Plenty of algal bloom is observed in a pond in your locality.
(a) Write what has caused this bloom and how does it affect the quality of water.
(b) Suggest a preventive measure.

Solution

(a) The presence of large amounts of nutrients in water leads to algal bloom. These nutrients (nitrogen and phosphorus) are added to water bodies from fertilisers that get issolved in soil and are washed off by water bodies. Algal bloom affects the quality of water in the
following ways:
(i) It causes deterioration of water quality making it unfit to use.
(ii) Eutrophication (natural ageing of water bodies) is accelerated, resulting in hypoxic conditions (i.e. low oxygen), killing off the aquatic diversity.
(b) To prevent the algal bloom, the farmers instead of using chemical nutrients must start using natural products like manures produced using vermicomposting. Biodegradable materials should be used, that are readily decomposed and are phosphate free. Awareness should be created among people about the effects of dumping waste in water bodies.

Some More Questions From Environmental Issues Chapter

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Environmental Issues

Plenty of algal bloom is observed in a pond in your locality.
(a) Write what has caused this bloom and how does it affect the quality of water.
(b) Suggest a preventive measure.

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For Daily Free Study Material Join wiredfaculty

Environmental Issues

Plenty of algal bloom is observed in a pond in your locality.(a) Write what has caused this bloom and how does it affect the quality of water.(b) Suggest a preventive measure.

Some More Questions From Environmental Issues Chapter

Which of the following pollutants is not produced by exhaust of motor vehicles ?

What is the term for the inflammation of cornea due to high absorption of UV-B radiation :

Smog is a mixture of :

WHO’s recommendations about the industrial noise limit is of :

Which of the atmospheric layer contains ozone layer ?

The amount of dissolved oxygen required by the microorganisms to degrade the organic wastes present in water is called ?

The cause of acid rain is :

Which one of the following causes ozone depletion ?

What disease is caused due to consumption of fishes captured from water contaminated with mercury ?

Which one of the following is not a green-house gas ?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Plenty of algal bloom is observed in a pond in your locality.
(a) Write what has caused this bloom and how does it affect the quality of water.
(b) Suggest a preventive measure.