冬季沈阳市典型源排放PM_(10)浓度分布模拟分析

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。

Distribution simulation analysis of PM10 concentration from typical sources of Shenyang in winter

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.