도시농업의 도시열섬현상 저감효과에 대한 계량화 평가연구

Urban Farm DB summary

A study quantitatively evaluated the effect of vegetation on urban heat island mitigation across six cities in South Korea, analyzing climate change data over 30 years (1979-2008) and estimating evapotranspiration (ET), CO2 uptake, O2 emission and ozone concentration. The hottest period was late July to early August, and the highest 10-day average urban ambient air temperature (UAAT) over the 30 years was 35.03°C. The mean maximum ET of rice and soybean in urban areas was 6.86 and 6.00 mm/day, respectively. Rice and soybean cultivation lowered UAAT by 10.5°C and 3.0°C in Suwon, while the differences between UAAT and canopy temperature at urban paddy and upland fields in Ansung were 2.6°C and 2.2°C. Urban gardens in Suwon lowered UAAT and building surface temperature by 2.0°C and 14.5°C, respectively. CO2 uptake by rice and soybean was estimated at 20.27 and 15.54 kg CO2 per 10a per day, and O2 emission at 14.74 and 11.30 kg O2 per 10a per day. During the hottest summer period, ozone concentrations were estimated to be reduced by 21.0, 8.8, and 4.0 ppb through rice cultivation, soybean cultivation, and urban gardening, respectively.