Study on Pollution Contributions from Traffic in Beijing City.
Han Zhixiong, Xing Yulan, QuanBaoling (Beijing Municipal Research Institute of Environmental Protection)
This paper clearly defines the conceptions for both road and regional pollution contributions and gives a set of methods for the calculation of regional pollution contribution. As an example, the pollution contributions of CO, NOx, and THC, which are major pollutants from vehicles, were studied for an central area of 158 km2 of Beijing city. The study shows that the regional pollution contributions for CO, NOx and THC reached 14.3%, 32.2% and 86.6% in winter and 58.4%, 68.7%, and 86.6% in fall, respectively. While, the road pollution contributions for CO, NOx and THC reached 65.7%, 71.6%, and 37.6% in winter and 58.8%, 75.5% and 67.5% in fall, respectively.