Afluenți | Rio Negro, del Arenal Grande[*][[del Arenal Grande |]], Arroyo Boycuá[*][[Arroyo Boycuá (river in Uruguay)|]], Arroyo Chapicuy Grande[*][[Arroyo Chapicuy Grande (river in Uruguay)|]], Guaviyú[*][[Guaviyú (stream)|]], Itacumbú[*][[Itacumbú (stream)|]], Mandiyú[*][[Mandiyú (stream)|]], Negro[*][[Negro (stream)|]], Palma Sola Grande[*][[Palma Sola Grande (stream in Artigas Department, Uruguay)|]], Arroyo Román Grande[*][[Arroyo Román Grande (stream)|]], Arroyo Yacuy[*][[Arroyo Yacuy (stream)|]], Arroyo de la Agraciada[*][[Arroyo de la Agraciada (stream)|]], Ñaquiñá[*][[Ñaquiñá (stream)|]], San Salvador River[*][[San Salvador River (river in Uruguay)|]], Quaraí River[*][[Quaraí River (river)|]], Arapey Grande River[*][[Arapey Grande River (river in Uruguay)|]], Pelotas River[*][[Pelotas River (river in Rio Grande do Sul / Santa Catarina, Brazil)|]], Lajeado Macuco River[*][[Lajeado Macuco River (river in Brazil)|]], Ibicuí River[*][[Ibicuí River (river in Brazil)|]], Mocoretá River[*][[Mocoretá River (river in Argentina)|]], Da Várzea River[*][[Da Várzea River (river in Rio Grande do Sul, Brazil)|]], Canoas River[*][[Canoas River (river in Santa Catarina, Brazil; tributary of Uruguay River)|]], Barra Grande River[*][[Barra Grande River (river in Santa Catarina, Brazil)|]], Chalana River[*][[Chalana River (river in Brazil)|]], Chapecó River[*][[Chapecó River (river in Santa Catarina, Brazil)|]], Comandaí River[*][[Comandaí River (river in Rio Grande do Sul, Brazil)|]], Guarita River[*][[Guarita River (river in Rio Grande do Sul, Brazil)|]], Ijuí River[*][[Ijuí River (river in the Brazilian state of Rio Grande do Sul)|]], Iracema River[*][[Iracema River (river in Santa Catarina, Brazil)|]], Irani River[*][[Irani River (river in Santa Catarina, Brazil)|]], Rio Jacutinga[*][[Rio Jacutinga (river in Brazil)|]], Macaco Branco River[*][[Macaco Branco River (river in Brazil)|]], Passo Fundo River[*][[Passo Fundo River (river in Rio Grande do Sul, Brazil)|]], Pepiri-Guazu River[*][[Pepiri-Guazu River (river in Argentina & Brazil)|]], Rancho Grande River[*][[Rancho Grande River (river in Santa Catarina, Brazil)|]], Santa Cruz River[*][[Santa Cruz River (river in Santa Catarina, Brazil)|]], Santa Rosa River[*][[Santa Rosa River (river in Rio Grande do Sul, Brazil)|]], Santo Cristo River[*][[Santo Cristo River (river in Rio Grande do Sul, Brazil)|]], Taquari River[*][[Taquari River (river in Rio Grande do Sul, Brazil)|]], Toropi River[*][[Toropi River (river in Rio Grande do Sul, Brazil)|]], Turvo River[*][[Turvo River (river in Rio Grande do Sul, Brazil; tributary of Uruguay River)|]], Peixe River[*][[Peixe River (river in Santa Catarina, Brazil; tributary of Uruguay River)|]], Gualeguaychú River[*][[Gualeguaychú River (river in Argentina)|]], Miriñay River[*][[Miriñay River (river in Argentina)|]], Aguapey River[*][[Aguapey River (river in Argentina)|]], Das Antas River[*][[Das Antas River (river in Santa Catarina, Brazil)|]], Arroyo Pos Pos[*][[Arroyo Pos Pos (watercourse in Argentina)|]], Arroyo Chafariz[*][[Arroyo Chafariz (watercourse in Argentina)|]], Arroyo Chico Alférez[*][[Arroyo Chico Alférez (watercourse in Argentina)|]], Arroyo Chimiray[*][[Arroyo Chimiray (watercourse in Argentina)|]], Arroyo Ciriaco[*][[Arroyo Ciriaco (watercourse in Argentina)|]], Arroyo Cuay Grande[*][[Arroyo Cuay Grande (watercourse in Argentina)|]], Arroyo El Tala[*][[Arroyo El Tala (watercourse in Argentina)|]], Arroyo Itacaruaré[*][[Arroyo Itacaruaré (watercourse in Argentina)|]], Arroyo Juan Asencio[*][[Arroyo Juan Asencio (watercourse in Argentina)|]], Arroyo Mandisoví Grande[*][[Arroyo Mandisoví Grande (watercourse in Argentina)|]], Arroyo Mandisoví Chico[*][[Arroyo Mandisoví Chico (watercourse in Argentina)|]], Arroyo Mármol[*][[Arroyo Mármol (watercourse in Argentina)|]], Arroyo Once Vueltas[*][[Arroyo Once Vueltas (watercourse in Argentina)|]], Arroyo Perucho Verna[*][[Arroyo Perucho Verna (watercourse in Argentina)|]], Arroyo Pindaití[*][[Arroyo Pindaití (watercourse in Argentina)|]], Arroyo San Francisco Grande[*][[Arroyo San Francisco Grande (river in Uruguay)|]], Arroyo Tapebicuá[*][[Arroyo Tapebicuá (watercourse in Argentina)|]], Arroyo Timboy[*][[Arroyo Timboy (watercourse in Argentina)|]], Arroyo Urquiza[*][[Arroyo Urquiza (watercourse in Argentina)|]], Arroyo Yabotí Guazú[*][[Arroyo Yabotí Guazú (watercourse in Argentina)|]], Yatay creak[*][[Yatay creak |]], Arroyo Yeruá[*][[Arroyo Yeruá (watercourse in Argentina)|]], Arroyo Yuquerí Grande[*][[Arroyo Yuquerí Grande (watercourse in Argentina)|]], del Sauce[*][[del Sauce |]], Arroyo Ñancay[*][[Arroyo Ñancay (watercourse in Argentina)|]], Río Guaviyú[*][[Río Guaviyú (river in Uruguay)|]], Rio Palmitos[*][[Rio Palmitos (river in Brazil)|]], São Domingos River[*][[São Domingos River (river in Santa Catarina, Brazil)|]], Icamaquã River[*][[Icamaquã River (river in Rio Grande do Sul, Brazil)|]], Río Paraná Bravo[*][[Río Paraná Bravo (watercourse in Argentina)|]], River Daymán[*][[River Daymán (river in Uruguay)|]], Queguay Grande River[*][[Queguay Grande River (river in Uruguay)|]]  |
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