DUNE FORMATION

In order to research the desert behaviour the difference in dune formation strategies were explored. There is a direct relationship between wind direction, speed and sand supply to generate specific type of the dune. The behaviour of sand dunes in the desert is significantly affected by the wind’s direction in seasonal changes. The formation of dunes is indicated by the influence of winds regimes. Morphologies of the sand dunes are divided into five major types based on the directionality of the on-site wind effect.

The energy carried by the wind force in the desert plays an important role in the transformation and accumulation of the huge amount of sand. For instance, the formation of Barchans dunes requires continual wind supply from one direction. The character of Longitudinal dunes has ridges that are caused by parallel wind directions carrying limited sand supply within one direction. On the other hand, Star dunes are formed by wind force from various directions during seasons of a year. Dune behaviour and formation are strongly affected by on-site conditions: wind force, temperature, and solid terrain.