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Question 27 of 131 · Rivers, Lakes & Dams of India
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In Bangladesh, the main channel of the Brahmaputra river is called the:

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Answer: Option D — Jamuna

Detailed Solution

After entering Bangladesh, the main channel of the Brahmaputra is called the Jamuna. (It should not be confused with the Yamuna of India, which is sometimes also spelt Jamuna.)

Course in Bangladesh:

  • The Brahmaputra enters Bangladesh from Assam near Dhubri.
  • In Bangladesh, the main channel flows south as the Jamuna, a wide, braided river with many sandbars and islands called "chars".
  • An older course of the river, flowing farther east, is still called the Old Brahmaputra.

Confluences in Bangladesh:

  • The Jamuna joins the Padma (the name of the Ganga in Bangladesh) near Goalundo.
  • The combined river, still called the Padma, is joined by the Meghna near Chandpur.
  • The united river then flows into the Bay of Bengal under the name Meghna.

Bridges over the Jamuna and Padma:

  • The Bangabandhu (Jamuna) Multipurpose Bridge, about 4.8 km long, opened in 1998 and links eastern and western Bangladesh.
  • The Padma Bridge, about 6.15 km long, opened in 2022 and is the longest bridge in Bangladesh.

Importance of the rivers:

  • They provide water for agriculture, fisheries and transport.
  • But they also cause severe floods, riverbank erosion and loss of land, and the frequent shifting of channels displaces many people every year.

The Brahmaputra's total course:

  • Tibet: Tsangpo.
  • Arunachal Pradesh: Siang or Dihang.
  • Assam: Brahmaputra.
  • Bangladesh: Jamuna (main channel).
  • Total length: about 2,900 km.

Why not the other options?

  • ✗Padma is the name of the Ganga in Bangladesh.
  • ✗Meghna is the name of the combined river near its mouth and of a river from the north-east.
  • ✗Surma is a river of north-eastern Bangladesh, linked to the Barak river system of India.

Quick tip

Remember: In Bangladesh: Brahmaputra = Jamuna; Ganga = Padma; combined river near the sea = Meghna.

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Rivers, Lakes & Dams of India — Preparation

This question tests your understanding of Rivers, Lakes & Dams of India, a key topic in the General Knowledge section. The detailed solution above uses a step-by-step approach to show the reasoning, and where available, a shortcut that helps you solve similar questions in under 90 seconds during the actual exam.

This topic covers India's drainage system: the Himalayan rivers (the Indus, Ganga and Brahmaputra systems), the peninsular rivers (Godavari, Krishna, Kaveri, Narmada, Tapi and Mahanadi), their tributaries and origins, waterfalls, lakes, and the major dams and multipurpose river projects. Exams ask about the origin of a river, its tributaries, the cities on its banks, and the river on which a dam is built. For example, the Bhakra Nangal Dam is on the Sutlej, the Hirakud Dam on the Mahanadi, and the Sardar Sarovar Dam on the Narmada. Remember that the Narmada and Tapi flow west into the Arabian Sea, while most peninsular rivers flow east. Practise the rivers, lakes and dams of India questions below, written in the style of the general awareness sections of exams such as SSC, banking, railways, CUET GAT, MAH CET and CLAT. Each question comes with a detailed explanation that adds related facts, so every question helps you revise more than one point.

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