以松华坝水源保护区为研究对象,通过解译Landsat TM遥感影像得到两期(1992年、2001年)1:10万土地利用图.基于GIS的叠加分析功能,建立了两个时期的土地利用类型转移矩阵.并结合DEM,定量研究了该区域近十年的土地利用/覆被的变化特征.研究结果表明:(1)该水源区土地利用类型以林地为主,其次是草地和耕地,这3类面积的总和达到了整个流域面积的86.40%以上.(2)1992年-2001年期间,土地利用类型转移以耕地、草地及未利用土地向林地的转换为主,其余各类土地类型面积均呈减少状态.(3)不同坡度等级土地利用的变化表现为:6°以上的坡耕地不断减少,尤其15°以上,减少幅度较大;坡度6°以下,耕地仍有小幅增长.各个坡度内的林地均有大幅度增长,特别是在6°以上的各坡度段,增长幅度较大.在2°-6°范围内和25°以上地区,园地面积有所增加.草地和未利用土地在各坡度段内均呈大幅度减少状态.%Songhuaba water source conservation region was chosen as the study area in this research.Based on the 1∶10,000 land use maps interpreted from the imageries of Landsat TM of 1992 and 2001, the conversion matrix of land use types in 1992 and 2001 was established through the overlay analysis functions of GIS, Combined the conversion matrix with DEM, the variation characteristics of LUCC are quantitatively studied from 1992 to 2001.The research results show that (1 )The top three land use types in Songhuaba water source conservation region are forest land, farm land and grass land.The total area of the three land use types accounts for over 86.4％ of the whole basin area.(2)The main changes of land use types in this area are from cultivated land grass land and no - use land to forest land during 1992 to 2001.The area of other types of land use decreased.(3 ) The study of LUCC in different slope indicate that the area of the cultivated land with slope less than 6° still increased a little, although it decreases gradually with slope greater than 6°, particularly over 15°, with which the area decreased much more.The area of forest land in every slope degree increased obviously, especially above the slope degree of 6°.The garden plots area slightly increased with slope range of 2° to 6°, and above 25 °o Contrarily, the area of grass land and no - use land in all the slope degree decreased.
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