At Saralstudy, we are providing you with the solution of Class 9 Social Science - Contemporary India Drainage according to the latest NCERT (CBSE) Book guidelines prepared by expert teachers. Here we are trying to give you a detailed answer to the questions of the entire topic of this chapter so that you can get more marks in your examinations by preparing the answers based on this lesson. We are trying our best to give you detailed answers to all the questions of all the topics of Class 9 Social Science - Contemporary India Drainage so that you can prepare for the exam according to your own pace and your speed.
(i) (c) Dendritic
(ii) (d) Jammu and Kashmir
(iii) (b) Amarkantak
(iv) (a) Sambhar
(v) (b) Godavari
(vi) (d) Tapi
(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.
(a) Wular: Natureal (b) Dal: Natureal
(c) Nainital: Natureal (d) Bhimtal: Natureal
(e) Govind Sagar: Human beings (f) Loktak: Natureal
(g) Barapani: Natureal (h) Chilika: Natureal
(i) Sambhar : Natureal (j) Rana Pratap Sagar: Human beings
(k) Nizam Sagar: Human beings (l) Pulicat : Natureal
(m) Nagarjuna Sagar: Human beings (n) Hirakund:Human Beings
The rivers are important for the country economy because: rivers are the source of natural fresh water which is required for the survival of most of the animals including the human beings. The water from the rivers is used for several domestic, industrial and agricultural purposes. The presence of rivers boosts the trade and commerce by helping in the easy transport of goods. They are also the potential sources of energy. The water from rivers is used for running hydro-electric dams and is also used for navigation and transport thus, important for commercial activities also. It also provides fishing and great scenic and recreational value. Thus, serves as good tourist spots.
