基于SRTM DEM与变点分析法的云南省富宁县地貌形态研究

Research on the Basic Morphological Types of Land Geomorphology in Funing County,Yunnan Province Based on the SRTM DEM and the Change Point Method

以位于云贵高原至广西丘陵倾斜面上的云南省富宁县为研究区，提出了适合研究区地形特点的地貌形态分类指标体系；基于 SRTM DEM 90 m 分辨率的地形数据，用均值变点分析法，确定8像元×8像元（0．5184 km^2）的格网为该县地形起伏度的最佳统计单元，据此提取了该县地形起伏度（0～707 m）；最后，叠加分析了该县绝对海拔和地形起伏度数据，得到12种基本地貌形态，并得出结论：小起伏较低山、小起伏中山是该县最主要的地貌形态。

Funing County of Yunnan Province , located between the transitional zone from Yunnan-Guizhou Plateau to Guangxi Hill area , based on the SRTM DEM 90m data, the mean change point was used to determine the best window for extracting the relief am -plitude of Funing County is 8 ×8 cells（0.518 4 km2 ）; by overlaying the classification of the elevation and the relief amplitude , twelve types of land geomorphology in Funing County were got , and the two major categories of the landform were the relatively low mountains with small relief , middle mountains with small relief , occupying 50%of the total area .Finally, the existing problems and further research were discussed .