摘要
城市空间破碎化影响城市整体功能和品质提升,探析城市空间破碎化空间分异机理有助于深化对城市空间结构理论的认识。以长沙市为研究对象,基于1 km×1 km格网测度空间破碎化的空间分异,结合有序多分类Logistic回归模型,识别影响城市空间破碎化的主导因素,揭示城市空间破碎化空间分异机理。结果表明:①长沙市城市空间破碎化空间差异显著,高破碎化区域呈分散点状集聚。②长沙城市空间破碎化类型可划分为居住破碎型、工业破碎型、生态破碎型、特殊破碎型等类型,其中生态破碎型及居住破碎型占比较高,不同破碎化类型空间分布差异明显。③地形位指数、开发程度、2009—2016年建设变化程度、地价、规划政策五个因素是城市空间破碎化分异的主导因素。形态、联系与功能三个维度的破碎化指数受各因素影响程度存在差异。④城市空间破碎化水平的升高主要源于三个方面:一是地形地貌对城市空间分割作用的大小,二是建设主体行为的失序程度,三是局部地区的规划失控与规划缺陷影响。基础动力(自然环境的先天分异)、直接动力(空间建设主体内在特性选择)和外在推动力(规划政策引导差异)三种作用力相互作用,共同推动城市空间破碎化分异格局的变化。
The fragmentation of urban space affects the overall function and quality of the city.Analyzing the spatial differentiation mechanism of fragmentation of urban space helps to deepen the understanding of urban spatial structure theory.Taking Changsha as the research object,the spatial differentiation of spatial fragmentation is measured based on the 1 km×1 km grid.Combined with the ordered multi-purpose logistic regression model,the dominant factors affecting spatial fragmentation are identified,and the spatial differentiation mechanism of spatial fragmentation is revealed.The results show that:1)The spatial difference of spatial fragmentation in Changsha is significant,and the areas with higher fragmentation are distributed in scattered points.2)The types of spatial fragmentation in Changsha can be divided into residential,industrial,ecological,and special types.Among them,ecological fragmented type and residential fragmented type account for a relatively high proportion,and the spatial distribution of different fragmented types is obviously different.3)The five factors of topography index,development degree,2009-2016 construction change degree,land price,and planning policy are the dominant factors for the fragmentation and differentiation of urban space.The fragmentation index of the three dimensions of form,connection and function is affected by various factors.4)The increase of the level of spatial fragmentation mainly stems from three aspects:One is the effect of topography and topography on the division of urban space,the second is the degree of disorder of the main behavior of the construction,and the third is the impact of out-of-control planning and planning defects in local areas.The interaction of basic forces(inherent differentiation of the natural environment),direct forces(selection of the internal characteristics of the main body of space construction)and external driving forces(differences in planning policies)jointly promotes the change of the fragmentation pattern of urban space.
作者
朱佩娟
张美芳
贺清云
郎泽慧
吴国权
ZHU Peijuan;ZHANG Meifang;HE Qingyun;LANG Zehui;WU Guoquan(College of Resources and Environment Sciences,Hunan Normal University,Changsha 410081,Hunan,China;Key Laboratory of Geospatial Big Data Mining and Application,Hunan Province,Hunan Normal University,Changsha 410081,Hunan,China)
出处
《经济地理》
CSSCI
CSCD
北大核心
2020年第6期116-125,共10页
Economic Geography
基金
湖南省重点领域研发计划项目(2019SK2101)。
关键词
城市空间破碎化
空间分异
分异机理
地形地貌
地价
规划政策
spatial fragmentation
spatial differentiation
differentiation mechanism
topography
land price
planning policy
