Guaíba (water body)
water body in Rio Grande do Sul, Brazil

Guaíba (Portuguese pronunciation: [ɡwaˈibɐ]) is a major water body in Rio Grande do Sul, the southernmost state of Brazil. It is commonly referred to either as a "river" (Portuguese: Rio Guaíba) or as a "lake" (Lago Guaíba). The Jacuí River, the Sinos River, the Gravataí River and the Caí River empty into Guaíba from the north, which in its turn empties into the Lagoa dos Patos, the largest lagoon in South America further down south. The body of water covers 496 square kilometres (192 sq mi) in total.
Both Porto Alegre, the capital and most populous city of Rio Grande do Sul, and Viamão lie on its eastern shore. The cities of Guaíba, Eldorado do Sul and Barra do Ribeiro lie opposite to Porto Alegre, on the western shore. Guaíba is navigable, and is connected to the Atlantic Ocean through Lagoa dos Patos and its outlet channel, located further south, near the city of Rio Grande. A major flood occurred in 2024.
Begin with the source’s own compact description: “Guaíba (water body)” is water body in Rio Grande do Sul, Brazil. The dossier treats that line as a proposition to test through Guaíba, water and body, not as a finished interpretation.
Why this record matters
The phrase “water body in Rio Grande do Sul, Brazil” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jul 25, 2026. The linked authority identifier is Q614720. VIAF identifies the subject as 315528516. The Library of Congress control number is nb2017016917. Authority coordinates are -30.156, -51.276. 2 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2024.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Guaíba (water body)”, its source revision and the description used here.
- Expand the search: follow Guaíba (water body) primary sources, Guaíba (water body) archive and Guaíba research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Guaíba (water body)”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Guaíba (water body)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.