NCERT Class 9 Geography Solutions: Drainage (Contemporary India-I) Chapter 3– Part 4

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Q-2. Answer the following questions briefly

(i) What is meant by a water divide? Give an example.

Answer:

  • Highland or a mountains separating the basins are known as water divide.

    Image illustrating water divide forcing the flow in opposide directions

    Water Divide Forcing the Flow in Opposide Directions

    Image illustrating water divide forcing the flow in opposide directions

  • For example: the Sutlej and the Brahmaputra rivers altitudes are close to each other near the Mansarovar Lake but because of the water divide they flow in different directions.

    Water divide example with Sutlej and Brahmaputra at Mansarovar

    Sutlej and Brahmaputra With Water Divide

    Water divide example with Sutlej and Brahmaputra at Mansarovar

(ii) Which is the largest river basin in India?

Answer: The Ganga basin is the largest river basin in India. Following table illustrates the areas of various largest basins.

Countrywise area under the largest basins

Basins and Countrywise Areas

Countrywise area under the largest basins

Ganga Basin largest basin of India

Ganga Basin

Ganga Basin largest basin of India

(iii) Where do the rivers Indus and Ganga have their origin?

Answer: The Indus River originates from Tibet near the Mansarovar Lake and the Ganga River originates from Gangotri Glacier in Uttaranchal.

Gangotri originate place of Ganga

Gangotri Originate Place of Ganga

Gangotri originate place of Ganga

Indus originates from Mansarovar in Tibet

Indus Originates From Mansarovar in Tibet

Indus originates from Mansarovar in Tibet