Measurement of neighborhood-scale population dynamic changes due to intracity migration and its spatial differentiation characteristics:Empirical evidence from Wuhan City based on mobile phone signaling data
Accurately grasping the patterns of population dynamics within cities can help promote coordinated regional development and optimize the spatial structure of society.Most of the existing studies focus on the total population and distribution changes at the macro scale,but lack of attention to the process of population dynamics caused by intracity relocation,and its measurement methods and characteristics are yet to be explored.Based on cell phone signaling big data and taking Wuhan City as an example,this study carried out an empirical analysis by constructing a three-dimensional indicator system of scale-direction-movement for population dynamics,applying cluster analysis to analyze the characteristics of population dynamics at the neighborhood scale caused by intracity relocation,and exploring the comprehensive characteristics of population dynamics changes and differentiation patterns.The results show that:1)Population dynamics from the central city to the suburban areas have the scale characteristics of highly active→moderately active→inactive,directional characteristics of roughly balanced in and out→seriously imbalanced,and dynamic/static characteristics of static-oriented→dynamic-oriented.2)There are five comprehensive types of population dynamics in the Wuhan metropolitan area,of which the highly active-growth-dynamic type and the highly active-loss-weak dynamic type are mainly interspersed in the core areas of the central urban area and the suburban area clusters;the moderately active-slight loss-weak dynamic type is mainly distributed in the periphery of the above two types;and the inactive-slight growth-strong dynamic type and the inactive-balance-dynamic type are distributed at the edge of the central urban area and the suburban area clusters.3)The comprehensive types of population dynamics within the Wuhan metropolitan area have a core-periphery nested structure:The spatial differentiation of population dynamics between the central urban area and the peri-urban areas is mainly related to location and the quality of the living environment;within the central urban area,the spatial differentiation of population dynamics between the central city and peri-urban areas is mainly related to location and the quality of the living environment;the spatial differentiation within the central city and peri-urban areas is mainly related to the development and type of industries.This study expanded the theory and methods of the study of population migration and population change,and provides a reference basis for optimizing the social and spatial structure of urban society,and for fine-tuning the policy of residential space supply.
population dynamic changethree-dimensional indicator systemspatial differentiationcell phone signaling dataintracity migrationWuhan
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