基于图谱特征的中国典型城市空间结构演变分析

The Evolution of Spatial Structure of Typical Cities in China on the Basis of Graph Spectral Features

基于地学信息图谱的方法论,选取中国典型经济快速发展的城市,对中国典型城市空间结构演变的现状进行分析。结合不同时期城市空间结构的图谱,探索城市化与城市空间结构演变的影响因素。通过对城市空间结构特征的理解和测度来把握城市空间结构的演变,总结在城市化背景下城市空间结构演变的时空规律,为城市未来健康、协调、有序发展提供服务。研究结果表明:①城市空间结构是城市的自然环境、经济、土地利用和城市交通等各种要素在空间组织分布形式和相互作用的过程。②城市化过程中人口大量向城市转移,对城市空间结构演变的影响总体呈扩增的趋势。③地形、河流港湾、人口和经济发展等是影响城市空间结构主要的因素。④良好的城市交通网络结构是城市得以正常运转的前提,城市经济快速发展离不开高效的交通网络系统;在城市交通的空间结构的扩展特征上显现出多种发展结构,如同心圆带状结构、扇形结构等。⑤在地形、水系等自然条件一定的情况下,城市的空间结构是由土地利用与城市交通网络在城市空间地域上相互制约和相互协调形成的。

Based on the methodology of Geo-info-TUPU,some typical cities with high-level economy development were carefully chosen,and the evolution process of typical Chinese urban spatial structures was analyzed at present day.In compliance with the graph spectral of urban spatial structures in different periods,some influencing factors were explored in the course of urbanization and evolution of urban spatial structures.Meanwhile,the evolution of urban spatial structure was mastered by the comprehensive understanding and measuring the features of urban spatial structure.Furthermore,with the purpose of offering service to the future city development in a healthy,coordinating and orderly way,the spatio-temporal principles of the evolution of urban spatial structure was summed up under the background of urbanization.The results of the study are showed as follows： 1） The formation of urban spatial structures is the process of space distribution forms and interaction among influencing elements such as urban natural environment,urban economic development,urban land utilization and urban transportation structures.2） Large numbers of population transfering into cities during the process of urbanization exerts the impacts of expansion developing tendency on the evolution of urban spatial structures.3） The major factors to affect the urban spatial structures are landform elements,river elements,bay elements,population elements and economic development,etc.4） Well-conditioned urban transportation network is prerequisite for the normal urban operation.Meanwhile,urban economic booming can not go without a high efficient urban transportation network system.In addition,the expansion of urban transportation network structures is characterized by various development structures,like concentric circles ribbon structure,sector structure and so on.And 5） under the definite natural circumstances,such as terrain elements,water system,etc.,urban spatial structure is formed by the interaction and coordination between land use and transportation network in the specific urban spatial region.