THE REMOTE SENSING SURVEY AND THE ANALYSIS OF DEVELOPMENTAL TREND OF STONY DESERTIZATION FROM THE KARSTLAND IN THE SOUTHEAST OF CHONGQING
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摘要: 渝东南岩溶石山地区属石漠化多发地区。经遥感调查,石漠化遥感图斑共计173个,面积744.71km2,约占岩溶石山总面积的4.54%.石漠化的范围和程度与区域地貌、地质环境密切相关。石漠化严重或较严重地段都是人类生息和经济活动频繁的地区。20世纪60年代~80年代,区内石漠化范围变化不大;90年代以来,以封山育林、退耕还林,石漠化范围逐步缩小。Abstract: Stony desertization majority occurs in Chongqing southeast karst area.According to the remote sensing survey,there are all together 173 spots of stony desertization on the remote sensing image,which covers an area of 744.71 square kilometers,accounting for about 4.54% of the total area.The state and bound of stony desertization correlate closely with regional landform and geology condition.In the 1960s~1980s,there weren't much change of the scope of the stony desertization;and from the 1990s,through closing hillsides to facilitate afforestation and letting cultivated land revert to woodland,the scope now is gradually reduced.
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