Meanders - Erosional and Depositional Landforms

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  • Created by: TomT254
  • Created on: 31-01-16 12:51
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  • Meanders
    • Meanders are formed as a result of erosion and deposition
      • They are large sweeping curves in a rivers middle and lower section
        • Meanders
          • Meanders are formed as a result of erosion and deposition
            • They are large sweeping curves in a rivers middle and lower section
            • 1. Meanders form where alternating pools (deep water and riffles) develop at equally space intervals.
              • Riffles = Areas of shallow water
              • Distance between the pools is 5-6 times the width of the river.
              • 2. Because the channel is deeper in the deep pools it is more efficient with greater energy and more erosive power. Energy is lost as the flows over a riffle because of friction.
            • 8. Ow lakes are formed when the neck of the loop of the meander is broken through often during flooding. deposition dams off the loop leaving an oxbow lake.
              • 7. The combination of erosion and deposition exaggerates the bends until large meanders are formed.
                • 6. This flow causes more erosion and deepens the pools, eroded material is also deposited on the inside of the next bend, where the river loses energy.
                  • 5. This causes a corkscrew-like current called a Helicoidal flow, which spiral from bank to bank.
                    • 4. Turbulence increases in and around the pools at the water speeds up, this makes the flow of the water twist and coil.
                      • 3. The spacing between the riffles and the pools causes the flow of the river to become uneven and maximum flow is concentrated on one side of the river.
                        • 2. Because the channel is deeper in the deep pools it is more efficient with greater energy and more erosive power. Energy is lost as the flows over a riffle because of friction.
      • 1. Meanders form where alternating pools (deep water and riffles) develop at equally space intervals.
        • Riffles = Areas of shallow water
        • Distance between the pools is 5-6 times the width of the river.
      • 8. Ow lakes are formed when the neck of the loop of the meander is broken through often during flooding. deposition dams off the loop leaving an oxbow lake.
        • 7. The combination of erosion and deposition exaggerates the bends until large meanders are formed.
          • 6. This flow causes more erosion and deepens the pools, eroded material is also deposited on the inside of the next bend, where the river loses energy.
            • 5. This causes a corkscrew-like current called a Helicoidal flow, which spiral from bank to bank.
              • 4. Turbulence increases in and around the pools at the water speeds up, this makes the flow of the water twist and coil.
                • 3. The spacing between the riffles and the pools causes the flow of the river to become uneven and maximum flow is concentrated on one side of the river.

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