What are Perennial and Non-Perennial Rivers?

By Shivank Goel|Updated : September 5th, 2022

Perennial rivers are streams or rivers that run constantly across their riverbed for a whole year. The entire year, there is water in the riverbed there. Non-perennial rivers are rivers or streams that do not flow continuously throughout the entire year. For at least a portion of the year, they don't flow.

Perennial and Non-Perennial Rivers

Streams or rivers that continuously flow across their riverbed for an entire year are known as perennial rivers. Water is present in the riverbed there throughout the entire year.

Examples of Perennial Rivers: Brahmaputra, Ganges, Indus, etc.

Non-perennial rivers are those that do not flow continuously year-round. They don't flow for at least a part of the year.

Examples of Non-Perennial Rivers: Pennar river, Mahanadi, Krishna river, Narmada river, etc.

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  • Perennial rivers are those that display a constant flow of water throughout the year, with the exception of periods of great drought. Indus, Ganges, and Brahmaputra, as examples. Rivers that are not perennial are ones that are dry for at least a portion of the year. Mahanadi, Krishna, Narmada, Tapho, and Godavari are other examples.

  • The Ganga is the most important perennial river originating from Gangotri in the snow-bound Himalayas about 3,900 m above mean sea level.

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