【摘要】 选择以连续性灰岩、白云岩为基底的,不同地貌区域的小流域为研究对象,通过遥感数据源提取其石漠化信息,对不同地貌区中石漠化分布的岩性差异进行分析。结果表明灰岩小流域的生态环境对地貌区变化敏感,随着高原区到峡谷区的过渡,石漠化发生愈频繁兼强度加大;白云岩小流域中斜坡区石漠化景观发生频率高且强度大,峡谷区石漠化面积虽大但不严重,高原区生态环境最优。在石漠化小流域恢复中提出了以空间地域分异为指导的分级治理原则。首先以岩性作为分级指标,灰岩优先于白云岩地区。灰岩地区中以高原区为生态恢复的首选,其次是峡谷区。白云岩的斜坡区是治理重点,高原区随后。更多还原

【Abstract】 The information about rocky desertification was developed from the remote sensing data.Six catchments in different landform areas were chosen to analyze the differences in rocky desertification intensity among different rock types.The results showed that ecological environments of the catchments are sensitive to variations in regional geomorphology in homogenous limestone regions and the frequency of desertification is higher and the intensity is enhanced with changes in physiognomy from a plateau region to a valley one.By contrast,desertification areas in the catchments of homogenous dolomite regions are vast and severe,those in valleys are vast but not severe,and those in plateau areas have the best ecological environments.Based on the results,the author suggests that spatial territorial differences should be regarded as a top-priority in the restoration of catchments in the desertified regions.In the first place,the homogenous dolomite region is prior to the homogenous limestone one which is classified in terms of its lithology;secondly,the plateau region is prior to the valley region in homogenous limestone regions;and by contrast,the slope region is prior to the plateau one in homogenous dolomite regions.更多还原