Canumã River

The Canumã River, also called Rio Canumã in Portuguese, is a river in the Amazonas state in northwestern Brazil. It lies east of the Madeira River and flows almost parallel to it.

The Canumã River ends where it flows into the Paraná Urariá just before it joins the Madeira River. The short stretch of water between the Canumã River/Paraná Urariá and the Madeira River is called the Paraná do Canumã. Through the Paraná Urariá, the Canumã River connects to several smaller rivers and finally links to the Paraná do Ramos. This area has an average flow of 2930 cubic meters every second and is a side channel of the Amazon River.

The Canumã River starts where the Acari and Sucunduri Rivers meet. Sometimes, the Sucunduri River and the Canumã River are thought of as one long river, with the Sucunduri being the upper part and the Canumã being the lower part. When seen this way, the whole river is called the Canumã-Sucunduri.