Process of aeolian desertification and its control in Northern China
Aeolian desertification in Northern China is land degradation characterized by wind erosion in arid,semiarid and sub-humid regions mainly resulting from the excessive human activities on natural resources.With the development of economy and society,aeolian desertification/land degradation has exerted increasingly profound influences on natural environment and social development.The aeolian desertification mostly occurs in the interlacing agro-pastoral region,pastoral region,semiarid rain-fed cropland and oasis with irrigated cropland in Northern China and the whole situation of aeolian desertification comes to depravation as only part of the desertified land has been controlled.China,as one of the countries facing with severe desertification problems,has made some progresses in understanding and combating the process of aeolian desertification through many years of research.The results of remote sensing data analyses show that the there were 37.59 × 104 km2 of aeolian desertified lands in Northern China in 2010.The area of aeolian desertified land increased at the rate of 2256 km2 y-1 from1975 to 1990 to 3441 km2 y-1 from1990 to 2000.Since late 1990s,some national projects have been carried out,such as “Grain for Green and “Eco-reconstruction,which has achieved positive results and many aeolian desertified lands have been transformed to become farmland and rangeland.The remote sensing data analyses confirmed that the average annual rate of decreasing aeolian desertified land were 1635 km2 y-1 from 2000 to 2005 and 1114 km2 y-1 from 2005 to 2010.Based on existing experiences and research achievements,this paper briefly discusses the developmental processes,assessment and control mechanism of aeolian desertification in Northern China so as to provide some basic experiences for further studies and combating the aeolian desertification.
Tao Wang Xue Xian Yan Changzhen
Key Laboratory of Desert and Desertification,Chinese Academy of Sciences,Cold and Arid Regions Environmental and Engineering Research Institute,CAS,Lanzhou 730000,China
国际会议
The 11th International Conference on Development of Drylands(第十一届国际干旱区大会)
北京
英文
103-109
2013-03-18（万方平台首次上网日期，不代表论文的发表时间）