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Swiss flood and landslide damage database

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Since 1972, we have been systematically recording the damage caused by storms on behalf of the federal government on the basis of newspaper reports. This has resulted in a database with currently more than 27,000 entries. This data helps in hazard assessment.

 

Damage originating from naturally triggered floods, debris flows, landslides and rockfalls have been considered. Not considered was damage from avalanches, snow pressure, earthquake, lithening, hail, windstorm and drought. The corresponding weather conditions were also noted in the database. In this way, a database with currently more than 20'000 entries has been generated.

 

All events since 1972 have caused damage amounting to 15 billion CHF (taking inflation into account) in total. The figure below shows that these costs are dominated by a few major events. The event of the 21th/22th of August 2005, with damage amounting to nearly 3,000 million CHF in total, was the most costly flood in Switzerland since 1972.

The spatial distribution of the damage from 1972 to 2021 and during some large events can be viewed on an interactive map.

The database can be analysed in terms of location, extent, causes and the temporal and spatial distribution of the storm events. The results are published yearly in the Journal "Wasser Energie Luft".

The damage data are provided to official institutions on request as a broad information basis for hazard assessment.
 

 
 

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