Dissolved Oxygen (DO) is important for

Question

Question

This question was previously asked in

UGC NET Paper 1: Held on 1 Oct 2022 Shift 2

Answer 1

Dissolved oxygen is the amount of oxygen that dissolves in the water.

Key Points

The amount of oxygen that is available to living aquatic organisms.
Dissolved oxygen determines the quality of the stream and lake.
The majority of aquatic plants and animals need oxygen to survive.
For example, fish cannot persist in water with dissolved oxygen levels below 5 mg/L for very long.
Low levels of dissolved oxygen in water are indicators of contamination.
It plays a crucial role in defining the technique used to reduce pollution and improve water quality.

Thus, Dissolved Oxygen (DO) is important for River water.

Additional Information

Reasons for the decrease DO in water such as particularly human and animal sewage, industrial waste from paper and leather manufacture, slaughterhouse sewage, and agricultural wastewater.
Organic waste can reduce the Dissolved Oxygen rapidly.