CHAPTER 4: SUSTAINABILITY AND RESILIENCE IN A CHANGING WORLD


67


Box 21: Green Daegu Project to reduce the heat-island effect


Daegu, a city in the Republic of Korea, has undergone widespread development linked to industrialization and urbanization since the early 1980’s (Yoon et al. 1994). Daegu typically experienced higher temperatures than other regions because of its geographical location and high level of urban development. To counteract this effect, the city started creating green areas in 1996, and has planted 10 million trees in only 10 years – by 2016, a total of 35 million trees had been planted and there are plans to plant a total of 50 million trees by 2021. As a result of these efforts, the vegetation cover of the city has increased to more than 60 per cent and the maximum mid-summer temperature decreased by 1.2º Celsius compared to 30 years ago.


The expansion of urban forests have proven to be effective in reducing the heat-island effects as shown below.


Enhancing health and wellbeing


Two medium-sized trees can supply oxygen for a single person for a year


Enhancing economic vitality Large trees can add 5 – 15% to property values, 7% to rental prices, and increase shopper spending by 9 – 12%


Reducing effects of urban heat-islands Tree cover can reduce


surface temperatures by as much as 10 – 25o


Source: https://yoursay.tr.qld.gov.au/greenis/photos/34697 http://info.daegu.go.kr/newshome/mtnmain.php?mtnkey=articleview&mkey=scatelist&mkey2=2&aid=233786


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