| PM2.5 has become one of the main causes of haze pollution.Based on the environmental monitoring data of Tongchuan City,this paper analyzes the regularity and characteristics of PM2.5 pollution in the atmosphere of Tongchuan City,analyzes the influence of meteorological conditions on pollution in combination with meteorological factors,and puts forward some countermeasures,which can provide some basic information and policy reference for Tongchuan City air pollution control.The research results show that:In recent years,the air quality of Tongchuan City is mostly good,followed by slight pollution,accounting for 85%of the total days.From 2014 to 2017,the average concentrations were 69 ug/m3,58.242 ug/m3,58.896 ug/m3 and 53.786 ug/m3,showing a downward trend.The pollution factors affecting air quality in Tongchuan were PM2.5,O3 and PM10,and PM2.5 was the primary pollutant.In the polluted days from 2015 to2017,the main pollutants were fine particulate matter(PM2.5)accounting for 36.7%,ozone?O3?33.7%,and particulate matter(PM10)accounting for 29.6%.The pollution degree of PM2.5 in Tongchuan City from low to high is summer,spring,autumn and winter.The PM2.5 concentration in heating season is significantly higher than that in non-heating season,and that in dry season is significantly higher than that in wet season.Among meteorological factors,sunshine,08 air temperature-08 dew temperature,08 air pressure,average air pressure,02 wind speed,08 wind speed,14wind speed,20 wind speed and average wind speed are negatively correlated;08 air temperature,daily average temperature,maximum temperature,minimum temperature,08 humidity,average humidity and total cloud amount are positively correlated.Traditional production and life style and urban construction are the main causes of air pollution in Tongchuan City.Coal consumption,industrial production,motor vehicles and dust are the main sources of PM2.5 pollutants in Tongchuan City,and relevant countermeasures are put forward. |
PDF Full Text Request