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Difficulty: MediumDrainage System and Water Resources of India

The Brahmaputra River system receives several prominent tributaries along its course through northeastern India. Among the following options, which river joins the Brahmaputra as a major left-bank tributary?

  1. Lohit RiverAnswer
  2. B
    Subansiri River
  3. C
    Kameng River
  4. D
    Manas River

Answer

The Lohit River is a major left-bank tributary of the Brahmaputra River system.
The Lohit River originates in the Tibet Autonomous Region (Kangri Karpo mountain range) and flows through Arunachal Pradesh into Assam, joining the Brahmaputra River at Sadiya from the left bank. Other prominent left-bank tributaries include the Dibang, Burhi Dihing, Dhansiri, and Kopili rivers.

Step-by-Step Solution

1
Identify the main course and flow direction of the Brahmaputra River in India.
The Brahmaputra flows westwards through Arunachal Pradesh and Assam.
Determining flow direction establishes which side corresponds to left-bank (south/east side) and right-bank (north side) tributaries.
2
Classify the given tributaries into left-bank and right-bank categories.
Subansiri, Kameng, and Manas join from the northern Himalayan slopes (right bank), while Lohit joins from the eastern mountains (left bank).
Accurate geographical classification distinguishes left-bank from right-bank rivers.

Key Concept

Tributaries and Bank Orientation of the Brahmaputra River System
Estimated Time:1m 0s
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Topics

Drainage System and Water Resources of India

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