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Why do many small streams disappear from the surface in Bhabar?

Answer and explanation

Correct answer: Because water seeps through pebbly porous deposits

The direct answer is C, water seeping through pebbly porous deposits. Bhabar is a narrow belt along the foothills of the Himalayas. Rivers coming down from the mountains deposit large pebbles, stones, and coarse sediments there. Step by step: the streams reach the coarse deposit; the spaces between pebbles are large and connected; water enters these spaces and moves downward; therefore, many small streams disappear from the visible surface. Option C is correct because the deposits are highly porous and permeable. Option A is wrong because heavy snowfall may feed rivers but does not explain their disappearance into Bhabar deposits. Option B is wrong because Bhabar is inland and sea waves do not cause this process. Option D is wrong because melting lava is unrelated to the alluvial, pebble-rich formation of Bhabar. A key exam cue is: Bhabar means coarse, porous deposits where streams sink; Terai farther south is wetter and often brings water back near the surface.

Related tags

BhabarPermeabilityStreams

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