Why Do Rivers Curve

Description:  A meandering river is a great example of a phenomenon of water changing the shape of land. When it is surrounded by steep rock a river rarely curves but when it open up in large valleys it will weave back and forth. Water on the outside of the river will travel faster and erode the land more quickly. Eventually it will curve too much and lose speed. A stream table can be used to model a meandering river.

Web Resource: Meander - Wikipedia