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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