Other Rivers

1. With reference to river Teesta, consider the following statements: 1

With reference to river Teesta, consider the following statements:

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  • 1. The source of river Teesta is the same as that of Brahmaputra but it flows through Sikkim.
  • 2. River Rangeet originates in Sikkim and it is a tributary of river Teesta.
  • 3. River Teesta flows into Bay of Bengal on the border of India and Bangladesh.

Which of the statements given above is/are correct?

1 and 3 only
2 only
2 and 3 only
1, 2 and 3
This question was previously asked in
UPSC IAS – 2017
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Statement 2 is correct, while statements 1 and 3 are incorrect.
– Statement 1 is incorrect because the source of the river Teesta (Tso Lhamo Lake in Sikkim) is different from that of the Brahmaputra (Chemayungdung Glacier region in Tibet).
– Statement 2 is correct. The Rangeet River is a major tributary of the Teesta River, and it originates in Sikkim.
– Statement 3 is incorrect. The Teesta River flows through India (Sikkim, West Bengal) and then enters Bangladesh. In Bangladesh, it joins the Brahmaputra River (known as Jamuna in Bangladesh), and the combined flow then goes into the Padma River (main channel of the Ganges), eventually flowing into the Bay of Bengal. It does not flow into the Bay of Bengal directly on the border of India and Bangladesh.
The Teesta river dispute between India and Bangladesh is a significant issue concerning water sharing of the river.

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2. The Narmada river flows to the west, while most other large peninsular

The Narmada river flows to the west, while most other large peninsular rivers flow to the east. Why?

  • It occupies a linear rift valley.
  • It flows between the Vindhyas and the Satpuras.
  • The land slopes to the west from Central India.

Select the correct answer using the codes given below.

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1 only
2 and 3
1 and 3
None
This question was previously asked in
UPSC IAS – 2013
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The correct option is C, indicating that statements 1 and 3 explain why the Narmada river flows to the west.
– Statement 1 is correct. The Narmada river flows through a rift valley (a graben), which is a linear depression formed by faulting. This valley was created due to the subsidence of the landmass between the Vindhyan and Satpura ranges. Rivers flowing through rift valleys often follow the slope of the valley floor.
– Statement 2 is correct that it flows between the Vindhyas and the Satpuras, but this describes its location relative to mountain ranges which border the rift valley, rather than being the primary *reason* for its westward flow. The reason it flows *between* them is because that’s where the rift valley formed.
– Statement 3 is correct. The floor of the Narmada rift valley slopes towards the west. This westward slope dictates the direction of the river flow.
– The general slope of the Deccan Plateau is towards the east, which is why most major peninsular rivers like the Godavari, Krishna, and Cauvery flow eastward into the Bay of Bengal. However, the Narmada and Tapti rivers are exceptions because they flow through these distinct westward-sloping rift valleys.
Rift valleys are typically characterized by normal faulting and down-dropped blocks of land. The Narmada rift valley is a significant geological feature of peninsular India.

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3. Which one of the following rivers flows between Satpura and Vindhya ra

Which one of the following rivers flows between Satpura and Vindhya ranges ?

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Tapi
Sabarmati
Narmada
Mahi
This question was previously asked in
UPSC CAPF – 2016
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The Narmada River flows through a rift valley located between the Vindhya Range in the north and the Satpura Range in the south.
– The Narmada is one of the major west-flowing rivers in India, originating near Amarkantak in Madhya Pradesh and flowing through Madhya Pradesh, Maharashtra, and Gujarat before draining into the Arabian Sea.
– It flows through a fault or rift valley formed due to geological processes.
– The Tapi (Tapti) River also flows westwards through a rift valley, but it is located south of the Satpura Range.
– The Vindhya and Satpura ranges are prominent mountain ranges in central India, running roughly parallel to each other.
The Narmada rift valley is a significant geological feature. Unlike most major Indian rivers (like Ganga, Brahmaputra, Mahanadi, Godavari, Krishna, Cauvery) which flow eastwards into the Bay of Bengal, the Narmada, Tapi, and Mahi flow westwards into the Arabian Sea. This westward flow is attributed to the rift valleys they occupy.

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