Abstract:

Companying with quick speed of industrialization and urbanization, urban land expanding with a high speed, the contradiction between the construction and feed become more and more severe. It comes to be a problem pressing for solution how to use urban land rationally and effectively in the process of quick urbanization. By the remote sense image of several time phases and correlative models, analyzing and simulating the temporal-spatial features of urban land expansion can provide the scientific foundation for the arrangement of urban land. By selecting the remote sense image taken in the years of 1987,1990,1997,2001 and 2006, through interpreting, the urban land use data were obtained. On this basis, the expansion characteristics of urban land of Nantong City within nearly 20 years were analyzed, and trends of its expansion were simulated. The results show that urban land expansion in Nantong City possesses different characters in four periods of the year 1987 to 1990, 1990 to 1997, 1997 to 2001 and 2001 to 2006; the heat point of the expansion is mainly concentrated in the region along the Yangtze River, and the heat extent of the expansion in the region along the sea is rising gradually; the expansion of urban land exhibits the trend of the city and town groups, and especially the scope of Nantong Urban Area is more clearly.

Key words: urban land, expansion simulation, Nantong City