Official Flood Zones - Belgium - Flanders

The Official Flood Zones – Belgium (Flanders) dataset is a regional vector layer
delineating areas exposed to fluvial (river) flooding at three return periods, produced
in compliance with the EU Floods Directive (2007/60/EC) by Flemish authorities. The
dataset maps the spatial extent of flood inundation for 10-year (High), 100-year
(Moderate), and 1000-year (Low) recurrence interval events. It is essential for flood
risk assessment, insurance exposure modelling, urban planning, and regulatory compliance
with national and EU-level flood hazard mapping requirements.

Technical information

Data coincides with the actual GeoNetwork catalog record - this is our most recent verified data.

Interpreting the data

each polygon is classified by its return period attribute —
10 years (High risk, 10% annual probability), 100 years (Moderate risk, 1% annual
probability), and 1000 years (Low risk, 0.1% annual probability). Lower return periods
indicate more frequent, higher-probability flood events. The intensity score is inverted
relative to return period so that more frequent flooding scores higher.

Resolution and update frequency

vector polygons; accuracy depends on the source cartographic scale
(to be confirmed). Coverage limited to the Flanders region of Belgium. Aligned with
EU Floods Directive flood hazard map reporting cycles.

Source

to be added (Flanders Environment Agency — VMM / EU Floods Directive
implementation).

Related layers

Natural Hazards

Official Flood Zones - Belgium - Flanders

Belgium

Natural Hazards

Official Flood Zones - Belgium - Wallonia

Belgium