THE REMOTE SENSING SURVEY AND THE ANALYSIS OF DEVELOPMENTAL TREND OF STONY DESERTIZATION FROM THE KARSTLAND IN THE SOUTHEAST OF CHONGQING

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.