Studies On The Model Of Spatial Structure In Ganjiang Basin

Spatial structure study has been entering a new phase and integration with regional development more and more tightly. As one of the typical regions, basins have characters of systemic and self-organizing, which provides scientific foundations for modeling basin spatial structure.This dissertation focuses on modeling basin spatial structure taking Ganjiang as an example. Firstly, refines the conceptual model of evolution process of spatial structure in Ganjiang basin based on analyzing the historical data. Secondly analyzes the 'core-periphery' structure, centrality of cities, spatial accessibility of communication facilities, exploitation process of rivers, and spatial structure of ports in Ganjiang basin. Then develops an evolution model of basin spatial structure in light of self-organization theory of city spatial structure. Lastly, concentrates on optimizing the spatial structure of Ganjiang basin.Conclusions are drew as follows:1. The economic framework of Ganjiang basin is typical structure of core-periphery, with Nanchang, Xinyu, Fuzhou as the core economic zone, Jingdezhen as the secondary core economic zone, and the others as periphery zone;2. The centrality of cities is not manifest and city system is imperfect for lacking middling cities. As result, there are no cities which can serve as growth-poles except Nanchang. As capital of the province, Nangchang has not played a leading role in economic development since both its own strength and those of the other middle cities are not strong enough;3. The development of road network enhances the interaction between cities within the basin as well as those outside. Meanwhile, the gap between different areas in economic development is diminished. Building road network has become the main measure to adjust regional development;4. Ganjiang river was the main channel connecting Yangtze river and Pearl river in history, profit ' from which, Jiangxi province once became one the of most prosperous areas. But Jiangxiwent into a rapid descent and has become the economic periphery zone now, along with status of main ports falling resulting from lacking specification and centrality;5. The evolution of spatial structure went through several stages in Ganjiang basin, such as inside filling, Dual-nuclei structure forming and developing, etc.. Before Tang dynasty, main cities appeared in core of branch river and in the nodes of main river. After that the relative position of cities on main river changed. Jiujiang, exceeding Ganzhou, became the secondary city in Jiangxi and constructed Dual-nuclei structure with Nanchang after Qing dynasty;6. Basin spatial structure evolution is affected by factors of rank of riverway, geometric centrality of cities, and size of hinterland. Simulation indicates that different exploiting models of basin appear different spatial structures, mainly including 2 types: single core model with the basin center city or gate city as the core, Dual-nuclei structure consists of port and regional central city. This result is verified by cases of Ganjiang, Minjiang, and Hanshui basin.7. Ganjiang basin should organize spatial economic patter along the main line consists of . Jiujiang, Nanchang, Xinyu and Pingxiang. By accepting diffusion from Shanghai, Guangzhou,Hung Kang etc., Shangrao, Ganzhou can develop into new regional growth-poles.