青岛市私家车排放清单及其分布特征

Emission inventory and distribution characteristics of private cars in Qingdao

为掌握青岛市私家车排放尾气污染现状,利用路网数据和实时交通信息,结合实地调研数据和排放因子,编制主城区私家车污染物排放清单。结果表明:(1)在2017年10-12月的工作日,青岛市主城区的私家车CO、碳氢化合物(HC)、NOx、PM2.5日排放量分别为17.18、9.36、11.77、8.51t/d。(2)在时间分布上,污染物排放呈现"双峰"特点。早高峰排放量峰值高、高峰持续时间相对较短,晚高峰的峰值略低、高峰持续时间相对较长,高峰期污染物排放量占40%以上。(3)污染物排放主要集中在城区多个商圈的结合处,道路交叉口排放量较高。同时,并不是路网密度越大,空间排放分布值越高。

In order to grasp the exhaust pollution status of private cars in Qingdao,the road network data and real-time traffic information was collected,which was combined with spot investigation data and emission factors to compile the pollutant emission inventory of private cars in main urban area.The results showed that:(1)the average emission of CO,HC,NOx and PM2.5 of private cars in main urban area was 17.18,9.36,11.77 and 8.51 t/d respectively on a working day from October to December 2017.(2)In terms of time distribution,the pollutants emissions had obvious"bimodal"characteristic with higher peak value in the morning and longer peak time in the afternoon,and the pollutant emissions of peak time accounted for over 40% of all day.(3)In terms of space distribution,the pollutants emissions mainly concentrated in the combination of multiple business districts in the urban area,the emissions of road intersections were higher,and the greater density of road network did not mean the higher emissions distribution values in space.