It’s made up of alluvium (deposited silt from a river flood).

Find out more about landforms in the lower course of the river.

Where the river flows into a sea or ocean it’s velocity is reduced leading to deposition. 

Find out more about river deposition.

Social costs of constructing dams and reservoirs include:

• the displacement of people due to flooding
• the loss of cultural heritage
• the resettlement of large numbers of people
• the health and well-being of affected populations both upstream and downstream

Find out more about hard engineering.

It becomes more rounded and smaller.

Find out more about river erosion.

The transportation of dissolved chemicals. This varies along the river depending on the presence of soluble rocks.

Find out more about how rivers transport material.