sentence: Water flows at different speeds at different parts of the river.
sentences_after: At the banks, the water flows slowest. When the river bends, water flows faster on the outside of the bend than the inside. The fast water on the outside 'erodes' the outside of the bend. This means it breaks bits of the bank off. Together, these make the bend move in the direction of the outside of the bend.
concept_name: water
headings: Oxbow lake Why does this happen?
categories: Lakes