Area exposed to one or more hazards on the hazard map produced in connection with the development of PPRT JOUFFRAY DRILLAUD in Cissé, Vienna (86)
Description
Area exposed to one or more hazards shown on the hazard map used for PPR 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 perimeter of study 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 PPRTs the hazard levels are determined effect by effect on maps by type of effects and overall according to an aggregated level on a synthesis map.
All hazard areas shown on the hazard map are included. Areas protected by protective structures must be represented (possibly specifically) because they are always considered to be subject to hazard (case of rupture or insufficiency of the structure).
Hazard zones may be classified as compiled data to the extent that they result from a synthesis using several sources of hazard data calculated, modelled or observed. These source data are not concerned by this class of objects but by another standard dealing with knowledge of hazards.
Some areas of the study perimeter are considered “zero or insignificant hazard zones”.
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.
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