Micro-scale Consideration Of Air Dispersion
In Urban Street Canyons
Author(s)
S.-D. Kim, S.-K. Park, H. Lee, D.-S. Kim & J.-H. Kim
Abstract
The vehicle-originated air pollution has a significant impact on the ambient air
quality in urban areas and creates a certain amount of health risk to the public.
Especially in urban street canyon environments, high levels of air pollution are
frequently observed due to the increased traffic volume and reduced natural
ventilation by building forests. The dispersion of vehicle emissions in urban
environments is also limited by various factors, which may produce poor air
qualities in urban street canyon environments. This poor air quality has a high
potential to be easily delivered into the indoor air environment by building
ventilation.
In this study, the dispersion of vehicle emissions was characterized by
employing wind tunnel tests and tracer gas techniques. The aspect ratio of a
street canyon (i.e. the ratio of the width of a street and the average height of
buildings) and the direction of external wind are the major test parameters.
Keywords: urban street canyon, vehicle emission, air pollutant dispersion, wind
tunnel test.
1 Introduction
The air dispersion in an urban area with highly crowded buildings has a
significant difference from a flat terrain and the traffic is frequently high in
Keywords
urban street canyon, vehicle emission, air pollutant dispersion, wind
tunnel test.
Related Book
Other papers in this volume
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