南充市车流量对城市空气质量的影响分析

根据南充市城区SO2、NO2、PM10和PM2.5小时浓度数据,结合四种主要交通方式的车流量,分析车流量与空气质量相关性及其影响。结果表明,南充市城区每日车流量变化趋势呈现"四峰"现象,在08:00-09:00、11:00-12:00和14:00-15:00三个时段分别达到2650、2360和2677辆,第四个峰值可能在19:00或者之后;车流量以私家车和出租车为主,分别占总车流量的45%±4%和26%±3%。SO2、NO2质量浓度值基本稳定,为0.020 mg/m3左右,PM10和PM2.5的日平均浓度随日平均车流量变化比较明显,机动车流量对PM10、NO2的影响比SO2、PM2.5大。

Influence of Traffic Flows on Urban Air Ambient Quality in Nanchong,China

In this paper, the hourly mass concentration data of SO2,NO2.,PM10 and PM2.5,the traffic flows of the four main transportation modes were used to analyze the influence of traffic flows on urban ambient air quality in Nanchong, China. Results showed that the daily traffic flows presented the phenomenon of four peaks. The traffic flows are 2650, 2360 and 2677 at 08：00-09：00,11：00-12：00 and 14：00-15：00 and the fourth peak may appear on or after 19：00 respectively. The cars and taxis flows, accounted for 45 %±4 % and 26 %±3 %. SO2, NO2 concentrations were basically stable, about 0.020 mg/m3. The daily average PM10 and PM2.5 concentrations changed with the traffic flows. Motor vehicle traffic flows impacted on PM10, NO2 concentrations more obviously than on SO2 and PM2.5 concentrations.