It is the area of the land that collects all the precipitation the drains in the outlet of the stream or the river, this body of water of water is located at the surface and can be an underground source also.
<u>Thus it acts as a funnel about 50% of the world's water is drained in the Atlantic ocean. The largest rover to drain its water is the amazon river of South America followed by the Nile river in Africa.
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Hence a basin is a geographical base of studying the hydrological parameter of a place, as originated from the rainfall or perennial mountain ranges.
