By December 22, 2019, flood hazard maps and flood risk maps were developed or updated for areas for which flood risks had been identified in 2018. The flood hazard maps show which areas could be flooded according to different probabilities of occurence. In Berlin, the following three flood scenarios are considered based on the FRMD:
- flood with a low probability or extreme event (rare event, HQselten/ HQextrem)
- flood with a medium probability (medium event, HQmittel)
- flood with a high probability (frequent event, HQhäufig).
Table 1 defines the flood events and flood scenarios according to the definitions by the River Basin Community Elbe.