南通市城镇建设用地扩展时空特征分析及模拟

随着工业化与城市化步伐的加快，城镇建设用地高速扩张，建设与粮食生产的矛盾日益突出，如何合理有效使用土地成为城市快速发展过程中迫切需要解决的问题。通过多时相遥感卫星影像，结合相关模型，分析和模拟建设用地扩展的时空特征，可以为城市土地合理配置与投放提供依据。利用 1987、1990、1997、2001、2006年的TM卫星遥感影像解译获得的建设用地数据，分析了南通近 20年来城镇建设用地变化和城区扩展特征，并且模拟了其扩展趋势。结果表明：南通市城镇建设用地扩展呈现明显的阶段性特征；其扩展的热点主要集中在沿江区域，沿海地区城镇建设用地扩展的热度逐步升温；城镇建设用地扩展显示出城镇组团化发展的趋势，尤其使南通大都市区的轮廓日益明晰。

ANALYSIS AND SIMULATION OF THE TEMPORAL SPATIAL FEATURES ON URBAN LAND EXPANSION IN NANTONG CITY

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.