| 群组型港口城市用地时空扩展特征及外部形态演变——以宁波为例 |
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| 引用本文： | 李加林,朱晓华,张殿发.群组型港口城市用地时空扩展特征及外部形态演变——以宁波为例[J].地理研究,2008,27(2):275-284. |
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| 作者姓名： | 李加林 朱晓华 张殿发 |
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| 作者单位： | 1. 宁波大学海岸带资源与环境研究中心,宁波,315211
2. 中国科学院地理科学与资源研究所,北京,100101 |
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| 基金项目： | 国家自然科学基金(40701006),宁波市自然科学基金(2006A610077),宁波大学重点学科课题(XK0611036) |
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| 摘 要： | 以多时相Landsat MSS、TM和ETM 卫星影像为数据源,提取宁波城市各组团(三江片、镇海片和北仑片) 多时相的用地信息,分析了港口城市用地扩展的时空特征及外部形态演变过程。结果表明: (1) 1979年以来,宁波城市用地面积扩展速度和扩展强度不断提高,但各个组团的表现有较大的差异。(2) 各组团城市用地空间结构分维数的波动与城市用地的空间扩展模式表现出明显的相关性。(3) 3个组团的城市用地扩展强度指数峰区相对城市质心有不断外移趋势,但扩展强度指数峰值的变化在各个片区有一定差异。(4) 3个组团城市用地外部形态演变在不同方向上的差异性与宁波港口迁移及港口经济的发展密切相关。(5) 随着宁波港口从内河港向河口港、海岸港的迁移,宁波城市外部形态演变经历块状单一集中型内河港城市、 "一城一镇"飞地式群组河口港城市、"一城二镇" 飞地式群组海港城市和"一城多镇"不连续带状群组海港城市发展阶段,最后将形成"T"型带状群组现代化国际港口城市。
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| 关 键 词： | 城市用地 时空特征 群组型港口城市 形态演变 宁波 |
| 文章编号： | 1000-0585(2008)02-0275-10 |
| 收稿时间： | 2007-10-13 |
| 修稿时间： | 2007年10月13 |
Spatio-temporal characteristics of urbanized area growth and outer spatial form evolution of group port city: Taking Ningbo city as a case |
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| LI Jia-lin,ZHU Xiao-hua,ZHANG Dian-fa.Spatio-temporal characteristics of urbanized area growth and outer spatial form evolution of group port city: Taking Ningbo city as a case[J].Geographical Research,2008,27(2):275-284. |
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| Authors: | LI Jia-lin ZHU Xiao-hua ZHANG Dian-fa |
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| Institution: | 1. Coastal Resources and Environment Research Center, Ningbo University, Ningbo 315211 China;
2. Institute of Geographic Sciences and Natural Resources Research, CAS,Beijing 100101,China |
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| Abstract: | Ningbo,classic group city,is the central city of the south Yangtze River Delta and is one of the economically developed coastal areas.Since the late 1970s,its urbanization process has been quickened greatly,which resulted in substantial increase in both urban areas and urbanization intensity.The landsat MSS,TM/ETM satellite images,which were respectively acquired in five periods of 1979,1990,1995,2000 and 2005,were used to extract urban land information and analyze urban growth data with the help of remote sensing and GIS software.We analyzed the spatio-temporal characteristics including urban growth speed,growth intensity and fractal dimension.Additionally,outer spatial form of urban expansion in Ningbo city was also analyzed.The results are as follows.(1) From 1979 to 2005,the growth speed and the growth intensities of urbanized area in Ningbo city were accelerating obviously.To the three districts,there are some differences in the growth speeds and intensities.(2) The fractal dimensions of urbanized land structure were fluctuant and relating to the growth process of urbanized land.When the shape of urbanized land tends to be regular,the fractal dimension will decrease.(3) The mode position of index of the growth intensities related to shape centre of the urbanized land tends moving toward the outside.But the change of the mode value differs from each other in the three districts.(4) The direction of spatial expansion of urbanized land was obviously related to transplanting of port and the development of port economy.(5) With the transplanting of Ningbo port from river port,estuary port to coastal port,the evolvement of outer spatial form of Ningbo city was from the type of single central city with river port,enclave group city of estuary port with "one city and one town",enclave group city of coastal port with "one city and two towns" and discontinuity zonal city of coastal port with "one city and many towns".Finally,the "T-shaped" outer spatial form of modern Ningbo city composed of towns along the coast and towns along the Yong jiang River will come into being. |
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| Keywords: | urbanized land spatio-temporal characteristic group port city spatial form evolution Ningbo |
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