近18年太湖流域土地利用变化及区域差异分析

Analysis of Land Use Change in Taihu Basin in the Past 18 Years

根据1990、2000和2008年TM/ETM影像资料,运用人机交互目视解译的方法,获取了土地利用信息,分析太湖流域近18年的土地利用变化特征,揭示了该流域各种土地利用数量变化的幅度、速度以及土地利用空间变化的主要类型、分布特征和区域差异。结果表明:①18年内,太湖流域土地利用发生了大幅度的变化,最为突出的是建设用地的迅速增加和耕地的大量减少;②太湖流域土地利用数量变化存在明显的区域差异。

Based on Landsat TM/ETM images of 1990, 2000 and 2008, land use information of Taihu basin was abstracted with man-machine interactive interpreting and analyzing method. And dynamic changes in land use in Taihu basin in the past 18 years were studied. It has revealed the rate of various land use changes and the main types, distribution and transfer direction of land use changes in space in this basin. The results showed that great changes took place in land use, particularly reflected by the noticeable decrease in area of cultivated land, and quick increase in construction land. There are significant region differences in land use quantity changes in Taihu basin.