Dataset Direct Download Service (WFS): PPRN — Regulated area of the PSS of the municipality of ROVILLE-DEVANT-BAYON (54465)

Submersible Surface Planes (PSS) are the first mapping documents regulating land cover in flooding areas for federal watercourses. They were created by the Decree-Law of 30 October 1935 and its implementing decree of 20 October 1937. The Barnier Law of 2 February 1995 gives PSS a risk prevention plan (PPR) status, making them enforceable against third parties. The PSS is a document that establishes a utility easement affecting land use. It allows the administration to oppose any action or work likely to impede the free flow of water or the conservation of flood fields (Article R425-21 of the Urban Code). The filing of a declaration before carrying out works likely to affect the natural flow of water (digues, embankments, depots, fences, plantations, constructions) is therefore necessary. Although having the same legal value, PSS and PPR are technically different. SSPs “merely” map a flood hazard in contrast to PPRs that represent a risk taking into account the vulnerability of the territories (regulatory zoning plan). Finally, the PSS mapped a so-called “average” flood less than the reference flood used as the basis for the development of PPRs (the highest known flood corresponding to the highest known waters (PHEC) and, in the event that it was lower than a centennial flood, the latter). Pursuant to Article L562-6 of the Code de l’Environnement, the PSS are to be PPR pending their repeal by a PPR on the municipalities concerned. 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 hazard level, each area is subject to an enforceable settlement. The regulations generally distinguish three types of zones: 1- ‘Building prohibited areas’, known as ‘red areas’, where the hazard level is high and the general rule is the prohibition on construction; 2- ‘prescribed areas’, known as ‘blue zones’, where the hazard level is average and the projects are subject to requirements adapted to the type of issue; 3- areas not directly exposed to risks but where constructions, works, developments or farms, agricultural, forestry, craft, commercial or industrial could aggravate risks or cause new ones, subject to prohibitions or requirements (cf. Article L562-1 of the Environmental Code). The latter category applies only to natural RPPs.淹没地表图（Submersible Surface Planes，PSS）是首个针对联邦水道洪泛区土地覆盖制定的监管绘图文件。该文件由1935年10月30日的法令及1937年10月20日的实施细则制定。 1995年2月2日的《巴尼耶法》赋予PSS风险预防计划（Risk Prevention Plan，PPR）的法定地位，使其可对第三方强制执行。PSS是一种设定公用役权以规范土地使用的文件，它允许行政主管部门反对任何可能阻碍水流自由流通或保护洪泛区的行为或工程（《城市法典（Urban Code）》第R425-21条）。因此，在开展可能影响自然水流的工程（如堤坝、路堤、仓库、围栏、种植园、建筑等）前，必须进行申报。 尽管二者具有同等法律效力，但PSS与PPR在技术层面存在显著差异。PPR会结合领土脆弱性制定风险方案，形成监管分区规划；而PSS“仅”用于绘制洪水灾害范围。最后，PSS所划定的所谓“平均”洪水水位，低于作为PPR制定基准的参考洪水水位——参考洪水水位指已知最高水位（PHEC），若该水位低于百年一遇洪水水位，则以百年一遇洪水水位为准。 根据《环境法典（Code de l’Environnement）》第L562-6条，在相关市镇通过PPR废止PSS之前，PSS均具有PPR的效力。 对于天然PPR，《环境法典》将区划分为两类（L562-1）：风险暴露区，以及未直接暴露于风险但可采取措施避免风险加剧的区域。 根据灾害等级，每类区域均需遵守可强制执行的管控规则。法规通常区分三类区域： 1. “禁止建设区”（又称“红色区域”）：灾害等级较高，原则上禁止建设； 2. “限制建设区”（又称“蓝色区域”）：灾害等级中等，工程需符合适配相关问题类型的要求； 3. 未直接暴露于风险，但建设、工程、开发或农业、林业、手工业、商业、工业活动可能加剧风险或引发新风险的区域，需遵守相关禁令或管控要求（参见《环境法典》第L562-1条）。该第三类区域仅适用于天然PPR。