Rio dos Sinos
| Rio dos Sinos | ||
 120 m, waterfall of the Rio dos Sinos (2013) |
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| Data | ||
| location | Brazil | |
| River system | Rio Guaíba | |
| Drain over | Jacuí Delta → Guaíba → Lagoa dos Patos → Atlantic | |
| source | at Caraá | |
| Source height | 700 m | |
| muzzle | at Canoas in the Jacuí delta coordinates: 29 ° 56 '4 " S , 51 ° 14' 9" W 29 ° 56 '4 " S , 51 ° 14' 9" W. |
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| Mouth height | 5 m | |
| Height difference | 695 m | |
| Bottom slope | 3.7 ‰ | |
| length | 190 km | |
| Catchment area | 3820 km² | |
| Right tributaries | Rio Rolante , Rio Paranhana | |
| Big cities | Novo Hamburgo , São Leopoldo , Canoas , Sapucaia do Sul | |
| Medium-sized cities | Esteio , Sapiranga , Campo Bom , Taquara | |
| Residents in the catchment area | 1.2 million | |
The Rio dos Sinos is a river in the southern Brazilian state of Rio Grande do Sul . It rises in the Serra Geral near Caraá about 130 kilometers east of Porto Alegre and flows through a total of 32 municipalities into the Jacuí Delta , which drains into the Rio Guaíba shortly afterwards . As far as São Leopoldo it flows in a westerly direction, there it bends towards the south.
In the first 15 kilometers, the river plunges over several waterfalls, the highest over 100 meters high. There the water is clear and drinkable. In the lower reaches of the Rio dos Sinos, on the other hand, is heavily polluted by untreated sewage, also from local industry, for example tanneries. For example, it is a symbol of the destruction of nature for local environmental groups and many, especially in the vicinity of the University of São Leopoldo, are committed to cleaning the river.
The river was formerly known as Curuyarei and later Itapuy . Since 1748 it has been regularly referred to by its current name, which means a winding river.
The Vale dos Sinos was one of the most important settlement areas for German immigrants in the 19th century .