基于3S的近15a新疆LUCC时空变化研究及分析

Study on Spatio-temporal Variations of Land Use and Cover in Xinjiang Based on 3S Technology

以20世纪80年代末期新疆土地利用数据库为基础,以2004—2005年度中巴资源卫星影像数据为信息源,结合多层环境要素数据库、野外定点调查分析等数据,采用多要素综合分析的解译方法,通过人机交互式解译,综合判读并提取了20世纪80年代末期至2005年近15 a来新疆LUCC时空数据。从现状、动态变化等方面对LUCC信息进行定量和定性的分析,并运用土地利用动态度进一步说明了新疆的土地利用/土地覆盖变化。结果显示,新疆的耕地、林地、水域、建设地面积都有所增加,耕地的年变化率最大;未利用地面积有所减少,草地面积减少明显。

Based on the CBERS images during 2004--2005, the database of environmental factors, and the in situ investigation data, etc., the authors have extracted the change information of land use and cover （LUCC） in Xinjiang during these years by method of synthetic analysis and through man-machine interactive interpretation approach. The results are as follows： （1）during the period of 1990-2005 in Xinjiang, the areas of the farmland, the forest land, the waters and the urban areas, mining areas and rural residential areas were increased differently, but the areas of the unused land and the grassland were reduced, and the latter is obvious; （2）the change degree of the land use type-farmland is the biggest. The dynamics of land use in Xinjiang were mainly caused by the policies, the economic development and population growth, and the climate change and the agriculture advance in technology also influence the change of the LUCC.