Study On The Spacial Arrangement Of Urban System Based On The Fragile Eco-environment In Ningxia Hui Autonomous Region

Urbanization is a necessary tendency of mankind progress in 20 century,Urban system is the regional combining form of urbanization,whose occurrence and development have the necessary and close connection with the surrounding natural system, and this connection is adequately shown by the regional features, the spatial pattern and (the spatial) arranging rules of urban system.Situated in northwest China, Ningxia has the typical eco-environmental problems of west China such as water and soil erosion, soil salinization, land desertification, and so on, so that there is a sharp contradiction between the spatial development of urban system and the eco-environmental conservancy. The thesis attempts to analyze the regional features of the spatial arrangement in Ningxia's urban system from the angle of natural ecology and put forward the appropriate pattern of urban system's spatial development.The thesis starts with a retrospect of the theory origin of the recent and modern times' region and urban planning, and the related theories of ecology system and urban system's spatial arrangement. Then it analyses the history evolvement of Ningxia's eco-environment as well as the existing problems. On the premise of the understanding of the whole Ningxia's eco-environment, it focuses on the eco-environment subarea of spatial development of Ningxia's urban system and discusses the relationship between the urban's spatial arrangement and eco-environment. In the end, on the basis of clarifying the development strategy of urban system's spatial arrangement, the thesis proposes the spatial arrangement pattern of Ningxia's urban system.