Spatial Characteristics Analysis of Air Pollution around a City Traffic Main Road
The objective of this study was to characterize the spatial variability of PM2.5 and NOx concentrations due to arterial road traffic in a city in 2021.The emission rate parameters and pre-treated meteorological parameters were input into the research line-source dispersion model for simulation.It was found that traffic-related PM2.5 was mainly emitted by heavy trucks,while traffic-related nitrogen oxides were emitted by heavy trucks and small vehicles.The contribution of traffic to the average mass concentration of air pollution within the 20 m road buffer zone is PM2.5(0.90μg/m3)and NOx(29.23μg/m3),respectively,and the concentration of both pollutants decreases by nearly 40%within 500 m from the main road.Levels of traffic-related PM2.5 and NOx pollution are higher in winter than in the other three seasons.The traffic artery has an early morning rush hour and a relatively late afternoon rush hour.
NETL
NSTL
万方数据
