In urban areas of Hong Kong, air pollution is mainly caused by the emission from the vehicles, particularly diesel vehicles such as trucks, buses and light buses that emit a large amount of respirable suspended particulates (RSP) and nitrogen oxides (NO_x). These pollutants are then often trapped in between very tall buildings along the streets. The objective of this study is to understand how these pollutants are dispersed under different atmospheric conditions and the amount of contribution of these pollutants due to traffic emissions. The ADMS-Urban dispersion model has been used for this study to assess the model output against air quality standards and objectives. This project provides some case studies at Causeway Bay and Mongkok air quality monitoring stations (AQMS) and the sensi...[ Read more ]

In urban areas of Hong Kong, air pollution is mainly caused by the emission from the vehicles, particularly diesel vehicles such as trucks, buses and light buses that emit a large amount of respirable suspended particulates (RSP) and nitrogen oxides (NO_x). These pollutants are then often trapped in between very tall buildings along the streets. The objective of this study is to understand how these pollutants are dispersed under different atmospheric conditions and the amount of contribution of these pollutants due to traffic emissions. The ADMS-Urban dispersion model has been used for this study to assess the model output against air quality standards and objectives. This project provides some case studies at Causeway Bay and Mongkok air quality monitoring stations (AQMS) and the sensitivities study cases were carried out in order to help us make decisions on pollution control strategies and traffic planning.