Research on optimization and reorganization of spatial structure model based on eco-city and application:a case study of Xiangfan city

Based on progress reviews of eco city study at home and abroad,the rules of optimization and reorganization of spatial structure of eco city and the green center with around groups network spatial structure was put forward taking Xiangfan as case First, present eco city's research status and successful practices abroad, and concept of eco city, urban eco areas dividing, planning and design, evaluation index system and other theories and methods of eco city in China since 1980s were reviewed Second, authors put forward rules based on those reviews, which guide optimization of spatial structure of eco city They are: ① to perform natural harmoniousness fundamental to human; ② to develop at an appropriate scale and suit measures to local conditions; ③ to practise landscaping and achieve perfection and high efficiency;and ④ to pursue overall coordination and benign circulation And with these rules, authors commend new model of spatial structure named the green center with around groups network spatial structure model. Third, based on analysis of evolution and problems of its spatial structure, four development forms of urban land use were compared and urban land use for construction were comprehensively evaluated Combining population prediction, authors suggest that regional function collaboration of peripheral area with Xiangcheng and Fancheng should be strengthened, and planning idea of a continent, three mountains, three riversshould be stressed to guide city change to green centre with around groups network spatial structure in process of optimization and reorganization of spatial structure for creating modern ruralizing eco city Finally, authors think that eco city is an inevitable trend of city development; establishment of city development leading mechanism makes city turning gradually to an eco city that is more suited to human settlement;and green centre with around groups network spatial structure model is one of ideal urban spatial structures