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soil erosion

soil erosion

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    Powerpoint presentation of jelmarie Powerpoint presentation of jelmarie Presentation Transcript

    • The Soil Erosion
      Jelmarie Cerillo Velacruz
      Ab English Language II
    • What is Soil Erosion?
      Loss and displacement of earths fertile topsoil
      Soil is naturally removed by the action of water or wind: such 'background' (or 'geological') soil erosion has been occurring for some 450 million years
    • Phisical Causes of Erosion
      wind
      By waterfall
      Both rainfall and runoff factors must be considered in assessing a water erosion problem. The impact of raindrops on the soil surface can break down soil aggregates and disperse the aggregate material.
    • Manifestation of Human ActsCausing Soil ERosion
      Deforestion
      Overgazing
      Over cropping
    • Principal Effect Of Soil Erosion
      Deterioration of agricultural lands.
      Increase of flood occurence.
      Reduce Water supply
      Sintatics of reservoirs canals and rivers.
      Destruction of blags roads, and public works.
      Depletion of wild life and other natural resources.
    • Activities Of Man
      Contributing to soil Erosion and disruption of earth surface
    • Agricultural Distturtion
      Logging
      Farming
    • Catle Ranching
      Hydroelectri desert
    • Urbanization
    • Disruption of Landscape
      Surface Mining
      Strip mining
    • Conclusion
      Because of continued advances in soil management and crop production technology that have maintained or increased yields in spite of soil erosion, others have not been aware of the increasing problem on farmland. Awareness usually occurs only when property is damaged and productive areas of soil are lost.
    • Additional Knowledge
      The implications of soil erosion extend beyond the removal of valuable topsoil. Crop emergence, growth and yield are directly affected through the loss of natural nutrients and applied fertilizers with the soil.
      Soil quality, structure, stability and texture can be affected by the loss of soil