基于交通信息流的江苏省流空间网络结构研究

基于江苏省13个地级市之间的公路、普速列车、高铁（CRH）与信息网络数据,从流空间视角对江苏省空间结构特征及其发展趋势进行综合分析与判断。结果表明：① 公路和普速铁路网络所展现的区域空间结构较为无序且影响范围有限,高铁网络则在大幅度拓展城市有效联系范围的同时凸显了发达地区的重要地位,而信息网络所反映的空间结构更加完整、有序与协调,代表了未来江苏省城市联系网络的发展方向;② 在高铁与信息网络的冲击下,流空间视角下的江苏省省域空间结构研究显出了一些区别于传统认知的新特征与变化趋势,如跳跃性的与非相邻地区产生主要联系、“等级+网络”的变化趋势等;③ 基于交通信息流的江苏省流空间结构呈现出明显的“中心-外围”格局,区域联系线密度由“沪宁线”向“沿海线”逐级递减,空间结构指数的计算结果也基本支持这一论断;④ 以高铁与信息为代表的新要素流对江苏省省域空间格局网络化的效率与公平产生了积极与消极两种影响,前者体现在改善区际可达性促进区域发展,后者体现在核心城市的“虹吸效应”。

The Urban Network Structure of Jiangsu Province Based on the Traffic and Information Flow

This article focuses on the differences of regional development and the changes of spatial structure resulted in the introduction of some new factors. Based on the data of road efficient, ordinary train, CRH and information network of 13 cities in Jiangsu Province, we analyses characteristics of provincial spatial structure and judge the development trend from the viewpoint of space of flows. The results are as follows: 1) The road and ordinary train network shows a relative disordered spatial structure and its impact scope is also limited. The CRH network highlights the important position of the developed areas and expands the effective range of the city along the Beijing Shanghai High-speed Rail greatly. The information network reflects a more complete, orderly and coordinated spatial structure, which also represent the future of the comprehensive linkage network in Jiangsu Province. 2) Under the impact of CRH and information network, the factors which dominates the regional spatial structure is not the space of places but the space of flows. So some new features and trends which are different from the traditional ones are found, such as connecting with non-adjacent cities and the tendency of “hierarchy+network”. 3) Different from the traditional judgments of spatial structure in Jiangsu Province, this paper which is based on the comprehensive linkage network of traffic and information flow presents the obvious pattern of "core-periphery". The regional connection density declines from HuNing line to the coastal line and the calculation of SSI also supports this assertion. 4) The new element flows generate positive and negative influence to the efficiency and justice of changes of the spatial pattern in Jiangsu province. The former reflects in the improvement of regional accessibility and promotes the development of regional economy and the latter reflects in the huge "siphon effect” in the core cities. But with the improvement of regional comprehensive connecting network and the strengthening of radiation in Shanghai-Nanjing axis, the cities in Middle-Jiangsu and North-Jiangsu will function more as the central cities and transfer stations on the other hand, which can also help the Yangtze River Delta to step into the era of network and polycentricity.