基于最低成本—周期模型的昆明市空间形态演变研究

在政治经济学背景下,由于政府力量和市场力量相互交融,城市形态演化遵循一定的周期性演变规律。基于1909~2008年间昆明市历史阶段的形态演化资料,运用参与式照片、R指数及高密度填充指数与低密度扩张指数分析了昆明市城市形态演化的周期性规律。结果表明,从理性的微观过程或个体行为及宏观过程或城市实践来看,城市形态演化包含了最低成本周期扩张模型,即低密度的扩张与高密度的填充;低密度的扩张由政府主导的基础设施建设投资所引导,而高密度的回填运动由集体与理性的个体企业所引发,故城市形态的宏观演化,是它本身的内在法则与外部机制的统一体。这一结果有助于解释更多有关土地使用及土地管理的信息,将帮助我们进行规划未来的城市发展。

THE MINIMUM COST-CYCLE GROWTH MODEL OF URBAN SPATIAL MORPHOLOGY: A CASE OF KUNMING IN CHINA

In the context of political economy, the forces from government and market are reciprocal, resulting in the periodic evolution of urban morphology. Based on historical phases of urban morphological evolution of the Kunming Metropolis from 1909 to 2008, we found that:(1) from the view of the rational micro-process or individual behavior and macro-process or urbanization practice, the evolution of urban morphology follows a Minimum Cost-Cyclic Growth model (MCCG), presenting a cycle of a dual phase of expansion, low density based expanding versus high density base infilling; (2) The MCCG model is periodically and reciprocally derived by a set of vis-à-vis dualistic dynamic, in which low density expansion pattern is led by state based pro-growth infrastructure investment, while the high density infilling movement is activated by collective and rational action of individual enterprise/economic behaviors.