多中心城市区域城市蔓延冷热点格局及演化——以苏锡常地区为例  

Evolution of Cold-Hot Spot Pattern of Polycentric Urban Areas Urban Sprawl——A Case Study of Suzhou-Wuxi-Changzhou Area

作　　者：王钊[1] 杨山[1] 

机构地区：[1]南京师范大学地理科学学院,中国江苏南京210023

出　　处：《经济地理》2015年第7期59-65,共7页Economic Geography

基　　金：国家自然科学基金项目(41171133;41471135);高等学校博士学科点专项科研基金(20123207110017)

摘　　要：在快速城市化过程中,城市经济快速发展,城市蔓延严重。多中心城市区域(PUR,Polycentric Urban Region)由于城市间相互影响、资源共享、共同竞争,城市蔓延表现出更为复杂的时空变化。文章以苏锡常地区为案例,利用1991—2013年间5个时相的遥感影像数据,借助蔓延特征指标、空间关联模型,对苏锡常地区进行全局和局部的蔓延热点分析,揭示PUR城市蔓延的空间演化规律。结果表明:PUR城市蔓延空间自相关性较强,次热区与热点区同步演化;冷热点切换频繁,热点区空间结构复杂,蔓延方式多样。具体表现为"圈层扩展"—"分散蔓延"—"多点连片"的格局转变过程,从1995年以前的向城市四周均衡扩展,转向1995—2008年期间蛙跃区与轴状扩展区双重作用下的分散—碎化蔓延,再到2008年以后蔓延热点向中心城市与次中心城市之间填充连片。PUR城市冷热点格局变化分析有助于深刻理解城市扩展的过程,可为控制城市蔓延提供决策依据。In the process of rapid urbanization, accompanied by the rapid economic growth, urban sprawl becoming more and more serious. Due to the impact of inter-city, resource sharing, common competition, The urban sprawl evolution of polycentric urban region （PUR, Polycentric Urban Region） exhibit more complex. In this paper, SXC region as a case study, with the help of remote sensing images from 1991 to 2013 among five phase and Spread Characteristic Index , global and local＇ s cold-hot spot spread area of SXC has been analysis. Finally revealing spatial evolution of PUR urban sprawl through spatial correlation model. The results showed that： PUR urban sprawl shows a strong trend of spatial natural correlation, hot spots and sub-hotspots synchronous evolution; cold-hot areas are changing frequently, The space structure of hotspot trends to be more complex. SXC cold-hot areas of the city spread pattern experienced a ＂Circle- extended＂-＂ Dispersed spread＂-＂Multi-contiguous＂ transformation process. Before 1995, all city balanced spread; Between 1995 to 2008, under the dual role of frog leap spread and axial expansion, Sprawl pattern turning to scatterfragmentation spread. To 2008, hot area filling spread between Center Cities. The analysis of cold-hot spot pattern of polycentric urban areas can help a deep understanding of the process of the study area＇s urban sprawl. It can provide basis for decision making to control urban sprawl.

关 键 词：多中心城市区域(PUR) 城市蔓延 冷热点格局 苏锡常地区 

分 类 号：F127[经济管理—世界经济]