Dataset Direct Download Service (WFS): Hazard Areas of the Noailhac Field Movement Risk Prevention Plan (PPRMT) in Corrèze

N_ZONE_ALEA_PPRN_20070002_S_019

Gaspar number 19DDT20070002

The Risk Prevention Plans (PPR) were established by the Act of 2 February 1995 on strengthening the protection of the environment. They are the key instrument of the State in the field of risk prevention. Their objective is to monitor development in areas exposed to a major risk.
The PPRs are approved by the prefects and generally carried out by the departmental directorates of the territories (DDT). These plans regulate land use or land use through building prohibitions or requirements on existing or future buildings (constructive provisions, vulnerability reduction work, restrictions on agricultural use or practices, etc.).
These plans may be under development (prescribed), implemented in advance or approved.
The RPP file contains a presentation note, a regulatory zoning plan and a regulation. Other graphic documents that are useful for understanding the approach (e.g. hazards, issues, etc.) can be attached. Each PPR is identified by a polygon that corresponds to the set of municipalities
the scope of the prescription when it is in the prescribed state; and the envelope of restricted areas when it is in the approved state.

Area exposed to one or more hazards represented on the hazard map used for risk analysis of the RPP.
The hazard map is the result of the study of hazards, the objective of which is to assess the intensity of each hazard at any point in the study area. The evaluation method is specific to each hazard type. It leads to the delimitation of a set of areas on the study perimeter constituting a zoning graduated according to the level of the hazard. The allocation of a hazard level at a given point in the territory takes into account the probability of occurrence of the dangerous phenomenon and its degree of intensity.
For multi-random PPRNs, each zone is usually identified on the hazard map by a code for each hazard to which it is exposed.

All hazard areas shown on the hazard map are included. Areas protected by protective structures must be represented (possibly in a specific way) as they are always considered subject to hazard (case of breakage or inadequacy of the structure).
Hazard zones can be described as developed data to the extent that they result from a synthesis using multiple sources of calculated, modelled or observed hazard data. These source data are not concerned by this class of objects but by another standard dealing with the knowledge of hazards.
Some areas within the study area are considered “no or insignificant hazard zones”. These are the areas where the hazard has been studied and is nil. These areas are not included in the object class and do not have to be represented as hazard zones. However, in the case of natural RPPs, regulatory zoning may classify certain areas not exposed to hazard as prescribing areas (see definition of the PPR class).

N_ZONE_ALEA_PPRN_20070002_S_019
Gaspar编号：19DDT20070002

1995年2月2日颁布的《加强环境保护法案》确立了风险预防计划（Risk Prevention Plans，PPR），其作为国家在风险预防领域的核心工具，旨在对面临重大风险区域的开发活动进行管控。
风险预防计划由省长批准，通常由领地部门主管局（Departmental Directorates of the Territories，DDT）负责推进。该计划通过对现有或新建建筑颁布建设禁令、提出建设要求（如建设规范、降低脆弱性工程、限制农业使用或作业方式等）来规范土地用途或土地开发活动。
此类计划可处于制定中（已下达指令）、预先实施或已获批三种状态。
风险预防计划文件包含一份说明文档、一张管控分区规划以及一份管控条例。此外可附加有助于理解该方案的其他可视化文档（如风险、相关问题等相关材料）。每份风险预防计划由一个多边形标识：当计划处于指令状态时，该多边形对应指令覆盖的全部市镇范围；当计划获批时，则对应受限区域的包络范围。

本类对象指面临RPP风险分析所用风险地图（hazard map）中标注的一种或多种风险的区域。
风险地图是风险研究的成果，该研究的目标是评估研究区域内任意点位的各类风险强度。评估方法因风险类型而异，最终会在研究范围内划定一系列区域，形成按风险等级分级的分区。针对辖区内某一特定点位的风险等级赋值，需综合考量该危险现象的发生概率及其强度等级。
针对多灾害PPRN，其每个区域通常会在风险地图上通过对应其所面临的各类风险的代码进行标识。
风险地图上标注的所有风险区域均需纳入本类对象。受防护结构保护的区域也必须进行标注（可采用特殊标注方式），因为即便有防护结构，该区域仍可能面临风险（如防护结构破损或功能失效的情况）。
风险区域可视为经过开发的数据集，其来源于对多源计算、建模或实测风险数据的综合整合。此类源数据不属于本类对象的范畴，而是由另一项针对风险认知的标准进行规范。
研究区域内部分区域被认定为“无风险或可忽略风险区域”，即经过研究确认无风险的区域。此类区域不属于本类对象范畴，也无需作为风险区域进行标注。但对于自然类RPP而言，管控分区可将部分未面临风险的区域划定为指令区域（详见风险预防计划类别的定义）。