Spatial Distribution Pattern and Natural Causes Analysis of Sandy Desertification Land in Ali Area

In order to explore the spatial distribution pattern and natural causes of sandy desertification land in Ali area, on basis clarifying dynamic change laws areas, degree pattern, main controlling factors are analyzed from three aspects landform, climate vegetation. During 22 years 1992 2014, area shows a law first increase then decrease, reaching peak 61,054.14 km2 2004, accounting for 20.57%, decreasing 60,892.65 20.51%, which do not return level 1992. Sandy is mainly slight moderate, 53.29% 45.73%, respectively, 2014. distributed among intermountain basins, river valleys, lake piedmont plains other landform units. The wind speed that determine is, coupled result sand source speed.