地理科学进展 ›› 2010, Vol. 29 ›› Issue (11): 1433-1441.doi: 10.11820/dlkxjz.2010.11.042

• 自然区划与土地利用 • 上一篇    下一篇

地理区位因子对建设用地扩展的影响分析——以珠江三角洲为例

叶玉瑶, 张虹鸥, 刘凯, 吴旗韬   

  1. 广州地理研究所, 广州510070
  • 收稿日期:2010-01-01 修回日期:2010-07-01 出版日期:2010-11-25 发布日期:2010-11-25
  • 作者简介:叶玉瑶(1980-)|女|汉族|四川乐山人。博士|助理研究员|主要研究方向为区域发展与城市规划。
  • 基金资助:

    国家科技支撑计划项目(2006BAJ05A10);国家自然科学基金项目(41001385);广东省自然科学基金项目(10451007003005043);广东省科学院院长基金项目。

Impact of Site Factors on Expansion of Construction Land: A Case Study in the Pearl River Delta

YE Yuyao, ZHANG Hongou, LIU Kai, WU Qitao   

  1. Guangzhou Institute of Geography, Guangzhou 510070, China
  • Received:2010-01-01 Revised:2010-07-01 Online:2010-11-25 Published:2010-11-25

摘要:

以珠江三角洲地区为研究对象,利用1988、1998、2006 年3 个时相的建设用地解译数据,运用GIS 空间分析手段,定量分析了地理区位因子对建设用地扩展的影响。结果表明,地理区位因子,包括离城市中心距离、离干线公路距离、离海岸线距离以及地形等因素会对建设用地扩展的方向、规模、强度等产生重要影响。地理区位因子对建设用地扩展具有明显的空间指向作用,受中心城市集聚与扩散作用以及交通可达性的影响,建设用地扩展围绕城市中心呈现距离递变规律,并向郊区、临路、临海以及平原区等优势区位集聚,从而使建设用地扩展表现出明显的空间指向性,即郊区指向、道路指向、海洋指向和平原区指向。

关键词: 地理区位因子, 建设用地扩展, 珠江三角洲

Abstract:

In this study, we use three scenes of Landsat Thematic Mapper (TM) images, including those of 1988, 1998 and 2006, to detect the expansion of construction land in the Pearl River Delta. And then we use the spatial analysis function of GIS to specify the impact of site factors on it, focusing on the effect of the landform and the distance from the city center, roads or coastlines. Firstly, we derived land cover maps from TM data by artificial visual interpretation method (AVIM). Then, we overlaid the distribution maps of construction land with the topographic map and analyzed the pattern of construction land expansion in the buffer zones around urban centers or along main roads and coastline. The results show that the site factors, such as the landform and the distance from the city center, roads or coastline, indeed have a prominent influence on the expansion of the construction land. Due to the centralization and diffusion of the city center, the expansion of construction land reaches its peaks at two spheres surrounding the city center. The inner one represents the development of suburbs, indicating the spilling over of the city center and the rapid development of the suburbs, while the outer one manifests the development of the industrial zones and the construction of the satellite cities in the outer suburbs, showing the pattern of urban expansion like leapfrog. Thus, suburb is the preferred location for construction land development and the construction land there expands most furiously, indicating the intense interaction between urban and rural areas and also reflecting the essence of the process of suburbanization in large cities. The influence of the distance from the roads or coastline reflects, in essence, the impact of the transportation accessibility on the expansion of construction land. From the quantitative analysis results, we can see the location close to roads or shoreline is the preferred location for construction land development, resulting in the distribution pattern of the construction land gathering along the roads or coastline. Landform also has an obvious influence on the expansion of construction land. Plain area is the preferred location for construction land development, and also the area for the high-quality farmland to agglomerate, therefore triggering the conflicts between the construction land developmet and farmland protection. In short, site factors act as the indicators for the expansion of construction land, leading it to expand to the location such as suburbs, plains as well as the areas nearby the roads or coastline. Site factors play an important role in indicating or restraining the expansion of construction land, determining the direction, scale, intensity and speed of the expansion of construction land.

Key words: construction land, site factors, The Pearl River Delta