| The research on urban spatial morphology, a fundamental study which combines theory and practice, intends to reveal city growth mechanism which is drove by a variety of factors, has been being explored in the field of geography, sociology and urban planning for a long time. It will help to enrich the urban theory and guide urban planning by grasping the dynamic evolution of urban form, exploring the growth mechanism of urban morphology and structuring a reasonable urban form.With the great demographic, economic and social development in China since1990s, urban development is facing a new challenge now. Urbanization process of China has accelerated; City growth experiences two-way process which includes expansion of the external contours and adjustment of the internal spatial structure; Urban structure has undergone rapid and dramatic changes, and its dynamic mechanism has become more complex.Based on the profoundly understanding of the social changes discussed above, this article delves the evolution process and dynamic mechanism of Shaoyang city proper as well as gives forward recommendations and guidance for the future development of urban form of Shaoyang city proper through the perspective of urban form concepts, which mainly focuses on the spatial expansion theory; supported by the economics theory and the sustainable development theory; and all the research results and recommendations are made by using urban external spatial expansion and internal land utilization as the breakthrough point, RS and GIS technology as technical means, fractal dimension, compact ratios, shape index, expansion intensity index and information entropy index as the measuring indexes. The findings indicate:(1). Since the90’s of the twentieth century, urban spatial pattern of Shaoyang city proper has experienced a change from low-density urban sprawl to axial extension likes fingers. Seen from the external urban form, urban form of Shaoyang city proper shows the following characteristics: compact ratio of the urban form remains low, and the land expansion is too extensive; boundary fractal dimension stays largely low, and the urban form owns relatively high stability, strong filling capacity; urban form, which is a long rectangle shape, tends in zonal shape, and displacement of the city geometrical center changes small. Looking into the internal structure of land use, it is in the trend of harmonious, mature, and stable.(2). Natural condition is the base exogenous driving force to model the urban form; economic-technology is the fundamental endogenous driving force; governmental action is the exogenous driving force to control the urban pattern; social class is the catalyst to assist the evolution. Therefore, these four factors shaped the urban form evolution of Shaoyang city proper in the new era.(3). Based on all the analysis and the challenges which Shaoyang city proper are facing in the modern society, this thesis suggests that the future urban space extension direction of Shaoyang urban area would be "expand eastward, span northward, and extend southward properly". And it puts forward a spatial model for the city, which are old city renewal; new town-cooperation; production city fusion; traffic integration; landscape city; development of urban integration of Xinshao and Shaoyang city proper, etc. Meanwhile, the thesis recommends the space pattern of central Shaoyang, which is "two bands, two axes, two towns, four districts". And it proposes the collaborative planning model for Shaoyang urban area and Xinshao, which is "one band, two axes, one main urban area, and two districts". |
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