区域空间网络化概念模型与过程研究——以泛长三角为例

Research on conceptual model and process of regional spatial networking——taking the Pan Yangtze River Delta for example

区域空间网络化是空间组织演化的必然趋势.泛长三角这一巨型的区域空间,将是我国未来优化经济发展空间格局的重点区域,也是研究空间网络化的典型案例区.基于已有的研究基础,提出区域空间网络化的概念模型假设,以泛长三角41个地级市为基本研究单元,通过修正的空间相互作用模型、潜能模型计算1996年、2002年、2008年、2014年城市潜能及城市间经济联系强度,同时借助社会网络分析方法(SNA)与反距离权重空间插值法(IDW),从节点、联系轴线、网络3个维度实证分析泛长三角区域空间网络化过程及其特征.研究表明:1)在1996年至2014年间,区域内各地城市潜能增幅显著,城市间联系加强且空间关联渐趋复杂化,泛长三角地区网络密度不断提高;2)城市的发展从低级到高级,空间结构由单核到多中心,城市等级体系走向偏平化特征,空间关联由孤立走向网络化;3)泛长三角网络化过程经历了4个明显阶段:从单中心集聚模式、点轴扩散模式、核心-边缘模式到多中心网络化模式.最后,对泛长三角区域空间网络化演化机理进行论述.对泛长三角空间网络化过程的研究,刻画了典型区域空间一体化及其形态演化过程,也为正在实施的区域经济一体化、长三角城市群的建设提供理论上的支撑.

Regional spatial networking is the inevitable trend of spatial organization evolution.The Pan Yangtze River Delta,as the giant regional space,will be the key area for optimization of the spatial pattern of economic development and the typical case area of the study on spatial networking.First of all,based on the existing research basis,the conceptual model hypothesis of regional spatial networking are proposed,and then the 41 spatial prefecture-level cities are used as the basic research unit,through modifying the spatial interaction model and the potential model to calculate urban potential and inter-city economic link strength in the 1996,2002,2008,2014.In the same time,from the three dimensions of the node-axis-network the space networking process and characteristics of the Pan Yangtze River Delta region are analyzed by using the social network analysis method（SNA）and the inverse distance weight interpolation method（IDW）.The results show that：1）during the period from 1996 to 2014,the urban potentials increased significantly in the region with the inter-city links strengthened and the spatial correlations becoming more complicated,and the network density in the Pan Yangtze River Delta area increased continuously;2）the development level of the city elevated from low to high,and the spatial structure changed from single to multi-center,urban hierarchical system to partial flat characteristics,spatial correlation from isolation to networking;3）the process of the Pan-Yangtze River Delta network has gone through four distinct phases：from single-center clustering model,point-axis diffusion model,core-edge model to multi-center network model.Finally,Discussion on mechanism of regional spatial networking in the Pan Yangtze River.On the one hand,the typical regional spatial integration and its morphological evolution process are described,and the spatial network theory of regional spatial structure theory is studied.On the other hand,theoretical support is provided on the regional economic integration of Yangtze River Economic Zone and the construction of the Yangtze River Delta city group.