Desertification Direction of the Northern Margin of Hobq Desert

The Hobq Desert, located in the northern Ordos Plateau is a typical in-situ desertification desert, which is quite different in characteristics and genesis from the Tengger Desert to the west and Muus Desert to the south. The northern margin of Hobq Desert is strictly constrained to the south bank of the Yellow River. This relationship between deserts and rivers indicates that desertification may cause passive migration of river channels（Fig, la）.