Over the next 100 years, sea levels could rise so much that Copenhagen may face storm surges up to five meters above normal water levels.

To prepare for this, The Danish Ministry of Transport has launched a preliminary study ahead of a comprehensive storm surge plan. The plan is divided into four reports. While the Danish Coastal Authority (Kystdirektoratet) and The Danish Meteorological Institute examined the flood risks in the first report, SLA and Rambøll have contributed to the second report, published today, September 5, 2024.

In this second report, we explore whether and how key national assets, such as vital infrastructure and cultural heritage, can be protected against severe storm surges through an integrated solution rather than isolated measures.

The scenario analyzed is the worst possible storm surge that could hit Copenhagen by 2075. Our goal was to achieve “near-zero tolerance” in terms of flooding risk to infrastructure and buildings.

The report shows that such integrated protection is possible.

When starting the report, we conducted a comprehensive mapping of technology, environmental factors, and impacts on surrounding areas, identifying opportunities for initiatives that benefit both nature and people. From this, we developed design principles for how protection systems can consider the unique values and potential in the different locations.

The preliminary study is part of the Government’s Climate Adaptation Plan 1 and serves as a pilot project. This has allowed us consultants to develop new and innovative methods for addressing these complex challenges.

The report was led by Sund & Bælt and includes the municipalities of Copenhagen, Tårnby, Dragør, and Hvidovre.

All reports in the study are expected to be completed by the end of 2024, after which a comprehensive storm surge plan will be presented to the Danish government and the municipal local councils.

Learn more about the overall plan and timeline for the preliminary study here.