Norwegian Water Resources and Energy Directorate (NVE) Monica Bakkan Department for Landslides, Flood and River Management

Flood Inundation Maps Including a future climate

Produced Flood Inundation Maps since 1998.

Future climate influence Floods Sea level rise Landslides

Strategy Flood mapping and Land Use Planning > 20 % increase of a 200-year flood during the next 100 years

Research ”Hydrological projections for floods in Norway under a future climate”

Analyses 115 catchments 200-year and 1000-year flood Periodes; 2021-2050 and 2071-2100

Projected change Guidance has been developed using 3 categories: 0 % 20 % 40 % 200-year flood in 2071-2100

Conclusion Inland catchments dominated by spring/early summer snowmelt floods in today’s climate (0 % increase) Coastal locations and local source areas (20 % increase) Catchments < 100 km2 (20 % increase)

Implementation on Flood Maps Implementation of 200-year in 2100 Until to day -> 2 projects

Excample from Naustdal municipality on the Western coast Overview, The catchment 20 % increase

http://www.nve.no/PageFiles/18174/Flaumsonekart_200%c3%a5rsflaum_med_klima.pdf?epslanguage=no

Further works Uncertainty? Consequences? Historical vs. future data Restrictions Final version?.

Thank you for your attention!