辽宁沿海城市带界定及其结构特征分析

目前城市群已成为中国城镇化发展的主体形态之一。辽宁沿海城市带是中国城市群结构体系中的一个新兴城市群,在沿海开发与东北老工业基地振兴中起着战略支点作用。首先根据城市群内涵构建城市群空间范围识别指标体系,据此对辽宁沿海城市带进行空间界定。在此基础上,从多中心性、功能性、网络性3方面深入分析该城市带的结构特征。结果表明,辽宁沿海城市带人口规模与人口密度均表现出显著的多中心性特征,但是人口规模中心与人口密度中心的等级分布并不完全对应。而且大连-营口-盘锦发展轴的城市中心表现为强集聚型特征,城市带东西两翼表现为弱集聚型特征。城市带工业生产功能具有区际意义,而生产性服务功能的区际影响还很有限。内部各城市的工业结构趋同性明显,但是在服务功能、交通运输功能、商业功能等方面各具优势,已形成较为明确的分工与互补关系。辽宁沿海城市带交通网络发育比较完善,交通网络体系基本形成。内部各城市基于交通网络实现了较好的经济联系网络链接,城市带的点轴空间结构已经形成并且开始向网络结构过渡。

Space Identification and Structural Characteristics of Liaoning Coastal Urban Agglomeration

Urban agglomeration has been one of the main space patterns of the urbanization process in China,which is the general product during the advancing stage of urbanization. Liaoning coastal urban agglomeration is the emergent in the structure system of Chinese urban agglomeration. Owing to advantaged location and development foundation, Liaoning coastal urban agglomeration in recent years has become the core region to promote the coastal development and revitalize the traditional industrial base of Northeast China. Based on comparative analysis on the relative concepts of urban agglomerations, this paper identifies the spatial extent of Liaoning coastal urban agglomeration according to the defined standards. Then it provides a research on structure characteristics of the urban agglomeration from polycentricity, function and network. The conclusions are as follows: first, both the population scale and density show significant characteristic of polycentricity, however, these two kinds of cores are not correspond with each other. The cores on the development axis of Dalian-Yingkou-Panjin are characterized by strong concentration, the ones on the east and west wings show the contrary characteristic. Second, the industrial function is in dominant position among the inter-regional division of labor but the productive services have not great influence on other regions. And the intra-regional industrial structure has great homogeneity while the service, transportation, commercial trade are complementary each other. Third, the transportation network is maturing and its system is forming. The intra-regional make close economic contacts with the transportation network. In a word, the point-axle spatial structure has been formed and developed towards network structure in Liaoning coastal urban agglomeration.