Research On The Measurement Of The Spatial Proximity Of Haze In Hebei Province

In recent years,the frequent occurrence of haze in some areas of China has strengthened the regional characteristics of haze.Hebei Province has become a serious area of haze pollution in China.Due to the influence of geographical environment,atmospheric circulation and economic level,combined with regional coordinated development,the dependence of haze among multiple cities presents a complex structural form,which also means that the effectiveness of unilateral haze control measures is bound to decline,and the current haze prevention and control mechanism needs to be adjusted according to regional correlation.Therefore,the research on the spatial relationship of haze in Hebei will provide an effective scientific basis for coordinated management and overall improvement of air quality in the region.Based on the hourly PM_2.5concentration data of multiple air quality monitoring stations in 11 cities of Hebei Province in 2013 and 2017,Using correlation analysis,spatial autocorrelation analysis and grey correlation analysis to investigate the spatial proximity of Urban Haze in Hebei Province.The results show that:?1?there is a significant spatial dependence of haze concentration value and concentration value in Hebei area,and the spatial neighborhood relationship of haze in adjacent areas is significantly higher than that in long-distance areas.?2?There is a significant spatial autocorrelation of the haze in Hebei Province.In the south,it is mainly in a high state,while in the north,it is in a low state.?3?There are obvious differences in the close degree of the relationship between the surrounding areas and the target city's haze,especially the strong correlation between the two areas has a higher degree of association,and the spatial neighborhood relationship is better.?4?In a word,the haze spatial neighborhood relationship between Handan,Xingtai and Shijiazhuang is better than that between other regions.The haze spatial neighborhood relationship between Cangzhou and Langfang in Baoding,Hengshui and Cangzhou is the second.The haze spatial neighborhood relationship between Zhangjiakou and Chengde,Qinhuangdao and Tangshan also shows a certain spatial neighborhood relationship.Therefore,it is considered that in the current process of regional haze control and joint prevention and control mechanism,the coverage of haze control cannot blindly pursue a large range,and the geographical distance and administrative relationship between regions must be fully considered to strengthen the coordinated management of the ecological environment in Beijing,Tianjin and Hebei.At the same time,according to the actual situation of each city,we should reasonably promote the process of Beijing Tianjin Hebei coordinated governance,implement various coordinated management schemes,and establish a governance system that can support its long-term operation.