Desertification

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Desertification

  1. 1. Desertification IN THE SAHARA DESERT Next By: Zacharie Fortin
  2. 2. People named the part of the desert that borders onto land the Sahel because it is so hot. D i d y o u k n o w ? The Sahara is the hottest place in the world, temperatures can be over 30 °C (86 °F) during the day. During the summer temperatures can exceed 50 °C (120 °F). Back Next
  3. 3. Back Next CLIMATE <ul><li>Lower annual rainfall
  4. 4. Increasing temperature </li></ul><ul>Drought </ul>
  5. 5. Back Next HUMAN ACTIVITY <ul><li>Irrigation
  6. 6. Farming
  7. 7. Forests
  8. 8. Land use
  9. 9. Technologies
  10. 10. Policies </li></ul><ul><li>Poor practice
  11. 11. Over farming & slash burn
  12. 12. Deforestation & denuding
  13. 13. Building cities and roads
  14. 14. Harmful chemicals
  15. 15. Unsustainable </li></ul>
  16. 16. Back Next <ul><li>↑ Dust storms
  17. 17. ↑ E rosion
  18. 18. ↑ F loods
  19. 19. ↓ Soil fertility
  20. 20. ↓ N atural vegetation
  21. 21. ↓ A gricultural output </li></ul><ul><li>↑ H abitat loss
  22. 22. ↑ M igration
  23. 23. ↑ S tarvation
  24. 24. ↑ P overty
  25. 25. Crisis </li></ul>
  26. 26. Back What can be done? Next <ul>$Money$ to buy: <ul><li>Expert knowledge
  27. 27. Equipment to do it
  28. 28. Raw materials to make it with
  29. 29. Workers to do it </li></ul></ul><ul>No $, just what's on hand <ul><li>Everyday experience
  30. 30. Some ordinary tools
  31. 31. Some raw materials
  32. 32. Volunteers, farmers, citizens, aid workers </li></ul></ul><ul>Use ideas: old, new, borrowed, invented </ul><ul>Determination, a champion, commitment </ul>
  33. 33. 6 Projects in the Sahara to stop & fix desertification <ul>1. La Grande Muraille Verte, African Union CEN-SAD </ul><ul>Jacouba Sawadogo, local farmer </ul><ul>Geospatial Technologies </ul><ul>Sahara Forest Project by Bellona Foundation </ul><ul>Groasis by Aquapro </ul><ul>Magnus Larson, Architect </ul>Back Next
  34. 34. <ul>CEN-SAD African Union La Grande Muraille Verte Plant a forest </ul>Back Next
  35. 35. LA GRANDE MURAILLE VERTE Vision Plant a forest 15 km wide 7000 km long Install 1000s water retention basins along great green wall Problems Money is slow coming in Huge undertaking Labour intensive Many countries involved
  36. 36. <ul>Yacoubi Sawadogo Farming technique </ul>Back Next
  37. 37. TRADITIONAL TECHNIQUES Vision Local proven farming traditional techniques Zai Holes Stone Bunds One site at a time <ul>Problems Limited scope Intuition based, not scientific Slow implementation </ul>
  38. 38. <ul>Magnus Larson Dune sandstone walls </ul>Back Next
  39. 39. SAHARA FOREST PROJECT <ul>Vision </ul>High tech solutions Greenhouse Solar power farm Large scale implementation Commercially driven Problems <ul>Capital intensive </ul>Need investors Unproven concept
  40. 40. <ul>AquaPro Groasis tree starter </ul>Back Next
  41. 41. TREE STARTER Vision Simple plastic container to grow a tree Many trees will make a forest Forest will stop desertification Problems Small scope Requires maintenance Relatively expensive
  42. 42. Bacteria Teams of workers molds Sandstone Wall <ul>Magnus Larsson Dune sandstone walls </ul>Back Next
  43. 43. DUNE SANDSTONE WALLS Vision 6000 km wall to stop desertification Walls built by bacteria Walls provide housing and protection Problems Unproven idea Large scale and still expensive
  44. 44. Back Exit <ul><li>Early detection by monitoring </li></ul><ul><li>Early detection
  45. 45. Simulations
  46. 46. Assess the risk of desertification </li></ul>Anticipate and manage Back Next
  47. 47. Back Next PREVENTION TECHNIQUES <ul>Vision </ul>Anticipate and manage desertification using Geospatial technologies <ul><ul><li>Remote sensing
  48. 48. Aerial photography
  49. 49. GPS
  50. 50. Smart software
  51. 51. Experts </li></ul></ul>Problems More responding than preventing May require multiple solutions Only as good as your solution
  52. 52. CONCLUSION There are many promising solutions, but we have yet to see the outcome. Desertification in the Sahara is a massive problem in Africa.

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