Plan for the prevention of natural hazards of movement of land — Municipality of Montjoi — Area of hazard — Department of Tarn-et-Garonne

Area exposed to one or more hazards shown on the hazard map used for the RPP risk analysis.
The hazard map is the result of the study of hazards whose objective is to assess the intensity of each hazard at any point in the study area. The assessment method is specific to each type of hazard. It leads to the delimitation of a set of zones on the study perimeter constituting a graduated zoning according to the level of the hazard. The assignment 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 works must be represented (possibly in a specific way) because they are always considered subject to hazard (case of rupture or insufficiency of the structure).
Hazard zones can be described as elaborated data to the extent that they result from a synthesis using several calculated, modelled or observed hazard data sources. These source data are not concerned by this class of objects but by another standard dealing with the knowledge of hazards.
Some areas of the study perimeter are considered “zero or insignificant hazard areas”. These are the areas where the hazard has been studied and is zero. 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 PPRs, regulatory zoning may classify certain areas not exposed to hazard as a prescribing zone (see definition of ZonePPR class).

本类区域指用于RPP风险分析的灾害地图上标注的、受一种或多种灾害威胁的区域。
灾害地图是灾害专项研究的成果，其核心目标为评估研究区域内任意点位的各类灾害强度。针对不同灾害类型，需采用专属评估方法，据此在研究范围内划定一系列按灾害等级分级的区域。对境内某一给定点位的灾害等级进行赋值时，需综合考量该危险现象的发生概率及其强度等级。
针对多随机PPRN，灾害地图上的每个区域通常会通过其所受灾害对应的专属编码进行标识。
本类涵盖灾害地图上标注的全部灾害影响区域。经防护工程保护的区域也必须予以标注（可采用特定方式），因为即便受防护，该区域仍存在灾害风险（如防护结构发生破损或效能不足的情况）。
灾害区域可被视为精细化加工数据：其生成过程需整合多类经计算、建模或观测得到的灾害源数据。本类对象不涵盖这些源数据，相关源数据归属于另一项灾害认知相关的标准规范。
研究范围内的部分区域被视为"零灾害或灾害可忽略区域"，即经研究确认无灾害风险的区域。此类区域不属于本类对象范畴，无需作为灾害区域进行标注。但针对天然PPR，监管区划可能将部分未受灾害威胁的区域划定为"规定管控区"（详见ZonePPR类的定义）。