The difference between an estuary and delta :
- When there are no distributaries of a river and it meets an ocean or a sea in a single line, then the lower course of the river is called an estuary.
- An estuary is formed in coastal areas of high tides an rift valleys.
- The coastal areas near estuaries are suitable for natural harbours.
- When a river meets an ocean or a sea with so many distributaries, they are forming a triangular shape due to silt deposits, is called a delta.
- A delta is formed in coastal areas having plains and visiting by low tides.
- Coastal areas having delta formations are good for agriculture and have artificial harbours.