Which one of the following rivers is not a tributary of river Brahmaputra?
River Mahananda
Understanding Brahmaputra River Tributaries
The question asks us to identify which of the given rivers is not a tributary of the mighty Brahmaputra River. The Brahmaputra River is one of the major rivers of Asia, flowing through China, India, and Bangladesh. It has numerous tributaries that contribute to its large volume of water.
Analyzing the Options
Let's examine each river listed in the options to determine if it is a tributary of the Brahmaputra River:
- River Manas: The Manas River is a major river system in Bhutan and India. It flows through Bhutan and joins the Brahmaputra River in the state of Assam in India. Therefore, River Manas is a tributary of the Brahmaputra.
- River Kameng: The Kameng River is a tributary of the Brahmaputra River. It originates in Tawang district of Arunachal Pradesh and flows through the state, eventually joining the Brahmaputra River in Assam. So, River Kameng is a tributary of the Brahmaputra.
- River Mahananda: The Mahananda River is a transboundary river flowing through India, Nepal, and Bangladesh. It is a major river in North Bengal. The Mahananda River joins the River Ganges (Padma) near Godagari in Bangladesh. It is a tributary of the Ganges, not the Brahmaputra.
- River Subansiri: The Subansiri River is a trans-Himalayan river and is the largest tributary of the Brahmaputra River in India. It flows through Arunachal Pradesh and Assam and joins the Brahmaputra River. Thus, River Subansiri is a tributary of the Brahmaputra.
Identifying the Non-Tributary River
Based on the analysis of each river, we can see that River Manas, River Kameng, and River Subansiri are all tributaries of the Brahmaputra River. The River Mahananda, however, is a tributary of the Ganges River.
Therefore, the river that is not a tributary of the Brahmaputra River is the River Mahananda.
Summary of Tributaries
Here is a quick summary:
| River | Tributary of Brahmaputra? | Notes |
|---|---|---|
| Manas River | Yes | Joins in Assam |
| Kameng River | Yes | Joins in Assam |
| Mahananda River | No | Tributary of Ganges River |
| Subansiri River | Yes | Largest tributary of Brahmaputra in India |
Revision Table: Key Rivers and Their Connections
| River System | Key River | Example Tributaries |
|---|---|---|
| Brahmaputra River System | Brahmaputra | Manas, Kameng, Subansiri, Lohit, Dibang, Teesta (some consider Teesta a direct tributary, others say it joins before Brahmaputra meets Ganges) |
| Ganges River System | Ganges | Yamuna, Ghaghara, Gandak, Kosi, Son, Damodar, Mahananda |
Additional Information on Brahmaputra Tributaries
The Brahmaputra River has numerous tributaries flowing into it from the Himalayas and the hills to its north and south. These tributaries significantly increase the volume of water carried by the Brahmaputra, especially during the monsoon season.
Important left bank tributaries of Brahmaputra include Lohit, Dibang, Burhi Dihing, Desang, Dikhow, and Kopili.
Important right bank tributaries of Brahmaputra include Subansiri, Kameng, Manas, Sankosh, and Teesta.
Understanding the major tributaries of a river system is crucial for studying the geography and hydrology of a region.
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