| In recent years,with the progress of urbanization in China,the phenomenon of green space destruction,traffic pollution,and air pollution has been serious.Air pollution has seriously affected people’s physical and mental health,and it has also brought many adverse effects on social and economic development.Pay attention to the problem of haze pollution.In recent years,the country attaches great importance to air pollution control,and smog pollution based on PM2.5 has achieved remarkable results.However,the air pollution problem in Beijing,Tianjin and Hebei is still serious,and the smog pollution control has a long way to go.Due to the complexity and long-term characteristics of smog pollution,smog pollution in different cities has mutual influence and linkage effect.The interaction of smog pollution between cities increases the difficulty of joint prevention and joint control of pollution control in smog regions.Therefore,at this stage,understanding the spatial distribution of smog pollution in Beijing-Tianjin-Hebei region and examining the spatial effects between smog pollution and economic development level,industrial structure,and foreign trade are of great significance to the regional joint prevention and control of smog control.The thesis is divided into five parts.First of all,the literatures at home and abroad were combed from the aspects of research area and influencing factors,and the related theory of haze was explained from the perspectives of haze measurement indicators,formation mechanism and hazards.the reason.Then,from different perspectives,mainly for the socio-economic factors,the natural and socio-economic conditions of the Beijing-Tianjin-Hebei region were analyzed,mainly including terrain,wind direction,economic development,population density,industrial structure,and foreign investment.A preliminary analysis is made on the impact of these factors on smog pollution in Beijing,Tianjin and Hebei.Then,the Kriging spatial interpolation method was used to study the temporal and spatial distribution characteristics of air quality in the Beijing-Tianjin-Hebeiregion.The spatial global autocorrelation and spatial local autocorrelation analysis in spatial statistics were used to analyze the Beijing-Tianjin-Hebe smog.The spatial agglomeration characteristics of pollution were further analyzed.Then,using AQI as the explanatory variable,factors such as economic development level,population density,technological level,industrial structure,foreign direct investment,and energy consumption were analyzed to analyze the influencing factors of smog pollution in Beijing-Tianjin-Hebei.A spatial lag model and The spatial error model studies the different influences of different influencing factors on the haze pollution under the space spillover effect.The study found that the smog pollution in the Beijing-Tianjin-Hebei region has the same obvious seasonal effects as the country.In recent years,the smog pollution has shown a trend of winter> autumn> spring> summer.The cities with the most severe smog are Shijiazhuang,Baoding City,Xingtai City,Handan City and other southern cities,the lighter cities are mainly Zhangjiakou City,Chengde City,Qinhuangdao City.At the same time,the smog pollution in the Beijing-Tianjin-Hebei region showed obvious spatial correlation and spatial agglomeration characteristics in most years.The increase in the smog pollution concentration in Shijiazhuang can drive the increase in the smog pollution concentration in the surrounding areas.Zhangjiakou,Chengde,The three cities of Qinhuangdao City are the areas with low concentration of haze pollution and areas with low concentration.The population density,technological level,industrial structure,and energy consumption in the Beijing-Tianjin-Hebei region have a positive impact on smog pollution,while the level of economic development and foreign direct investment have a negative impact.The most important spatial regression coefficient is positive,indicating that There is a positive spatial correlation between smog pollution in Beijing,Tianjin and Hebei regions.Finally,this article summarizes the research conclusions and makes suggestions on how to reduce the smog pollution in the Beijing-Tianjin-Hebei area.It is proposed from different perspectives that the Beijing-Tianjin-Hebei urban agglomeration can continue to develop ecological economy anddrive economic growth with ecological development,promote the coordinated development of Beijing-Tianjin-Hebei,adjust and optimize the industrial structure,establish a joint prevention mechanism for air pollution,and construct an ecological compensation mechanism for the management of smog. |
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