Map Viewing Service (WMS) of the dataset: Regulatory zoning of the flood risk prevention plan by overflow of the Marne de Châlons-en-Champagne River — Aval sector

For natural PPRs, the Environmental Code defines two categories of zones (L562-1): risk-exposed areas and areas that are not directly exposed to risks but where measures can be foreseen to avoid exacerbating the risk. Depending on the level of hazard and the issues, each area is subject to an enforceable regulation that sets out, in a clear and operational manner, the regulatory measures that apply to each of the restricted areas. The Regulation generally distinguishes five types of zones: 1. ‘Building prohibited areas’, referred to as ‘red areas’ or ‘pink areas’, depending on the level of hazard, in an area with little or no construction, or in an agricultural or natural area, then the general rule is the prohibition on construction; 2. “areas subject to requirements”, called “magentas zones” or “blue zones”, depending on the level of hazard in a built area, then the projects are subject to requirements adapted to the type of issue; 3. “white areas” not defined in the Regulation and for which the RPIP does not apply, as they are not subject to hazard. The identification of these homogeneous areas results in the development of a mapping of the regulatory zoning of the PPRi.针对天然PPRs（Natural PPRs），《环境法典》（Environmental Code）于条款L562-1中划定两类区域：风险暴露区域，以及虽未直接面临风险但需预先采取防控措施以避免风险加剧的区域。依据危害等级与具体问题类型，每类区域均受一项可强制执行的监管法规约束，该法规以清晰且可实操的方式，明确适用于各受限区域的监管措施。该法规通常将区域划分为五类：1. 禁止建设区（Building prohibited areas）：依据危害等级不同，又称为"红色区域"或"粉色区域"，在建设活动稀少或无建设的区域，或是农业与自然区域内，通用规则为严禁任何建设行为；2. 合规管控区（areas subject to requirements）：依据危害等级不同，又称为"品红色区域（magentas zones）"或"蓝色区域"，在已建成区域内，所有建设项目均需符合适配问题类型的管控要求；3. 白色区域（white areas）：本法规未对其作出明确定义，且因不受危害影响，故不适用RPIP相关规定。对上述同类区域的识别与划定，最终生成PPRi监管分区地图。