A Sustainable Floating City Is To Be Built Off the South Korean Coast

The project could provide a blueprint for coastal cities looking to combat rising sea levels.

By Bryan Hood 30/11/2021

It’s no secret that rising sea levels pose an existential threat to coastal life. Now, an ambitious new project in South Korea aims to address the climate phenomenon by building a sustainable city unaffected by rising waters—because it floats on top of them.

Busan, which is located on the southeastern tip of the Korean peninsula, has reached an agreement with UN-Habitat and Oceanix to build what would be the world’s first floating metropolis. The project could be completed as soon as 2025, and would help provide a blueprint for coastal cities looking to combat climate change.

Currently, 40 per cent of the world’s population and 90 per cent of its “megacities”—typically those with populations in excess of 10 million people—are located within 100km of a major coast, according to Oceanix’s press release. This makes those cities vulnerable to rising sea levels, which could displace millions of people in the coming decades and cause billions of dollars of damage to property and infrastructure.

Renderings of the sustainable floating city prototype off the coast of Busan, South Korea

What life could look like inside the sustainable floating city prototype Oceanix/Bjarke Ingels Group

With a population of 3.4 million, Busan may not qualify as a megacity, but it is South Korea’s largest port city and the fifth-largest in the world. The city isn’t just vulnerable to rising sea levels, though; it’s also been battered by typhoons and flooding in recent years, making it an ideal location for the vital experiment.

“It just happened that Busan is the best place for us to deploy this prototype,” Oceanix co-founder Itai Madamombe told Insider earlier this month. “But this is something that we hope will be useful to all coastal cities around the world, and all coastal communities who are facing the challenge of sea-level rise.”

Renderings of the sustainable floating city prototype off the coast of Busan, South Korea

What the modular platforms will look like under water Oceanix/Bjarke Ingels Group

The prototype for the city off the coast of Busan was conceived during the UN’s first roundtable on sustainable floating cities in 2019. It is designed by the Bjarke Ingels Group and consists of a number of modular hexagonal platforms that float on the water. It will be able to accommodate 10,000 people initially and will produce its own food (like scallops and kelp), energy and fresh water thanks to a fully integrated closed-loop system that creates no waste. The modular design will also help the city withstand natural disasters, including tsunamis, hurricanes and flooding.

UN-Habitat will collect and analyse data from the floating city and use the findings for future developments. It may all sound far-fetched, but Oceanix is said to be in talks with 10 other governments about similar projects, a number that could grow if the Busan prototype turns out to be a success.

Check out more renderings of the prototype city below:

Renderings of the sustainable floating city prototype off the coast of Busan, South Korea

Oceanix/Bjarke Ingels Group

Renderings of the sustainable floating city prototype off the coast of Busan, South Korea

Oceanix/Bjarke Ingels Group

Renderings of the sustainable floating city prototype off the coast of Busan, South Korea

Oceanix/Bjarke Ingels Group

Renderings of the sustainable floating city prototype off the coast of Busan, South Korea

Oceanix/Bjarke Ingels Group

Renderings of the sustainable floating city prototype off the coast of Busan, South Korea

Oceanix/Bjarke Ingels Group

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