基于RS的崇明东滩空间动态变化研究

崇明岛东滩因其特殊的自然条件及频繁的人类活动影响，土地利用空间格局变化速度较快。通过对1988—2002年6幅不同时相TM遥感影像解译，对崇明东滩土地利用进行分类，得到东滩15年间的土地利用空间变化图；再利用GIS技术，从数量和空间分布上对其土地利用动态变化过程进行定量计算，结果显示东滩土地总面积不断增加，土地利用方式逐年变化。东部岸线明显向东扩展。同时结合考虑自然因素和人为因素影响，探讨了崇明东滩空间动态变化的原因。为更加合理的开发利用东滩提供了有力的参考，也表明了RS与GIS技术相结合对于研究东滩空间格局演变有一定的应用价值。

The spatial pattern dynamic changes using remote sensed in Chongming Dongtan

Land use spatial pattern changes fast in Chongming Dongtan for its special natural conditions and frequent human activities. This paper classifies land use by interpretation six images of remote sensing from 1988 to 2002 and obtains land-use plots during 15 years in Chongming Dongtan. The result from quantitative calculation of dynamic changes of land use in both quantity and spatial dis-tributon with GIS technique shows land area of Dongtan is increasing. The method of land use is changing and the east coast line is expanding in the eastern every year. At the same time accounting for natural and artificial factors, this paper analyzes the reason for siltation in Dongtan,and provides potent reference for better exploitation and utilization in Dongtan. The result showing the general information from remote sensing and geographic information system is also valuble to study evolution of speatial pattern in Dongtan.