View In:   ArcGIS Online Map Viewer

Name: Zones de "sur-aléa" submersion marine très fort

Display Field: id_obj

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: <DIV STYLE="text-align:Left;font-size:12pt"><P><SPAN>La submersion marine désigne une inondation temporaire de la zone côtière par la mer lors du passage d'un cyclone. 4 niveaux (faible, moyen, fort, très fort) d'aléas de période de retour 100 ans sont cartographiés, ainsi que 2 bandes traduisant un "sur-aléa" très fort: la bande de précaution qui correspond à la rupture éventuelle d’un ouvrage de protection, la bande de choc mécanique des vagues en raison des fortes vitesses, de l'action de la houle et des possibles projections de galets ou de coraux.</SPAN></P><P><SPAN /></P><P><SPAN /></P><P><SPAN>Généalogie</SPAN></P><P><SPAN>Fusion des zones d'aléa de référence par débordement et par franchissement, puis lissage des contours des polygones.</SPAN></P><P><SPAN>Fusion réalisée par la DEAL avec les bandes de sécurité et de précaution (choc mécanique des vagues)</SPAN></P></DIV>

Service Item Id: cab0d59969f5491c83acb04ee899fcf2

Copyright Text: BRGM, DEAL Mayotte

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• Value: Submersion marine d'origine cyclonique (bande de précaution)
  Label: Bande de précaution
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ID: Submersion marine d'origine cyclonique (bande de précaution)
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---

ID: Submersion marine d'origine cyclonique (bande de sécurité)
Name: Bande de sécurité
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• Name: Bande de sécurité
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