[The death of fish due to ...] A river with an inflow of domestic sewage-rich in organic waste may result in:

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TNPSC G4

10th CBSE Maths

A river with an inflow of domestic sewage-rich in organic waste may result in:

The death of fish due to lack of oxygen.

Drying of the river very soon due to the algal bloom.

The increased population of aquatic food web organisms.

An increased production of fish due to biodegradable nutrients.

Explanation:

Organic wastes from domestic sewage when reaches the river, it increases the rate of reproduction of algae present in river. It causes Algal Bloom or Eutrophication due to which BOD of water increases life present below the algal bed dies due to lack of O₂.

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