PROGRESS IN GEOGRAPHY ›› 2022, Vol. 41 ›› Issue (3): 385-395.doi: 10.18306/dlkxjz.2022.03.003

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Spatial and temporal differences of urban land expansion pattern and utilization intensity in Zhengzhou City

WANG Song1,2(), GUO Weihong3, SHEN Lei2,*(), HUANG Junchang3   

  1. 1. Hebi Polytechnic, Hebi 458000, Henan, China
    2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
    3. College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
  • Received:2021-04-21 Revised:2021-09-14 Online:2022-03-28 Published:2022-05-28
  • Contact: SHEN Lei E-mail:zaijianni@126.com;shenl@igsnrr.ac.cn
  • Supported by:
    Strategic Priority Research Program of the Chinese Academy of Sciences, No(XDA19040102);National Natural Science Foundation of China, No(41771566);The Project of Young Backbone Teachers Program in Henan Province, No(2019GGJS048)

Abstract:

Urban expansion is mainly reflected in the evolution of urban two-dimensional plane morphology and the expansion of three-dimensional urban space. This study was based on the spatial and temporal data of Zhengzhou urban residential quarters obtained by Internet crawler technology. Ellipse of standard deviation, kernal density analysis, and local indicators of spatial autocorrelation were used to analyze the temporal and spatial characteristics and agglomeration changes of residential districts in Zhengzhou City. The results show that: 1) With the change of dominant factors, the increase of residential area in Zhengzhou City in 1985-2019 was obvious, but it showed a downward trend after 2017; the floor area ratio of residential areas in the city has gradually changed from a slow growth trend to a rapid growth trend. 2) In 1985-2019, the gravity of residential quarter center in the city was mainly distributed at the junction of the five districts, affected by the migration of the total resident population, moving from the southwest to the northeast; affected by the N-shaped moving trend of the gravity of economic center, the east-west migration speed was greater than the north-south migration speed. 3) With the rapid increase of the number of residential quarters, the spatial spillover effect of urban residential quarters was significant, from dispersion to agglomeration, and the high degree of spatial differentiation changed from local to regional balanced. 4) There was an obvious spatial autocorrelation of the floor area ratio of the residential quarters at the residential community scale. The ecological conservation areas and the urban planning restricted development areas are the floor area ratio high-high agglomeration area, and the commercial agglomeration areas are the floor area ratio low-low agglomeration area.

Key words: urban expansion, residential land, big data, utilization intensity, Zhengzhou City