The Unini River ( pt, Rio Unini) is a river of
Amazonas state in north-western
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 a right tributary of the
Rio Negro.
Course
The Unini River forms where the Água Preta stream joins the
Preto River.
It then flows east to the Rio Negro, forming the border between the
Rio Unini Extractive Reserve
The Rio Unini Extractive Reserve ( pt, Reserva Extrativista Rio Unini) is an extractive reserve in the state of Amazonas, Brazil.
Location
The Rio Unini Extractive Reserve is in the municipality of Barcelos, Amazonas.
It has an area of .
It ext ...
to the north and the
Jaú National Park
The Jaú National Park ( pt, Parque Nacional do Jaú) is a National park (Brazil), national park located in the state of Amazonas State, Brazil, Amazonas, Brazil.
It is one of the largest forest reserve in South America, and part of a World Herita ...
to the south.
The river basin has about 1,500 streams and over 1,000 lakes, with an estimated length of from its mouth to the headwaters.
The basin covers about .
The largest tributaries are the Papagaio, Paunini and Solimõezinho streams.
The river has generally acidic water with little suspended material.
The river and its tributaries make many meanders, creating great diversity of aquatic environments including lakes, rivers, creeks and flooded forests.
The river is lowest between October and November, and highest between June and July.
Water levels vary from minimum to maximum between .
See also
*
List of rivers of Amazonas
References
Sources
*
*
Rivers of Amazonas (Brazilian state)
Tributaries of the Rio Negro (Amazon)
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