基于遥感的绿洲动态变化研究——以艾比湖绿洲为例

Study on Dynamics of Oasis Based on Remote Sensing

采用艾比湖的1990、2001与2009年3期Landsat TM/ETM+遥感数据资料,运用ENVI4.5和ArcGIS进行制图分析得到了艾比湖区域土地类型转移矩阵,定量研究了艾比湖区域1990～2009年土地利用类型的时空变化特征,并分析了土地类型转入/转出贡献率。结果表明,1990～2009年,艾比湖绿洲分布特征有明显变化,面积也有显著的扩张,在转入和转出过程中,绿洲和未利用地之间的转换最为密切,水体面积在转换矩阵中基本上保持稳定趋势;从转入贡献率看,占优势的为绿洲,而转出贡献率中占优势的是未利用地。

By using Landsat TM/ETM ＋ remote sensing data of Ebinur in 1990, 2001 and 2009, applying ENVI4. and ArcGIS for map-mak- ing to obtain Ebinur land type transfer matrix, the temporal-spatial variation characteristics of land use types in Ebinur during 1990 -2009 were quantitatively studied, land type transfer into and out contribution rate was analyzed. The results showed that during 1990 -2009, the distribution characteristics of oasis in Ebinur changed obviously, oasis and unused land transferred closely, while water body area basically maintain standard trend. Oasis is dominant in transfer into contribution rate, unused land is dominant in transfer out contribution rate.