Modeling Research Of SO₂ And NO_X Pollution In BaoTouBased On CMAQ Model

The city of Baotou is a typical heavy industrial city. The distribution pattern of BaoTou has been formed over the years with its eastern part focused on aluminium, western part on iron and steel, southern part on Chemical, northern part on Machinery and power stations located around the city. It determines the situation that the air pollution, especially the pollution of SO2and NOx, is one of the long-term environmental issues in Baotou.In order to maintain the existing development orientation of heavy industry and chemical industry and industrial space layout, it is available for us to choose the most scientific and effective means to solve this problem. This requires us to simulate local environmental changes and understand and grasp the trend of SO2 and NOx pollution.In this paper, CMAQ. model is utilized to input calculated lists of discharged pollution sources and to simulate the data of environmental air quality in BaoTou. The model constructed by means of comparison between monitoring sites and monitoring quantitive value, which has a margin of error of 20% between simulation value and monitoring value, is rather representative. After predicting, analyzing and calculating, a conclusion can be drawn that SO2 and NOx emissions of BaoTou in the year of 2017 and 2020 can be figured out andexisting situation of SO2and NOx in BaoTou in the year of 2017 and 2020 can be modeled by applying the tested model of CMAQ.We can come to the conclusion that if the control of polluted air is increasingly strengthened, though daily average concentration of SO2 in 2020 may reach the discharge standards, annual average concentration of NO2in some places (like BaoBai building) will exceed the proposed norms in 10% and it may still fail to meet the criterion. It is of great significance in carrying out works on the prevention of air pollution and thus offers the theoretical foundation for economical and efficient emission reduction measures in BaoTou.