This paper is an empirical study of the urban expansion of Nanchong by applying the urban fractal theory. Based on multi-temporal Landsat TM remote imaginary data and Geographical Information System, this paper systematically discusses the spatial layouts and patterns of Nanchong city in selected periods since the 1980s through the 2000s via analyzing the response to urban fractal theory and examining the expansion feature in all directions from the city center. As methodology, we extract the geometric data from the remote images of years including 1988, 1993, 1999, 2002, and 2007, and overlap the extracted images by GIS as to conduct comparison over periods. On the one hand, as response to the urban fractal theoretical analysis, the city shows no significance in urban fractal features, but with two sections with evident difference in fractal dimension parameter. In accordance to the findings, we diagnose the distinct share of driving forces of urban expansion in relevant periods--that the natural growth force dominates in early stage of urban expansion, but the comprehensive growth force, combining natural growth and mechanical growth, dominates the period thereafter. On the other hand, Nanchong city has been growing in particular direction since the 1980s--both to the northeast and to the southwest, displaying the stability over time and indicating the potential growth corridor in the future. Based on those findings, a spatial model is established to formulate the expansion patterns.
祝昊冉,冯健. 经济欠发达地区中心城市空间拓展分析——以南充市为例[J]. 地理研究, 2010, 29(1): 43-56.
ZHU Hao-ran, FENG Jian. Urban spatial expansion in less developed region of China: A case study of Nanchong. GEOGRAPHICAL RESEARCH, 2010, 29(1): 43-56.