Question

why a delta is formed at the meeting point of sea water and river water

Answer 1

Deltas are landforms or wetlands that form at the mouth of rivers as they empty their water and sediment into another larger body of water, such as an ocean, sea, or lake, or even another river. ... This causes sediment, solid material carried downstream by currents, to fall to theriver bottom........
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Answer 2

The rivers bring with them a large amount of sediments , metals and other impurities with them.

They deposit these impurities and salts in their mouths which open Into the seas or oceans.

These areas usually are wet and contain lots of salts and sediments deposited on the land surface.

These places are often unsuitable for cultivation and the land is highly unstable.



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- Maheshwaran.