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Geography Optional 300+ Score Pack · Model answer

Explain the changing river courses and their impacts on the riparian population in India with suitable examples.

  • UPSC 2018
  • Contemporary Issues

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Sediment supply is the driver. The Ganga-Brahmaputra-Meghna system moves, on differing estimates, from about half a billion to over a billion tonnes of sediment a year, and these rivers lose competence abruptly on leaving the mountain front onto a low-gradient alluvial fan.

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What the full answer covers

  • Why alluvial rivers in India do not stay put
  • The named cases
  • What it does to the riparian population
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