中文摘要：

通过对禅城区不同道路类型交通流进行调查分析，运用COPERT模式计算出2008年佛山地区机动车排放因子，分析出禅城区机动车尾气排放的主要来源及主要特征，得到了禅城区机动车尾气排放总量及排放分担率。根据佛山市辖区区间出行车辆较多的特点，采用源强估算总量的方法计算区内机动车污染排放。结果表明，禅城区2008年CO、NOx、VOC、PM的排放量分别为72356．86t、7288．38t、9991．68t和366．80t。不同车型对不同污染物的排放贡献率差别明显，尤以摩托车的CO、VOC排放贡献较高，分别占机动车排放污染物总量的85％和77％。道路局部污染最严重的道路类型为国道，整体污染最为严重的为主干路。区内机动车劣化严重，占机动车总量37％的国0车的CO、NOx、VOC、PM排放分担率分别占机动车排放总量的68％、45％、58％、63％。不同车型、不同排放标准的排放因子存在较大差别，轻型车的CO、VOC较高而重型车的NOx、PM排放因子较高。

英文摘要：

This paper takes it as its target to analyze the gas emission characteristics and distribution in the central areas of Foshan City while focusing the analysis on the annual vehicular emission and distribution of Chancheng district in 2008. As a rule, road traffic flow analysis should be based on the analysis of annual traffic flow statistics of different roads and vehicle types and their gas exhaust emission. In addition, it is the fundamental step for motor vehicle emission monitoring and control, for which an emission inventory for mobile source, the gas consumption and road network has to be worked out in a comprehensive manner. All the influential factors in Foshan area can be calculated by using a modle known as the COPERT mode. On the other hand, the total emission is calculated through the source intensity because there are too many boundary crossing vehicles in this area. The results show that the total exhaust of CO, NOx, VOC, PM from the motor vehicles are equal to 72 356.86 t, 72 88.38 t, 9 991.68 t, 366.80 t, respectively. Significant difference can be found here in the emission distribution rate among the different types of vehicles in different vehicle exhaustion whereas motorcycles make a major contribution to the emission of CO, VOC, which account for 85%, 77%. As to the emission intensity in state highway area, it is most severe emission in six road types with its arterial road account for 50% of total vehicular emission. The degradation rate of vehicle in this area is severe, legislation G-O vehicle which only account for 37 % in vehicle inventory but its contribution rates to the CO, NOx, VOC, PM, reach 68%, 45%, 58%, 63 %, respectively. Our investigation also shows great diversity in the emission factors of different vehicle categories, vehicle emission legislation, etc. Last of all, the emission factors of motor vehicle and light duty vehicle in CO, VOC are much higher than that of heavy duty vehicles, while in NOx and PM, heavy duty vehicles have to account for a much play more important rol