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River kosi Flood UPSC NOTE

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  River kosi Kosi River, also known as Saptakoshi . major river flowing through the borders of India, Nepal and China It originates in the H...

 River kosi

  • Kosi River, also known as Saptakoshi.

  • major river flowing through the borders of India, Nepal and China

  • It originates in the Himalayas of Tibet and joins the Ganga River in Bihar.

  • Kosi River is a perennial river.

What is hyperconcentrated flows & its consequences

  • These are type of water flow that contains a high concentration of suspended sediment. 

  • The sediments in a hyperconcentrated flow can be up to 40% by volume.

  •  Higher than the concentration in a normal flood.

Hyperconcentrated flows can be triggered by,

  • Heavy rainfall

  • Landslides

  • Dam failures

Why in news

Geologists have found evidence of an extreme monsoon event and hyperconcentrated flows 11,000 years ago in the Kosi river.

Wolbachia

  • Wolbachia is a genus of bacteria that lives inside the cells of insects.

  •  It is a very common bacterium, found in over 60% of all insect species. 

  • Wolbachia is not harmful to humans or other animals.

  • But it can have a significant impact on the insects that it infects.

Why in news

 Scientists are breeding the mosquitoes to carry the bacteria Wolbachia, which interrupts the transmission of dengue.


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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: River kosi Flood UPSC NOTE
River kosi Flood UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
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