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Write critical notes Groundwater depletion and ways for its replenishment - Biology

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प्रश्न

Write critical notes Groundwater depletion and ways for its replenishment

उत्तर

Ground water depletion and ways for its replenishment: - The level of ground water has decreased in the recent years. The source of water supply is rapidly diminishing each year because of an increase in the population and water pollution. To meet the demand of water, water is withdrawn from water bodies such as ponds, rivers etc. As a result, the source of ground water is depleting. This is because the amount of groundwater being drawn for human use is more than the amount replaced by rainfall. Lack of vegetation cover also results in very small amounts of water seeping through the ground. An increase in water pollution is another factor that has reduced the availability of ground water.

Measures for replenishing ground water:-

(i) Preventing over-exploitation of ground water

(ii) Optimizing water use and reducing water demand

(iii) Rain water harvesting

(iv) Preventing deforestation and plantation of more trees

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अध्याय 16: Environmental Issues - Exercises [पृष्ठ २८६]

APPEARS IN

एनसीईआरटी Biology [English] Class 12
अध्याय 16 Environmental Issues
Exercises | Q 5.3 | पृष्ठ २८६

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

State the cause of accelerated eutrophication


How does algal bloom destroy the quality of a fresh water body? Explain.


Explain how does the algal bloom eventually choke the water body in an industrial area?


List the events that reduce the Biochemical Oxygen Demand (BOD) of a primary effluent during sewage treatment.


List the events that lead to biogas production from waste water whose BOD has been reduced significantly.


"Determination of Biological Oxygen Demand (BOD) can help in suggesting the quality of a water body." Explain.


Write critical notes on Eutrophication


Write critical notes Biological magnification


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.


Explain the role of microbes in cleaning sewage water into usable water.


Biomagnification is caused mainly by ______.


The green scum seen in the fresh water bodies is ______.


The loudness of a sound that a person can withstand without discomfort is about ______.


Match the items in column I and column II and choose the correct option:

Column I Column II
A. UV i. Biomagnification
B. Biodegradable Organic matter ii. Eutrophication
C. DDT iii. Snow blindness
D. Phosphates iv. BOD

The correct match is:


Match the following and choose the correct option.

Column I Column II
A.  Environment Protection Act i.  1974
B.  Air Prevention & Control of Pollution Act ii.  1987
C.  Water Act iii.  1986
D.  Amendment of Air Act to include noise as an air pollutant The correct matches is iv.  1981

Match the following and choose the correct option.

Column I Column II
A. Environment Protection Act

i.

1974
B. Air Prevention & Control of Pollution Act ii. 1987
C. Water Act iii. 1986
D. Amendment of Air Act to include noise as an air pollutant iv. 1981

The correct matches is;


Match the following and choose the correct option.

  Column I   Column II
A. Environment Protection Act i. 1974
B. Air Prevention & Control of Pollution Act ii. 1987
C. Water Act iii. 1986
D. Amendment of Air Act to include noise as an air pollutant  iv. 1981

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