摘要
在沈阳市内选取PM10排放量较大的39个污染源排放资料,利用CALPUFF大气污染模式进行数值模拟。对地表类型资料中城市、建筑用地的范围进行了修正。对2010年3月-2011年2月沈阳市全年PM10浓度分布情况按春、夏、秋、冬四个季节进行模拟分析。结果表明:春季的扩散范围最大,2.5μg/m3浓度线基本覆盖了城区的西南部、中部和东北部,浓度分布呈南北方向对称,夏季的浓度分布呈西南、东北走向,秋季的污染物浓度扩散的方向是偏南和偏东北方向,冬季的扩散方向主要是偏南和偏东南方向。从城市规划的角度考虑,沈阳的西北部、西部、西南部受市内污染源排放的影响较小,其中西北方向受到的影响最小,小于1.0μg/m3。北部、东部和南部受市内污染源排放的影响较大,其中南部和北部方位污染物扩散的范围大,浓度值较低,约为1-3μg/m3,东部方位污染物扩散的范围小,浓度值高,最大值为5-7μg/m3。
Data of 39 pollution sources that produce relative more emissions in Shenyang city was chosen and the distribution of PM 10＇s concentration during spring,summer,autumn and winter（from March 2010 to February 2011） in Shenyang urban area was simulated by using of CALPUFF air pollution model.The ranges of building lands were amended in preparing the input data of surface types.The results showed that the diffuse range in spring was the largest,2.5μg/m3 contour in simulation figure covered the southwest,central and northeast of city area,the distribution of pollutant concentration was symmetrical in directions of both north and south.The distribution of contaminant in summer was in the direction of southwest and northeast,while the pollutant diffusion direction in fall was south and northeast.When it came to winter,the mainly spread direction of pollutant was southeast.From the point view of urban planning,the northwest,west,south-west of the city were less affected by the pollutant emissions and the least affected area was the northwest of Shenyang,less than 1.0μg/m3.The north,east and south of Shenyang were influenced by the pollutant emissions substantially.To be specially,the dispersion range of pollutant in the south and north of city was relatively large and the pollutant concentration was low,approximate 1-3μg/m3.In contrast,the dispersion range of pollutant in the east of city was small and the pollutant concentration was high,maximum value was 5-7μg/m3.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2014年第3期155-161,共7页
Journal of Arid Land Resources and Environment
基金
中央级公益性科研院所基本科研业务费(2011IAE-CMA10)
科技部公益性行业(气象)科研专项(GYHY201106033)资助
