Rivers 2

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  • Created by: ychen485
  • Created on: 29-09-16 17:20
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  • Rivers
    • The Long Profile of a River
      • Upper Course
        • Gradient
          • steep
        • Depth of the river
          • shallow
        • Width of the river
          • narrow
        • Average speed of the water
          • slow
        • Discharge
          • low
        • Load size
          • big
      • Lower Course
        • Gradient
          • gentle
        • Depth of the river
          • deep
        • Width of the river
          • wide
        • Average speed of the water
          • fast
        • Discharge
          • high
        • Load size
          • mostly rounded
    • River Processes
      • Erosion
        • the wearing away of rock and soil found along the river bed and banks
          • it also involves the breaking down of the rock particles being carried downstream by the river
        • The four main forms of river erosion
          • Hydraulic Action
            • the force of the river against the banks can cause air to be trapped in cracks and crevices
              • the pressure weakens the banks and gradually wears it away
          • Abrasion
            • rocks carried along by the river wear down the river bed and banks
          • Attrition
            • rocks being carried by the river smash together and break into smaller, smoother and rounder paticles
          • Solution
            • soluble particles are dissolved into the river
      • Transport
        • rivers pick up and carry material as they flow downstream
        • The four different river transport processes
          • Solution
            • minerals are dissolved in the water and carried along in solution
          • Suspension
            • fine light material is carried along in the water
          • Saltation
            • small pebbles and stones are bounced along the river bed
          • Traction
            • large boulders and rocks are rolled along the river bed

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