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Cheonggyecheon river history and restoration

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  • Cheonggyecheon river history and restoration
  • Seoul Metropolitan Government


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Title Cheonggyecheon river history and restoration
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Material Type Video
Publisher

[Seoul, South Korea] : Seoul Metropolitan Government

Date 2014-11
Subject Country South Korea(Asia and Pacific)
Language English
File Type Link
Subject Territorial Development < National Land Development
Territorial Development < Environment
Holding Youtube
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Abstract

A complex, expensive greenway was constructed in Seoul, Korea. It spanned the city and involved removing an expressway yet was completed in 2-1/2 years. Provides flood protection for up to a 200-year flood event and can sustain a flow rate of 118mm/hr. Increased overall biodiversity by 639% between the pre-restoration work in 2003 and the end of 2008 with the number of plant species increasing from 62 to 308, fish species from 4 to 25, bird species from 6 to 36, aquatic invertebrate species from 5 to 53, insect species from 15 to 192, mammals from 2 to 4, and amphibians from 4 to 8. Reduces the urban heat island effect with temperatures along the stream 3.3° to 5.9°C cooler than on a parallel road 4-7 blocks away. This results from the removal of the paved expressway, the cooling effect of the stream, increased vegetation, reduction in auto trips, and a 2.2-7.8% increase in wind speeds moving through the corridor.