Sea-Level Rise The Impacts and Economic Costs of Sea-Level Rise on Coastal Zones in the EU and the Costs and Benefits of Adaptation

The document uses the Dynamic Interactive Vulnerability Assessment (DIVA) Model to project that under a medium-to-high emissions scenario (A1B(I)), annual damage costs in the EU could reach €25 billion by the 2080s, with 250,000 people flooded annually. It argues that a combination of mitigation (to limit long-term rise) and adaptation (such as dikes and beach nourishment) is the most effective response, noting that adaptation can reduce annual damage costs by up to 90% with a high benefit-to-cost ratio.

• Under the medium-to-high emissions scenario A1B(I), sea levels in Europe are projected to rise by 37 cm by the 2080s, while a stabilisation scenario (E1) consistent with the EU's 2 degrees target would reduce this rise to 26 cm by the 2080s.
• Without mitigation or adaptation, the A1B(I) scenario predicts that 55,000 people in the EU could be flooded annually by the 2050s, increasing to over 250,000 people by the 2080s, with an additional 438,000 people potentially forced to move due to annual flooding.
• Annual economic damage costs in Europe under the A1B(I) scenario are estimated at €11 billion for the 2050s and €25 billion by the 2080s, including direct impacts, salinisation, land loss, and relocation costs.
• Extreme sea-level rise scenarios, such as those projecting over 1 m by 2100, could increase annual damage costs for the EU to €156 billion by the 2080s, which is six times higher than the A1B scenario.
• Adaptation measures, specifically hard defences like dikes and soft measures like beach nourishment, can significantly reduce damages; for the A1B(I) scenario, adaptation could reduce annual damage costs by a factor of eight to €2.6 billion by the 2080s.
• The benefit-to-cost ratio for adaptation is high and increases over time, reaching 6:1 in the 2050s for the A1B(I) mid scenario and potentially up to 17:1 by the 2080s under the highest magnitude of sea-level rise.
• Annual capital costs for adaptation in the EU are estimated at €1.5 billion in the 2050s under the A1B scenario, with sea dikes accounting for 96% of costs in the present timeframe, though beach nourishment is projected to increase to over 15% by the end of the century.
• Sea-level rise poses a severe threat to EU wetlands, with estimates suggesting over 35% could be lost by the 2080s unless protective measures are implemented, potentially leading to 'coastal squeeze' where hard defences prevent inland migration of ecosystems.
• Damage costs and adaptation needs show a strong distributional pattern, with north-west European countries—specifically the Netherlands, UK, France, Germany, and Belgium—facing the highest potential damages and costs.

APA

Brown, S., Nicholls, R., Vafeidis, A., Hinkel, J., & Watkiss, P. (2011). Sea-Level Rise The Impacts and Economic Costs of Sea-Level Rise on Coastal Zones in the EU and the Costs and Benefits of Adaptation. Stockholm Environment Institute. https://www.sei.org/mediamanager/documents/Publications/sei-climatecost-sea-level-rise.pdf

Chicago

Brown, Sally, Robert Nicholls, Athanasios Vafeidis, Jochen Hinkel, and Paul Watkiss. Sea-Level Rise The Impacts and Economic Costs of Sea-Level Rise on Coastal Zones in the EU and the Costs and Benefits of Adaptation. Stockholm Environment Institute, 2011. https://www.sei.org/mediamanager/documents/Publications/sei-climatecost-sea-level-rise.pdf.

Wikipedia

{{cite report |last1=Brown |first1=Sally |last2=Nicholls |first2=Robert |last3=Vafeidis |first3=Athanasios |last4=Hinkel |first4=Jochen |last5=Watkiss |first5=Paul |title=Sea-Level Rise The Impacts and Economic Costs of Sea-Level Rise on Coastal Zones in the EU and the Costs and Benefits of Adaptation |publisher=Stockholm Environment Institute |date=September 2011 |url=https://www.sei.org/mediamanager/documents/Publications/sei-climatecost-sea-level-rise.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{brown2011sealevel, author = {Brown, Sally and Nicholls, Robert and Vafeidis, Athanasios and Hinkel, Jochen and Watkiss, Paul}, title = {{Sea-Level Rise The Impacts and Economic Costs of Sea-Level Rise on Coastal Zones in the EU and the Costs and Benefits of Adaptation}}, institution = {Stockholm Environment Institute}, year = {2011}, month = sep, url = {https://www.sei.org/mediamanager/documents/Publications/sei-climatecost-sea-level-rise.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }