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River erosion and transport
 

River erosion and transport

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    River erosion and transport River erosion and transport Presentation Transcript

    • River Processes
    • Roles of a river
      • Rivers have energy that means they can do work. The work they do is
      • I) Erosion
      • Ii) Transportation
      • Iii) Deposition
    •  
    • Types of river erosion
      • Corrosion/abrasion –the wearing away of the bed and bank by the load carried by a river.
      • Corrasion/solution – the removal of chemicals expecially calcium which causes rocks to dissolve.
      • Hydraulic action- the force of air and water on the sides of rivers and in cracks
      • Attrition - the wearing away of the load carried by a river to create smaller, rounder particles.
    •  
    • River Transportation
      • Saltation – process of river transport by which small particles bounce along the bed.
      • Solution – process of river transport by which material is carried dissolved in the water.
      • Suspension – process of river transport by which material is carried along within the water.
      • Traction – process of river transport by which material is rolled along the bed.
    •  
    •  
    • Deposition
      • Deposition – when a river loses energy and drops some or all of the material it is carrying.
      • Conditions under which rivers deposit material.