2013—2019年昆明市官渡区环境空气质量分析

Analysis of Environmental Air Quality from 2013-2019 in Guandu District,Kunming

根据官渡区2013—2019年环境空气质量监测数据和酸雨国控监测点的数据,分析了官渡区近年来的环境空气质量情况:在空气质量大幅提升的背景下,颗粒物污染逐渐得到控制,而臭氧污染的问题日益凸显;轻度污染天数由68d下降至15d,中度污染天数由3d降至0d;首要污染物是颗粒物的天数占轻、中度污染天数由2013年的80.3%下降至2019年的6.70%,而首要污染物是臭氧的天数由18.3%上升至93.30%;全区降水属于硫酸硝酸混合型,SO 2-4/NO-3比值逐年下降,说明NO-3逐渐升高,氮氧化物污染日益加剧。针对问题提出相应的对策。

Based on the monitoring data of the ambient air quality in Guandu District from 2013 to 2019 and the data of the national acid rain monitoring site,the ambient air quality in this district in recent years was analyzed.Under the background of the substantial improvement of the air quality,the concentration of particulate matter was gradually controlled,while the problem of ozone pollution became increasingly prominent.The number of mildly polluted days decreased from 68 to 15,and the number of moderately polluted days decreased from 3 to 0.The number of days with particulate matter as the primary pollutant decreased from 80.3%in 2013 to 6.70%in 2019,while the number of days with ozone as the primary pollutant increased from 18.3%to 93.30%.According to the analysis of precipitation monitoring results and atmospheric environment monitoring results,precipitation in the whole region belongs to the mixed type of sulfuric acid and nitric acid,and the SO 2-4/NO-3 ratio decreased year by year,indicating that NO-3 increased gradually and nitrogen oxide pollution intensified day by day.This paper put forward corresponding countermeasures for these problems in order to provide reference for the improvement of environmental air quality.