长江流域资源与环境 >> 2018, Vol. 27 >> Issue (09): 1928-1936.doi: 10.11870/cjlyzyyhj201809004

• 区域可持续发展 • 上一篇    下一篇

1980年以来南京市建设用地扩张阶段性特征

冀青青 1,2,乔伟峰1,2*,卢  诚1,2,王亚华1,2   

  1. (1.南京师范大学地理科学学院, 江苏 南京 210023;2.江苏省地理信息资源开发与利用协同创新中心,江苏 南京 210023)
  • 出版日期:2018-09-20 发布日期:2018-11-01

Stage Characteristics of Construction Land Expansion in Nanjing Since 1980

JI Qing-qing, QIAO Wei-feng, LU Cheng, WANG Ya-hua   

  1. (1.College of Geographical Science,Nanjing Normal University,Nanjing 210023,China;2.Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application,Nanjing 210023,China)
  • Online:2018-09-20 Published:2018-11-01

摘要:  以快速城市化地区南京市为例,基于1980~2016年7期遥感影像分类结果,采用规则格网法、等扇分析法和公共边测度法等空间分析方法,分阶段分析36a间城市建设用地扩张强度、方向和模式等特征。结果表明:36a间南京城市建设用地增长迅速,达574.73 km2;在不同时期和不同方向上,南京城市空间扩张强度和扩张模式有很大差异, 36a间南、东北方向扩张强度最大;扩张最快的阶段是2004~2008年,年均扩张55.28 km2;填充式扩张主要发生在主城区内部和已有一定发展基础的地区,蔓延式扩张除围绕主城区向外扩张外,还包括上一阶段飞地式扩张地区的持续发展,飞地式扩张则比较分散,多受开发区、大学城等选址的影响;南京城市建设用地扩张经历了低速扩张-加速扩张—高速扩张—变化趋缓的过程。

Abstract: Based on multi-temporal remote sensing images from 1980 to 2016, we extracted land use information in Nanjing with the hierarchical land use information extraction method based on knowledge and rule. The grid method, equal fan analysis method and shared boundary analysis method were used to analyze the intensity, direction and types of the long cycled and multi-period urban construction land expansion. The result revealed that the rate of urban expansion in Nanjing was very quick and the urban construction land area has increased 574.73 km2 during the last 36 years. The construction land expansion has obvious characteristics-expanding along the Yangtze River and transportation-oriented development. The rising of development zones and university town is the main reason for construction land expansion in Nanjing. In different periods and directions, the intensity and types of urban spatial expansion are quite different. 2008-2012 is the fastest period of urban expansion, with an average annual growth of 55.28 km2. The intensity of expansion in the south and northeast were the highest, urban expansion has changed from single center to multi center pattern. The infilling expansion mainly occurred within the main city and some areas with certain development foundation; The spread expansion was not only from main city to surrounding areas, but also included the expansion of areas which used to be enclaves; The enclave expansion was more dispersed and affected by the location of the development zone and the university town. The study also showed that the expansion of urban construction land in Nanjing has experienced the process of low speed expansion, accelerated expansion, high speed expansion and slow change. Expansion of urban construction land in Nanjing has been transformed from extensive to connotative, and more attention was paid to the adjustment and integration of internal space structure. Urban development in Nanjing should shift from flat expansion to vertical expansion, fully develop and utilize the aboveground and underground space, accelerate the integration of the urban internal space structure.

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