Research On Urban Agglomeration In The Middle Reach Of Yangtze River Economic Ties And Regional Integration

With the developing of economic globalization, the competition between regions is increasingly shown in several city aggregates based on the core of one or several big cities. As an important regional economic organization entity and a form of the combination of production layout within a certain area, economic circle has become an important vehicle for regional cooperation and enhanced regional competitiveness.However, the rapid development of economy and society also makes the gap of development between different regions expand rapidly. Thus, the overall economic development is growing imbalance. As an important part of China central strategy,middle reaches of the Yangtze River City Group bear the heavy responsibility of the entire central region of the economic development and social progress. Clearly understanding the state of development of intensity, direction, structure and other aspects of economic links between cities in middle reaches of the Yangtze River City Group has a far-reaching significance for the promotion of inter-optimized configuration and the enhancement of the overall competitiveness.Based on the characteristics of economic links between cities in middle reaches of the Yangtze River City Group.By the help of Arcgis10.0 software,we use analytical methods of urban traffic intensity model, the gravity model, economic position of the model, the urban flow strength structural models and so on to research the intensity, direction, and the structure of economic ties between 26 cities in Middle reaches of the Yangtze River City Group. The conclusion is as follows:In terms of strength of economic ties in middle reaches of the Yangtze River City Group, the intensity level and regional differences of economic ties are significant.Changsha and Wuhan are the contact center in the area for advantage of the urban flow intensity.With time going on, the overall intensity of economic ties in the area is increasing,the change of economic ties in different rank of cities are different and showed a periodic variation of characteristics,the Outbound functional capacity and functionality benefits of city plays a different role in the changes of the cities’ economic ties.In terms of direction of economic ties in middle reaches of the Yangtze River City Group,northern economic ties center with the core of Wuhan and the southern economic ties center with the core of Changsha are initially formed.The direction of two cores of economic ties radial concentric structure.As time goes on,the changes of economic ties direction of the overall urban agglomeration is smaller,but thedifference was significant variation between different regions, the southern economic contact center gradually expanded the scope of radiation to the northeast while the southern economic contact center gradually expanded the scope of radiation to the due west and southeast, The leading economic ties direction of urban agglomeration is biased in the west,the overall intensity and location of the eastern is lower,and two major cities aggregate of Xiangtan urban agglomeration and Wuhan city circle guide the main direction of economic ties in Middle reaches of the Yangtze River City Group.In terms of structure of economic ties in middle reaches of the Yangtze River City Group, the structure of economic ties with cities are obviously different.As contact centers of the urban agglomeration, the characteristic of the structure of economic ties of Wuhan and Changsha was that the city’s overall economic strength is greater than the city’s comprehensive service capabilities.As representative centers of the urban agglomeration, the characteristics of the structure of economic ties of Nanchang and Zhuzhou were different. Nanchang, represented by the industrial city,the city’s overall economic strength is greater than the city’s comprehensive service capabilities. Yichun.Hengyang and Yellowstone as the representative of the regional central cities, the city’s overall economic strength is weaker than the city’s comprehensive service capabilities. Yichun.Pingxiang, represented by the local central cities, the city’s overall economic strength is that both the city’s overall economic strength and comprehensive service capabilities are weak,and the city’s overall economic strength is weaker than the city’s comprehensive service capabilities.As time goes by, the urban agglomeration’s overall economic strengths and comprehensive service capabilities are both growing, but regional differences are noteworthy, showed a phased change characteristics.