应用OSPM模型计算太原市交通大气污染时空分布

文章以太原市机动车排放的实际数据结合气象因素与街道构造,采用OSPM模型计算了2008年太原市夏季（7月）与冬季（12月）车流量高峰期街道内的一次NOx与CO的小时浓度,验证了适用性,并使用模型对太原市55条主干道进行了扩散模拟计算,结果表明：OSPM模型可以较好地模拟太原市NOx与CO的扩散;太原市冬季交通大气污染物浓度要明显高于夏季;从空间分布上来看,污染物浓度基本与车流量分布一致;对比国家大气二级环境质量标准来看,太原市主干道NOx超标较为严重,夏季达到了83.64%,冬季达到了98.18%;夏季CO浓度计算结果全部在二级标准限值内,冬季超标率为16.36%。

Application of OSPM Model in Calculation of Spatio-Temporal Distribution of Traffic Air Pollution

Based on factual data of vehicle emission and meteorological conditions and street structure of Taiyuan,spatio-temporal distribution of annual average CO and NO concentration was calculated using OSPM model in the urban region,and validated its applicability.And use this model simulated traffic air diffusion in 55 main streets of Taiyuan.The results showed that：OSPM model can simulate the spread of NOx and CO in Taiyuan City well;Atmospheric pollutant concentration of transport in winter was significantly higher than in summer;From view of the spatial distribution,the distribution of pollutant concentrations and traffic volume are basically same;Contrast to the 2nd grade of national atmospheric environmental quality standard,over standard rate of NOx was more serious,reaching 83.64% in summer and 98.18% in winter;Summer CO concentration of calculation results were all within the 2nd grade of national atmospheric environmental quality standard limits and with a over rate of 16.36% in winter.