基于夜间灯光数据的长江中游城市群城镇体系空间演化研究

发布时间：2018-07-14 20:43

【摘要】：在明确界定“长江中游城市群”空间范围的基础上,选择DMSP/OLS夜间灯光影像数据确定城市样本,利用城市位序规模法则、加权标准差椭圆及空间引力模型等分析方法,对长江中游城市群城镇体系规模分布及空间演化特征进行分析。研究发现,长江中游城市群呈现以武汉都市圈、长株潭城市群和环鄱阳湖城市群为“核心”的C-P结构。现状城市规模体系的地理集中度较低,并呈现逐步“集聚增长”的演化特征,城市集中度持续增强且城镇体系“数量增长”特征显著。城市群规模增长空间演化呈现明显的先收缩后扩张、先向西北方向移动再向东南方向移动的特征,西南部环鄱阳湖地区城市规模增长明显快于其他区域。在武汉、长沙、南昌三大城市周边50-100公里左右区域已初步形成一批发展潜力巨大的“边缘城镇群”。从经济空间联系强度格局演化看,长江中游城市群城市组团“多极化、碎片化”特征显著,武汉都市圈组团、长株潭组团和南昌-九江组团扩张显著,从而严重挤压了宜昌组团和萍乡-宜春-新余组团发展。
[Abstract]:On the basis of clearly defining the spatial range of "urban agglomeration in the middle reaches of the Yangtze River", the urban samples are determined by DMSP / OLS night light image data, and the analysis methods such as the law of city order scale, the weighted standard deviation ellipse and the spatial gravity model are used. The scale distribution and spatial evolution characteristics of urban system in the middle reaches of Yangtze River are analyzed. It is found that the urban agglomeration in the middle reaches of the Yangtze River is composed of Wuhan metropolitan area, Changsha-Zhuzhou-Xiangtan urban agglomeration and Poyang Lake urban agglomeration as the "core" C-P structure. The present urban scale system has a relatively low degree of geographical concentration and presents the evolutionary characteristics of "agglomeration and growth". The urban concentration continues to increase and the urban system is characterized by "quantity growth". The spatial evolution of urban agglomeration scale growth shows the characteristics of first shrinking and then expanding, moving first to northwest and then moving to southeast. The urban scale of the southwestern region around Poyang Lake is increasing faster than that of other regions. In Wuhan, Changsha, Nanchang, around 50-100 kilometers around the city has formed a group of potential development of "marginal town groups." From the view of the evolution of the intensity pattern of economic spatial connection, the urban groups in the middle reaches of the Yangtze River are characterized by "multi-polarization and fragmentation", while the Wuhan Metropolitan Circle, Chang-Zhuzhou-Xiangtan and Nanchang-Jiujiang urban agglomerations expand significantly. Thus seriously squeezed the Yichang group and Pingxiang-Yichun-New Yu group development.
【作者单位】：河北工业大学;国务院发展研究中心;

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