[DDTM 76] Lézarde Watershed Hazard Area of the Lézarde Watershed

Area exposed to one or more hazards shown on the hazard map used for PPR risk analysis. The map d'random is the result of the study of hazards whose goal is to evaluate the intensity of each hazard at any point in the zone of study. The evaluation method is specific to each type of hazard. It leads to the delimitation of a set of zones on the perimeter d'study constituting a graduated zoning according to the level of l'aira. L' attribution of Â#x27;A level of #x27; hazard at a given point in the territory takes into account the probability of #x27; occurrence of the dangerous phenomenon and its degree of Â#x27; intensity. For multi-random PPRNs, each zone is usually spotted on the d'aira map by a code for each hazard to which it is exposed. All hazard zones shown on the hazard map are included. Areas protected by protective works must be represented (possibly specifically) because they are always considered subject to the hazard (case of rupture or d' inadequacy of the work). Hazard zones can be described as elaborated data as they result from a synthesis using several calculated, modelled or observed data sources. These source data are not affected by this class of objects but by another standard dealing with the knowledge of hazards. Some areas of the perimeter of the study are considered “zero or insignificant hazard zones”. It is the areas where the hazard has been studied and is zero. These zones are not included in class d'objects and n'are not to be represented as zones d'aira. However, in the case of natural PPRs, regulatory zoning may classify certain areas not exposed to the hazard zone as a prescribing zone (see ZonePPR class definition). __Origin__ The noise levels emitted by a given infrastructure during an average day are evaluated using numerical models producing isophone curves translated into noise zones, according to the index recommended for all modes of transport at European level, namely the Lden index and the Ln index. Strategic noise maps aggregate or translate these noise zones according to the type of strategic noise map, i.e. maps d' exposure to noise, areas affected by noise, maps of exceeding limit values, and maps d' known evolution or predictable noise level. Strategic noise maps, regulatoryly approved by the Prefect, must be re-engineered and revised every 5 years. Updates to strategic noise maps must cover several aspects of acquisition, data processing and publication of results: — with the correction, if applicable, on date N+ 1, errors made when drawing up documents on date N, — with the addition of all new data (new lanes, new buildings...) created between date N and date N+ 1. producer of the data: Gamba/VINCI Highways __Partner organisations__ DDTM Seine-Maritime __Links annexes__ * [XML metadata view](http://ogc.geo-ide.developpement-durable.gouv.fr/csw/all-dataset?REQUEST=GetRecordById&SERVICE=CSW&VERSION=2.0.2&RESULTTYPE=results&elementSetName=full&TYPENAMES=gmd:MD_Metadata&OUTPUTSCHEMA=http://www.isotc211.org/2005/gmd&ID=fr-120066022-jdd-5413211e-4bcb-4856-8755-cd7f6bb5a0a8) [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/0b9d8f187ea79771413c2b9b720939dbb0d7dce0)