Unini River
The Unini River (Portuguese: Rio Unini) is a river of Amazonas state in north-western Brazil. It is a right tributary of the Rio Negro.
| Unini River | |
|---|---|
  | |
| Native name | Rio Unini (Portuguese) |
| Location | |
| Country | Brazil |
| Physical characteristics | |
| Source | |
| • location | Amazonas |
| • coordinates | 1.687561°S 63.810452°W |
| Mouth | |
• location | Rio Negro, Amazonas |
• coordinates | 1.6736°S 61.5061°W |
| Length | 400 km (250 mi) |
| Basin size | 27,000 km2 (10,000 sq mi) |
| Discharge | |
| • location | Confluence of Rio Negro, Amazonas State |
| • average | 1,050 m3/s (37,000 cu ft/s) |
| Basin features | |
| River system | 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 to the north and the Jaú National Park to the south.[1] The river basin has about 1,500 streams and over 1,000 lakes, with an estimated length of 400 kilometres (250 mi) from its mouth to the headwaters. The basin covers about 2,689,644 hectares (6,646,260 acres). The largest tributaries are the Papagaio, Paunini and Solimõezinho streams.[2]
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 11.26 and 15.75 metres (36.9 and 51.7 ft).[2]
See also
References
- RESEX Rio Unini – ISA, Informações gerais (mapa).
- Unidade de Conservação ... MMA.
Sources
- RESEX Rio Unini (in Portuguese), ISA: Instituto Socioambiental, retrieved 2016-09-14
- Unidade de Conservação: Reserva Extrativista Rio Unini (in Portuguese), MMA: Ministério do Meio Ambiente, retrieved 2016-09-14