Forms of erosion
Hydraulic Action - The action of water against rock (water crashes into gaps in the soil and rock, compressing the air and forcing particles apart).
Abrasion - The action of rocks being picked up by the water and smashed against the river banks.
Attrition - The action of rocks being carried by the river and smashed into each other making them smaller more rounded.
Corrosion - Minerals (such as CaCO3) are dissolved in the river water.
Solution - Soluble minerals (e.g. CaCO3) are dissolved in the river water and transported downstream.
Suspension - Small particulates (e.g. clay & silt) are carried downstream by slow flowing water.
Saltation - Sand and small gravel bounces and skips across the surface of the water on fast flowing rivers.
Traction - Larger gravel, cobbles and boulders roll along the river bed on high energy rivers (usually only occurs during a flood).
- Erosion occurs on the outside of the river meander as that is where the river is flowing fastest.
- Deposition occurs on the inside of the river meander as that is where the river is flowing slowest.
- The river is deepest on the outside of the meander.
- Sediment is found on the inside of the meander where it is deposited.