Hydraulic Action - Sheer force of the water breaks rock particles away from the river channel.
Abrasion - Eroded rocks picked up by the river scrape and rub against the channel, wearing it away. Most erosion happens by abrasion.
Attrition - Eroded rocks picked up by the river smash into each other and break into smaller fragments. Their edges also get rounded off as they rub together.
Solution - River water dissolves some types of rock, e.g chalk and limestone.
(The faster a river's flowing, the more erosion happens)
Comments
No comments have yet been made