Numerical Simulation Of Regional Air Environment Based On Scenario Analysis

Parameters,including pollution's emissions of different local source,meteorological condition as well as dry and wet deposition,reflect completedly and have own characteristic,which display the unique characteristic respectively in different region.According to overall demand on the intergration project of the South Coal Coropation,Yangquan City,Shangxi Province,the aggregative model CALPUFF coupling MM5 was applied to simulate air environment of the full month in January, April,July and October in 2005 in Yangquan.According to simulation's result,HYSPLIT-4 was used to carry on transported path's simulation in the typical interval.Through the aggregative model's simulation,local emissions result in crucial influence on the air environment in Yangquan.The average density contribution to SO₂ is highest in January,reaching 131.8μg/m³;contribution to PM₁₀is 57.35μg/m³. The average density contribution to SO₂ and PM₁₀is respectively 108.73μg/m³ and 77.58μg/m³ in October.The local point emissions operate relatively high to SO₂.The average density contribution may reach 102.33μtg/m³ in January and may be 62.9μg/m³ in October.The influence of local area emissions is relatively high to PM₁₀. The average density contribution in October is highest,which may reach 67.02μg/m³.And the density contribution is 40.53μg/m³ in January.The outside emissions are low to air quality,but also have relatively tremendous influence in certain processes,which operate certain influence through the regional transportation.According to transportation simulation,the air pollutant on typical time in January arriving at Yangquan,which originates in the Mongolian border,may affect finally the Korean Peninsula and the Sakhalin Island area.In April,the air pollutant on typical time arriving at Yangquan,which originates in the Inner Mongulian area,may affect finally the Jilin and the Heilonhjiang area.In July,air pollutant on typical times originates within the boundaries Hebei Province,and affect finally the Shandong area.In October,the air pollutant on typical time originates within boundaries of Anhui,and affect finally north Henan.The simulated transportation paths indicate that the pollutant transportation has the same structure tallies with the low level flow field in the corresponding time.In the vertical direction,the pollutant pathline is below 700-850hpa,which has explained that the long transportation has stabilized in the underlying bed.Baded on the above conclusions,it is discovered the pollutant origin that affects air quality in Yangquan may be complex,and that the influencing facter is numerous.But the local emission is the primary facter for air pollution.