Study on an Air Quality Evaluation Model for Beijing City Under Haze-Fog Pollution Based on New Ambient Air Quality Standards

International Journal of Environmental Research and Public Health

Li Li¹ 

[1] Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China; E-Mail

关键词: air quality;    comprehensive evaluation;    Ambient Air Quality Standards;    entropy weighting method;    nearest neighbor method;   

DOI  :  10.3390/ijerph110908909

来源: mdpi

【 摘 要 】

Since 2012, China has been facing haze-fog weather conditions, and haze-fog pollution and PM_2.5 have become hot topics. It is very necessary to evaluate and analyze the ecological status of the air environment of China, which is of great significance for environmental protection measures. In this study the current situation of haze-fog pollution in China was analyzed first, and the new Ambient Air Quality Standards were introduced. For the issue of air quality evaluation, a comprehensive evaluation model based on an entropy weighting method and nearest neighbor method was developed. The entropy weighting method was used to determine the weights of indicators, and the nearest neighbor method was utilized to evaluate the air quality levels. Then the comprehensive evaluation model was applied into the practical evaluation problems of air quality in Beijing to analyze the haze-fog pollution. Two simulation experiments were implemented in this study. One experiment included the indicator of PM_2.5 and was carried out based on the new Ambient Air Quality Standards (GB 3095-2012); the other experiment excluded PM_2.5 and was carried out based on the old Ambient Air Quality Standards (GB 3095-1996). Their results were compared, and the simulation results showed that PM_2.5 was an important indicator for air quality and the evaluation results of the new Air Quality Standards were more scientific than the old ones. The haze-fog pollution situation in Beijing City was also analyzed based on these results, and the corresponding management measures were suggested.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.