Wind
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Wind , Wind erosion, Wind transportation, Wind deposition

Wind , Wind erosion, Wind transportation, Wind deposition

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Transcript

  • 1. Wind
    Geography
    Standard: VIII
  • 2. Created by,
    M.Kohila, M.A. M.Phil., B.A.(Eng),B.Ed.,B.A.(His)
    S.M.R.V.H.S.S.,
    VADASERY,
    NAGERCOIL,
    KANYAKUMARI DISTRICT,
    TAMILNADU,
    INDIA
  • 3. LEARNING OBJECTIVES
    Knows that wind is relatively insignificant erosional agent.
    Learns about the causes for sand storms and dust storms.
    Undersands the formation of sand dunes.
  • 4. Content
  • 5. Wind
    Air that moves across the earth’s surface is called wind.
  • 6. Wind erosion
    • Wind erosion is effective in arid and semiarid areas.
    • 7. In humid places moisture bind particles together and vegetation anchor the soil .
    • 8. So wind erosion is negligible.
    • 9. For, wind to be effective ,dryness and scandyvegeation are prerequisites.
    • 10. Wind may pick up, transport, and deposit.
  • Works of wind
    Wind works in two ways to erode the materials.
    They are a. By deflation and 2. by abration
    Blow out
    By deflation -
    By Abration - Ventifacts
    புடைத்தெடுத்தல் - ஊதுபள்ளங்கள்
    உராய்ந்துதேய்த்தல்-பட்டைக்கற்கள்
  • 11. Bed Loads
    Sand Storm
    Dust storm
    Barchan dune
  • 12.
  • 13. Longitudinal dune
    Transverse dune
    Loess
  • 14. Loess and yellow river in China
    Desert in central Asia
  • 15. Wind Erosion – Land forms
  • 16.
  • 17. The end