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Geography Notes: Drainage System of India

Geography Notes: Drainage System of India

Rivers and Drainage System of India GK Geography Notes for upcoming exams like SSC CGL, SBI PO, SBI Clerk, IBPS PO, IBPS Clerk with expected questions.

Introduction:

✦ The flow of water through well-defined channels is known as drainage and the network of such channels is known as drainage system.

✦ The drainage pattern of an area is the result of the geological time period, nature, and structure of rocks, topography, slope, etc.

✦ About 77% of the drainage area consisting of the Ganga, the Brahmaputra, the Mahanadi, the Krishna, etc. is oriented towards the Bay of Bengal.

✦ On the other hand, 23% comprising the Indus, the Narmada, the Tapi, the Mahi, and the Periyar systems discharge their waters in the Arabian Sea.

✦ A river drain is a specific area, which is known as the catchment area of that river.

✦ An area drained by a river and its tributaries is known as a drainage basin.

✦ The boundary line separating one drainage basin from the other is called as the watershed area.

Himalayan Drainage system

It consists of the rivers originating in the Himalayan and trans-Himalayan region.

The major Himalayan rivers are the Ganga, the Indus and the Brahmaputra.

These rivers are very long compared to the rivers of South India.

They are called perennial rivers as they are fed by both rainfall and the melting of snow.

Peninsular Drainage Systems

The Peninsular drainage system is older than the Himalayan Rivers.

Peninsular rivers are both west and east flowing.

Narmada and Tapi drain into Arabian Sea where Mahanadi, Godavari, Cauvery and Krishna drain into Bay of Bengal.

East flowing rivers form delta where west flowing rivers don’t form delta.

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