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In this lesson we are going to discuss about wind transportation in arid areas

Answer Text:
Wind Transportation
Factors Influencing Wind Transportation and Deposition
Wind velocity: when speed decreases strength also decreases and its ability to transport so wind starts to deposit materials.
a) Wind direction - Winds blowing from different direction converge and cause load to collide causing some of it to be deposited.
b) Nature of desert surface: - Wind transportation is more efficient on bare surfaces and hence less deposition there.
- Water surfaces such as oasis and moist surfaces impede transportation through friction causing wind to deposit materials.
- Less transportation on surfaces with vegetation as it reduces wind speed and also binds sand particles together.
c) Obstacles - Objects such as rock masses, land forms and vegetation block and reduce wind speed causing deposition.
d) Changes in weather conditions , such as sudden showers halts transportation and causes deposition by washing
down suspended materials.
e) Load - Heavy load is deposited before light load when wind energy decreases.
When many materials are transported by wind they collide causing each other to be deposited.

Processes/ Ways in Which Wind Transports Load
i) Suspension
- Wind lifting and holding particles such as dusts by air currents and transporting them over long distances.
ii) Saltation
- Wind transportation of heavy particles by a series of jumps and hops.
- They are rolled.
- They collide.
- Bounce and get lifted.
- Transported short distance ahead.
iii) Surface Creep
- Wind transportation of heavy particles such as gravel and pebbles by pushing and rolling along the desert.