RBSE Class 11 Indian Geography Notes Chapter 5 Drainage System of India

Go through these RBSE Class 11 Indian Geography Notes Chapter 5 Drainage System of India contain important concepts so that students can score better marks in the exam.

Rajasthan Board RBSE Class 11 Indian Geography Notes Chapter 5 Drainage System of India

→ The development of Indian civilization and culture took place in river-valleys.

→ The rivers have played an important role in the development of historical religious, commercial and industrial cities in India.

→ There is a matchless contribution of rivers in economic development of India.

Change of Routes

  • The routes of Indian rivers have been changing since beginning, out of which the drainage system of Indus-Brahmaputra rivers is the most important.
  • In the past the drainage system of Indus-Brahmaputra joined Suleiman and Kirther ranges which were parallel to the Himalayas, and with the passage of time, it got divided into two parts – Indus and Brahmaputra.
  • The main rivers in India which change their routes are Brahmaputra, Ganga and Kosi.

Water Shed or Water Divider

  • The system that divides water flow of a region in the specific conditions is called watershed or divider.
  • Water divider line India starting from Manasarovar lake passes through Kamet mountain, and after entering Udaipur with Aravalis includes the vallys of rivers Narmada and Tapti is extending to Kanyakumari along with Western Ghats.

RBSE Class 11 Indian Geography Notes Chapter 5 Drainage System of India

Geographical Classification of Drainage

  • From geographical perspective, Indian drainage system has been divided into three parts Himalayas drainage system, Peninsular drainage system and Inland drainage system.

Himalayas Drainage System

  • The Himalayas drainage system is also known as Northern India drainage system.
  • The Himalayas drainage system has been classified into Indus, Ganga and Brahmaputra drainage system.
  • Indus drainage system includes the rivers Satluj, Beas, Ravi, Chenab, and Jhelum.
  • An area of 3.25 lakh sq. km of Indus drainage system is found in India.
  • The Ganga drainage system stretches to 8.6 lakh sq. km area in which rivers Chambal, Betwa, Ken, Yamuna, Kosi, Ramganga, Gomati, Ghaghara, Son etc. are included.
  • River Kosi of Ganga drainage system keeps on changing its route and becomes a cause of disasters, so it is called a sorrow of Bihar.
  • The Brahmaputra drainage system includes rivers like Divang, Lohit, Bhareli, Subansiri, Manas, Kapali, Buri, Dihing etc.

Peninsular Drainage System

  • Peninsular drainage system is classified into the rivers draining into Bay of Bengal and the rivers draining into Arabian sea.
  • The main rivers that drain into Bay of Bengal are Damodar, Swarbrekha, Brahmani, Mahanadi, Godavari, Bhima, Krishna, Tungabhadra, Pennar, Palar, Kaveri, Vaigai etc.
  • The River Damodar always changes its way, so it is called the sorrow of Bengal.
  • Mahanadi, Godavari, Krishna and Kaveri Rivers make delta at the eastern coast.
  • The rivers that meet Arabian sea are Narmada, Tapti, Luni, Sabarmati, Mahi, Sukari, Bandi, and Sharavati.

Inland Drainage System

  • Inland drainage system is extended from Sambhar Lake in Rajasthan to Ghaggar in Hariyana.
  • The rivers of this systems are seasonal so they ended either in the lakes or into the deserts.

RBSE Class 11 Indian Geography Notes Chapter 5 Drainage System of India

Drainage System of India Notes Important Terms

→ Civilization: It is the physical form of culture which presents an ancient time nature of human with a variety of cultures.

→ Culture: It is the characteristics and knowledge of a particular group of people comprising language, religion, social habits, music and arts.

→ Valley: A low area of land between hills or mountains, typically with a river or stream flowing through it.

→ Climate: The composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness and winds throughout the year or a long time.

→ Irrigation: A method of irrigate to crops in dry season.

→ Transport: The act of carrying people and goods from one place to another place by any means.

→ Drainage: Flow of water according to the surface gradient.

→ Water shed or Water divider: The system that divides water flow of a region in the specific conditions.

→ Bay: A Bay is a recessed, coastal body of water that directly connects to a larger main body of water such as an ocean, lake or another bay.

→ Inland Drainage: Inland drainage is that drainage in which rivers do not reach an ocean or sea but empty their water in a lake or an inland sea.

→ Lake: An expanse of water entirely surrounded by land and unconnected to the sea except by rivers or streams.

→ Sea: Seas are smaller than oceans and are usually located where the land and ocean meet.

→ Peninsula: A peninsula is a piece of land that is almost surrounded by water but is connected to the mainland on one side.

→ Gorge: It is a narrow valley with steep rocky walls located between hills or mountains.

→ Dam or Embankment: It is a barrier that holds back water, dams are primarily used to save, manage and prevent the flow of excess water into specific regions.

→ Confluence: The place where two or more flowing bodies of water join to form a single channel

→ Delta: A triangular tract of sediment deposited at the mouth of a river, typically where it diverges into several outlets.

→ Waterfall: A cascade of water falling from a height, formed when a river or stream flows over a steep incline.

→ Fault: A fault is a planar fracture or discontinuity in a volume of rock, across which there has been significant displacement as a result of rock mass movement.

→ Desert: It is a landscape form or region that receives very little precipitation.

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