"十二五"期间辽河流域的典型流域土地利用组成和变化分析研究

在遥感影像数据基础上,采用ERDAS和ArcGIS分析得出"十二五"期间清河、凡河和蒲河3个流域的土地利用组成及变化.结果表明:清河流域和凡河流域土地利用以林地为主,自然类型面积之和占流域总面积比例超过50%,蒲河流域则以耕地和建设用地等人工类型为主,面积之和占比超过80%;"十二五"期间各流域的土地利用类型均存在不同程度自然类型向人工类型转化的现象,清河流域变化最大,蒲河最小.

Analysis of Land Use Composition Change for Typical Basins of Liao River Basin from 2011 to 2015

The land use compositions and changes of Qing River basin, Fan River basin and Pu River basin were analyzed by using ERDAS and ArcGIS on the basis of Landsat TM images from year 2011 to 2015. The conclusions showed that forest was the main land use type for Qing River and Fan River, and has taken more than half part for both the two basins. Cultivated field and construction field were the main land use types for Pu River basin, and the areas of the two types together have taken more than 80% of the total area of the basin. For the three basins, the natural land use types have changed to artificial types at different de-grees during the study period.