GEOGRAPHICAL RESEARCH ›› 2008, Vol. 27 ›› Issue (2): 285-294.doi: 10.11821/yj2008020006

• Land Resource and Use • Previous Articles     Next Articles

On urbanization process and spatial expansion in the urban fringe of Beijing:A case study of Daxing District

WU Zheng-zheng1, SONG Jin-ping1, WANG Xiao-xia2, CHENG Yi1, ZHANG Ning1   

  1. 1. School of Geography, Beijing Normal University, Beijing 100875, China;
    2. school of public Administration,Renmin University.Beijing 1000872,China
  • Received:2007-08-21 Revised:2008-01-15 Online:2008-03-25 Published:2008-03-25
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The analysis on spatial expansion of the urban fringe lays the foundation for the research on urban spatial structure and formation evolution in the future. Based on the data of urban land use in Daxing District, extracted from TM remote sensing images in 1994, 2001 and 2006, this article conducts an analysis on the temporal and spatial characteristics of urban land use in the urbanization.process of the past ten years urbanization, through studying the intensity index, gradient index and spatial expansion pattern and other factors involved in the expansion of the built-up areas, and provides basis for identifying the orientation of urban land use in the urban fringe and improving the efficiency of land use and urban and rural construction. The result shows that urbanization of Daxing primarily concentrated on the later study period, with ever increasing in intensity of expansion of the urban land use; construcion lands are distributed in the gradient of urban expansion in an uneven manner, with two stable growth areas, generally in highly urbanized area and rural area whose gradient indexes are above 0.8 and below 0.2 respectively. The increasing expansion of the central urban district and its area has resulted in an evident trend that the built-up areas are concentrated on high index sect:ons, with large-scale increase in built-up areas in low index sections due to the rapid development of small towns in rural areas. The whole district was separated into three levels by the urbanization gradient, i.e., the high speed-urbanization belt, rapid-urbanization belt and slow-urbanization belt.The high-speed-urbanization belt, close to the central district, is in the dominant position, but is declining owing to the restriction of the land supply. Rapid-urbanization belt expands mainly along an axis which has exerted stable impact on the urbanization of Daxing. With the rapid development of urban economy,the separated pattern is becoming a main pattern of spatial expansion of the urban fringe, with an increasingly dramatic influence on the spatial expansion, leading to rapid increase of the number of constructed areas.

Key words: urbanization, builb-up area, urban fringe area, Daxing District