Lake Guaíba () is a waterway (496 km²) in

Rio Grande do Sul Rio Grande do Sul (, , ; "Great River of the South") is a Federative units of Brazil, state in the South Region, Brazil, southern region of Brazil. It is the Federative_units_of_Brazil#List, fifth-most-populous state and the List of Brazilian st ...

, the southernmost state of

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

. It is famous for its beautiful reflection at sunset. The Guaíba is an extension of the

Lagoa dos Patos Lagoa dos Patos (, , ; English: ''Ducks' Lagoon'') is the largest lagoon in Brazil and the largest coastal lagoon in South America. It is located in the state of Rio Grande do Sul, southern Brazil. It covers an area of , is long and has a maximu ...

, the largest lagoon in South America. It is commonly referred to as a "

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

" besides "

lake A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much large ...

". The

Jacuí River The Jacuí River () is a river in Rio Grande do Sul state of southern Brazil. The Jacuí empties into the Guaíba River, an estuarine arm of the Lagoa dos Patos, a large coastal lagoon connected to the Atlantic Ocean. Sources The Jacuí River, ...

, the Sinos River, the

Gravataí River Gravataí River () is a river that runs along Gravataí (a city located in the metropolitan area of Porto Alegre Porto Alegre (, , Brazilian ; ) is the capital and largest city of the Brazilian state of Rio Grande do Sul. Its population of 1, ...

and the

Caí River The Caí River () is a river of Rio Grande do Sul state in southern Brazil. It is a tributary of the Jacuí River, just above the junction with the Guaíba. See also *List of rivers of Rio Grande do Sul List of rivers in Rio Grande do Sul (Br ...

empties into the Guaíba from the north. Both

Porto Alegre Porto Alegre (, , Brazilian ; ) is the capital and largest city of the Brazilian state of Rio Grande do Sul. Its population of 1,488,252 inhabitants (2020) makes it the List of largest cities in Brazil, twelfth most populous city in the country ...

, the capital and most populous city of Rio Grande do Sul, and

Viamão Viamão is a city in Rio Grande do Sul, Brazil. In size it is the largest municipality in the metropolitan region of Porto Alegre and the seventh most populous in the state. The origin of the name Viamão is controversial. The more common explan ...

lies on its eastern shore. The cities of

Guaíba Guaíba is a city located in the Metropolitan Porto Alegre of Porto Alegre, in the Brazilian state of Rio Grande do Sul. The city is on the shores of the Guaíba Lake. History In the current territory of the municipality of Guaíba there have ...

, Eldorado do Sul and Barra do Ribeiro lies opposite to Porto Alegre, on the western shore. The Lake Guaíba is navigable, and is connected to the

Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...

through

and its outlet channel, located farther south, at the city of

Rio Grande The Rio Grande ( and ), known in Mexico as the Río Bravo del Norte or simply the Río Bravo, is one of the principal rivers (along with the Colorado River) in the southwestern United States and in northern Mexico. The length of the Rio G ...

References

Landforms of Rio Grande do Sul

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