“十三五”雅安市城区环境空气质量状况及变化趋势分析

Analysis of the Ambient Air Quality and Change Trend of Urban Area in Ya’an During the Thirteenth Five-Year Plan

本文以雅安市城区为研究区域,根据“十三五”期间(2016~2020年)的空气质量监测数据,分析了雅安市近五年来空气质量现状以及大气污染物的年度、季度和小时变化特征。同时采用综合指数和污染负荷数法对空气质量进行评价,并与“十二五”末(2015年)的环境空气各污染物浓度作了比较。结果显示,在“十三五”期间,雅安市城区环境空气质量逐步改善,污染越来越轻,但臭氧污染比重逐年增加,到2020年已超过PM_(10)和PM_(2.5),有成为主要污染物的趋势。因此,要改善雅安市空气质量应在控制颗粒物排放和形成的同时,加大对臭氧污染的防控力度。

This paper takes the urban area of Ya’an as the research area,according to the air quality monitoring data during the"Thirteenth Five-Year Plan"period(2016~2020)to analyze the air quality status and the annual,quarterly and hourly changes of air pollutants in Ya’an in the past five years.At the same time,the comprehensive index and the pollution load number method are used to evaluate the air quality and compare it with the ambient air quality at the end of the"Twelfth Five-Year Plan"(2015).The results showed that during the Thirteenth five-year plan period,the air quality in Ya’an urban area improved gradually,and the pollution became lighter and lighter.However,the proportion of ozone pollution increased year by year,and by 2020,it had surpassed PM_(10)and PM_(2.5),and had a tendency to become the main pollutants.Therefore,to improve the air quality of Ya’an should effectively control the emission and formation of particulate matter,but also to strengthen the prevention and control of ozone pollution.