Erosion is the process whereby the energy of the moving water in a river and the load it carries erode or remove materials such as rocks and soil from the bed and banks of the river.  

It is usually a slow and gradual process that occurs over the course of thousands or millions of years. However, the rate of erosion can be speeded up by human activities such as mining.

To learn more about the process of erosion, its effects, and its resultant features, click on the links below.