1) Processes of river erosion (p100)
The sheer force of water hitting the bed and banks. Most
effective when large volumes of water are moving fast
This is the process by which the bed and banks are worn down by the
river’s load. The river throws these particles against the bed and
banks, sometimes at high velocity.
The load in the river repeatedly hits the river bed and banks,
causing material to break off.
This is the chemical action of river water. The acids in the water
slowly dissolve the bed and the banks.
Processes of river erosion
Vertical and Lateral erosion
• Vertical erosion
– This is when the river cuts down vertically into the
ground to create a V shaped valley. It is normally
in the upper course.
• Lateral erosion
– This is when the river erodes out laterally, across
the valley, creating a flat valley bottom. It is
normally in the lower course.
• When a river reaches its mouth the energy
levels drop. As a result any material that has
been carried by the river is deposited in an
• Normally the bigger, heavier particles are
deposited first as the river doesn’t have
enough energy to carry them any further
while the lighter, smaller particles are
• Choose one of the processes (erosion, transportation or
deposition) and produce a poem or a recipe about that
Erosion wears the river banks away,
The rocks are so brittle they easily
Always flowing and carrying the
Hydraulic action causes the rocks to
Erosion: Take soluble
minerals as river flows and
dissolve them to make
Transportation: Pick up a
handful of rocks and throw
them so they skip along the