四川省城市群空间结构演变特征及机制

Characteristics of Spatial Structure Evolution and Mechanism of Urban Agglomeration in Sichuan Province

基于四川省2000—2015年相关统计数据,运用统计分析与GIS分析方法,从人口空间结构、城市规模分布、交通网络结构、经济空间结构四个方面分析四川省城市群空间结构演变特征.结果表明:以交通网络为基础的城市群网络结构基本形成,城市群等级规模结构较完善,但城市首位度过大,中小城市发育较好,大城市发展相对较慢;城市群发展经历了较长时间的空间极化过程,逐渐向分散、均衡发展过渡;城市群空间结构及其演变过程主要受自然条件、人口因素、交通网络、经济发展基础和政策规划因素影响.

Based on the relevant statistics of 2000-2015,and by use of the methods of statistic and GIS analysis,an exploration was made into the spatial structural evolution characteristics of the urban agglomerations in Sichuan from the four aspects of the population spatial structure,the city size distribution,the traffic network structure and the economic spatial structure.The results show：the urban agglomeration network,which is based on the traffic network,has taken a basic shape;the scale structure of the urban agglomerations is rather complete while the primacy ratio of the cities is too huge;the development of small and medium-sized cities is rather satisfying and the development of big cities is relatively slow.The development of urban agglomerations has undergone a long period of spatial polarization process,and gradually transformed into dispersed and balanced one.The spatial structure and its evolution of urban agglomeration are mainly affected by natural conditions,demographic factors,transportation network,economic foundation and policy planning and so on.