Development and Cause of Aeolian Desertification in Alpine Region-In Case of Maduo County in Yellow River Source Area
高寒草甸地区沙漠化发展过程及成因分析——以黄河源区玛多县为例

The results from remote sensor monitoring and field survey show that aeolian desertification process in the study area can be distributed into two stages: the developing stage from late 1980s to 2000,and the reversing stage form 2000 to 2006.Aeolian desertification area in the study area was 12 827.6 km2 in 1987,and reached up to 16 330.7 km2 in 2000 which occupied 64.7% of total area of the county,then dropped down to 12 977.2 km2 in 2006;Aeolian desertification in study area mainly results from climate warming which deteriorate the frozen soil and lead to the drought of topsoil,grassland degradation and rodent pesticide;human action has not dominantly resulted in the aeolian desertification,however,can control and reverse it effectively by some measures such as confirming livestock number according to the carry capacity of grassland,enclosing grassland and extinguishing rodents pesticide and so on.