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Review key Brahmaputra & Indus River Systems: Basins, Gorges & Treaties exam facts and rate your mastery to track revision.
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#1
The Brahmaputra originates from Chemayungdung Glacier as the Yarlung Tsangpo, bends around Namcha Barwa, and forms Majuli island in the Assam Valley.
#2
Key tributaries of the Brahmaputra include the Subansiri, Kameng, Manas, Teesta on the north bank, and the Dibang, Lohit, and Dhansiri on the south bank.
#3
The Indus originates at the Bokhar Chu glacier in Tibet and flows across Ladakh before traversing Pakistan to discharge into the Arabian Sea.
#4
The five principal tributaries of the Indus are the Jhelum, Chenab (its largest tributary), Ravi, Beas (entirely in India), and Sutlej (originating at Rakas Lake).
#5
The Indus Waters Treaty of 1960 allocates the Eastern Rivers (Ravi, Beas, Sutlej) to India and the Western Rivers (Indus, Jhelum, Chenab) to Pakistan.
#6
The Brahmaputra enters Arunachal Pradesh near Gelling under the name Siang or Dihang, cutting through the eastern Himalayas via a 5,000-metre deep canyon.
#7
Majuli in Assam, bounded by the Brahmaputra to the south and the Kherkutia Xuti and Subansiri to the north, became India's first island district in 2016.
#8
The Teesta River originates from Tso Lhamo Lake in North Sikkim and flows through West Bengal before merging with the Jamuna (Brahmaputra) in Bangladesh.
#9
The Lohit River carries red alluvial soils that give the river its crimson coloration during floods, earning the Brahmaputra the title Red River of India.
#10
The Bhupen Hazarika Setu (Dhola-Sadiya Bridge), spanning 9.15 kilometres over the Lohit River, is India's longest water bridge, connecting Assam with Arunachal Pradesh.
#11
The Indus River flows between the Ladakh and Zaskar ranges in India, entering Pakistan near Chilas in the Gilgit-Baltistan region.
#12
The Jhelum originates from the spring at Verinag in Jammu and Kashmir, flows through Srinagar and Wular Lake, and joins the Chenab at Trimmu in Pakistan.
#13
The Chenab forms through the confluence of two headstreams, the Chandra and the Bhaga, near Tandi in the Lahaul and Spiti district of Himachal Pradesh.
#14
The Beas River originates at Beas Kund near the Rohtang Pass, meets the Sutlej at Harike Pattan in Punjab, where the Indira Gandhi Canal begins.
#15
The Indus Waters Treaty was brokered by the World Bank and signed on September 19, 1960, in Karachi by Prime Minister Jawaharlal Nehru and President Ayub Khan.
Subject Specialist Commentary
Analytical perspective & practical exam advice from the Master10 academic board
The Indus and Brahmaputra river systems represent two major trans-Himalayan waterways originating near Mount Kailash in southwestern Tibet. The Brahmaputra flows east as the Yarlung Tsangpo before bending around Namcha Barwa into Arunachal Pradesh, eventually forming Majuli, India's largest river island, in Assam. Meanwhile, the Indus flows northwest through Ladakh before traversing Pakistan to reach the Arabian Sea. Together, these rivers sustain fertile agricultural basins and are governed by important international water-sharing treaties.
Examiners in UPSC Prelims and SSC papers regularly test river origins and tributary bank alignments. For the Brahmaputra, remember that the Subansiri, Kameng, and Manas join from the north bank, while the Lohit and Dhansiri join from the south. A recurring question trap in Indus system questions involves flow paths: the Beas flows entirely within India, while the Chenab is the largest tributary. For exam revision, note that the 1960 Indus Waters Treaty assigns the Eastern Rivers—Ravi, Beas, and Sutlej—to India.
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