1. Key Laboratory of Regional Sustainable Development Modeling, CAS, Beijing 100101, China 2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China 3. Collaborative Innovation Center for Geopolitical Environment of Southwest China and Borderland Development, Kunming 650500, China
Urban agglomeration plays a key role for China in attending the global divisions of labor, international competitions, as well as the integration of regional economy. Various scholars have dedicated to the study of urban agglomeration. However there is no consensus on the definition of urban agglomeration, which leads to the controversy. Relations between each city-pair in an urban agglomeration may form a complex network which brings a great challenge for researchers to use traditional method to synthetically analyze the spatial structure, due to the exponential calculation time increased by a great number of nodes. Based on the summary of different definitions, a novel method is developed to analyze the multi-level spatial structure of an urban agglomeration. We first find the core cities by calculating the urban centrality of each city in an urban agglomeration using several selected indices. To be specific, the spatial scope of the urban agglomeration can be defined as the 2-hour commute range of each core city. Then interaction intensities between each pair of cities are calculated based on the traffic accessibility and cities' scale. We develop an algorithm to analyze the spatial structure based on the so-called Multi-level Spatial Structure Tree (MSS-Tree), which can be used to analyze the urban agglomeration structure in detail. Finally, we carry out the sample study of Beijing-Tianjin-Hebei urban agglomeration to testify the model. The experimental results show that due to the centrality of Beijing downtown area, cities or towns around Beijing have much more interactions with Beijing than among themselves. It could be concluded that mature sub-center cities or towns around Beijing are needed to take the responsibility of service provision. In comparison, Tianjin downtown area and Tianjin coastal district have double cores in Tianjin. Hengshui city far away from Beijing downtown area has the potential to become a secondary central city in the near future. The case study also demonstrates that the algorithm based on the MSS-Tree data is an effective method for the spatial analysis of an urban agglomeration, and can play an important role in subsequent decision makings of urban agglomeration development.
方创琳. 城市群空间范围识别标准的研究进展与基本判断. 城市规划学刊, 2009, (4): 1-6. [Fang Chuanglin. Research progress and general definition about identification standards of urban agglomeration space. Urban Planning Forum, 2009, (4): 1-6.]
苗长虹, 王海江. 中国城市群发展态势分析. 城市发展研究, 2005, 12(4): 11-14. [Miao Changhong, Wang Haijiang. The analysis on developmental situations of China's urban agglomerations. Urban Studies, 2005, 12(4): 11-14.]
Gottmann J. Megalopolis or the urbanization of the northeastern seaboard. Economic Geography, 1957, 33(3): 189-200.
Friedmann J. 1986. The world cities hypothesis. Development and Change, 1986, 17(1): 69-83.
Scott A J. Global City-regions: Trends, Theory, Policy. New York: Oxford University Press, 2002.
张伟. 都市圈的概念、特征及其规划探讨. 城市规划, 2003, (6): 47-49. [Zhang Wei. The basic concept, characteristics and planning of metropolitan regions. Urban Planning, 2003, (6): 47-49.]
Dickinson R. The City Region in Western Europe. London: Routledge & KeganPaul, 1967.
胡序威. 区域城镇体系的协调发展问题. 城市规划, 2005, (12): 12-17. [Hu Xuwei. Coordinated development of regional urban system in China. Urban Planning, 2005, (12): 12-17.]
胡序威. 对城市化研究中某些城市与区域概念的探讨. 城市规划, 2003, (4): 28-32. [Hu Xuwei. Discussion on some urban and regional concepts in the study of urbanization. City Planning Review, 2003, (4): 28-32.]
姚士谋, 陈振光, 朱英明, 等. 中国城市群. 合肥:中国科技技术大学出版社, 2001. [Yao Shimou, Chen Zhenguang, Zhu Yingming, et al.The Urban Agglomerations of China. Hefei: Press of University of Science and Technology of China, 2001.]
顾朝林. 城市群研究进展与展望. 地理研究, 2011, 30(5): 771-784. [Gu Chaolin. Study on urban agglomeration: Progress and prospects. Geographical Research, 2011, 30(5): 771-784.]
周牧之. 托起中国的大城市群. 北京: 世界知识出版社, 2004. [Zhou Muzhi. Hold up Big Urban Agglomerations of China. Beijing: World Knowledge Press, 2004.]
Zhou Yixing. Definitions of urban places and statistical standards of urban population in China: Problems and solutions. Asian Geographer, 1988, 1(7): 12-28.
顾朝林. 中国城市经济区划分的初步研究. 地理学报, 1991, 46(2): 129-141. [Gu Chaolin. A preliminary study on the division of urban economic regions in China. Journal of Geographical Sciences, 1991, 46(2): 129-141.]
高鑫, 修春亮, 魏冶. 城市地理学的“流空间”视角及其中国化研究. 人文地理, 2012, 27(4): 32-37. [Gao Xin, Xiu Chunliang, Wei Ye. Study on the sinicization of "space of flows" basing on the visual angle of urban geography. Human Geography, 2012, 27(4): 32-37.]
赵渺希, 吴康, 刘行健. 城市网络的一种算法及其实证比较. 地理学报, 2014, 69(2): 169-183. [Zhao Miaoxi, Wu Kang, Liu Xingjian. A novel method to approximate intercity networks and its empirical validation. Acta Geographica Sinica, 2014, 69(2): 169-183.]
Wall R S, Knaap G. A. Sectoral differentiation and network structure within contemporary worldwide corporate network. Economic Geography, 2011, 87(3): 267-308.
Taylor P J, Derudder B, Hoyler M, et al.New regional geographies of the world as practiced by leading advanced producer service firms in 2010. Transactions of the Institute of British Geographers, 2013, 38(3): 497-511.
Derudder B, Witlox F. An appraisal of the use of airline data in assessing the world city network: A research note on data. Urban Studies, 2005, 42(13): 2371-2388.
O'Connor K, Fuellhart K. Cities and air services: The influence of the airline industry. Journal of Transport Geography, 2012, 22(5): 46-52.
Taylor P J. New political geographies: Global civil society and global governance through world city networks. Political Geography, 2005, 24(6): 703-730.
Hoyler M, Watson A. Global media cities in transnational media networks. Journal of Economic and Social Geography, 2013, 104(1): 90-108.
路旭, 马学广, 李贵才. 基于国际高级生产者服务业布局的珠三角城市网络空间格局研究. 经济地理, 2012, 32(4): 50-54. [Lu Xu, Ma Xueguang, Li Guicai. Spatial pattern of regional city network based on international advanced producer services' layout in Pearl River Delta. Economic Geography, 2012, 32(4): 50-54.]
赵渺希, 刘铮. 基于生产性服务业的中国网络研究. 城市规划, 2012, (9): 23-28, 38. [Zhao Miaoxi, Liu Zheng. Research on China's city network based on production service industry. Urban Planning, 2012, (9): 23-28, 38.]
薛俊菲. 基于航空网络的中国城市体系等级结构与分布格局. 地理研究, 2008, 27(1): 23-33. [Xue Junfei. Hierarchical structure and distribution pattern of Chinese urban system based on aviation network. Geographical Research, 2008, 27(1): 23-33.]
汪明锋, 宁越敏. 城市的网络优势: 中国互联网骨干网络结构与节点可达性分析. 地理研究, 2006, 25(2): 193-203. [Wang Mingfeng, Ning Yuemin. The network advantage of cities: An analysis of spatial structure and node accessibility of internet backbones in China. Geographical Research, 2006, 25(2): 193-203.]
王珏, 陈雯, 袁丰. 基于社会网络分析的长三角地区人口迁移及演化. 地理研究, 2014, 33(2): 385-400. [Wang Jue, Chen Wen, Yuan Feng. Human mobility and evolution based on social network: An empirical analysis of Yangtze River Delta. 2014, 33(2): 385-400.]
Levy M. Scale-free human migration and the geography of social networks. Physical A: Statistical Mechanics and its Applications, 2010, 389(21): 4913-4917.
Hu Y, Wang Y, Di Z.http://arxiv.org/abs/0802.0047, 2012-10-25.
Christaller W. The Central Places in Southern Germany. Translated (in part) by Charlisle W. Englewood Cliffs: Prentice Hall, 1966.
顾朝林. 城市实力综合评价方法初探. 地域研究与开发, 1992, 11(1): 5-11. [Gu Chaolin. Methods of evaluating the urban comprehensive strength index. Area Research and Development, 1992, 11(1): 5-11.]
顾朝林, 石楠, 张伟, 等. 中国高新技术区综合发展评价. 城市规划, 1998, (4): 21-24. [Gu Chaolin, Shi Nan, Zhang Wei, et al.A study on comprehensive evaluation of high/new technology development zones in China. Urban Planning, 1998, (4): 21-24.]