Assessment of sandy desertification trends in the Shule River Basin from 1978 to 2010

查看全文 作　　者：Xiang [1]Song;ChangZhen [1]Yan;Sen [1]Li;JiaLi [1]Xie

机构地区：[1]Key Laboratory of Desert and Desertification,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences

出　　处：《Research in Cold and Arid Regions》索引2014年第6卷第1期,共7页

基　　金：supported by the China National Key Basic Research Program(No.2009CB421301) 摘　　要：Sandy desertification in the Shule River Basin has expanded dramatically during the past 30 years.We evaluated the status,evolution,and main causes of sandy desertification by interpreting Landsat images which were acquired in 1978,1990,2000,2005,and 2010,and analyzing the relevant meteorological data.The results show there was 3,477.95 km2,3,733.32 km2,3,620.29 km2,3,565.65 km2,and 3,557.88 km2of sandy desertified land in 1978,1990,2000,2005,and 2010,respectively.From 1978 to 1990,not only the area of sandy desertified land(SDL)but also the degree of SDL levels increased.From 1990 to 2010 there was widespread restoration of SDL but the recovery trend of SDL gradually slowed.Although climate change contributes to expanding sandy desertification,human activities can either accelerate or reverse trends of natural sandy desertification.Some detrimental human activities can accelerate sandy desertification,but,conversely,desertification control measures such as the Three-North Shelter Forest Project and watershed rehabilitation programs in areas including the Shule River Basin resulted in many SDL being turned into grasslands or forest lands when shrubs and trees were planted to fix mobile sands at the edges of oases and cities.With population growth,much SDL has been reclaimed as farm land using water-saving agricultural methods or has been turned into built-up land as a result of urbanization. 关键词：疏勒河流域沙质荒漠化评估三北防护林工程沙化土地农业生产方式人类活动 SDL

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Assessment of sandy desertification trends in the Shule River Basin from 1978 to 2010

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