SELECT * FROM question_mgmt as q WHERE id=4479 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=49 AND chapterId=347 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th social-science-contemporary-india-ii Water Resources answer the following questions in about 30 words

Question:

Answer the following questions in about 30 words.

(i) Explain how water becomes a renewable resource.
(ii) What is water scarcity and what are its main causes?
(iii) Compare the advantages and disadvantages of multi-purpose river projects.

Answer:

i) Water cycle process that includes three steps i.e. evaporation, condensation and precipitation. All water that is used primarily ends up in the sea entering the hydrological cycle the water that disappears from the surface of the earth due to evaporation comes back in the form of rain. This is the never ending process which makes it a renewable resource.

(ii) Water scarcity occurs where there is not enough water availability to match the demand due to lack of fresh water demand.

It is caused by a growing population, unequal distribution of water, growing demand for water, over exploitation etc.

(iii) Advantages of multi-purpose river projects:

Multipurpose river projects help in electricity generation, irrigation, inland navigation, water supply for industrial flood control, fish breeding tourist attraction and domestic purposes.

Disadvantages of multi-purpose river projects:

Many native villages are submerged and people lose their livelihoods with little or no hope of rehabilitation. The local flora and fauna get destroyed.


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