The Great Himalayan Rivers: Indus, Ganga, and Brahmaputra

The rivers of India are broadly divided into two major groups: The Peninsular Rivers (in South India) and the Himalayan Rivers (in North India). The Himalayan rivers are massive, powerful water bodies that have created the fertile northern plains, sustaining the lives of hundreds of millions of people.

Question (Click to Flip)

Are Himalayan rivers older or younger than Peninsular rivers?

Answer

Himalayan rivers are geologically much younger. The Peninsular rivers (like Godavari and Krishna) flow through ancient, hard rock plateaus and are millions of years older.

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Key Facts

The Ganga-Brahmaputra Delta (The Sundarbans) is the largest and fastest-growing river delta in the entire world. It is famous for the Royal Bengal Tiger.

The Indus Water Treaty of 1960 is an agreement between India and Pakistan that dictates exactly how much water from the Indus river system each country is legally allowed to use.

1. Why are Himalayan Rivers Special? (Features)

Perennial (Evergreen): Unlike southern rivers that dry up in summer, Himalayan rivers have water all 365 days of the year. This is because they get water from two sources: heavy monsoon rains in the summer, and the melting of massive Himalayan glaciers (ice) in the dry season.
V-Shaped Valleys: Because they fall from massive heights with extreme speed, they aggressively cut the mountains, forming deep, steep V-shaped valleys and massive waterfalls.
Delta Formation: When they finally reach the flat plains and the ocean, they slow down and deposit millions of tons of mud and silt, forming massive, fertile Deltas (like the Sundarbans).

2. The Indus River System

Origin: It rises in Tibet, near Lake Mansarovar.
Flow: It flows West, enters India in Ladakh, cuts through the mountains, and flows down through the entire length of Pakistan before emptying into the Arabian Sea.
Tributaries: Its five famous tributaries (which give 'Punjab' its name) are the Jhelum, Chenab, Ravi, Beas, and Sutlej.

3. The Ganga River System

Origin: It originates as the 'Bhagirathi' from the Gangotri Glacier in Uttarakhand. It officially becomes the 'Ganga' when it meets the Alaknanda river at Devprayag.
Flow: It is India's longest and most sacred river (2525 km). It flows eastwards through UP, Bihar, and West Bengal before entering Bangladesh.
Tributaries: The Yamuna (its largest tributary), Ghaghara, Gandak, Kosi, and Son.

4. The Brahmaputra River System

Origin: It also rises in Tibet near Lake Mansarovar (where it is called the Tsangpo).
Flow: It flows eastwards parallel to the Himalayas. It makes a sharp U-turn and enters India in Arunachal Pradesh, plunging down into Assam. It is a massive, wide river known for causing devastating floods in Assam every year.
Meeting point: In Bangladesh, the Ganga and Brahmaputra join together to form the mighty 'Meghna' river, flowing into the Bay of Bengal.

Questions and Answers

Are Himalayan rivers older or younger than Peninsular rivers?+

Himalayan rivers are geologically much **younger**. The Peninsular rivers (like Godavari and Krishna) flow through ancient, hard rock plateaus and are millions of years older.

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