Research On Spatial Structure And Relevance Of Urban Network In Yangtze River Delta Based On Land Passenger Transport

Since the reform and opening up,China’s economic development is rapid,urban agglomerations continue to form and develop,and transportation network plays an increasingly important role.The multi-element and complex traffic network has become an important factor in the development of cities,especially in the formation and development of urban agglomerations.With the rapid development and popularization of the Internet,the relationship between cities is closer,and the research between cities and regions is more inclined to network.The research on urban network is emerging,and the research on urban network in China has gradually become the focus.Traffic flow,as the main carrier and manifestation of people flow,logistics and other elements,can reflect the social and economic relations between cities,which is of great significance for the study of the relationship and interaction between cities.With Anhui,North of Jiangsu and other regions being classified as a part of Yangtze River Delta Urban Agglomerate,the scale of Yangtze River Delta Urban Agglomerate has expanded,the grades of large,medium and small cities are complete,and the process of regional integration has been accelerated.The research of current status on the urban agglomeration spatial structure is conducive to grasping the advantages and disadvantages of the development of Yangtze River Delta Urban Agglomerate.Under the influence of different transport networks,the characteridtics and status quo of the spatial structure of Yangtze River Delta Urban Agglomerate can be more fully and objectively reflected,providing a theoretical reference for the construction of world-class urban agglomeration.This article takes the 26 cities of theYangtze River Delta City as defined in the “Yangtze River Delta Urban Agglomeration Development Plan” issued by the State Council in June 2016 as the research object.Based on the theories of flow space,urban network,spatial interaction and core edge,this paper uses social network analysis,big data capture,GIS spatial mapping and other analysis methods to explore the internal correlationcharacteristics of highway and railway passenger traffic flow in 26 major cities in the Yangtze River Delta,the results show:(1)The spatial network density of the Yangtze River Delta Urban Agglomerations based on highway and railway passenger flights is relatively high and the internal connections are close.(2)In the Yangtze River Delta city group,network centrality and network flattening coexist.The Yangtze River Delta city network is in the direction of flattening,but each city is not isolated.The highway and railway passenger transport have good complementarity,in which the railway passenger transport plays a leading role in the Yangtze River Delta city group.In the road passenger transport network,Shanghai is the core city of the road passenger transport network of the Yangtze River Delta urban agglomeration,which has a strong attraction to the surrounding cities.Suzhou and Hangzhou follow closely,but Nanjing,as the capital city of Zhejiang Province,does not develop as well as Hangzhou.However,in the railway passenger transport network,Shanghai and Nanjing have the highest centrality in the railway passenger transport network.They are the core cities of the railway passenger transport network in the Yangtze River Delta urban agglomeration,and Hefei follows closely.However,Hangzhou ranks relatively low,and has not become the network of Zhejiang Province The node of the heart.Compared with other provinces and cities,Anhui Province is at a disadvantage in the public rail passenger transport network.The reason for this difference is related to geographical location,policy and urban function.(3)The passenger transport shifts of highway and railway can be divided into four agglomerated subgroups,most of which are based on the layout of geographical location,some of which cross administrative boundaries,reflecting that the impact of administrative divisions on the connection between cities still exists.(4)Combined with the three time periods,the change range of highway passenger transport is relatively small,while that of railway passenger transport is relatively large,especially during the Spring Festival.Based on this,from the four aspects of city function and status,economic development,administrative planning and policy guidance,this paper explains the spatial structure and relevance of the network of urban agglomeration in the Yangtze River Delta.