Cheonggyecheon Flashcards
Where is Cheonggyecheon?
Seoul in South Korea
What is the population density of Seoul?
17,000 people per square kilometre, making it twice as densely populated as New York and 8x more than Rome
In what year was the river restored?
2003
What happened to the river in 1961?
The river was completely covered over
What was built in 1971 that prevented evapotranspiration, damaged river flows and enclosed the river system?
An expressway
Why did the river need restoring?
Flow rates were very irregular which affected wildlife and sediment balance
Water quality was very poor
What were the main aims of the river restoration?
Improvement to the biodiversity
Improve the quality of life in the area
To increase business competitiveness and connectivity on either side of the river
What length of the river was restored?
5.8km
How many acres of land was restored?
1,000 acres
How much did the restoration cost?
$281 million
What were the benefits of the scheme?
22 bridges were created with a strong emphasis on public transport (increase in bus passes by 15.1%)
Water quality is higher - increased biological oxygen supply
Regular flow with height up to 40cm
What volume of water is pumped into Cheonggyecheon from the Hans river, tributaries and groundwater from subway stations?
120,000 tons of water
What is the minimum sustained flow of the river?
118 mm/hr
What is the flood protection in the area like after the restoration?
It can survive a one in a 200-year flood event
How much did biodiversity increase?
639%
