Geography Lesson 3

• what is the long profile

  shows how a rivers gradient changes from its source to its mouth
• upper course


  energy - low

  erosion - vertical

  transportation- low traction

  deposition- low

  velocity- low

  size of bed load- large eg. boulders

  size of channel- narrow
• middle course


  energy- medium

  erosion- vertical

  transportation- medium saltation

  deposition- medium

  velocity of river- medium

  size of bed load- medium eg sand

  size of channel- medium
• lower course


  energy- high

  erosion- lateral

  transportation- suspension

  deposition- high

  velocity of river- high

  size of bed load- small, slits and clays

  size of channel- wide and deep
• what is discharge


  the volume of water passing through a given point on the river and is measured in cubic metres per second (cumecs)