| With the development of economy and society and the improvement of people’s living standard,the problem of environmental air pollution has become one of the focuses.The state has built ecological civilization and environmental protection as a basic national policy.Ambient air quality is a quantitative index to evaluate ambient air pollution.According to the latest environmental air quality standards in China,the basic indexes of environmental air quality include six,namely,sulfur dioxide(SO2),nitrogen dioxide(NO2),carbon monoxide(CO),ozone(O3),inhalable particulate matter(PM10),and fine particles(PM2.5).The concentration of these six pollutants in the ambient air reflects the quality of the ambient air.Different environmental air pollutants have different sources of production and different digestion and diffusion methods,which leads to the different changes in the concentration of these indexes in the same time and space.Based on the above cognition,we collect data of 2013-2017 years automatic monitoring of environmental air quality in a district administrative region of Guangzhou(Panyu District of Guangzhou city).Its own characteristics.The variation trend of the concentration of sulfur dioxide,nitrogen dioxide and carbon monoxide in one day is relatively obvious;the tendency of the concentration of inhalable particles and fine particles in a day is not obvious;the trend of the ozone concentration in the one day of different seasons is similar;deodorizing oxygen,different seasons.In a day,there are different regularities in the variation trend of hourly mean values of other pollutants in ambient air.In different seasons,the daily average concentration of ambient air pollutants showed a different trend.In the same year in the same year in the same year in January,the daily mean value of ambient air pollutants is different,but there is a certain regularity.The regularity of the daily average concentration of sulfur dioxide,carbon monoxide,inhalable particulate matter and fine particles in the same year in the same year in the same January,nitrogen dioxide and odor Oxygen is relatively not obvious.In different years,the change trend of monthly mean concentration of each pollutant is basically the same,and the change trend of the monthly mean concentration of four kinds of pollutants,sulfur dioxide,nitrogen dioxide,inhalable particulate matter and fine particulate matter,is characterized by high winter and spring season and low summer and autumn season.The peak value appeared in January and December,and the valley value generally appeared in June and July,and the monthly mean concentration of ozone showed high summer and autumn season and low winter and spring season.The peak value appeared in September and October,and the valley value appeared in January and December.The monthly mean concentration of carbon monoxide showed a stable trend throughout the whole year.In the 2013-2017 years,the annual concentration of carbon monoxide,inhalable particulate matter and fine particles in the ambient air of Panyu District was in a declining channel,and sulfur dioxide also showed a declining trend year by year.In 2017,a small rebound appeared,and nitrogen dioxide and ozone showed waves.Judging from the comprehensive index of environmental quality,in the 2013-2017 year,the ambient air quality in Panyu District of Guangzhou showed a continuous improvement.Of these 2013-2016 years,the effect of improvement is very obvious.Finally,through the analysis and study of the changing trend and law of the historical data of environmental air quality in Panyu District,Guangzhou,2013-2017 years,combined with various factors affecting the environmental air quality,such as the internal,geographical,terrain,climate and weather conditions,the distribution of the surrounding pollution sources,national laws and regulations and policies,local administration.The government’s industrial development plan and other factors will predict the future trend of ambient air quality in Panyu District,Guangzhou. |
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