Regulatory zoning of the Marne River Flood Risk Prevention Plan — Épernay Sector — CCGVM

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 zone”, 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”, referred to as “magenta zone”, “medium blue zone” or “light blue zone”, depending on the level of hazard in an urbanised 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. The hazard, the stakes, which made it possible to construct this regulatory Zonage, as well as the reference ratings are located under the no. gaspar 51DDT20170001 Spatial resolution: 1/10 000 Genealogy: The boundaries of a restricted area are shown on the graphical documents of the RPP. Regulatory limits are generally set on natural phenomena, which do not follow cadastral or administrative boundaries. A RPP determines the boundaries of the different restricted areas based on the calculated right-of-way of the site’s hazardous events. Some RPPs may sometimes contain regulations associated with linear or point configurations (cavitates, runoff axis, etc.). Linear and point graphic primitives are to be used in these cases respectively.针对自然防护地带（PPR），《环境法典》（Environmental Code）划定了两类区域（条款编号L562-1）：风险暴露区域，以及虽未直接面临风险但需采取防控措施以避免风险加剧的区域。 依据危害等级与相关问题类型，每类区域均需遵循可强制执行的监管规范，该规范以清晰且可落地的方式明确了适用于各受限区域的监管措施。该监管规范通常将区域划分为五类： 1. **禁止建设区**（又称"红色区域"）：针对建设活动极少或无建设的区域，或农业、自然区域，依据其危害等级，通用规则为禁止任何建设行为； 2. **受约束区域**（又称"品红色区域""中蓝色区域"或"浅蓝色区域"）：针对城市化区域，依据其危害等级，所有建设项目均需遵循适配问题类型的约束性要求； 3. **白色区域**：本监管规范未对其作出界定，且由于不存在风险隐患，不适用重大风险防护规划（RPIP）的相关要求。 对上述均质区域的识别工作，最终形成了重大风险防护地带i（PPRi）的监管分区制图成果。 支撑本次监管分区划定的危害等级、风险利害程度以及参考评级标准，均可通过档案编号gaspar 51DDT20170001查询获取。 空间分辨率：1/10000 数据溯源：受限区域的边界在重大风险防护地带（RPP）的图形文档中予以标注。监管边界通常依据自然现象划定，并不遵循地籍或行政边界。重大风险防护地带（RPP）会基于场地危险事件经计算得出的安全防护范围，划定各类受限区域的边界。部分重大风险防护地带（RPP）可能包含与线性或点状配置（如空洞、径流轴线等）相关的监管要求，此类场景下需分别使用线性和点状图形基元进行标注。