GERMANY · DESIGNATIONS · FLOODING

Hochwassergefahrenflächen HQextrem (bundesweit, WasserBLIcK)

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What this layer shows

Areas flooded by an extreme flood (HQextrem, low probability). Outside designated floodplains these are the risk areas under § 78b WHG, where flood protection must be taken into account when building. Compiled nationwide by the BfG (WasserBLIcK) from the Länder's flood hazard maps under the Floods Directive (3rd cycle 2022–2027); river and coastal flooding are included. What counts is the Land's own flood hazard map and the competent water authority, not this map.

Publisher and licence

WasserBLIcK/BfG und Zuständige Behörden der Länder, 2025 · CC BY 4.0

Official guidance ↗

Where the data comes from

ARCGIS · geoportal.bafg.de

Merestone asks this service live for the area on screen. Nothing is copied or stored beyond a short cache.

Facts shown for each feature

Art

In these presets

Wasser und Hochwasser

The water-law side of a site: drinking-water and medicinal-spring protection areas with their zones, designated flood plains and flood hazard maps, Saxony’s flood-generation areas, and bathing waters. Flood plains designated under § 76 WHG are subject to the construction safeguards in § 78 WHG, including statutory exceptions and possible approvals by the competent authority. The map does not replace the authority’s assessment of a specific proposal.

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