SELECT * FROM question_mgmt as q WHERE id=7728 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=8 AND subId=83 AND chapterId=657 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 9th social-science-contemporary-india Drainage answer the following questions briefly i what

Question:

Answer the following questions briefly.
(i) What is meant by a water divide? Give an example.
(ii) Which is the largest river basin in India?
(iii) Where do the rivers Indus and Ganga have their origin?
(iv) Name the two headstreams of the Ganga. Where do they meet to form the Ganga?
(v) Why does the Brahmaputra in its Tibetan part have less silt, despite a longer course?
(vi) Which two Peninsular rivers flow through trough?
(vii) State some economic benefits of rivers and lakes.

Answer:

(i) Any upload or a mountain that separates two adjoining drainage basins is called as water divide. An example of water divide: the western ghats.

(ii) The ganga river basin is the largest river basin in India.

(iii) The Indus river has its origin in Tibet near the mansarovar lake while the ganga river has its origin in gangotri glacier in Uttaranchal.

(iv) Alaknanda and Bhagirathi are the two headstreams of the ganga. They both meet to form the ganga at devprayag.

(v) `The Brahmaputra river that is known as tsangpo in the Tibet receives very little amount of water in Tibet, so it carries little silt. But once it enters India, brahmputra is fed by heavy rains and carries lot of water and silt.

(vi) The two rivers which flows through troughs are narmada and tapi; forms estuaries while entering the sea.

(vii) River is very beneficial for agricultural purposes and generating hydro electricity. It provides fisheries inland channels for transport. Lakes like the sambhar lake provides edible salt. Rgey also helps in the development of tourism and provided recreation.


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