Question map
Consider the following tributaries of river Brahmaputra: 1. Lohit 2. Tista 3. Subansiri 4. Sankosh Arrange the above rivers from west to east:
Explanation
The Brahmaputra river flows from east to west through the Assam valley, receiving various tributaries. To arrange them from west to east, one must look at their confluence points along the river's course. The Tista is the westernmost right-bank tributary, originating near Kanchenjunga and joining the Brahmaputra in Bangladesh [2]. Moving eastward, the Sankosh river flows from Bhutan and joins the Brahmaputra near the Assam-West Bengal border [1]. Further east is the Subansiri, which originates in Tibet and joins the main river in the Upper Assam Plain [1]. Finally, the Lohit is one of the easternmost tributaries, entering India in eastern Arunachal Pradesh and joining the river near Sadiya [3]. Therefore, the correct west-to-east sequence is Tista (2), Sankosh (4), Subansiri (3), and Lohit (1), corresponding to the order 2-4-3-1.
Sources
- [2] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 3: The Drainage System of India > The Tista > p. 16
- [1] INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 3: Drainage System > The Brahmaputra System > p. 23
- [3] CONTEMPORARY INDIA-I ,Geography, Class IX . NCERT(Revised ed 2025) > Chapter 3: Drainage > The Brahmaputra River System > p. 20