SCREEN3模型在大气环境管理中的应用研究

Application of SCREEN3 Model in Atmospheric Environmental Management

基于高斯扩散的单源估算模式SCREEN3计算佛山市环境统计企业的SO_2排放最大落地浓度距离,发现全市工业企业SO_2排放最大落地浓度距离为0.4~13.5 km。其中水泥和火电等高架源的最大落地浓度的距离最远。佛山市及五区纳入环境统计的重点废气排放企业平均的SO_2排放最大落地浓度距离为2.9~4.9 km,能直接影响国控监测点位的企业合计37家,其中40%为高明区的企业。该结果证明加强空气质量国控监测点位周边至少5 km内废气排放企业的督查有利于空气质量的改善。

Using the Gaussian diffusion model SCREEN3,the maximum ground concentration distance of SO2 emitted from industries in Foshan city has been calculated. The results show that the distance of maximum ground concentration range from 0.4 to 13. 5 km in Foshan,and maximum ground concentration of the cement industry and the thermal power industry usually appear further than other industries. The mean distances of administrative divisions in Foshan range from 2. 9 to 4. 9 km. About 37 industries emitting SO2 can affect the monitored concentration at national air quality monitoring sites directly,of which 40% located in Gaoming. The findings approve that it is better to improve the SO2 pollution by enhancing the supervision of industrial exhaust emission around the monitoring sites within 5 km at least.