冬季沈阳市典型源排放PM_(10)浓度分布模拟分析

Distribution simulation analysis of PM_(10) concentration from typical sources of Shenyang in winter

选取沈阳市7个典型的大气污染源2006年12月～2007年2月的PM10排放浓度资料，利用CALPUFF对PM10浓度月平均分布做模拟分析。模拟结果分析表明：冬季月平均PM10浓度分布的范围与风场、地形有直接的关系。地势平坦、风速大时，污染物扩散范围大，污染物浓度小；地势不平、风速小时，污染物扩散范围小，污染物浓度大。1月份是沈阳市冬季月平均大气污染最严重的月份，污染物分布主要集中在市区的北部、东部和南部地区，东部地区大气污染最为严重。

According to PM10 data of air pollution emissions selected from 7 typical pollution sources from December,2006 to February,2007 in Shenyang urban area, monthly mean PM10 concentration distribution was simulated by CALPUFF model. The results indicated that scope of distribution of monthly mean PM10 concentration in winter months was relative to wind field and terrain. The PM10 concentration value was lower and diffusion scope was bigger as the big wind speed and complex terrain. Oppositely, the PM10 concentration value was higher and diffusion scope was smaller as the small wind speed and simple terrain. January was the worst pollution month of monthly mean PM10 concentration in Shenyang. PM10 mainly distributes in the north,east and south urban areas and the biggest PM10 concentration was in the south urban area.