Argentina, Drainage

The largest river basin in the area is that of the R�o de la Plata (often called the River Plate). It drains an area of some 1.6 million square miles (4.1 million square km), which includes northern Argentina, the whole of Paraguay, eastern Bolivia, most of Uruguay, and a large part of Brazil. The river is actually an estuary formed by the confluence of the Paran� and Uruguay rivers;