Analysis on the characteristics and influencing factors of urban land use expansion in Nanjing metropolitan area

doi:10.14088/j.cnki.issn0439-8114.2024.02.018

Abstract

Abstract: Taking Nanjing metropolitan area as the research object, based on the land use data extracted from the 5 remote sensing images from 2000 to 2020, the temporal and spatial characteristics and influencing factors of urban land use expansion in the urban agglomeration of Nanjing metropolitan area were quantitatively analyzed from the expansion intensity, difference index of expansion intensity, cluster analysis, landscape pattern index and multiple regression model. The results showed that based on the analysis of the expansion intensity index, the urban land area of Nanjing metropolitan area continued to increase from 2000 to 2020, and the expansion intensity showed a trend of “rising-falling-rising”, and the expansion intensity of urban land was the highest from 2015 to 2020. Based on the analysis of the difference index of urban land expansion intensity, the high-speed expansion area of Nanjing metropolitan area was concentrated in the border areas of the metropolitan area, mainly distributed in the northeast and southwest directions, and the urban land expansion layout was developing towards a balanced development. Based on the analysis of the cluster analysis model, it was found that the urban land use expansion in Nanjing metropolitan area was randomly distributed from 2000 to 2010, the urban land use expansion was concentrated at high values from 2010 to 2015, and the land use expansion was randomly distributed from 2015 to 2020. Based on the analysis of the landscape pattern index, it was found that the degree of urban land expansion agglomeration in Nanjing metropolitan area gradually increased, the distribution of patches became more and more concentrated, the shape of patches tended to be complicated in the continuous integration and expansion, the traffic connection degree in urban land patches continued to increase, and the expansion of urban land in Nanjing metropolitan area developed towards synergy. Based on the analysis of the multiple regression model, population growth, urban economic development and transportation construction were the main factors promoting the expansion of urban land.

Key words: urban land use, land use expansion, driving force factor, Nanjing metropolitan area

CLC Number:

F293.2

XIONG Yuan-yuan, LI Yi. Analysis on the characteristics and influencing factors of urban land use expansion in Nanjing metropolitan area[J]. HUBEI AGRICULTURAL SCIENCES, 2024, 63(2): 101-110.

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