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UPSC Prelims 1991 · World Geography · Countries, Rivers and Resources
Swamps are seen in the Siberian rivers because
- (a) Freezing of the river near the mouth prevents water to flow to the sea
- (b) Rivers are too narrow
- (c) Rivers are heavily drained by the large network of canals
- (d) Railway bridges built across the rivers obstruct the flow
Show the answer and explanation
Answer: (a) Freezing of the river near the mouth prevents water to flow to the sea
The rivers flow north; their mouths freeze while upper courses thaw, so water floods the land into swamps.
The trap
None.
🔒 Ob, Yenisei, Lena: north-flowing, ice-jam flooding.
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