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Why does Brahmaputra show flow changes from Tibetan Plateau to Assam?

Answer and explanation

Correct answer: Elevation slope and plain conditions change

Direct answer: A, because elevation slope and plain conditions change. A river does not behave in exactly the same way along its whole course. On the Tibetan Plateau it flows through a very high region with different relief, climate and channel conditions. When it reaches Assam, the surrounding land, slope, valley width, rainfall and sediment load change greatly. These changes can alter its speed, channel form, flood behaviour and deposition. Thus A correctly explains the contrast. B is wrong because the river does not lose all its water everywhere. C is wrong because rivers generally flow downhill from higher land towards lower land, not backward from the sea. D is wrong because slope and channel conditions make velocity variable. Memory cue: changing relief produces changing river character.

Related tags

BrahmaputraTibetan PlateauAssam

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