Analysis of the Trend of Environmental Air Quality in Nanning from 2015 to 2022
In order to scientifically evaluate the improvement effect of Nanning's air quality and provide decision-making support for air pollution prevention and control,the Spearman rank correlation coefficient method,KZ filtering method,ArcGIS spatial analysis and other methods were used to analyze the change trend and pollution characteristics of Nanning's air quality from 2015 to 2022 which was based on the daily monitoring datas of air quality.The results show that in the past 8 years,except for the significant increase in O3 concentration,most other indicators in Nanning have shown a significant downward trend.Evaluated by the composite index,ambient air quality in Nanning City showed an overall improving trend.The main pollutants in Nanning City are PM2.5 and O3,with a significant decrease in the number of days PM2.5 exceeds the standard,while the number of days ozone exceeds the standard shows a fluctuating upward trend.Ozone has become the main pollutant affecting the environmental air quality in Nanning City;the key period for the prevention and control of PM2.5 pollution in Nanning City is winter(December to February of the following year),with a focus on controlling straw incineration sources;August to October was the high Ozone pollution periods in Nanning City,with key control areas being Hengzhou City and Binyang County.
万方数据
维普
