 2008, the regional authority ("Conseil Général") with the collaboration of the Chamber of Agriculture decided to set up, directly on farmlands, micro-structures called “fascines” (faggots of brushwood). These little protection systems allow to decrease the muddy floods velocity and to capture the sediments that are transported decreasing by this way the vulnerabilty in risk prone areas located downstream the catchment. These protections present two advantages: they are very easy and cheap to set up. In the region, we can list 400 fascines, step up in 21 municipalities exposed to the muddy floods risk. This study focuses on farmers' perception of these fascines in order to understand their potential acceptability of this kind of mitigation measure and to highly the main issues linked to the democratisation of these protective measures in the whole risk prone areas. The methodology used is a questionnaires (N=37) held among farmers in 5 municipalities exposed to muddy floods risk. The main results show that the fascines are perceived as a restrictive tool: the most of the farmers mentioned that their maintenance is more important than for other mitigation measures such as hedges, non inversion tillages, grass strips,.... also proposed in the questionnaire. Moreover the "real" efficiency of the fascines against the muddy floods propagation is questioned by the farmers as well as their integration in the landscape. Among others, these results allow to highly the main restraints in the development of such mitigation measures and have been directly used by the Chamber of Agriculture in order to improve their information campaigns among the farmers to improve the use of the fascines in risk mitigation polices and risk prone areas planning.
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Dates et versions

hal-00801828 , version 1 (18-03-2013)

Identifiants

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C. Heitz, G. Flinois, S Glatron. Protection against muddy floods: Perception of one protection system (fascines) for local actors in Alsace (France). International Disaster Risk Conference, Aug 2012, Davos, Switzerland. 4 p. ⟨hal-00801828⟩
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