As a river moves from source to the sea, it transports its load:
1. Traction
- Large pebbles and stones are rolled and dragged along the river bed by the force of the water known as traction.
2. Saltation
- Small pebbles are bounced along the river bed. This method is known as saltation.
3. Suspension
- Tiny particles are held in suspension in the water, the movement of water is fast enough to keep them from dropping to the river bed.
4. Solution
- Dissolved minerals like limestone are carried in solution, it cannot be seen.