Question

What is meant by drainage ? Explain any four benefits of rivers.

CBSE Class IX Social Science SA (3 Marks)

Answer 1

Answer:

Definition - What does Drainage mean?

Drainage is the process in which water leaches downward from the upper soil layers to lower layers, or how surface water is removed.

Proper drainage is important because not all plants prefer moist conditions. In nature certain minerals such as sand provide rapid drainage, while heavy minerals like clay can restrict drainage. For container or potted plants drainage is facilitated by holes in the bottom of the pot.

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Answer 2

Answer:The term drainage describes the river system off an area.you will notice that Small streams flowing from different directions come together to form the main river,which ultimately drains into large water body such as a lake or a sea or an ocean.