Map Viewing Service (WMS) of the dataset: PPRN — Restricted area of the PSS of the municipality of LUNEVILLE (54329)

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.淹没地表平面图（Submersible Surface Planes, PSS）是首个针对联邦水道洪涝区域土地覆被的规范性测绘文件。该文件由1935年10月30日的立法政令（Decree-Law）及其1937年10月20日的实施政令制定。1995年2月2日的巴尼耶法（Barnier Law）赋予PSS风险预防计划（risk prevention plan, PPR）的法律地位，使其可对第三方强制执行。 PSS是一份设定地役权以规范土地使用的文件。根据《城市法典》（Urban Code）第R425-21条规定，它允许行政主管部门反对任何可能阻碍水体自由流通或保护洪涝滞洪区的行为与工程。 因此，在开展可能影响水体自然流通的工程（包括堤坝、堤防、堆场、围栏、种植工程、建筑工程等）前，必须进行申报。尽管PSS与PPR具有同等法律效力，但二者在技术层面存在差异：PPR是纳入区域脆弱性评估的风险规制区划方案，而PSS仅用于绘制洪涝风险分布图。 最后，PSS所测绘的是所谓“平均”洪水，其水位低于作为PPR制定依据的参照洪水——即已知最高水位对应的历史大洪水（PHEC）；若该历史大洪水低于百年一遇洪水，则采用百年一遇洪水作为参照标准。根据《环境法典》（Code de l’Environnement）第L562-6条规定，在相关市政区域通过PPR废止PSS之前，PSS应视同PPR执行。 对于天然PPR，《环境法典》（Code de l’Environnement）将其适用区域划分为两类（第L562-1条）：直接受风险影响的区域，以及虽未直接暴露于风险但可采取措施避免风险加剧的区域。根据风险等级，每一区域均需适用可强制执行的规制方案。 相关规制通常区分三类区域： 1. “禁止建设区”，又称“红色区域”：风险等级较高，通用规则为禁止建设； 2. “管制建设区”，又称“蓝色区域”：风险等级中等，建设项目需符合适配具体问题的相关要求； 3. 虽未直接暴露于风险，但任何建设、工程、开发或农业、林业、手工业、商业、工业类经营活动均可能加剧风险或引发新风险的区域，需遵守相关禁止性规定或合规要求（参见《环境法典》（Code de l’Environnement）第L562-1条）。 后一类区域仅适用于天然PPR。