Sankosh
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Overview
The Sankosh rises in northern Bhutan and flows south into India, where it forms part of the boundary between Assam and West Bengal.
It joins the Brahmaputra in Bangladesh just after crossing the border. A large hydroelectric project on it in Bhutan has been planned with India's help.
Its valley marks the eastern edge of the Duars of north Bengal.
Geography and key facts
- Himalayan river from Bhutan
- Assam–West Bengal boundary
- Joins the Brahmaputra
- Proposed Sankosh hydro project in Bhutan
Why it matters for UPSC
India–Bhutan hydropower cooperation (Chukha, Tala, Punatsangchhu, Mangdechhu) is a GS-2 topic.
Note for UPSC
Forms part of the Assam–West Bengal boundary; flows from Bhutan.
Prelims asks about tributaries, the states a river flows through, its basin and the projects on it, so trace the course on the map.
Asked in PYQs
No question in our Prelims bank names Sankosh yet.
Key facts
- Type
- River
- States / UTs on its course
- West Bengal, Assam
- River system
- Himalayan
- Basin
- Brahmaputra
- Extent on map
- 26.3°–27.6°N, 89.8°–90.1°E
From the Map Explorer data; positions are for orientation.
In the lessons
- Physical Features and Drainage of India (map lesson)
- Drainage Systems of India: Himalayan and Peninsular Rivers (map lesson)
- The Harappan (Indus Valley) Civilisation (map lesson)
- Harappan Civilisation: Sites, Town Planning and Phases (map lesson)
- Mahajanapadas and the Rise of Magadha (map lesson)