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|Título:||Agroforestry systems design at parcel scale within Othe territory (FR): towards a spatial decision support system for catched water quality improvement|
|Resumo:||In order to provide potable water to the Parisian users, the Régie des Eaux de Paris (EDP) has set up since 2000 an upstream water protection strategy across territories housing its groundwater catchments. Despite the financial incentives granted for the (re)conversion to organic farming or to the grass covering of very vulnerable areas, water quality at the Vanne catchment is continuously and punctually exceeding potability thresholds. Therefore, in 2012, EDP has decided to conduct an experimental project for the development of agroforestry systems onto the Vanne catchments basin in order to limit nitrate, suspended matters and pesticides' transfers to surface and groundwater. For that, a previously-developed multicriteria and GIS-based methodology (PREVALTERA) has been adapted to provide a decision support system (DSS) enable to recommend for each parcel, when needed, efficient and matching agroforestry and/or agrotechnical alternatives. The methodology is facing both (i) the nature and the level of intrinsic vulnerability of the parcels to erosion, runoff, infiltration risks and again the potential benefit for the local ecological connectivity of its land improvement, (ii) the morphological and hydrological characteristics of the parcels and its close environment. It results by allocating different agroforestry and/or agrotechnical alternatives to individual parcels or to groups of parcels when local particularities (e.g. ponor) asked for a collective management plan. Results and recommendations obtained from the DSS are used as references by the territorial engineers together with the farmers to (1) localize hot spots and conduct in situ vulnerability diagnosis at parcel/farm scales to precise risks and assess agricultural pressures, (2) envisage the technical and economic feasibility of agrotechnical and/or agroforestry alternatives in their parcels. Later, as tested in other zones, the methodology makes possible the integration of farmers' preferences about agroecological alternatives and their estimated efficiency to decide of adapted, efficient but also accepted solutions.|
|Aparece nas colecções:||EURAF - Posters|
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|REP-EURAF-Post-46_David Grandgirard_territorial.pdf||697,09 kB||Adobe PDF||Ver/Abrir|
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