近20年密云县土地利用变化的时空特征研究

Analysis of Spatial-temporal Characteristics of Land Use Change in Miyun County during the Last Twenty years

在RS和GIS技术的支持下,基于1988、1992、1996、2000、2004年Landsat遥感图像和2008年中巴地球资源卫星（CBERS）影像,对北京市密云县1988-2008年的土地利用信息进行提取,并计算了土地利用类型面积和转移矩阵,在此基础上定量分析了1988-2008年密云县土地利用变化的时空特征。结果表明,1988-2008年密云县城市化现象较为明显,土地利用类型中林地及耕地所占比重较大,未利用地变化最为显著,其次林地及耕地面积均有明显增加,水域面积有明显减少趋势,草地面积所占比例相对较少,面积变化不大。

Based on RS and GIS technology,the land use information of Miyun County from 1988 to 2008 was extracted using remote sensing TM data in 1988,1992,1996,2000,2004 and CBERS data in 2008.Then the area of land use types and conversion matrix were calculated.On this basis the spatial-temporal characteristics of land use change in Miyun County of Beijing were analyzed from 1988 to 2008.The results showed that the phenomenon of urbanization was evident from 1988 to 2008.The proportion of woodland and farmland were relatively large in all of the land-use types.The change of the unused land was the most remarkable.Secondly,the woodland and farmland were markedly increased.The water area had clear downtrend.Grassland accounted for a relatively small proportion and the area changed little.