中国地理科学 ›› 2016, Vol. 26 ›› Issue (2): 129-142.doi: 10.1007/s11769-016-0796-z

• 论文 •    下一篇

Extraction of Basic Trends of Urban Expansion in China over Past 40 Years from Satellite Images

WEN Qingke1, ZHANG Zengxiang1, SHI Lifeng1,2, ZHAO Xiaoli1, LIU Fang1, XU Jinyong1, YI Ling1, LIU Bin1, WANG Xiao1, ZUO Lijun1, HU Shunguang1, LI Na1,2, LI Minmin1,2   

  1. 1. Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2015-06-11 修回日期:2015-09-30 出版日期:2016-02-27 发布日期:2016-02-25
  • 通讯作者: SHI Lifeng E-mail:shilf@radi.ac.cn
  • 基金资助:

    Under the auspices of National Natural Science Foundation of China (No. 41201443, 41101148), Strategic Planning Program in the Thirteenth Five-Year Plan of Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences (No. Y4SG0100CX)

Extraction of Basic Trends of Urban Expansion in China over Past 40 Years from Satellite Images

WEN Qingke1, ZHANG Zengxiang1, SHI Lifeng1,2, ZHAO Xiaoli1, LIU Fang1, XU Jinyong1, YI Ling1, LIU Bin1, WANG Xiao1, ZUO Lijun1, HU Shunguang1, LI Na1,2, LI Minmin1,2   

  1. 1. Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2015-06-11 Revised:2015-09-30 Online:2016-02-27 Published:2016-02-25
  • Contact: SHI Lifeng E-mail:shilf@radi.ac.cn
  • Supported by:

    Under the auspices of National Natural Science Foundation of China (No. 41201443, 41101148), Strategic Planning Program in the Thirteenth Five-Year Plan of Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences (No. Y4SG0100CX)

摘要:

If urban sprawl is to be avoided in China in the next ten years, it is not only crucial to understand the overall history, current status, and future trends of urban expansion there, but also these differences, and this is presently lacking. In this study, remotely sensed images with approximately 30 m spatial resolution were used to quantitatively assess the spatial and temporal patterns of urban expansion of 60 Chinese cities (1973-2013). Urban-expansion-process curves of the cities studied were drawn using annual expansion area as an indicator. Curve similarity analysis generated four basic process modes of urban expansion in China. These included cities that: 1) peaked around 2004 and then decelerated; 2) peaked around 2010 and then decelerated; 3) showed sustained acceleration, and 4) showed continued deceleration. Four basic process modes represented cities under different levels of development stage. Geographic location was found to be the most related characteristic to urban expansion process. Regional development policies at the national level in each region also showed highly temporal consistency with fluctuation characteristics of urban expansion process. Urban characteristic such as population size and administrative level were not found to be significantly related to urban expansion-process modes. Understanding the basic process-mode categories well is extremely important for future regional-balance planning and development of macroeconomic policies.

关键词: urban expansion, urbanization, expansion-process mode, long term, urban development stage, curve similarity, urban characteristic

Abstract:

If urban sprawl is to be avoided in China in the next ten years, it is not only crucial to understand the overall history, current status, and future trends of urban expansion there, but also these differences, and this is presently lacking. In this study, remotely sensed images with approximately 30 m spatial resolution were used to quantitatively assess the spatial and temporal patterns of urban expansion of 60 Chinese cities (1973-2013). Urban-expansion-process curves of the cities studied were drawn using annual expansion area as an indicator. Curve similarity analysis generated four basic process modes of urban expansion in China. These included cities that: 1) peaked around 2004 and then decelerated; 2) peaked around 2010 and then decelerated; 3) showed sustained acceleration, and 4) showed continued deceleration. Four basic process modes represented cities under different levels of development stage. Geographic location was found to be the most related characteristic to urban expansion process. Regional development policies at the national level in each region also showed highly temporal consistency with fluctuation characteristics of urban expansion process. Urban characteristic such as population size and administrative level were not found to be significantly related to urban expansion-process modes. Understanding the basic process-mode categories well is extremely important for future regional-balance planning and development of macroeconomic policies.

Key words: urban expansion, urbanization, expansion-process mode, long term, urban development stage, curve similarity, urban characteristic