The Sahal: Desertification
- Created by: Amy Woodhams
- Created on: 18-04-13 17:31
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- The Sahal: Desertification
- Location
- directly south of the Sahara desert
- northern Africa
- advancing up to 6km per year
- the desert is 3,000 miles long
- 10-15 cm of rain in July and August- 30 drought
- 8-9 months without rain
- turns land infertile and into sand
- 8-9 months without rain
- 10-15 cm of rain in July and August- 30 drought
- the desert is 3,000 miles long
- facts on desterts
- rainfall is confined to 1/2 months of the year
- a dessert is a piece of land that receives less then 250mm of rain per annum
- a drought is when an area receives less then the expected amount of rainfall, not low/no rainfall
- destertification is where an area is sperading
- rainfall is confined to 1/2 months of the year
- causes
- climate change
- rainfall levels decrease
- droughts more common
- no water
- vegetation dries up
- desserts form
- vegetation dries up
- rainfall levels decrease
- population growth
- birth rates increase
- high demand for supplies
- deforestation
- land prone to erosion
- deforestation
- high demand for supplies
- birth rates increase
- overgrazing
- livestock graze on land
- numbers increase
- too many animals, not enough grass
- cattle, goats & sheep
- numbers increase
- livestock graze on land
- climate change
- solutions
- built lines of stones to try and catch rainfall which is stored for crops
- most effective as the water is preserved and the wall is cheap and easy to install/ maintain
- benifits people and crops
- there is no limit on how people work
- so no money is lost
- there is no limit on how people work
- benifits people and crops
- most effective as the water is preserved and the wall is cheap and easy to install/ maintain
- built a green belt
- use drought tolerant animals like camels
- built lines of stones to try and catch rainfall which is stored for crops
- Location
- loss of vegetation causes land to become infertile and dry
- too many animals, not enough grass
- = Sand / desert
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