2013
Q. 15
Set A
Geography
Indian Geography
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.
Smart Elimination
Recall that the Deccan Plateau tilts East. If the land sloped West, all rivers would flow West. Since only Narmada/Tapi do, it's an exception (Rift), not the rule (Slope). Eliminate 3.
Potential Trap
Statement 3 implies the general slope of the land causes the flow. The general peninsular slope is West to East. Narmada flows West *against* the slope because of the rift.
Answer Key & Explanation
Answer: AThe correct answer is Option A.
Analysis:
- Linear Rift Valley: Narmada flows through a rift valley created by faulting. This controls its course. (Correct)
- Between Vindhyas and Satpuras: It flows between these two mountain ranges. (Correct)
- Land Slope: The general slope of the Central Highlands/Peninsular plateau is from West to East (indicated by rivers like Mahanadi, Godavari). Narmada flows west not because the land slopes west, but because it is trapped in a fault (Rift). (Incorrect)
Value Addition
- Tapi: Another major west-flowing river in a rift valley.
- Estuaries: West-flowing rivers like Narmada form estuaries, not deltas, due to swift flow and lack of sediments.
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medium
Foundational question based on core concepts.