合肥城市绿化对粉尘粒径分布的影响研究

对合肥市不同绿地类型粉尘污染的粒径分布特征进行分析表明，绿化面积和车流量影响粉尘粒径的分布，绿化面积小的地段粉尘粒径主要分布在7～10μm；粒径数谱分析可表明，粒径分布总体均呈现单峰型分布，绿化面积较大区域的粒径分布特征呈现出良好的正态分布，林分组成单一、结构简单的地段PMIO的比例大。文中在上述研究结论的基础上，提出了增加城市绿化面积、控制车流量等方法，以．争口快缓解合肥市粉尘污染现状、优化市区环境。

A Study of Effect of Urban Greening in Hefei on Dust Particle Size Distribution

The analysis on the particle size distribution of dusts at various types of green spaces in Hefei showed that the greening area and the traffic flow affected the distribution of dust particle size, and the particle sizes in the area with small green space were mainly distributed at the range from 7 to 10μm. From the number spectrum analysis of the particle size, it showed that particle size generally presented a single - peak distribution, and particle sizes at the area with larger green spaces presented a good normal distribution while the area where forests were composed of a sin- gle, simple structure had the bigger proportion of PM10. Based on this study, the paper puts forward the measures ineluding increasing the area of urban green area, controlling the number of cars, etc. to reduce dust pollution and beautify the urban environment.