# Explain how a delta is formed

Source: https://projectgcse.co.uk/geography/water/how_a_delta_is_formed

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- Deltas are formed at the end of rivers (river mouth) as it flows into the sea
- Rivers carry a lot of sediment (mud)
- The river flows into a calm sea
- This slows the river down
- Which makes the river drop its sediment
- This deposited sediment builds up over years creating a delta
- The river is forced to split up
- The smaller rivers made by deltas are called distributaries
- Examples of Deltas are Nile Delta, Ganges Delta