Water on the land

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  • Created by: phibsxxx
  • Created on: 07-11-13 19:35
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  • Water on the land
    • Landforms resulting from:
      • Erosion
        • Waterfalls
          • 1.The water in a river channel flows over the more resistant rock and less resistant rock.
            • 2.Overtime, erosion by hydraulic action and abrasion erodes the less resistant rock, and splashback at the bottom creates a plunge pool which erodes backwards- eventually leaving an overhang of the more resistant rock.
              • 3.As the plunge pool erodes, the overhang eventually is no longer supported and falls into the plunge pool.
                • 4.This process is repeated and as it continues and gorge of recession remains.        Vertical cliffs with the river and is narrow and steep-sided.
                  • Gorges
        • Gorges
      • Erosion and deposition
        • Meanders
          • 1. As water flows down the river in a corkscrew motion from side to side- eventually a bend is created. The water flows fastest on the outside of the bend (thalweg). This causes the outside of the bend to erode even more-LATERAL EROSION!
            • 2. On the inside of the bend where the flow is gentle and slow, the river deposits. This forms a RIVER CLIFF.
        • Ox-bow lakes
          • 1.As meanders continue to erode the outside of a bend a swans neck forms.
            • 2.In times of flood when the river has more energy it erodes through the swans neck and forms a new channel. The water flows into the new channel leaving the meander as a MEANDER CUT-OFF.
              • 3.As the water stops flowing in the old meander, deposition will begin to separate it completely from the original river and it becomes separate- an ox-bow lake:)
      • Deposition
        • levees
        • floodplains
          • Untitled


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