Cross profile(valleys)

• Cross profile: Shows how river valleys change downstream
• Upper course:

  • Valley: Steep-sided, V-shaped
  • River: Narrow, shallow, turbulent
• Middle course:

  • Valley: Wider, flat floor
  • River: Wider, deeper
• Lower course:

  • Valley: Very wide, flat
  • River: Wide, deep, with large sediment load (levees)
• Changes happen across the croos profile due to channel erosion, weathering and mass movement