上海市汽车排放污染物的扩散仿真

Simulation for Dispersion of Automobile Exhaust Pollutants in Shanghai Urban Area

以梯度理论为基础，根据城市大气污染和扩散的特点，建立了一种城市汽车排气污染扩散模型．在该模型中考虑了道路的分布、道路中汽车的车流率、各种车型污染物的排放率以及气象条件等因素．利用此模型对上海市区的汽车排气大气污染情况进行了仿真，其仿真结果与实测数据相符合．同时利用此模型对２０１０年上海的汽车排气污染作了预测．最后对上海市的大气污染情况作了分析并提出了一些改进措施．

Based on theory of gradient transport, an urban air quality simulation model suitable for automobile exhaust pollution is developed.In the simulation model,street distribution,traffic flow in each street,emission rates of different type of automobile and meteorological conditions are taken into account.With this model,the simulations of automobile exhaust pollution in Shanghai downtown area are made.The results are well accordant with the measurments.Then a prediction of automobile exhaust pollution in Shanghai in 2010 is also made.In the end,the air pollution situation from automobile exhaust in Shanghai is analiyed and some improvements are presented.