Río de la Plata (IMAGE) University of Washington Caption A 2002 satellite view of the Río de la Plata, which forms at the confluence of the the Paraná River and the Paraguay River. The Río de la Plata drains a basin of more than 1.2 million square miles, the second-largest in South America after the Amazon basin. Credit Jacques Descloitres/MODISRapid Response Team/NASA/GSFC Usage Restrictions Must include credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.