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Desertification. Eleanor McKnight, Nicole Petry , M arquis D ixon, Steven Cao . What is it?. A land slowly becoming a desert, usually due to human causes. Causes of Desertification. Overgrazing -People fence their animals, causing less space and more animals in one area.

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desertification

Desertification

Eleanor McKnight, Nicole Petry, Marquis Dixon, Steven Cao

what is it
What is it?

A land slowly becoming a desert, usually due to human causes

causes of desertification

Causes of Desertification

Overgrazing

-People fence their animals, causing less space and more animals in one area.

-People have a steady supply of food so they do not need to move as much to get resulting in overgrazing.

drought

Extended periods of time with less than normal rainfall. It damages vegetation.

Drought

War

War causes refugees to move into marginal land. Because of this the new fresh land is destroyed.

destruction of plants in dry region
Destruction of Plants in Dry Region

People cut down trees to use them as fuel. Then, there is nothing left to protect the soil.

A solution is to let average land replenish before farming

slide6

-Farmers clear average land and use it, taking way the richness of soil. By letting average land replenish before farming with can prevent this.

Farming of Average Land

soil being less usable
Soil being less usable
  • The soil can be blown away by wind or washed away by rain.
  • Nutrients in the soil can be removed by wind or water.
  • Salt can build up in the soil which makes it harder for plant growth
people near affected areas
People near affected areas
  • Desertification can cause flooding, poor water quality, dust storm and pollution.
  • All of these effects hurt people living near affected region
vegetation is lacked or damaged
Vegetation is lacked or damaged
  • Loosened soiled may bury plants or leave their roots exposed.
  • Also when overgrazing occurs, plants species may be lost.
  • Drought and poor land

management contribute

to famine.

  • If the Population is growing,

this will cause economic problems and starvation

short term effects of desertification in sahel
Short term effects of Desertificationin Sahel
  • Soil loses its nutrients which makes it not useful
  • Overgrazing destroys vegetation and without it erosion occurs
  • Land becomes salty which

makes it difficult to grow

crops

Map of Sahel

long term effects of desertification in sahel
Long term effects of Desertificationin Sahel
  • People die of starvation
  • Cattle die of starvation
  • The soil becomes completely useless
solutions
Solutions
  • Water Conservation
    • Through irrigation systems, water can easily access the wildlife
  • Planting shrubs and trees
  • “San d Fences”
        • Fences of wood that move

the sand into another area

        • They help stop the

accumulation of a desert

  • Set regulations on ff- road vehicles
preventing desertification
Preventing Desertification

Soil erosion must be prevented, which can be done by placing boulders and/or planting plants.

Overgrazing of plants are damaging to the ecosystem and must be addressed.

other notes
Other Notes

Water is absolutely necessary in order to green a desert and combat desertification. Careful irrigation is essential.

It is almost always best that the local people combat desertification in their own areas as to be more efficient and less costly.

People need to be given some kind of benefit for combating desertification.

china s great green wall
China’s “Great Green Wall”
  • Largest tree-planting program of its kind in the world.
  • The “Wall” will get to 5,700 km by 2050
    • 400million hectacres
    • 42% of China’s

landmass

bibliography
Bibliography
  • http://pubs.usgs.gov/gip/deserts/desertification/
  • http://www.guardian.co.uk/environment/2010/sep/23/china-great-green-wall-climate
  • http://desertification101.tripod.com/id8.html
  • scalloway.org.uk/phye4.htm
  • desertification.tripod.com/id3.html
  • http://pubs.usgs.gov/gip/deserts/desertification/
  • http://www.greenfacts.org/en/desertification/index.htm\
  • http://www.botany.uwc.ac.za/envfacts/facts/desertification.htm
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