Dataset Direct Download Service (WFS): Classes de l’aléa du PPRMT de Saint Viance 2009 — Corrèze

N_ZONE_ALEA_PPRN_20070006_S_019
Classes de l’aléa du PPRMT de Saint Viance 2009 — Corrèze

Plan for the Prevention of Natural Risks of Field Movements (PPRMT) in the northwest sector of the commune of Saint-Viance (in Corrèze)

Natural PPRs are established in accordance with the provisions of Article L. 562-1 of the Environmental Code. The regulatory mapping translates into a geographical demarcation of the territory concerned by the risk. This delimitation defines areas in which specific regulations apply. These by-laws are valid as easement. As such, depending on the intensity of the hazard, they regulate the use of the land or its use by demarcating areas where new constructions and installations are prohibited in order not to aggravate the risk, and areas where constructions and installations may be authorised subject to compliance with requirements.

The PPRMT on the northwest sector of the commune of Saint-Viance was approved on 3 November 2009. After several disturbances related to soil instability, the hazards were analysed according to the geological formations in the presence, hydrogeology, and morphology. Depending on the intensity of the hazard and the present challenges, three areas have been defined: a medium hazard zone, classified as a blue zone (built subject to compliance); a strong hazard area with stakes, classified as an urbanable orange zone only for individual housing and the open-air hotel industry subject to compliance with requirements and a strong hazard area with no stakes classified as an inconstructible area.

N_ZONE_ALEA_PPRN_20070006_S_019
圣维昂斯市2009年场地移动型自然风险防治规划（PPRMT，Plan for the Prevention of Natural Risks of Field Movements）风险分区——科雷兹省

本数据集对应科雷兹省圣维昂斯市镇西北部区域的场地移动型自然风险防治规划（PPRMT）。

自然风险防治规划（PPR）的制定需符合法国《环境法典》第L.562-1条之规定。法定风险制图实质是对受风险影响的地域范围开展地理划界，该划界明确了需适用专项规制的区域。此类附属法规以地役权形式生效，据此，根据风险强度差异，该类法规通过划界实施土地使用管控：一类为禁止新建建筑与设施的区域，以避免加剧风险；另一类为经合规审查后方可批准建设与设施安装的区域。

圣维昂斯市镇西北部区域的PPRMT于2009年11月3日获批。在经历多起土壤失稳引发的扰动事件后，本次风险分析结合区域现存地质构造、水文地质条件与地貌特征展开。结合风险强度与当前管控需求，本次规划划定三类区域：中等风险区，划为蓝区（仅可经合规审查后开展建设）；带有管控约束的高风险区，划为可开发橙区，仅允许建设独栋住宅与户外酒店业且需通过合规审查；无管控豁免的高风险区，划为禁建区域。