Fonctions multiples, contraintes multiples: Les défis du nouveau paradigme de gestion des zones alluviales suisses

Abstract

Floodplains are a complex environmental "object" which reveal the cultural, economic and ecological as well as safety stakes nowadays to be taken into account in river management. This paper is based on the results of a recent interdisciplinary research involving scientists in sociology, hydrology and soil ecology. Taking three case studies it examines the changes in the river management paradigm in Switzerland. This new paradigm pays growing attention to environmental protection issues and complementarily articulates safety and biodiversity conservation principles. Its application is nevertheless faced with various ecological, hydrological and socio-cultural constraints that limit public action. Floodplains represent a multidimensional ecosystem whose natural dynamic is crucial for maintaining the richness of its biodiversity. In this perspective, the new paradigm aims to reconcile ecological concerns with modern hydrological techniques and public acceptance. Complex social negotiations govern the implementation of the new revitalization measures. Public and private actors are the main pivots of these processes. New communication, collaboration and mediation procedures are enabling a process of social collective training. This process could facilitate in the future a deeper change in the values, the social representations of nature and risks, and the principles of value-based action. © nss dialogues, edp sciences 2007.