Abstract
ABSTRACT Urban wind corridors are proven to improve outdoor thermal environments and have been gradually applied to urban planning recently. However, they may also lead to pollutants flowing throughout cities. Additionally, traffic-related air pollution remains a significant issue in Taiwan. Therefore, this study proposes to create microscale air quality zoning by street landscape. A series of CFD simulations is executed to evaluate the impact of trees and shrubs on the traffic-generated fine particles (PM2.5) distribution in roadside pedestrian areas. The results show that strategic tree placement with denser spacing can control PM2.5 to be concentrated in roadway areas while simultaneously forming air quality zoning. Shrubs are effective at blocking pollution from roadways and retaining cleaner air within pedestrian spaces. In this study, optimally spaced trees achieved an impressive 88% reduction in PM2.5 concertation in pedestrian spaces, while shrubs improved by 30% compared to scenarios without green planting.
Published Version
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