Two catchments were selected as the objects of study on homogenous limestone and dolomite area in the center plateau of Guizhou Province.With TM data,the information of slope and rocky desertification were analyzed based on GIS.The result showed that rocky desertification of homogenous limestone region was more serious as a whole.But its intense rocky desertification was less than homogenous dolomite one.In homogenous limestone region light and moderate rocky desertifications focus on 15 to 35 degree slope,while intense rocky desertification focuses on above 25 degree slope.By contrast,the proportion of intense rocky desertification was higher in homogenous limestone region,and there was morehidden trouble in it through the distribution of potential rocky desertification shows.Human influences played an important role in the development of rocky desertification in catchments of homogenous dolomite regions.It was especially true for rocky desertification with a low slope.%在贵州省的黔中高原上选择连续性灰岩和连续性白云岩的2个小流域,利用TM遥感影像在GIS软件上提取石漠化及坡度信息进行分析.结果表明:灰岩流域的石漠化整体较严重,但强度石漠化状况要好于白云岩;其轻、中度石漠化集中在15～45°的坡度范围,强度石漠化在25°以上的坡度中高度集中.白云岩流域强度石漠化比例较高,其潜在石漠化的分布显示其生态环境存在着较大范围的隐患;流域中石漠化形成的人为作用明显,带有低坡度特征.
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