基于卫星遥感的区域土地利用/覆盖变化研究

利用新疆于田地区1976年Landsat MSS、1989年Landsat TM、1999和2001年Landsat ETM影像以及2001年实地考察的数据，对该地区25年来的土地利用／覆盖变化进行了研究。结果表明1976～2001年，于田绿洲的土地利用／覆盖变化发生了较为明显的变化，主要表现在绿洲内部各种土地利用／覆盖类型发生着相互转化，农田的数量不断增加，高、中、低密度草地逐渐向中、低密度草地和荒地过渡，绿洲与外部物质、能量的交换逐步趋向稳定，绿洲的面积逐渐扩大。稳定性也逐渐提高，且逐渐向新的平衡演变。

A Study on Regional Land Use/Cover Change Based on Satellite Remote Sensing Technique

In the paper,data of Landsat MSS in 1976,Landsat TM in 1989,landsat ETM in 1999 and 2001 and some data of the nature and the people in Yutian oasis were used to examine the Land use/cover change during this 25-year period,some conclusions were drawn as follows:The land use/cover change in the Yutian oasis took place greatly from 1976 to 2001 with the growth of the supply of water. The various types of the land use/cover inside the oasis had transformed each other.The number of the farmland increased.The cover of high-density grass,middle-density grass and low-density grass have transferred to middle-density grass,low-density grass and desert,respectively;the interchange between the oasis and the outside has come to an stability;the area of the oasis has enlarged. Therefore the stability of the oasis improved and is gradually developing to a new one.