基于Landsat影像赛罕乌拉国家级自然保护区土地利用变化研究

RESEARCH ON LAND USE CHANGE IN SAIHANWULA NATIONAL NATURE RESERVE BASED ON LANDSAT IMAGE

遥感影像分类技术可以快速获取土地利用信息。选择赛罕乌拉国家级自然保护区作为研究区,以1995年、2006年Landsat-5 TM影像和2014年Landsat-8 OLI影像为数据源。使用ENVI 5.1软件对三期的遥感影像进行预处理,监督分类,通过人工目视解译与计算机自动提取相结合的手段,获取赛罕乌拉国家级自然保护区土地利用分类数据,对分类的土地利用类型进行数理统计和比较分析。结果表明:1995年—2014年,研究区土地利用有明显的变化,但土地利用结构变化不大。林地、草地所占面积相对较高,耕地、裸地的面积逐渐减少。单一土地利用动态度在-2.61%~5.05%之间,1995年—2006年、2006年—2014年综合土地利用动态度分别为0.36%、0.23%。

Remote sensing image classification technology can quickly acquire land use information.The Saihanula national nature reserve was selected as the research area,the Landsat-5 TM images in 1995 and 2006,and the Landsat-8 OLI images in 2014 were used as the data sources.The ENVI 5.1 software was used to preprocess and supervise the classification of the remote sensing images in the third phase.Through the combination of manual visual interpretation and computer automatic extraction,the land use classification data of the Sihanwula national nature reserve was obtained,and the classified land use types were statistically analyzed and compared.The results showed that,from 1995 to 2014,the land use in the study area had changed obviously,but the land use structure did not change much.The area occupied by the woodland and the grassland was relatively large,while the areas of cultivated lands and bare lands decreased gradually.The single dynamic attitude of land use varied from-2.61%to 5.05%,and that of the comprehensive land use from 1995 to 2006,from 2006 to 2014,was 0.36%and 0.23%,respectively.