Protection zone for a catchment area (AAC) intended for the AEP in Seine-et-Marne

In response to the requirements of the Water Framework Directive, the Water and Aquatic Environments Act of 30/12/06 strengthened the control of diffuse pollution of agricultural origin by creating protection zones for catchment feeding areas. The implementation of this new resource protection system leads to the delineation of catchment foraging areas (AAFCs), sometimes also referred to as catchment feeding basins (BACs) — layer #1011 — which include AAFC protection zones.The protection zone is defined by crossing the intrinsic vulnerability mapping zoning with agricultural pressure zoning.In the case of surface water abstractions, the definition of a protection zone within the watershed upstream of the intakes is based on the identification of flows (running, drainage, flow ditches, exchanges between alluvial aquifers and rivers) and identification, through a territorial diagnosis of agricultural pressures and areas likely to play the most important role in the degradation of the water resource.为响应《水框架指令》（Water Framework Directive）的相关要求，2006年12月30日出台的《水与水生环境法》（Water and Aquatic Environments Act）通过为集水区补给区设立防护带，强化了对农业源面源污染的管控。该新型水资源保护体系的落地实施，催生了集水区觅食区（AAFCs，catchment foraging areas）的划定工作，此类区域有时也被称为集水区补给盆地（BACs，catchment feeding basins）——即第1011图层——其范围包含AAFC防护带。该防护带的划定需将本征脆弱性制图分区与农业压力分区进行叠加分析。针对地表水取水工程，取水口上游流域内防护带的划定，需先识别各类径流（包括地表径流、排水沟渠径流、输水渠道水流以及冲积含水层与河流间的水量交换），再通过农业压力的区域诊断，明确对水资源退化起到关键影响的区域。