Question

Describe the formation of flood plains and Deltas.
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Answer 1

Answer:

Flood plains are formed when a meander erodes side ways as it travels down stream. when a river breaks it's banks, it leaves behind layers of alluvium (silt) These are gradually build up to create the floor of the plain.

A delta is a triangular piece of land which is found at the mouth of a river. It is formed when a river deposits the sediments as it flow towards its mouth (a place where a river drain into a lake, sea or an ocean).

When a river reaches a lake or the sea towards the end of its journey, the water slows down and loses the power to carry sediment. The sediment is thus deposited at the mouth of the river. Some rivers deposits huge quantities of sediment which cannot be carried away by sea waves and tides. This results into the building up of layers forming a delta.

Explanation:

Answer 2

Answer:

Most floodplains are formed by deposition on the inside of river meanders and by overbank flow. Wherever the river meanders, the flowing water erodes the river bank on the outside of the meander, while sediments are simultaneously deposited in a point bar on the inside of the meander.