20世纪90年代以来长江三角洲地区空间极化研究

以县(市)作为基本研究单元,采用综合指数法分别计算长江三角洲地区1991年、1998年和2005年经济社会发展综合指数,通过比较各单元经济社会发展综合实力的变化,研究20世纪90年代以来长江三角洲地区空间极化的特点。结果表明:长江三角洲地区区域极化明显增强,传统的核心—边缘格局没有发生根本变化,在核心区又出现了新的极化区域。基本上形成了具有城市等级体系的核心—外围空间格局,但网络结构和辐射轴尚不健全。

Study on Spatial Polarization of the Yangtze River Delta since the 1990s

There has been huge progress in economic development of the Yangtze River delta since the Reforming and Opening Policy.Many new characteristics of regional space pattern also appeared.This paper takes 67 cities/counties within the Yangtze River delta as basic units,seeks economic and social development composite index of each unit in 1991,1998 and 2005 by the method of principal component analysis.The paper studies spatial polarization characteristics of the Yangtze River delta through comparing changes of composite indexes of units.It is shown in the research that polarization is still the primary character of spatial development in the Yangtze River delta.New developing polarization has appeared,however,it still centralizes in the core area which takes Shanghai as the central city.Thus,it intensifies the centralization of essential factors in core areas,while the edge presents a relative slow development situation.The economic activities are inclined to economic center,transportation corridor,and river and coastal region obviously.The regional development strategy,the infrastructure construction,direct foreign investments,rural industrialization and the private-owned industrial cluster are the main reasons for spatial polarization.With enhancing the core status of Shanghai and regional infrastructure construction,spatial structure of the Yangtze River delta may change obviously.