地表参数设置对高架点源大气污染物扩散预测的影响研究

以某火电厂高架点源为例,运用AERMOD进行预测,对扇区进行粗划分和细划分,设置两组地表参数,分析SO2、NO2、PM10在敏感点的小时浓度、日均浓度和期间平均浓度最大值的差异.变化幅度分析方法表明,PM10的小时浓度、日均浓度、期间平均浓度最大值的变化幅度最大,NO2次之,SO2最小.高端值比较法分析表明,NO2小时浓度最大值的差异最大,SO2次之,PM10最小;NO2日均浓度最大值的差异最大,PM10次之,SO2最小;NO2期间平均浓度最大值的差异最大,SO2次之,PM10最小.

Study on Effect of Surface Parameter Setting on AirPollutant Diffusion Prediction in Elevated Point Source

Taking a point source of a thermal power plant as an example, the paper divide the sector into two groups:surface roughness and fine division.It devides two sets of land surface parameters to analyze the different of the hourly concentration of SO2, NO2 and PM10 at the sensitive point, the daily average concentration and the period average concentration.The change range of the maximum concentration of PM10, hourly concentration, daily average concentration and period concentration is the highest, NO2 followed, SO2 is the smallest.Analysis of high value comparison shows that the different of maximum NO2 concentration is the largest, SO2 followed, PM10 is the smallest.The different of daily average maximum value NO2 concentration is the largest, PM10 followed, SO2 is the smallest.The difference of period average maximum NO2 concentration is the largest, SO2 followed, PM10 is the smallest.