| Air is one of the most basic environmental factors for human survival.With the continuous development of human society and the gradual acceleration of the process of industrialization,the economy and society show a rapid growth,and air pollution has become one of the global public hazards.The Pearl River-West River economic belt,as an important economic supporting belt related to the coordinated development of South China,is accompanied by the problem of air pollution while achieving rapid,stable and sustainable development.According to the relevant data,many factors,such as environmental factors and human factors,affect the urban air quality of the Pearl RiverWest River economic belt.Therefore,it is necessary to analyze the temporal and spatial variation characteristics and influencing factors of urban air quality in the Pearl RiverWest River economic belt,which can not only understand the current situation,change process and development trend of air quality in the economic belt,but also provide suggestions for relevant environmental protection departments to formulate prevention and control policies according to the analysis results.The index to measure air quality is the comprehensive index of air quality.At present,the air quality composite index of 11 cities in the Pearl River-West River economic belt is presented to the public with real data.This paper selects the monthly data of the air quality composite index of 11 cities in the Pearl River-West River economic belt from 2017 to 2019 as the original data,and uses Geo Da and Stata to make statistical analysis on the spatiotemporal variation characteristics and influencing factors of the air quality of the whole economic belt and its 11 cities,here are the analysis results:(1)The urban air quality in the Pearl River-West River economic belt fluctuates greatly with seasons.The seasonal variation of air quality is better in summer than in winter.(2)The urban air quality in the Pearl River-West River economic belt is gradually becoming better from east to west.The air quality is the worst in the East,poor in the middle and the best in the West.(3)The spatial positive correlation of air quality composite index in the Pearl River-West River economic belt is significant.Through the spatial autocorrelation analysis,it is found that the comprehensive air quality index of the Pearl River-West River economic belt in recent three years(except the spring of 2018)shows a significant spatial positive correlation.(4)The air quality of every cities in the Pearl River-West River economic belt is closely related to the surrounding cities.Through the local spatial autocorrelation analysis,it is found that there are cities in the four seasons in the past three years,which are significantly correlated with the surrounding cities.the main performance is high(H-H)spatial agglomeration structures in the eastern region and the low(L-L)spatial agglomeration structures in the western region.(5)Most explanatory variables of urban air quality in the Pearl River-West River economic belt are human factors.(6)The variable of the permanent population at the end of the year has a significant influence on the air quality comprehensive index in the model.The data model and panel data model of the last three years are summarized.From the results of the model,the paper explains that the variable of the permanent population at the end of the year in the cross-section data model and panel data model have a significant impact on the comprehensive index of urban air quality.Finally,according to the results of the above statistical analysis,some suggestions are put forward to improve the urban air quality of the Pearl River-West River economic belt. |
PDF Full Text Request