| 北京上海近20 a城市化过程中
土地利用变化异同点探析 |
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| 引用本文： | 缪丽娟,崔雪锋,栾一博,何斌.北京上海近20 a城市化过程中
土地利用变化异同点探析[J].气象科学,2011,31(4):398-404. |
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| 作者姓名： | 缪丽娟 崔雪锋 栾一博 何斌 |
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| 作者单位： | 北京师范大学全球变化与地球系统科学研究院地表过程与资源生态国家重点实验室,北京,100875 |
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| 基金项目： | 国家重点基础研究发展计划（973计划）资助项目（2010CB428502；2011CB952001）；新世纪优秀人才支持计划资助（NCET-09-0227）;中央高校基本科研业务费专项资金资助 |
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| 摘 要： | 城市化进程下土地利用格局变化以及驱动力分析是当前国内学者研究的热点。本文利用C5决策树分类方法分别提取北京、上海1990s以来的三期遥感影像分类图，揭示两市城市用地格局变化的空间规律及其异同点。结果表明：过去的20 a来北京地区以北京市辖区为中心呈现低密度式蔓延扩张；上海城市用地呈“单中心、多卫星城”同时扩张，并且东部沿江地区发展速度较快。将研究区按扩张程度分为：高度扩张区、中度扩张区、低度扩张区。从空间上看，上海城市用地扩张比北京明显，在扩张的过程中占用了大量耕地，上海地区尤为明显。同时，人口增长、产业结构调整等是城市化进程中土地利用变化的主要驱动力因子，需要将来更多的相关研究。
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| 关 键 词： | 城市化 C5决策树分类 土地利用变化 驱动力 |
| 收稿时间： | 2011/5/16 0:00:00 |
Similarities and differences of Beijing and Shanghai's land use changes induced by urbanization |
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| MIAO Lijuan,CUI Xuefeng,LUAN Yibo and HE Bin.Similarities and differences of Beijing and Shanghai''s land use changes induced by urbanization[J].Scientia Meteorologica Sinica,2011,31(4):398-404. |
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| Authors: | MIAO Lijuan CUI Xuefeng LUAN Yibo and HE Bin |
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| Institution: | State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875,China;State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875,China;State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875,China;State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875,China |
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| Abstract: | It is important to study land use change driven by urbanization. In this paper, we analyzed TM images since 1990 to reveal the spatial difference of land use changes in Beijing and Shanghai. The results showed that urban area sprawled out from central area with a low density in Beijing, while multi-satellite towns simultaneously developed together with city central area in Shanghai, particularly the eastern part along the river. If we classify the urban expansion into high sprawl, medium sprawl, and low sprawl, the high sprawl area is larger in Shanghai than that in Beijing. During urbanization, a lot of cropland is scarified to provide construction land. Population growth and economic structural changes are the major driving factors of land use changes in urbanization, which need further studies. |
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| Keywords: | Beijing Shanghai Urbanization C5 decision tree classifier Land use change Driving factor |
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