Research On Atmospheric Environmental Impact Of Huaiyan Expressway

This thesis described the research progress of air pollutant above the transport Artery.The study of the source,pollution actuality state,the law of temporal and spatial variation,the impact factors of the air above the expressway at home and abroad were discussed emphatically;and evaluated the harm from NO₂,SO₂,TSP; and simply introduced the Monitoring methods of NO₂,SO₂,TSP.In order to study the law of temporal and spatial variation of NO₂,SO₂,TSP in the air above the Huaiyan Expressway,and to evaluate the pollution actuality state,the samples were collected from October 2006 to December 2007,The results shows:the influnces of automobiles on SO₂,TSP in the atmospheric environment was less,but that on NO₂ in the atmospheric environment was more,the major pollutant was NO₂;The average concentration of SO₂,TSP in the air in all sampling sites reached the secondary Evaluation standard of air quality,the average concentrations of NO₂ couldn't reach the standard in April and December.Daily variations of all air pollutants'concentration was less,and that of TSP was the least;Daily change rule of all air pollutants'concentration was different mainly in the peak values and ocurrence times in each sampling site in different months.The average concentration of air pollutants was different in different months, the permutation of SO₂,NO₂ was:December＞April＞September＞July,the permutation of TSP was:April＞December＞July＞September.The average concentration of NO₂,SO₂ down wind increased along with the increasing distances to the road-shoulder,when the wind speed was little and there's no obstacle objects around,the concentration minished in the range from 10 metres to 40 metres and kept stable out of the range,the average concentration of SO₂,NO₂ in the interchange was larger than that in the ordinary road sections;the concentration of SO₂,TSP in the woodland was less than the other road sections,but the difference was very little,and the average concentration of TSP in different road sections was too.The correlation between temperature,humidity,wind speed,automobiles and the concentration of SO₂,NO₂,TSP was analysed by sas6.12,the results shows:automobiles,temperature,humidity were the major impact factors on NO₂ in the air,temperature,humidity were the major impact factors on SO₂,humidity had much influence on TSP.At last,prevetion and control measures were set down in terms of pollution actuality state of Huaiyan Expressway.