Have you ever thought about how the wave-like sand dunes in the endless deserts are formed? One side is high and the other side is low… How do you think this beautiful image is created?
Of course, there is no human intervention in the formation of these shapes. The share of wind in these wave shapes is quite large.
Enter, Let’s give the details about the subject.
Wave-shaped sand dunes are formed by the effect of the force exerted by the wind on the sand grains on the ground.
Three different forces determine how a grain of sand will move under the influence of the wind. gravitational force, While it ensures that the sand grain remains fixed on the ground, it also ensures that the sand grains are dragged in the direction the wind blows.
In addition, the pressure difference that occurs as the wind moves on the surface of the sand grains, It causes a buoyant force to act on the grain. How high the sand grains will rise and how far they will be carried by the wind; Its shape, density and mass determine the speed of the wind.
For example, sand grains with high mass and density can only be dragged by rolling on the ground.
Some grains rise slightly due to the effect of buoyancy, remain in the air for a short time, and then fall back to the ground. Very small grains are transported to higher and longer distances.
These differences in the movement of particles are formation of unsymmetrical wave-shaped sand dunes causes. While one slope of these hills is steep, the slope of the other slope is low.
Essentially, these shapes It is also seen in smaller scale sand deposits called sand ripples. The height of these structures generally varies between 4-50 cm.
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