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Adapting viticulture to climate change: a participatory scenario design within a Mediterranean catchment

Naulleau Audrey. 2022. Adapting viticulture to climate change: a participatory scenario design within a Mediterranean catchment. In : Digital book of proceedings: 14th European IFSA symposium. Farming systems facing climate change and resource challenges. IFSA. Evora : IFSA, 291-303. European IFSA Symposium (IFSA 2022). 14, Evora, Portugal, 8 Avril 2022/14 Avril 2022.

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Résumé : In a context of climate change, water management is considered a determinant factor for the agricultural sector, including viticulture. Grape is highly climate-sensitive, regarding both quantitative and qualitative production, making consequently climate change challenging. In France, vineyards are usually rainfed, although irrigation tends to develop, particularly in the Southern regions. However, many concerns remain: sharing the resources between uses and users, water shortage, salinization, etc. Various growing practices contribute to the grapevine adaptation to water shortage under rainfed situations: plant material, planting density, training system, soil management, etc. Adaptation strategies may combine these adaptation levers, through considering current and future water resource, cropping and farming systems. This paper lays out a methodology aiming at exploring the floowing hypothesis : " the combination of growing practices at the plot and farm level, and their spatial distribution in a catchment could give significant leeway to adapt a perennial crop such as grapevine to climate change ". In a typical Mediterranean catchment (Rieutort, 45 km²), a group of stakeholders, involved in viticulture and water management, is mobilized to design and evaluate adaptation strategies, built as alternative spatial distributions of cropping and farming systems. A chain of models is used for producing indicators, measuring the impact of the different adaptation strategies under future climate. The originality of this multidisciplinary approach lies in the coupling of (1) a participatory approach (data collection, scenario design, integrated assessment), and (2) modeling tools allowing multi- scale quantitative assessment (plot, farm, and catchment). The methodological framework is illustrated by the results of the first step: the initial local diagnosis, and a shared conceptual scheme of the studied systems. The two next steps, scenario design and quantitative modeling, will be based on these preliminary results.

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