AERMOD和CALPUFF干沉降在复杂地形下模拟结果的对比研究

Comparison on Simulation Results of AERMOD and CALPUFF Dry Deposition in Complex Terrain

以点源为例,选取SO_2,PM_(10)分别作为气态干沉降和颗粒物干沉降的代表污染物来研究污染物气态干沉降和颗粒物干沉降对AERMOD、CALPUFF两种模型的影响。结果表明,气态干沉降对两种模型的模拟结果影响均较小,颗粒物干沉降对AERMOD影响较大,对CALPUFF几乎没有影响。随着大气稳定度的增加,气态干沉降对AERMOD的影响趋势不明显,对CALPUFF的影响呈下降的趋势;颗粒物干沉降对AERMOD、CALPUFF的影响均呈现下降趋势,AERMOD下降趋势更明显。此外随着离源距离增加,两种模型干沉降通量基本呈下降趋势,但是在靠近山脚处,两者浓度及干沉降量均会发生明显变化。

Taking point source as an example, SO 2 and PM 10 are selected as the representative pollutants of gaseous dry deposition and particulate dry deposition respectively to study the effects of gaseous dry deposition and particulate dry deposition of pollutants on AERMOD and CALPUFF models. The result shows that gaseous dry deposition has little influence on simulation results of the two models, particulate dry deposition has a great influence on AERMOD and has little influence on CALPUFF. With the increase of atmospheric stability, the influence of gaseous dry deposition on AERMOD is not obvious, and the effect on CALPUFF is decreasing. The effects of dry deposition of particulate matter on AERMOD and CALPUFF are decreasing, and the decline trend of AERMOD is more obvious. In addition, as the distance from the source increases, the dry deposition fluxes of the two models show a downward trend, but at the foot of the mountain, the concentration and dry deposition of the two models will change significantly.