a)Sahara
- Kalahari
- Namib
b)Saltation
It is where coarse grained sand particles are transported through a series of bouncing /
jumping along the surface.
Suspension
It is where very fine material is picked by wind raised high and blown over long
distances
Surface creep/rolling
It is where large / heavy material are rolled and pushed forward by wind along the
surface
c)It develops in arid areas when sand accumulates around an obstacles that lies in the
path of the wind.
- The gradual accumulation of sand forms a hill.
- Eddy currents on the leeward side of the dune causes the formation of a shallow
depression / concave slope / steep slope.
- With time the prevailing wind forces the sand at the edge of the dune to move forward
forming the horns.
- The continuous extension extension of the horns lead to a crescent shaped feature
called barchan
d)Desert features form good sites for tourist attraction, thereby earning foreign
exchange.
- Wind deflation hollows/oasis are sources of water for domestic /agricultural use.
- Wind deposited sands / loess form fertile plains for farming.
- Salty flats are economically used for salt production.
- Shifting sand dunes/hinder transport activities.
- Desert sceneries are ideal for film making.
- The vast sand seas are ideal for military training/nuclear testing.
Githiari answered the question on September 15, 2017 at 18:37
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