Question

Where are delta formed

Answer 1

Delta is formed where the river meets with a sea or an ocean.

Answer 2

When a river reaches a lake or the sea the water slows down and loses the power to carry sediment . The sediment is dropped at the mouth of the river. Some rivers drop so much sediment that waves and tides can't carry it all away. It builds up in layers forming a delta.

Some deltas are so large that people can live on them. The Nile delta is a very important farming area in Egypt.