Abstract
The concentrationof vehicular pollutants, wind, turbulence and traffic volume were measured in three different typical street canyons in Guangzhou City. Air dispersion in different types of urban canyons was compared. The configuration of a street is an important factor that influences air dispersion. In low wind conditions, it is rare that a stable vortex is formed in a canyon with irregular configuration. The movement of vehicles may dominate the flow near the surface of the narrow street canyon when tee wind at roof-level is weak. Simple operational models have been proposed. They performed well in predicting the air pollution due to vehicular emission in different street canyons in Guangzhou City.
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