The unique fabric of the Hong Kong urban area consists of tall and bulky buildings as well as tight and narrow streets that resulted in deep urban canyons. The air pollutants emitted by urban pollution sources including tailpipe emissions from vehicles would be trapped within these urban canyons due to poor dispersion and dilution of air pollutants. Improvement of the air ventilation performance of planned urban development, in particular at pedestrian level, is a useful mean to reduce the accumulation of air pollutants within deep street canyons. With the use of 3-D CFD modeling techniques for AVA and Gaussian air dispersion modeling for traffic air quality assessment, we can design and plan our city fabric for better natural air ventilation and healthier living environment.
展开▼
