What is the vast river basin that covers most of northern Brazil and parts of Bolivia Peru Ecuador Columbia and Venezuela?

Answer 1

The Amazon Basin, the largest drainage basin in the world, covers about 40 percent of South America, an area of approximately 7,050,000 square kilometres (2,720,000 sq mi). It gathers its waters from 5 degrees north latitude to 20 degrees south latitude. Its most remote sources are found on the inter-Andean plateau, just a short distance from the Pacific Ocean.

The Amazon River and its tributaries more than triples over the course of a year. In an average dry season, 110,000 square kilometres (42,000 sq mi) of land are water-covered, while in the wet season, the flooded area of the Amazon Basin rises to 350,000 square kilometres (140,000 sq mi).

The quantity of water released by the Amazon to the Atlantic Ocean is enormous: up to 300,000 cubic metres (11,000,000 cu ft) per second in the rainy season. The Amazon is responsible for about 20% of the total volume of freshwater entering the ocean. Potable water can be drawn from the ocean while still out of sight of the coastline, and the salinity of the ocean is notably lower 500 kilometres (310 mi) out to sea.[citation needed]

There is a natural water union between the Amazon and the Orinoco basins, the so-called Casiquiare canal. Actually the Casiquiare is a river distributary of the upper Orinoco, which flows southward into the Rio Negro, which in turn flows into the Amazon. The Casiquiare is the largest river on the planet that links two major river systems, a so-called bifurcation.

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Answer 2

Amazon Basin

Answer 3

amazon basin