Quantifying Circular Urban Expansion Patterns of Compact Chinese Cities: The Case of Yangtze River Delta, China
Quantifying Circular Urban Expansion Patterns of Compact Chinese Cities: The Case of Yangtze River Delta, China
复制标题
量化中国紧凑城市的循环城市扩张模式:以中国长江三角洲为例
DOI:
10.1068/b120004p
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发表时间:
2015-04
期刊:
影响因子:
--
通讯作者:
Dene Liu
中科院分区:
文献类型:
--
作者:
S S Chen;Yue Yan;Qun Gao;Dene Liu
Accelerating urbanization all over the world has renewed interdisciplinary interest and public concerns over sustainable urban forms. Despite abundant literature on the concentric model and its application to urban land-use patterns, a rigorous and straightforward methodology to characterize the model quantitatively in space is especially needed. In this paper we present a diagramatic method and refine five indicators to measure and clarify the circular pattern of urban expansion. With remote sensing data, the approach has been examined for the sample set of fifty-one cities in the Yangtze River Delta (YRD) region of China. The five indicators adopted illustrated that most of YRD cities display a compact centralized form with a relatively small matured core area and are undergoing fast expansion. Furthermore, we have found distinctive local models of density gradient in built-up areas, shaped by urban population size and local institutional structures. The preliminary results related to the methodology are inspiring, which should be useful for elucidating urban growth trends and for decision making.
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