River basin Features

River Basin Features

  • source (start of river)
  • drainage basin (area where rain drains into)
  • confluence (two rivers meet)
  • tributaries (little rivers joins big river)
  • watershed ( boundary around the drainage basin)
  • channel (smaller river/ larger river)
  • mouth (opening into the sea at the end of the river)
  • sea or lake
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Drainage Basin

  • 1. Hydraulic action and Abraision wear away the soft rock and create a plunge pool.
  • 2. The harder Rock is undercut as the soft rock continues the be eroded. An overhang of hard rock forms
  • 3. When it becomes too large the overhang of the hard rock collapse. The debris continues to erode the plunge pool. The water fall starts to move backwards.
  • 4. Erosion continues in this pattern. The hard rock is undercut, making the plunge pool bigger, and when it collapses, the position of the falls moves back again
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Process of erosion

  • 1. TRACTION - where material is rolled along the river bed
  • 2. SALTATION- where material is bounced along the river bed
  • 3. SUSPENSION- where material is carried within the water colmn
  • 4. SOLUTION- where material is dissolved in the water


  • what vertical erosion does to a river- deeper
  • what lateral erosion does to a river- wider
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