A Three-Dimensional Air Quality Measurement Model in an Opened High Traffic Street Canyon Using an Explicit Finite Difference Method

摘要

The concentration of air pollutant is greatly affected by the urban design. The street-level air quality measurement is the most important factor of strategies on urban design. There has been relatively little attempt to includestreet-canyon air quality in the control of urban formation. In this research, a three-dimensional time-dependent air pollutant concentration measurement in several types of high traffic street canyons is proposed. A three-dimensional timedependent air pollutant dispersion model with several kind ofpollutant sources is considered. Various kinds of street canyon structure are also simulated. The Explicit finite difference techniques are used to visualize the considered model solution. The proposed numerical simulations provide positive agreeableresults. The comparison of calculated results of different conditions promises useful information for street canyon designs. The climate change is affecting outdoor air quality. The major challenges and opportunities found during outdoor air pollution studies will be highlighted.