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The free encyclopaedia called Wikipedia tell us about a big river :
The Amazon river has a series of major river systems in
Colombia, Ecuador and Peru, some of which flow into the
Marañón and
Ucayali, others directly into the Amazon proper. Among others, these include the following rivers:
Putumayo,
Caquetá,
Vaupés,
Guainía,
Morona,
Pastaza, Nucuray, Urituyacu,
Chambira,
Tigre,
Nanay,
Napo, and
Huallaga.
The most distant source of the Amazon was established in 1996,
[10] 2001,
[11] 2007,
[12] and 2008,
[13] as a glacial stream on a snowcapped 5,597 m (18,363 ft) peak called
Nevado Mismi in the Peruvian
Andes, roughly 160 km (99 mi) west of
Lake Titicaca and 700 km (430 mi) southeast of
Lima. The waters from Nevado Mismi flow into the Quebradas
Carhuasanta and Apacheta, which flow into the
Río Apurímac
which is a tributary of the Ucayali which later joins the Marañón to
form the Amazon proper. While the Ucayali–Marañón confluence is the
point at which most geographers place the beginning of the Amazon
proper, in Brazil the river is known at this point as the
Solimões das Águas. Further downriver from that confluence the darkly colored waters of the
Rio Negro meet the sandy colored
Rio Solimões, and for over 6 km (4 mi) these waters run side by side without mixing.
After the confluence of
Río Apurímac and Ucayali, the river leaves Andean terrain and is instead surrounded by
floodplain. From this point to the
Marañón,
some 1,600 km (990 mi), the forested banks are just out of water, and
are inundated long before the river attains its maximum flood stage. The
low river banks are interrupted by only a few hills, and the river
enters the enormous
Amazon Rainforest.
The river systems and flood plains in Brazil, Peru, Ecuador, Colombia and Venezuela, whose waters drain into the
Solimões
and its tributaries are called the "Upper Amazon". The Amazon River
proper runs mostly through Brazil and Peru, it is part of the border
between Colombia and Perú, and it has tributaries reaching into
Venezuela, Colombia, Ecuador, and Bolivia.
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