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| | The Hydrographi Region of The Amazon |
 | | The Paraná River runs for 2,570 km to its estuary at the Prata River, which added to the 1,170 km of the Paranaíba River, its main tributary, gives a total of 3,740 km, being the third longest river in the Americas. |
 | | The Iguaçu river joins the Paraná River at the point at which the territories of Brazil, Paraguay and Argentina all converge. |
 | | From the confluence of the Paranapanema to the town of Guairá, the Paraná River takes in further, smaller tributaries, amongst these are the Ivaí and Piquiri rivers, on the left bank, and the Ivinheima, Amambaí and Iguatemi rivers, on the right bank. |
| www.ana.gov.br /ingles/Portais/folder/Parana/02-Availability_Use.html |
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