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Un système d’information collaboratif en appui à la gouvernance des territoires d’action agro-environnementale à enjeu eau-pesticides

Abstract : Diffuse pollution generated by pesticides is a major problem both for aquatic ecosystems and human health. Despite years of efforts by policy-makers to limit their use and impact, the volumes of chemicals used by farmers have remained the same, and even increased in some areas, with no reduction in their presence in water. To address this situation, public policy is aiming to become more effective by using more localised, participative solutions. Local stakeholders in charge of action plans are looking for decision tools to help them assess the potential impact of agro-environmental measures, as well as applying them to the best areas. The aim of this thesis is to develop a tool suitable for this purpose, namely a multi-scale collaborative information system. The first main contribution made by this thesis is the creation of "SIGPA" (Information System for Action Plan Governance), which models assisted governance in pesticide action programs in various contexts. The second contribution is a method for modelling exchanges of information within a network of institutional stakeholders, based on a "Grenelle" action plan in the Charente river basin. The "Stakeholder" model represents exchanges between stakeholders, as well as the production of the information available within their networks. The third contribution is the "Scenario" model, which organises information in order to aid decision making based on possible developments in agriculture in the area studied. The fourth contribution is the design of a method by which to identify agricultural systems and practices and assess future developments in agriculture. The fifth and final contribution of this thesis is the creation of a spatial data warehouse and the use of a number of multidimensional cubes to represent stakeholders’ needs at various scales. The conceptual models presented provide an interactive way to discuss the most effective and least expensive ways of limiting pesticide pollution within the stakeholder network. A prototype of the spatial data warehouse has been implemented using field data collected within the BAC Coulonge action plan and the outputs discussed with stakeholders. By allowing for data and knowledge from stakeholder networks in multiple action plans to be pooled, the SIGPA approach is in keeping with the OSAGE model (Loireau et al, 2017), which provides the making process of an agro-environmental and multifunctional observatory.
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Françoise Vernier. Un système d’information collaboratif en appui à la gouvernance des territoires d’action agro-environnementale à enjeu eau-pesticides. Environnement et Société. Institut agronomique, vétérinaire et forestier de France, 2017. Français. ⟨NNT : 2017IAVF0022⟩. ⟨tel-02880324⟩

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