Abstract:

This article breaks down the eolian sand movement into two parts from a geographic perspective for the first time, the inner core and the outer extension. The fluid start and the impact start of saltation are the two entities that constitute the inner core, and all transportation performance after the sand particle start can be defined as the outer extension. Drawing upon this innovative idea, this article carries out discussion on the root of how divergences arise between the two systems of theories, the eolian sand physics and the eolian sand geography. The results reveal that whether one is able to distinguish the different properties of the two entities of the inner core and whether one is able to understand the interaction mechanism correctly of the two entities lead to the formation of the cores of the two theoretical systems and are the root of many divergences. This article deepens the understanding towards the connotation of eolian sand movement and theoretically breaks through the long term leading core idea in the sand movement scholastic circle presented by Bagnold whose theory on the two types of sand particle start appreciates one and depreciates the other.

Key words: eolian sand movement theoretical system, eolian sand physics, eolian sand geography, the inner core of eolian sand movement