Abunã is district in

Porto Velho Porto Velho (, ''Old Port'') is the capital (political), capital of the Brazilian States of Brazil, state of Rondônia, in the upper Amazon River basin. The population is 460,434 people (as of the Brazilian Institute of Geography and Statistics, ...

, the capital of

Rondônia Rondônia () is one of the 26 states of Brazil, located in the northern subdivision of the country (central-western part). It is bordered by Acre (state), Acre in the west, Amazonas, Brazil, Amazonas in the north, Mato Grosso in the east, and Bo ...

, Brazil. It is situated in 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 ...

on the right bank of the

Madeira River The Madeira River ( ) is a major waterway in South America. It is estimated to be in length, while the Madeira-Mamoré is estimated near or in length depending on the measuring party and their methods. The Madeira is the biggest tributary of ...

upstream from its confluence with the

Abuna River The Abuna River (, ) is a river in South America. As a part of the Amazon Basin, it forms part of the border between northern Bolivia and north-western Brazil. The river has a total length of . It originates in several streams east of the Cordil ...

. The Abuna River and the Madeira River upstream from their confluence mark the boundary between Brazil and

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 so Abunã is across the river from the Bolivia.

References

Populated places in Rondônia Porto Velho {{Rondônia-geo-stub