How Did Seoul’s Cheonggyecheon River Restoration Get Its Start? TNOC Podcast Episode 10


Art, Science, Action: Green Cities Re-imagined

Philip Silva

Philip Silva New York

Philip’s work focuses on informal adult learning and participatory action research in social-ecological systems. He is dedicated to exploring nature in all of its urban expressions.

David Maddox

David Maddox New York

David loves urban spaces and nature. He loves creativity and collaboration. He loves theatre and music. In his life and work he has practiced in all of these as, in various moments, a scientist, a climate change researcher, a land steward, an ecological practitioner, composer, a playwright, a musician, an actor, and a theatre director. David’s dad told him once that he needed a back up plan, something to “fall back on”. So he bought a tuba.

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The Cheonggyecheon "River" then, as a highway.
The Cheonggyecheon “River” then, covered up by a highway.

Story Notes: A casual chat on a bus nearly thirty years ago led to the improbable removal of a major elevated highway and the restoration of a beloved river in the old city center of Seoul in South Korea.

Dr. Soo Hong Noh, a professor of environmental engineering at Yonsei University, became a champion for bringing back the Cheonggyecheon River in his home city after listening to a colleague fancifully muse about the river’s restoration while they sat together on their evening commute.

The idea stuck, and after a research sabbatical at Ottawa University in Canada, Dr. Noh came back to Seoul intent on finding a way to replace the four-lane Cheonggyecheon Highway with the hidden river from which it got its name.

The daylighted and restored Cheonggyecheon today. Photo: David Maddox
The daylighted and restored Cheonggyecheon today. Photo: David Maddox

In this podcast, produced by Philip Silva, Dr. Noh recounts his work to restore the Cheonggyecheon River, a tale that begins with that fateful bus ride in 1989 and continues through to the present day with similar highway removal efforts around the world drawing inspiration from South Korea. Dr. Noh recently delivered a presentation on the Cheonggyecheon restoration at TransitCenter, a think tank and philanthropic foundation based in New York City.

We caught up with him before his lecture and included some of his public remarks in this podcast.

The Cheonggyecheon restoration. Photo: David Maddox
The Cheonggyecheon restoration. Photo: David Maddox
An art installation on the Cheonggyecheon. Photo: David Maddox
An art installation on the Cheonggyecheon. Photo: David Maddox
Dr. Noh speaking at Transit Center in New York. Photo: Philip Silva.
Dr. Noh speaking at Transit Center in New York. Photo: Philip Silva


  1. Ingo Schuder Avatar
    Ingo Schuder

    This is an amazing success story. Shows value of nature – #naturalcapital. Many cities in Europe and UK should follow to secure the benefits of river restoration.
    Dr ingo Schuder, Green Infrastructure Consultant, Brillianto, Oxfordshire, UK

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