基于RS与GIS的海南西部土地沙化/土地退化动态趋势研究

遥感和地理信息系统技术的发展为研究沙化／土地退化动态趋势变化提供了有效手段，以１９８７年和１９９８年的ＴＭ遥感资料为信息源，综合ＧＩＳ参与监督分类及目视读的方法，以ＧＩＳ为工具提取土地沙化／土地退化动态信息。结果表明海南省西部研究区土地沙化面积在减少，严重沙化区已基本得到整治，但由于对部分地区生态环境的保护不力，使得这些地区继续沙化同；同时，该研究区土地 化区明显的向着逆转的方向发展，但季雨林面积

Study on the Dynamic Change of Land Sand Desertion and Land Degradation in the West of Hainan Island Based on RS and GIS

RS is at present the primary and effective means of measurement to land sand desertion and land degradation. GIS provides an efficient tool to analyze the status and the changes of land sand desertion and land degradation. In the study, we use 1987 and 1998 TM Landsat data to construct at present map in the study area with the integration of visual interpretation and supervised classification with GIS. The result shows that the area of land sand desertion in the study area is decreasing and most of the grievous area has been harnessed. But the protection was of no avail to the eco enviroment of parts of area so that these area is still being sanded. At the same time, The area of land degradation is being improved towards the orientation of availing to the eco enviroment. But the season rain forest change comparatively less and the border is processing backward.