Geography

The force of water against the beds and banks of a river.

Acids in the water dissolve the bed and banks of the river.

Material carried by the water 'bump' into each other and break down into smaller particles.

The river throws it's load against the river bed, resulting in erosion of the bed.

Bouders and pebbles are rolled along the river bed at times of high discharge.

Sand sized particles are bounced along the river bed by the flow of water.

Fine clay and sand particles are carried along within the water even at low discharge.

Some minerals dissolve in the water, such as Calcium Carbonate. This requires very little energy.

A meander is made due to erosion in the outer bend (due to the high velocity of the water) of a river and deposition on the inner bend, creating a wave like shape.

Vertical erosion
Lakes
Waterfalls
Rapids
Gorges