Question

The main source of water for perennial rivers is in the form of:
(A) lakes
(B) rain water
(C) snow
(D) dams

Answer 1

Hint: Perennial rivers continuously supply water throughout the year. Out of the given options, identify the option that can supply water to Perennial rivers continuously throughout the year.

Complete answer:
The word perennial has roots in Latin language.
In the Latin language, the word ‘perennis’ signifies something that lasts for the entire year.
Another name for perennial rivers is permanent rivers.
In north India, perennial rivers are found in the Himalayas. The Himalayas have a cover of snow. However, mountains are not present in south India. Hence, you would not find perennial rivers.
Perennial rivers continuously supply water throughout the year. Hence, they have agricultural importance. An example of a perennial river is Ganga. Also included are five tributaries of Ganga, which include Gandak, Yamuna, Gomti, Gaghara, and Kosi.
Other examples are Indus and its five tributaries which include Chenab, Jhelum, Beas, Ravi and Sutlej. Also included are river Brahmaputra and its tributaries Torsa, Manas, Tista, Subansiri, Jaldhaka, Lohit and Dibang.
In all the four seasons of the year, you can observe that perennial rivers are flowing continuously. Such rivers start from the mountains. When glaciers melt, they supply the water to perennial rivers. During monsoon, perennial rivers get rain water. During the summer season, perennial rivers get water from melting ice. During the winter season, perennial rivers get water from snow.
Thus, the main source of water for perennial rivers is in the form of snow:

Hence, the option (C) is the correct option.

Note: The river represents a natural water stream. River flows into a lake, ocean or another river. Every continent has rivers. However not even a single river is present in 18 countries.