Ziyuan Kexue (Apr 2023)
Spatial pattern and mechanism of population density change in the built-up areas of the Beijing-Tianjin-Hebei region
Abstract
[Objective] The objective of this study was to scientifically examine the coupling rule, spatial characteristics, and formation mechanism of population and built-up area changes under the differential population flow in county units, and improve the multi-scale and multi-level allocation mechanism for the intensive use of land resources. [Methods] Taking the urban agglomeration of the Beijing-Tianjin-Hebei region as the study area and using GIS spatial analysis and econometric models, this study explored the pattern, coupling relationship, and driving mechanism of population density change in the built-up areas at the county level. [Results] The study found that: (1) From 2009 to 2018, population of 61% of the areas in the Beijing-Tianjin-Hebei region decreased. The population growth was concentrated in peripheral districts of Beijing and Tianjin and municipal districts of Hebei Province. Meanwhile, the corridor between Beijing and Tianjin and the central urban areas of prefecture-level cities in Hebei were the high-growth areas of the built-up areas in the region, and the growth rate of the built-up areas of both Beijing and Tianjin slowed down significantly. (2) Population density in the built-up areas of the Beijing-Tianjin-Hebei region declined by 323 people per square kilometer, and substantial decline areas were concentrated in counties in Hebei Province. The coupling relationship between population and built-up area changes was dominated by the pattern of “shrinkage and extensive” type from 2009 to 2018, which increased pressure on land resource allocation. (3) Population flow and industrial development model significantly influenced population density change in the built-up areas, but the increase of urbanization rate did not exhibit a significant effect on land use efficiency. [Conclusion] The relationship change between the populations and built-up areas of county-level units in the Beijing-Tianjin-Hebei region is significantly different, and the pressure of intensive use of the built-up areas in counties surrounding central cities, especially located in the central and southern plain farming areas of Hebei Province is increasing. Therefore, it’s urgent to innovate the multi-scale coordination mechanism of provinces, prefectural cities and counties, and optimize the multi-level policy system for reusing idle land in urban-rural areas.
Keywords
