| Urbanization is a complex process of population dynamic migration,social structure change and reconstruction of land spatial structure,and it is a major subject of great concern in academia.Promoting the process of urbanization and improving the quality of urbanization is not only the realistic requirement of building a well-off society in an all-round way,but also an effective way to achieve regional sustainable development.As the largest tributary of Guizhou Province and the South Bank of the upper reaches of the Yangtze River,the study of urbanization in the Wujiang River Basin of Guizhou Province is of great significance for narrowing the gap between regions and promoting the coordinated development of urbanization in Guizhou Province and even in China.This paper constructs a comprehensive index system of urbanization in Wujiang River Basin of Guizhou Province,calculates the comprehensive index of urbanization by using the method of entropy,analyses the spatial and temporal evolution characteristics of urbanization level with the help of Arcgis and GeoDA software,calculates the migration trend of urbanization center of gravity,and uses spatial autocorrelation to analyze the spatial differences among the counties in the basin,reveals the urbanization space in Wujiang River Basin of Guizhou Province.Finally,using SLM and geographic weighted regression analysis,the driving factors of urbanization development in Wujiang River Basin of Guizhou Province are discussed.The results show that:(1)By analyzing the spatial and temporal evolution characteristics of urbanization level in the Wujiang River Basin of Guizhou Province,we can see that the comprehensive index of population urbanization,Economic Urbanization and social urbanization shows an upward trend from 2000 to 2015,and each shows different stages of change.The comprehensive index of urbanization under the combined action of three systems shows an upward trend of growth in the basin.The subsystems of Guiyang City of Guizhou Province have the best development.The relatively backward subsystems are concentrated in Bijie,Zunyi and Tongren County cities in the basin.The urbanization subsystems of Wujiang County in Guizhou Province show a continuous development trend,which makes the comprehensive level of urbanization continuously improved.(2)Through the analysis of urbanization gravity center migration and spatial autocorrelation in Wujiang River Basin of Guizhou Province,we can see that the urbanization comprehensive horizontal gravity center moves from northeastern Xiuwen County of Guiyang City to southeastern Xifeng County,and the moving distance is relatively short in a continuous period of time,and the locus of urbanization gravity center appears local fluctuation and repeatability;Through the calculation and test of Moran's I index,Wu County of Guizhou Province The spatial autocorrelation of urbanization comprehensive level in the river basin is significant,the agglomeration distribution trend is increasing,and the orderliness of county urbanization development level in the river basin is gradually increasing,and the disorder is gradually weakening.The local autocorrelation analysis shows that there is a strong correlation between urbanization comprehensive level agglomeration in the Wujiang River basin of Guizhou Province,and the high-value area and the low-value area show the characteristics of agglomeration.The effects of radiation and radiation are significant.(3)The urbanization development of Wujiang River Basin in Guizhou Province is the result of the interaction of natural factors and human factors.Through the analysis of the influencing factors of urbanization of Wujiang River Basin in Guizhou Province by GWR model,the regression coefficient of natural factors shows that elevation,slope and fluctuation are negatively correlated with the urbanization development;the proportion of non-agricultural population,population density,per capita GDP and the added value of secondary industry account for the proportion of non-agricultural population.The proportion of GDP and the number of beds in medical and health institutions per 10,000 people are positively correlated with the development of urbanization,while the number of students in middle schools per 10,000 people has a negative effect on the development of urbanization in the Wujiang River Basin of Guizhou Province. |
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