山东半岛城市群城市规模分布演变特征

综合运用首位指数、城市规模基尼指数、信息熵及分形等理论与方法对山东半岛城市群城市规模分布的现状及演变特征进行分析。结果表明:2009年,山东半岛城市群城市规模结构属于位序-规模分布;城市体系中中等城市数量较多但规模较小,小城市数量显著偏少;城市规模空间分布不均衡,区域分异明显。改革开放以来,城市规模分布演变特征是城市数量与规模迅速扩张,尤其是中等城市数量增加较快;研究期内城市规模演变表现出弱收敛态势;城市规模分布的分维数不断增加,城市规模等级差异逐渐缩小,城市体系的均衡性增强。

Evolution characteristics of city-size distribution of Shandong peninsula urban agglomerations

The evolution characteristics of city-size distribution of Shandong Peninsula Urban Agglomerations have been analyzed by using the theories and methods of urban primacy index,fractal and Gini index and the information entropy and fractal theory.The result shows that Shandong Peninsula Urban Agglomerations structure belongs to the rank-size distribution;there are a larger number of medium-sized cities in the urban system,but on a smaller scale,and there is less in small cities.The urban scale spatial distribution is not balanced and regional differentiation is obvious.The city-size distribution of urban agglomeration have changed dramatically since the reform and opening up,with urban size and city numbers rapidly increasing,especially in medium sized cities;The urban scale evolution in the period of study shows the weak convergence rend;The fractal dimension of city-size distribution of Shandong Peninsula Urban Agglomerations is increasing,and the difference between urban scales is reducing to balance.