The Abuna River (, ) is a river in South America. As a part of the
Amazon Basin
The Amazon basin is the part of South America drained by the Amazon River and its tributary, tributaries. The Amazon drainage basin covers an area of about , or about 35.5 percent of the South American continent. It is located in the countries ...
, it forms part of the
border
Borders are generally defined as geography, geographical boundaries, imposed either by features such as oceans and terrain, or by polity, political entities such as governments, sovereign states, federated states, and other administrative divisio ...
between northern
Bolivia
Bolivia, officially the Plurinational State of Bolivia, is a landlocked country located in central South America. The country features diverse geography, including vast Amazonian plains, tropical lowlands, mountains, the Gran Chaco Province, w ...
and north-western
Brazil
Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...
.
The river has a total length of . It originates in several streams east of the
Cordillera Oriental of the
Peru
Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pac ...
vian
Andes
The Andes ( ), Andes Mountains or Andean Mountain Range (; ) are the List of longest mountain chains on Earth, longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range ...
. The river is navigable for circa in its lower northeastern part. At
Manoa
Manoa (, ; ) is a valley on the island of Oahu, Hawaii. It is a residential neighborhood of Honolulu, Hawaii. The neighborhood is approximately three miles (5 km) east and inland from downtown Honolulu and less than a mile (1600 m) from ...
it joins the Río Madeira, a tributary of the Amazon. Opposite the river mouth is the town of
Abunã on the Brazilian side of the confluence.
References
Rivers of Acre (state)
Rivers of Rondônia
Bolivia–Brazil border
International rivers of South America
Rivers of Pando Department
Border rivers
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