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-  2014 

城市扩张情景模拟及对城市形态与体系的影响——以广西西江经济带为例

DOI: 10.11821/dlyj201403010

Keywords: 城市扩张,生态重要性,开发建设适宜性,最小累积阻力模型,效应,广西西江经济带

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摘要: 针对区域层面城市扩张模拟研究的缺失,以快速城市化的广西西江经济带为案例区,构建了生态重要性和土地开发建设适宜性两种扩张情景;借助最小累积阻力模型对经济带内主要城市的扩张进行情景模拟,进而分析城市扩张对其形态和位序—规模特征的影响,揭示不同情境间的差异。结果表明,随着扩张强度增加,城市形态趋于紧凑和稳定,城市位序—规模发生变化。对比两种情景,生态重要性情境下,新增建设用地的分配相对均匀,首位城市发生变化,首位度明显下降,城市扩张方式多样,形态较为复杂、松散,内部各城市之间形状差异较大;土地开发建设适宜性情景下,大中城市扩张速度较快,首位城市保持不变,其首位度略有下降,城市扩张以外延式和填充式扩张为主,形态相对紧凑、规则,各城市间形状差异较小。研究认为基于生态重要性的城市扩张情景有利于减少重要生态空间占用、维护城市生态系统健康、合理调控城市体系结构,是一种更加可持续的扩张方式

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