Land Degradation and Soil Erosion
Degraded Land – resulting in reduced productivity
~ 5 billion ha (@ 43% of Earth’s vegetated surface)
~ @ 1/3 due to overg...
Soil Erosion
Process 1. Rain drop detachment
2. Transport (overland flow or runoff)
3. Deposition
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
Soil erosion
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Soil erosion

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Soil erosion

  1. 1. Land Degradation and Soil Erosion
  2. 2. Degraded Land – resulting in reduced productivity ~ 5 billion ha (@ 43% of Earth’s vegetated surface) ~ @ 1/3 due to overgrazing ~ 3.6 billion ha associated with desertification ~ a major cause is overgrazing ~ 0.5 billion ha due to tree felling in humid tropics Soil degradation is greatly responsible for @ 2 billion ha of the 5 billion ha @ 85% of this is due to wind & water erosion
  3. 3. Soil Erosion
  4. 4. Process 1. Rain drop detachment 2. Transport (overland flow or runoff) 3. Deposition

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