Great Rivers - geography.

Great Rivers - geography. Amazon River With a length of 6,400 km (4,000 mi), the Amazon is slightly shorter than the Nile, but its discharge, or flow, is far greater. A river's discharge depends on two key variables: the area of its drainage basin and the amount of precipitation within the basin. The Amazon's drainage basin is the largest in the world, covering about 6 million square kilometers (2 million square miles), and i...