Xijiang golden waterway development and restructuring of the urban system in Xijiang economic region of Guangxi
广西西江黄金水道开发与西江经济带城镇体系空间结构重构

China has been rapidly constructing its major transportation infrastructure such as high-speed railway and highway,waterway,which have great impacts on regional city development and urban system planning,so it is urgently needed to explore the impact evaluation method and to conduct empirical case studies.By taking Xijiang waterway development as a case study with AHP method,this paper firstly puts forward an impact evaluation index system consisting of 13 indexes in 4 aspects such as the improvement of regional economic location,the improvement of water transport capacity,the improvement of regional comprehensive transportation conditions and the potential of industrial development.Then,the differential impacts of Xijiang waterway exploitation on city development in sub-areas have been evaluated by using this index system.The results are shown as follows.(1) The impacts of Xijiang waterway development on city development are strongly concentrated on the axis of Xijiang riverside and are also different in different sub-areas.Thus,different sub-areas within Xijiang economic region should adopt different urbanization development strategies.The eastern sub-area should rapidly develop the city corridor along the Xijiang mainstream,the central sun-area should actively develop the metropolitan areas such as Nanning Metropolis,and the upstream sub-area should mainly develop characteristic cities.(2) Xijiang waterway development also has strong impacts on the regional urban system and its spatial structure planning.By conducting comprehensive comparison among the three spatial models such as the "Central Radiation" model,the "Golden Triangle" model and the "Reverse-T" model pattern,this paper concludes that the "Central Radiation" model,which is proposed by the "Guangxi Urban System Planning(2006-2020) ",is no long suitable,and the latter two models or their combination are more suitable.