Welcome to the Chapter 3 - Drainage, Class 9 Social Science - Contemporary India NCERT Solutions page. Here, we provide detailed question answers for Chapter 3 - Drainage. The page is designed to help students gain a thorough understanding of the concepts related to natural resources, their classification, and sustainable development.
Our solutions explain each answer in a simple and comprehensive way, making it easier for students to grasp key topics Drainage and excel in their exams. By going through these Drainage question answers, you can strengthen your foundation and improve your performance in Class 9 Social Science - Contemporary India. Whether you’re revising or preparing for tests, this chapter-wise guide will serve as an invaluable resource.
(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.
