摘要
于春季、秋季和冬季分别对北京市3类典型道路(开阔型、十字路口型、峡谷型)空气中CO污染进行了现场监测,对CO时空分布和影响因素进行分析。结果表明:十字路口CO平均浓度最高,为2.81mg/m3,CO日变化幅度较小,在中午上下班时间出现高峰,峡谷型道路次之,为2.55mg/m3,CO日变化呈单峰型,在中午前出现爬坡,下午有所降低,学院路CO污染最轻,CO平均浓度为2.39mg/m3,CO浓度日变化呈多峰型,早中晚高,其他时段较低;冬季CO污染最严重,平均浓度明显高于春季和秋季,分别为3.18mg/m3、2.49mg/m3,和2.45mg/m3;风向对CO的分布也有很大影响,背风面的CO浓度明显高于迎风面的CO浓度。
Three kinds of typical roads in Beijing were respectively selected to do study on CO pollution based on vehicle flow,road types and meteorological conditions in spring,autumn and winter.From the study of spatial and temporal distribution of CO and corresponding influencing factors,the results were as follows:because of vehicle flow and parameters such as link geometry of the road and meteorological conditions,the mean daily concentration of CO in the crossroad was the highest up to 2.81 mg/m3;the CO concent...
出处
《城市环境与城市生态》
CAS
CSCD
2009年第3期36-38,43,共4页
Urban Environment & Urban Ecology
基金
环保公益性行业科研专项(200709011)
关键词
城市道路
CO污染
车流量
气象条件
urban roads
CO pollution
vehicle flow
meteorological condition
