Abstract
Creating a green infrastructure that is effective for reducing fine dust is a significant challenge for urban landscape planners. In this study, a fine dust reduction planting model that can be applied to socially vulnerable area was developed, and its effects were verified. Using PM10, PM2.5, temperature, relative humidity, wind direction, and wind speed measured for approximately one year, the changes in the concentration of fine dust according to the weather conditions were investigated. As a result of the analysis, there was a significant difference in the concentration of fine dust inside and outside the planting zone (p < 0.05). In addition, there is a significant difference between the fine dust reduction effect of the multilayered planting model and the single planting model (p < 0.05). The paper’s main findings are as follows: (1) When the green cover rate is over 50%, the concentration of fine dust is lower than that outside the planting zones. (2) Multilayered planting zones are more effective in reducing the concentration of fine dust than single-structured planting zones. (3) Multilayered planting zones reduce the concentration of fine dust by changing the microclimate. The results of this study can be used as basic data for small urban planting design to reduce fine dust for children’s health in socially vulnerable areas.
Highlights
Since the International Agency for Research on Cancer (IARC) under the World HealthOrganization (WHO) designated fine dust as a first-class carcinogen in 2013 [1], people have become very interested in particulate matter (PM)
This study aims to analyze the fine dust reducing effect according to the density and structure of the plants by proposing a fine dust reduction planting model that can be applied to small urban green infrastructure
As urban green infrastructure has been shown to be effective in reducing fine dust, the demand to create green infrastructure to cope with the fine dust problem for children’s health is gradually increasing
Summary
Since the International Agency for Research on Cancer (IARC) under the World HealthOrganization (WHO) designated fine dust as a first-class carcinogen in 2013 [1], people have become very interested in particulate matter (PM). Long-term exposure to PM2.5 (fine particles, with diameters that are generally 2.5 micrometers and smaller) increases the risk of ischemic heart disease and stroke-related death [2]. On days when the level of PM is high, policy limits outdoor activities, which has a negative impact on outdoor-recreation-related industries [4]. The average annual PM2.5 concentration in Korea is 24.8 μg/m3 , the highest in the world and the highest among the 36 OECD countries [5]. To no longer be among the top countries for fine dust levels, Korea has enacted the Special Act on the Reduction and Management of Fine Dust and has implemented long- and short-term fine dust reduction policies for development, industry, road and transportation, and living sectors
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