[1]ZHONG Yang,LIN Aiwen.Spatial Pattern Evolution and Optimization of Urban Agglomerations in the Middle Reaches of the Yangtze River-A Method Based on DMSP/OLS Night Light Data[J].Research of Soil and Water Conservation,2018,25(06):298-305.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 06
Page number:
298-305
Column:
Public date:
2018-10-26
- Title:
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Spatial Pattern Evolution and Optimization of Urban Agglomerations in the Middle Reaches of the Yangtze River-A Method Based on DMSP/OLS Night Light Data
- Author(s):
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ZHONG Yang1,2, LIN Aiwen1,2
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1. School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China;
2. Key Laboratory of Geographic Information System, Wuhan 430079, China
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- Keywords:
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night light data; urban agglomeration in the middle reaches of Yangtze River; comparative method based on auxiliary data; spatial pattern
- CLC:
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F291;P237
- DOI:
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- Abstract:
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The Landsat satellite image data and cluster analysis methods were used to correct the nighttime lighting data, and then the threshold value of the urban built-up area was determined using the comparison method based on auxiliary data. The total landscape area and patch were selected. A total of 8 typical landscape pattern indicators, such as density and landscape shape index, were used to calculate 8 landscape pattern indicators reflecting the spatial evolution of urban development in the middle reaches of the Yangtze River during 1992-2013 using the landscape pattern analysis software FRAG-STATS 4.2. The calculation results show that from 1992 to 2013, the urbanization of the urban clusters in the middle reaches of the Yangtze River rapidly expanded, the area of urban built-up areas increased by 7.02 times, the number of patches increased by 2.35 times, and the increase in patch density was also obvious. The complexity of shape gradually increased, and small and medium-sized cities continued to grow. At the same time, there were also a number of emerging small towns. Specifically, the average annual growth rate of the total boundary length and average boundary density were 18.86% and 18.87%, respectively. The largest patch index and the aggregation index presented the decline year by year, but overall the landscape area, the largest plate index, and the average boundary density all showed the characteristics of some fluctuations and disorder.