A river changes the landscape that it flows through. It does this by:-

EROSION: Wearing away the soil and rocks. This puts lots of sand, mud, pebbles and silt into the river.

TRANSPORT: Moving material. The force of the flowing water moves the mud, sand, pebbles and silt created by erosion.

DEPOSITION: Dumping material. The sand, mud, pebbles and silt being transported by the river is eventually dropped. These processes of erosion, transport and deposition are directly linked to how much energy a river has.

The amount of energy a river has depends on how much water there is in the river channel and how fast it is flowing.