合肥市PM2.5与用地类型特征比较及建设性方案研究

通过对合肥市环境空气质量指数进行分析比对,研究了合肥市明珠广场、三里街、琥珀山庄、董铺水库及长江中路五个地区的空气质量情况,并进行对比分析.结果显示合肥市空气的首要污染物为PM2.5,其来源与汽车尾气排放有很大关系;大气污染物氮氧化物与空气质量有明显的滞后关系;大气污染物SO2对合肥市的空气质量没有明显影响.研究发现空气质量与用地类型有密切的关系,远离市区的城郊地带空气质量最好,市区中绿化较好的居民小区空气质量相对较好,空气质量最为严重的是市中心缺乏绿化带的主干道,尤其以上下班交通拥堵时是空气质量下降最快的时刻.最后以合肥市为例,探寻降低大气污染的建设性方法.

Correlations between PM2.5 with Land Use Types in Hefei and Constructive Solutions

Through the analysis on ambient air quality index of Hefei City, this article researched and made contrastive analy- sis on air quality situation in five different places of Hefei City, Mingzhu Square, Three Mile Street, Amber Mountain Villa, Dongpu Reservoir and Changjiang Middle Road. Results show that the primary air pollutant in Hefei was considered as PM2.5, having a lot to do with its motor vehicle emission. Atmospheric pollutants nitrogen oxides have an obvious relationship with air quality; atmospheric pollutants SO2 did not significantly affect the air quality of Hefei. The study found that air quality has close relationship with land use types, air quality of suburban area is the best, residential area with good urban greening has better air quality. Air quality was the worst in downtown main road without green belts, especially during traffic jams in rush hours. Taking an example of Hefei, this paper searched for a constructive way to reduce air pollution.