Fluvial Processes in TVC

1. Fluvial Processes II
A revision of Fluvial Processes,
Landforms and Characteristics

2. Fluvial Processes
• Rivers are driven by Gravity
and the water cycle
• They have elements, processes
and create landforms as
outputs.

3. Fluvial Processes
• Rivers Erode
• Rivers Transport
• Rivers Deposit

4. The Elements of the Process
• The Elements of fluvial
Processes are
• Gravity
• Water
• Sediment
• Topography

5. The Outputs of the Process
• The outputs of the processes
are landforms such as deltas,
V-shaped valleys, islands and
oxbow lakes.

6. How Rivers erode
• When a river is flowing fast it
has a lot of energy to erode the
bed and banks of its channel.
• This occurs in the upper
portions of the river.

7. How Rivers transport
• Rivers transport larger material
where they have the most
energy.
• Large sediment (rocks) require
a lot of energy to be moved.
Small sediment (ash) requires
little energy to be moved.

8. How Rivers Transport
• Sediment is moved…
• In Suspension (dissolved)
• By Saltating (bouncing)
• By Traction (rolling)

9. How Rivers Transport
• Rivers mainly transport in the
mid section of the river

10. At the base the river is wide
and slow

11. How Rivers Deposit
• Rivers deposit their load
(sediment) when they lose
energy.
• Where rivers flow slowly they
drop their sediment.

12. Where Rivers Deposit
• Rivers flow slowly at their
mouth in the lower section of
the river.
• Rivers flow slowly on the inside
of bends.

13. Characteristics of the River
• Text
Upper course
Narrow channel, fast
flowing
Mid Course
Medium channel, medium
speed
Lower Course
Wide Channel, Slow Velocity

14. Processes on the River
• Text
Erosion Dominates
Transport Dominates
Deposition Dominates

15. Erosion and Deposition
Fast = Erosion Slow = Deposition

16. Why the Channel Moves
• Text Channel moves this way
Outside of Bend
= Fast flow Inside of Bend
and Erosion = Slow Flow
And Deposition

17. Rivers at the mouth are wide
• Text

18. Rivers at the source are
narrow and fast

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