- Hydraulic action- The sheer force of flowing water washes away any loose material on the bed and banks.
- Abrasion (also known as corrasion) - stones carried in the river are washed onto the bed banks, wearing them away. Sometimes stones are trapped in a dip, where they swirl around and create potholes.
- Solution ( also known as corrosion)- The slightly acidic river water dissolves rocks made of calcium carbonate (CaC03).
- Attrition- stones collide together and are broken down becoming smaller and rounder.
- Traction- stones are rolled along the river bed by the force of the flowing water.
- Saltation- Small stones are bounced along the river bed by flowing water.
- Suspension- Particles ao silt and clay float and are carried along in the flowing water.
- Solution- Some minerals dissolve in the water. Limestone for example, slowly dissolves.
Deposition - If a river slows down because there is less water flowing in it, or the land is less steep, the river will have less energy to to carry its load. some of this material therefore will be dropped ( deposited ). Rivers slow down and deposits material on the inside of meander bends, in the shallow water when they reach the sea.
The Drainage Basin- A drainage basin ia an area of land drained by a river…