Urban Agglomeration Spatial Structure Research In The Middle Reach Of Yangtze River

Spatial structure of urban agglomeration is the performance which a variety of material elements gather and configuration on the space. The interaction, the relative position and correlative of various material elements form spatial distribution patter and organizational relationships within each city group space unit. Urban agglomeration spatial structure is mainly the projection of population spatial structure and urban space structure, economic space structure, inter-city link in geographical space. This article research urban agglomeration spatial structure of the middle reaches of Yangtze river through the population spatial structure and urban space structure, economic space structure, inter-city link. Summarizing the characteristics of population, cities and towns, economy space structure and inter-city link in the middle reaches of the Yangtze River City Group, the spatial structure problems is found. According to the principles of urban agglomeration spatial structure optimization, I put forward policy suggestions on urban agglomeration spatial structure optimization in the middle reach of Yangtze river.This paper takes the Yangtze river middle reaches area as the research object, takes33cities as space research unit. The situation of the spatial structure of urban agglomeration in the middle reach of Yangtze river and intercity economic ties are analyzed by Using the spatial interaction model, contact strength membership, pyramid analysis, the city first law. Then, I put forward countermeasures of urban agglomeration spatial structure optimization in the middle reach of Yangtze river by revealing the spatial structure characteristics and problems.The main conclusions of this paper has the following six parts.(1) Urban agglomeration in the middle reach of Yangtze river with a total of33city divided into districts. Including Wuhan, Huangshi, Ezhou, Xiaogan, Xiantao, Qianjiang, Tianmen, Xianning, Huanggang, Jingzhou; Changsha, Zhuzhou and Xiangtan; Hengyang, Yueyang, Changde, Yiyang, Loudi, Nanchang, Jiujiang, Jingdezhen, Fuzhou, Yichun, Shangrao, Yingtan, Xinyu, Pingxiang, Hefei, Luan, Anqing, Tongling, Chizhou, Huangshan.(2) According central place theory analysis, the number of large and medium sized cities is insufficient and the development is severely limited in the middle reaches of the Yangtze River City Group (3) For its own sake, the administration layout "fragmented" in the urban agglomeration region has not reached a unified will.(4) According to the analysis of economic development index, the urban economic strength is insufficient and the spatial differences is large for each space unit.(5)Through the spatial interaction model, the economic relation degree of each space unit is insufficient in the middle reach of Yangtze river, economic radiation ability is not strong for the polar urban.(6) By analyzing the problems existing in the urban agglomeration spatial structure in the middle reach of Yangtze river, I think to strengthen central cities and cultivate large and medium sized cities, break the administrative barriers, secure the free flow of factors and optimize the allocation of resources, deepen economic development of the traffic axis, enhance the radiation ability.of the polar urban.