乌鲁木齐市土地利用/覆被变化研究

Land-use and land-cover change in Urumqi city

以乌鲁木齐市1990年10月9日的TM、1999年8月23日的ETM与2006年8月15日的ASTER遥感影像数据为基础,运用（GIS）相关软件（ENVI4.5）对遥感图像进行处理,提取土地利用信息,然后采用土地利用转移矩阵、单一土地利用动态度等方法,分析了乌鲁木齐市的土地利用数量变化特征,土地利用类型转换变化和单一土地利用动态度。结果显示：1990~2006年乌鲁木齐市建设用地、耕地、林地和水域面积都显示增加的趋势,其中建设用地的变化幅度较大,其增加量为7 022 hm2,未利用地面积显示持续减少的趋势,总过程中减少了11 742 hm2,它主要向建设用地、耕地和林地转换。

In this paper,based on multi-temporal remotely sensed data in 1990,1999 and 2006,we analyzed the land use change characteristics in the Urumqi from 1990 to 2006 and investigated the spatial difference of land use structures between different types,by using of transition matrix of land uses types and land use dynamic degree.The results showed that the land-use structure of Urumqi changed dramatically from 1990 to 2006,the construction land,cultivated land,forest land and water area have all been increased.The change of construction land is great,risen by 7 022 hm2,mainly expanded to northern part of the study area;Unused land continued decrease,it is decreased by 11 742 hm2,it is mainly changed to construction land,cultivated land and forest land.