[1]Ding Xue,Shao Xin,Deng Ruifang,et al.Spatiotemporal Dynamics and Driving Forces of Impervious Surfaces in the Central Yunnan Urban Agglomeration from 2000 to 2020[J].Research of Soil and Water Conservation,2024,31(04):364-373.[doi:10.13869/j.cnki.rswc.2024.04.003]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 04
Page number:
364-373
Column:
Public date:
2024-06-30
- Title:
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Spatiotemporal Dynamics and Driving Forces of Impervious Surfaces in the Central Yunnan Urban Agglomeration from 2000 to 2020
- Author(s):
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Ding Xue1,2,3, Shao Xin1,2,3, Deng Ruifang2,3,4, Peng Shuangyun1,2,3, Wang Jinliang1,2,3
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(1.Faculty of Geography, Yunnan Normal University, Kunming 650500, China; 2.Key Laboratory of Resources and Environmental Remote Sensing for Universities in Yunnan, Kunming 650500, China; 3.Center for Geospatial Information Engineering and Technology of Yunnan Province, Kunming 650500, China; 4.School of Information Science and Technology, Yunnan Normal University, Kunming 650500, China)
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- Keywords:
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impervious surfaces; central Yunnan urban agglomeration; spatiotemporal evolution; driving force analysis
- CLC:
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TP79
- DOI:
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10.13869/j.cnki.rswc.2024.04.003
- Abstract:
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[Objective]This study aims to analyze the spatiotemporal dynamic evolution characteristics and driving mechanisms of impervious surfaces in the central Yunnan urban agglomeration, and to provide a theoretical basis for related research and assisting government and relevant departments in formulating urban agglomeration planning and development strategies. [Methods]GISD 30-meter impervious surface data from the central Yunnan urban agglomeration for the years 2000 to 2020 were utilized. Spatial analysis methods such as dynamic degree, standard deviation ellipse, quadrant analysis, and geographical detector were employed to reveal the spatiotemporal patterns of impervious surface changes and their driving mechanisms. [Results](1)With respect to temporal scale evolution, over the past two decades, the overall expansion rate of impervious surfaces in the central Yunnan urban agglomeration exhibited a fluctuating trend characterized by decline-rise-decline, with an annual average expansion rate of 66.77 km2. The annual average dynamic degree reached to 4.36%, indicating a continuous decline in the dynamism of impervious surfaces. The impervious surface area in the urban agglomeration expanded by 1 402.2 km2 during this period, with a growth rate of 91.5%.(2)With respect to spatial scale evolution, the expansion of impervious surfaces within various cities of the central Yunnan urban agglomeration over the last two decades displayed significant spatial disparities. For instance, Kunming witnessed substantial expansion of impervious surfaces, while Chuxiong Prefecture exhibited comparatively minimal expansion. On the whole, the urban agglomeration expanded towards the southern and southeastern directions, with the migration center remaining relatively stable.(3)With respect to directionality, the expansion of impervious surfaces in the central Yunnan urban agglomeration over the past 20 years showed a clear directional trend, primarily expanding in the northeast to southwest direction. The largest standard deviation ellipse area in year 2005 was marked, signifying the onset of rapid impervious surface expansion. Over the 20-year period, the center of impervious surface expansion remained relatively stable, consistently shifting southward with relatively minor overall changes.(4)Analysis of driving mechanisms indicated that population factors had a significant impact on impervious surface expansion, whereas factors such as LAI, slope, precipitation, temperature, and NDVI had less significant effects. The interaction strength between population and other factors was notably stronger than that between other factors. [Conclusion]Over the past two decades, impervious surfaces in the central Yunnan urban agglomeration had continued to expand, exerting a significant influence on the resource and environmental carrying capacity of the urban agglomeration and the spatial land use pattern. To support the high-quality leapfrog development of the central Yunnan urban agglomeration, an emphasis on optimizing the spatial layout of impervious surfaces is crucial.