A Study On Urban System Structure And Its Optimization Mechanism In Sichuan Province

According to the development of Chinese city 2010 report statistics, by the end of 2009, China's urbanization rate is only 46.6%, but the more than two-thirds of GDP made in the cities, accounting for 0.39% of the urban construction land area lived more than one quarter of the population. Visible, the city is the main carrier of social economic activities. Facing the country the implementation of the western development strategy, Chengdu and Chongqing as urban and rural synthetically reform the establishment, As the western province of Sichuan, its each city's development is also faced with a new opportunity.Based on the scientific development view and related planning theory as the guide, with time and space for context, comprehensive use of qualitative and quantitative analysis, the geographical analysis, charts, logic analysis and other methods, multiple perspectives, wide view to Sichuan province from the three structures—a scale structure, spatial structure and functional structure have been studied, focus on its present situation structure characteristics, and conduct of the corresponding optimal path.Paper is divided into three sections. The first part includes the first chapter and the second chapter, Mainly analyses the papers to choose a background, significance and research methods, and in domestic and foreign research based on urban system, in order to center review to theory, regional spatial growth pole theory and the core-periphery as the theoretical basis, and combined with actual situation of province, and puts forward the research content and ideas of this paper.The second part is the third, fourth, the fifth chapter, also is the main body part of this paper. This paper from the status of population size structure of Sichuan, start a comprehensive analysis of the size of its urban system structure, functional structure and spatial structure. Study found that the current existence of Sichuan urban system the following characteristics:As the end of 2009, the urbanization rate was only 38.7% in Sichuan, China's urbanization rate was 46.6%, visible, Sichuan, is still relatively low level of urbanization; The scale of urban system structure is unreasonable. The article also analyze the characteristic of the city's first law, that the first degree of the city in Sichuan,4 cities and 11 cities index of high, prominent role of the primate city, Lack of 100 to 200 million people mega cities, need some basic conditions good, potential big cities to develop regional mega cities, compensate for urban system fault defects. Using fractal theory and founding that the size distributions in the Sichuan city system Consistent with the rank-size rule, the fractal dimension D is less than 1 and smaller every year in recent years, indicating that differentiation in the urban system increases, the scale has been focused on the distribution Trends; Functional structure of urban system is not harmonious. Sichuan Urban low-level of overall industrial structure, second and third industry is underdeveloped, statistical analysis function by Nelson calculate, found that the degree of specialization city functional structure convergence insufficiency, to spare, divergent division is not clear, and functional specialization degree is low, and the advantage industry uneven, difficult to effectively play not outstanding city center function; Spatial structure of urban system is not perfect. In ChengKun railway bounded Baocheng, population density and urban density was less the East more than distribution of the phenomenon of the West, urban space development was along the main rail, road and waterway transportation routes such as distribution, and gradually build to form the Chengdu Plain, Southern Sichuan, Northeastern Sichuan and Panxi four spatial structure of urban agglomerations urban agglomerations. Part of cities and states, such as Aba, Liangshan and Bazhong, the traffic situation in the province is relatively backward, railway, highway network very imperfect; transport accessibility is poor, much-needed improvement.The third part includes chapter 6 and 7, is the optimization of the paper and the conclusion section. Mainly from scale structure, functional structure and spatial structure of the three aspects of Sichuan, pointed proposed urban system structure optimization idea and development path. Scale structure, should strengthen the super cities, actively cultivate the mega cities, focus on developing the big cities, make great efforts to improve small and medium-sized cities and small towns to form the structure of scale by "super cities-mega cities-big cities-medium-sized cities-small cities" of composition is distinct, scale reasonable, and orderly operation urban system scale structure; Functional structure, each city should strengthen the functions of the division of labor and cooperation, completes the city leading function orientation, improve industrial structure hierarchy, break administrative barriers and walk urban agglomeration development road of the regional cooperation, in order to form a clear division of work, cooperative development and efficiency of modern city functions both justice system; Space structure, to take "perfect point, strengthen line, develop plane" of the optimization ideas, to form a metropolitan area of Chengdu as "level 1 nets", relying on the "subprime nets" center cities, formation in a quick traffic trunk road, major river basins for the development of the main axis of the urban system network pattern.