新冠肺炎疫情管控期间达州市主城区环境空气质量达标率下降原因分析

Analysis of the Reasons for the Decline of the Ambient Air Quality Compliance Rate in the Main Urban Area of Dazhou during the COVID-19 Epidemic Control Period

为了解释2020年新冠肺炎疫情爆发期间达州市主城区空气质量本应好转却同比变差的现象,通过污染源调查、与周边城市同时期空气质量比较、上年同比分析、结合主城区地形和气象条件,分析了疫情管控期间空气质量达标率下降的原因,同时也确定了影响其空气质量的主要(重要)因素。

In order to explain the phenomenon that the air quality in the main urban area of Dazhou City should have improved but have dropped actually during the outbreak of the COVID-19 in 2020, through pollution source investigation, comparison of air quality with surrounding cities in the same period, year-on-year analysis of the previous year, combined with the topography and me-teorological conditions of the main urban area, analyzed the reasons for the deterioration of air quality during the epidemic, and at the same time determined the main factors that usually affect its air quality.