我国城市群中心地体系与聚集分形特征研究——以湖南“3+5”城市群为例

A Study on the Central Places System and Fractal Feature of China's City Group:The Case of Hunan“3+5”City Group

以湖南省为例,运用中心地理论与聚集分形模型分析了"3+5"战略规划下城市群的空间结构与等级体系。结果表明:"3+5"城市群的空间结构兼有市场原则(K=3)与交通原则(K=4)的双重性质,且服从K=133的勒施市场等级指数,属第46级市场区;同时,"3+5"城市群以一级中心地为中心,其二级中心地空间分布紧凑合理,三级中心地较为松散,四级中心地呈现内松外紧的双分形结构。

This paper had an analysis of the spatial structure and the hierarchy and also the random aggregation and physical mechanism of the central places of Hunan 3＋5 city group by using a combined method of the Central Place Theory and Fractal Theory.The results are calculated as follows：The distribution structure of the 3＋5 city group appears to similar to Christaller＇s K=3 system,however,symmetry breaking phenomenon makes it belong to the level-46 th market zone.With the first level central places being the center point,the second level central places present an obvious fractal structure characteristic.The third central places,however,present a insignificant fractal structure characteristic while the fourth level central place exhibit a more complex result,showing a double-form fractal structure.