INSPIRE - Flood zones - Overflow Extreme return scenario in Wallonia (BE)

This INSPIRE compliant data layer gathers information from the extreme flood overflow scenario.

The data comes from the business data “Flood zones – Extreme return period scenario – Overflow” ( https://geoportail.wallonie.be/catalogue/fb42037b-3d7d-45a1-ac0c-19837803a674.html).

This data is part of the Flood Directive 2007/60/EC.
The mapping of flood zones for the extreme return period scenario is established for the Walloon part of the 4 international river basin districts (Meuse, Escaut, Rhine, Seine). It is imposed by the European Flood Directive (ED), or Directive 2007/60/EC of 23 October 2007 on the assessment and management of flood risks. It was approved by the Walloon Government on 4 March 2021 (MB: 24/03/2021).

This layer represents river overflow flooding for the extreme return period scenario (Text) corresponding to a low probability flood.

When the flood originates in the overflow of a watercourse, it corresponds to an area. It is represented by a height class with possible values of 0 to 30 cm; from 30cm to 1m30 or >1m30. Where this water level is unknown, the water level shall be considered as indeterminate.