城市大气污染扩散GIS模拟分析--以福州市为例

以福州市为例,分析了GIS在环境模型研究中的主要应用范围;剖析了GIS与环境模型结合的三种层次。在 GIS技术支持下建立了城市点源和线源大气污染扩散模型,采用大气污染扩散模型与GIS的嵌入式的紧密集成技术,进行福州市大气污染扩散模拟,直接采用等值线的方式表达大气污染物在不同气象条件下空间分布模拟结果, 为城市大气污染源的管理和时空模拟提供了一个良好的可视化分析环境。模拟结果表明:2000年福州市区工业路附近区域与福新路附近区域出现SO2高浓度;湖东路、八一七路、福新路、六一北路围成区域出现NOx高浓度,为机动车污染严重的区域。污染物浓度分布与污染源的空间分布和排放量密切相关。

GIS-based Urban Atmospheric Dispersion Model--A Case Study in Fuzhou

In this paper, the potential of integrated GIS with Environmental Modeling was analyzed, different levels and status of integration technique were introduced, and the point source dispersion model and line source dispersion model for Fuzhou city were built with the support of GIS. By means of the assembled technique integrating GIS with environmental model, the dispersion of air pollutant was simulated. The simulation result under different meteorological conditions was directly expressed via routes of isopleth, which offered one good visualization analysis environment for the management of city air pollution resource and pollution dispersion simulation. The result showed that the SO2 mustered around Gongye Road and Fuxin Road and the NOx mustered the districts which are encircled by the roads of Hudong, Bayiqi, Fuxin and Liuyibei in Fuzhou in 2000. The distribution of pollutant concentration is closely correlated to the distribution of pollution source and the discharge of pollutant.