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Les changements environnementaux en cours impliquent d’adapter la gestion intégrée de l’eau aux enjeux du futur et de prendre en considération les particularités locales et leur évolution possible. La démarche de géoprospective permet d’envisager une gestion territorialisée de l’eau qui s’inscrive sur le temps long et intègre les points de vue de diverses catégories d’acteurs. Développée dans le projet de recherche RADHY-Buëch, sa mise en œuvre méthodologique a dû être révisée pour se plier aux contraintes de la crise sanitaire : sont exposées les étapes de recueil des visions des futurs de l’eau et de sa gestion dans le bassin du Buëch, la démarche d’élaboration des scénarios narratifs en construction à partir de ces représentations, l’outil de communication en cours de réalisation pour partager les connaissances acquises. Current environmental changes imply adapting integrated water resource management to the challenges of the future and taking into consideration local particularities and their possible evolution. The geoprospective approach makes it possible to consider a territorialized water management that takes place over a long period of time and integrates the points of view of various categories of stakeholders. Developed in the RADHY-Buëch research project, its methodological implementation had to be revised to meet the constraints of the health crisis. We show the stages of collecting visions of the future of water and its management in the Buëch basin as well as the process of elaborating narrative scenarios based on these representations, and finally the communication tool being developed to share the knowledge acquired.

International audience; In this chapter, the opportunity is given to three persons in charge of the planification and territorial and environmental prospective departments of major government bodies—ministries and the European Commission—to express their views. We wished to hear the opinion of these practitioners on the geoprospective approach. How is the spatial dimension introduced in the prospective studies carried out by their organizations? What are the preferred themes? On what types of spaces, regional levels, and at what scale are these prospective works conducted? How are they achieved, using what methodologies and operating modes? Backed by their experience, how do they consider the geoprospective approach, its interest, appropriation by the stakeholders concerned, and the prospects for its spread?

La prospective construit des scénarios d’évolution – pour la planification ou pour la protection de l’environnement – dans le but de susciter la discussion et la mise en perspective des visions d’avenir. Cette démarche orientée vers le futur rencontre un tournant spatial avec l’émergence de la géoprospective qui, en spatialisant les conjectures, permet de mettre en évidence des dynamiques géographiques et d’intégrer les enjeux spatiaux dans le débat. Une application participative de géoprospective aux pêches maritimes présente un double intérêt. Le premier est scientifique : il s’agit de contribuer aux corpus méthodologique et épistémologique de la géoprospective. En effet, la proposition de méthode permet de discuter la fonction des modèles, d’une part, et le rôle des chercheurs et des acteurs, d’autre part. Le second intérêt d’une géoprospective des pêches maritimes est opérationnel : l’amélioration de la connaissance collective sur les dynamiques et les enjeux sociospatiaux des pêches est de nature à faciliter le dialogue entre parties prenantes. À terme, ce dialogue peut être prolongé sous la forme d’une stratégie de gestion coconstruite., A prospective approach can be used to establish management and environmental protection options to stimulate discussion and bring different scenarios for the future into perspective. This future-oriented process incorporates spatial dimensions with the development of a geoprospective approach. Indeed, a geoprospective approach highlights geographical dynamics and integrates spatial perspectives into the debate. A participatory framework for analyzing the marine fisheries sector has two main advantages. The first is academic, in that it helps to establish a methodological and epistemological corpus based on geoprospective. The method proposal allows, on the one hand, to discuss the purpose of the models and, on the other, to explore the role of researchers and stakeholders. The second advantage of using geoprospective for the marine fisheries sector is operational: Improving collective knowledge about the social and geographical dynamics and issues surrounding marine fisheries contributes to dialogue between the stakeholders involved. Ultimately, geoprospective could become a shared management strategy., La prospección construye escenarios de evolución (para la planificación o para la protección del medio ambiente) para alentar discusiones y para poner en perspectiva visiones del porvenir. Este procedimiento, orientado hacia el futuro, encuentra un viraje espacial decisivo con la emergencia de la geoprospectiva, la que espacializando conjeturas permite evidenciar dinámicas geográficas e integrar las contingencias espaciales en el debate. Una aplicación participativa de la geoprospección a la pesca marítima presenta un interés doble. El primero es académico, se trata, pues, de contribuir al corpus metodológico y epistemológico de la geoprospección. Esta proposición metodológica permite discutir la función de los modelos y del rol de investigadores y actores. El segundo es operacional, busca mejorar el conocimiento colectivo de dinámicas y posibilidades socio-espaciales de la pesca, para facilitar el diálogo entre participantes. Al final, puede prolongarse como una estrategia de gestión co-construida.

International audience; Geoprospect TD is a set of computer codes constituting a so-called "showing workshop" for geoprospective studies. It has been developed at BRGM, from the geoprospective concepts of the past 10 years and belong to the line of tools that have been developed since 1984 (Castor, Herode, Castor PC, Geoprospect). The concept Geoprospect TD is improved in parallel with research, carried out in collaboration with the Laboratoire de Recherche en Informatique (Informatics Research Laboratory) of the University of Orsay on the application of Artificial Intelligence techniques to the field of geoprospective. The two lines of research are complementary and in time will enable the design of operational tools for simulating the future evolution of the geosphere. This paper, in the first instance, will present the key concepts of geoprospective, especially: - relationships between phenomena and time scale, - definition of geographic scales (global, regional and local), - topology of relationships between different-scale processes. Next, the conceptual bases on which Geoprospect TD is founded will be explained. These concern: - notions of landscapes and inheritance, - the coupling of phenomena; consideration, model limits, restrictions, - the "SAD" concept (Scenario-Actor-Director) in geoprospective research. The architecture of the system will then be briefly described so as to illustrate the instanciation of the above concepts. The paper will end by illustrating some of the results obtained and outlining the directions to be followed in future research.