Abstract:

Transportation is one of basic functions of city. It can provide a positive effect to city development, economy growth and society economy. Accessibility, as a factor in traffic net technology performance evaluation system, is an important reason in region role reshaping and newly organizing. As a result, the evolution of accessibility reflects region spatial structure, and we can identify the problem of regional spatial optimization through it. Theoretically, a good regional pattern means better developing mode, even can make region sustainable development come true. With the help of spatial analysis methods in ArcGIS and model of accessibility evaluation, combined with SPSS and Matlab, this paper selected 1998, 2008 and the planning year of 2020 as time section, used the raster method estimating the transport accessibility in Poyang Lake Ecoecological Zone to analyze evolution characteristics of accessibility pattern, to build economic link evaluation model according to city quality and time distance, and to predict the city quality in 2020 by regression analysis. We calculated the agglomeration index of economic link and analyzed the economic radiation range between cities and the change of subjection relationship through the evolving of maximum economic link pattern in three time periods. The results showed that the accessibility improved significantly, and the gap between cities was narrowing. In 2020, one day exchange will come true. The concentration of economy gross is obvious, and it begins polarizing. As the barrier affection of Poyang Lake, the region becomes an economy pattern which has three economy centers such as Nanchang, Jiujiang and Jingdezhen, and the other cities in this region are subordinate to these three centers. It suggests that the traffic infrastructure from Nanchang to Guixi, especially the road from Dongxiang to Yingtan should be improved, to promote the city of Yingtan as the fourth economy center, and to achieve balanced development in Poyang Lake Ecoecological Zone.