Spatial integration of oasis city groups around the western margin of the Tarim Basin

The formation and development process of cities group is the integration and optimization evolvement process of its spatial structure.Researching the well spatial integration and organization can strengthen structural inter-reinforce among cities,which is helpful to seek the optimal cooperation avenue for cities group in the process of economics globalization and regional economic integration.The survey region chosen in this paper is situated around the western margins of the Tarim Basin.This paper analyzes the cities grade-configuration structure,functional structure,spatial morphology and economy connections between individual city using the factor analysis,gravitational interaction model and location entropy.the results are as follows:(1) The cities group is coming into being the grading structure which takes Kashgar as the center city,Artux Country,Marabishi Country and Yarkent Country as the sub-centers;(2) The center city Kashigar has a extensive contact with other cities and the subordination degrees between Kashigar and other city are on a high level;(3) The interactions between Kashigar-Shufu-Shule are the strongest,the interactions between Yarkent-Poskam-Kargilik take the second place.Based on the analysis mentioned above,this paper attempts to propose the overall thinking of cities group development,confirm its overall orientation in the future development,and present the strategy which can promote the coordinated development of all cities in the group.The strategies are as follows:(1) The Pole-Axes structures,including "One Core","Two Belts" and "Three Axes",more specifically,Kashigar,Shufu and Shule should be integrated to be a strong center,two belts are the urban belt along the south Xinjiang Railway and 315 National Highway,three axes are the two border city belts and one city belt along 214 Province Highway;(2) The circling structures,involving "Core Circle","Close Circle" and "Radiate Encircle";(3) The group structures,which divide the whole cities group into four smaller groups in order to make each city coordinate the other better.