Research on Spatiotemporal Expansion of Urban Land of Tianjin City

HE Dan; CAI Jian-ming; ZHOU Jing

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Research on Spatiotemporal Expansion of Urban Land of Tianjin City

- Research on Spatiotemporal Expansion of Urban Land of Tianjin City
- Bulletin of Soiland Water Conservation Vol. 28, Issue 3, Pages: 56-60(2009)
- 作者机构：
  
  1. 中国科学院遥感应用研究所遥感科学国家重点实验室,北京,100101
  3. 中国科学院地理科学与资源研究所,北京,100101
  4. 中国林业科学研究院林业研究所,北京,100091
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2009
- 稿件说明：
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HE Dan, CAI Jian-ming, ZHOU Jing. Research on Spatiotemporal Expansion of Urban Land of Tianjin City[J]. Bulletin of Soiland Water Conservation, 2009, 28(3): 56-60.
DOI：

HE Dan, CAI Jian-ming, ZHOU Jing. Research on Spatiotemporal Expansion of Urban Land of Tianjin City[J]. Bulletin of Soiland Water Conservation, 2009, 28(3): 56-60. DOI：

摘要

利用中国科学院资源与环境数据中心提供的关于天津市20世纪80年代中期，90年代中期，2000年度3期1∶10万土地利用数据，以GIS为制图和数据提取的分析手段，通过引入城市扩展速度、强度、重心坐标、紧凑度、分维数、弹性系数等指标，研究了天津城市扩展的时空规律，形态特征，与人口、经济发展之间的协调关系以及对周边土地利用的影响。结果表明，天津城市用地扩展的时空分异特征明显，城市核心区扩展依然以西北—东南走向为主要轴向，北运河—海河轴向扩展一直是城市扩展的主轴。改革开放后滨海轴扩展速度也在加快。城市扩展过程中紧凑度数值先降低后稍有增加，空间形态由向着趋于不稳定状态发展而趋向稳定。城市扩展先是远慢于城市人口的增长，后来则大大快于城市人口的增长，出现了城市增长速度与人口增长速度之间不协调现象。面积—GDP弹性系数有上升的趋势，此时段经济的年均变化率远远超过了城市扩展的年均变化率。城市建成区面积的扩展对耕地的影响最大，其次是林地、草地、水域及未利用地等其它土地。

Abstract

By using the 1∶100 000 landuse vector data in the three periods of the middle 1980s

1990s

and 2000 which are provided by Data Center for Resources and Environmental Sciences

Chinese Academy of Sciences

and by taking GIS as charting and analysis method

the relationship between the space and time changes

the shape characteristics of urban land expansion

and the pop ulation and economics development in Tianjin City were analyzed

Such indexes as urban land expansion velocity and intensity

centre coordinates

compact ratio

fractal dimension

and elasticity coefficient were used in the analysis.It was revealed that the spatiotemporal variation of Tianjin urban land from middle 1980s to 2000 was obvious and that the Tianjin northwest southeast axial and the coastal axial were the mostactive expansion parts.The construction land expansion has been transforming to the irrational direction.The area—GDP elasticit y coefficient was raised and the annually averaged change ratio of economy exceeded far from that of urban expansion.Finally

the brief effect of urban expansio n was the lost of cultivated land and other land resources around the city.The contributio nof cultivated land to the overall urban expansion area was largest and the contribution of other lands such as forest land

grassland

water area

and not using land was second.

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