Kush geography

• Erosion


  • Can happen either vertically (downwards) or laterally (sideways)
• Hydraulic action


  The force of the water hitting the river bed and banks
• Abrasion


  When the load carried by the river repeatedly hits the bed or banks dislodging particles into the flow of the river
• Attrition


  When stones carried by the river knock against each other, gradually making the stones smaller and less rounded
• Solution


  When the river flows over limestone or chalk, the rock is slowly dissolved because it is soluble in mildly acidic river water
• River Profile
• River Drainage Basin
• Materials transported along the river bed

  • Traction - large boulders and rocks rolled along the river bed
  • Saltation - small pebbles and stones bounced along the river bed
  • Suspension - materials held up and carried within the river's flow
• Suspension


  Materials held up and carried within the river's flow
• Solution


  Minerals are dissolved in the water, a chemical change affecting rocks such as limestone and chalk
• Erosion processes
• The water cycle