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)
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
