(a) (i) Name two major deserts found in Africa. The diagram below represents features resulting from wind erosion in a desert. Use it to answer question a(ii). (ii) Name the features marked U and V. (b) Describe the three processes through which wind tr

Name two major deserts found in Africa.

4/2/2021

KCSE Geography Paper 1 2013 Section B Question 10.

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.

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.

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.