Physical Causes of Drought

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Draught in terms of environmental problems can result in insect infestations, Increased erosion, habitats and landscape degradation and also low Air and water quality.

This article is about:


  1. The defination of Drought
  2. The physical causes of Drought.

Defination of drought.

Drought is a prolonged period of dryness or no rainfall than expected in a given area. This results in insufficient moisture in the soil, the drying up of water sources and vegetation.
 Drought is caused by physical and human factors which leads to hazardous situations.
The physical Causes of Drought are as follows.

Physical causes of Drought.

Below are 4 Physical causes of Drought.

1. Shift in the sub-Tropical high pressure belt: 

Which results to low rainfall. When high pressure shifts towards formerly humid areas, it inhibits rainfall formation. The dry period or season is then extended or prolonged.

2. Climatic change:
The rapid increase in the average temperature of the earth today (global warming) causes water loss via evaporation. In the absence of soil moisture little water vapour is sent to the atmosphere from which rain can fall. The dry period then lasts longer than expected.

3. The trade winds: 
Originating form the continental interiors of the horse latitude are sometimes too dry and affect weather conditions. This may cause the dry season to last longer than usual, leading to drought.

4. Effects of El Niño: 
It has already been noted that El Niño is an abnormal situation which involves a change in the direction of oceanic and atmospheric circulations which occasionally occur in the central and east Pacific Oceans around December. The effects of El nino spread worldwide due to tele-connections. This is atmospheric and ocean circulation carry the effects to other parts 0f the world.                                       
This are the causes of Drought but not the only causes. There also exists Human causes of Drought. If you wish to continue to the human causes of Drought simply click Read more. 
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