人口流动视角下长三角城市空间网络测度及其腹地划分

Measurement of Urban Spatial Network and Its Hinterworld Division in the Yangtze River Delta from the Perspective of Population Flow

基于腾讯人口迁徙大数据,通过引入网络聚集度、节点中心性指数以及两种网络关联测度方法,对长三角地区人口流动网络结构进行分析后划分出中心城市网络腹地范围,并揭示出空间结构特征。研究表明:网络方面,长三角人口流动具有显著层级特征,形成"一主四副"多核心结构,网络联系整体呈"Z"型空间分布,具有地理集中性与强烈空间差异,且城市省际联系较弱;腹地方面,各中心城市网络腹地空间结构与人口流动网络特征相对应,具有重叠性、邻近性特征,并存在区域差异。可为合理制定城市发展战略、促进区域协同发展提供科学借鉴与参考。

Based on Tencent’s population migration data, this paper analyzes the structure of population mobility network of the Yangtze River Delta region by introducing network aggregation degree, node centrality index and two network association measurement methods, then can divide the hinterworld scope of the central city and reveal the spatial structure characteristics. The research shows that: In terms of network research, the population movement in the Yangtze River Delta has significant hierarchical characteristics, and forms a multi-core structure of "one main and four pairs". The spatial distribution of urban pedestrian flow is generally "Z" shape. Network connections show geographical concentration and strong spatial differences, and urban inter-provincial links are weak;In terms of hinterworld research,the spatial structure of the hinterworld of each central city corresponds to the characteristics of the population mobility network, with overlapping and adjacent features, and regional differences. In order to provide a scientific reference for the rational formulation of urban development strategies and the promotion of regional coordinated development.