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Po, river, Italy

(Encyclopedia)Po pō, It. pô [key], Latin Padus, longest river of Italy, c.405 mi (650 km) long, rising in the Cottian Alps of Piedmont, NW Italy. It winds generally east in a wide valley, past Turin, Pavia, Piace...

Roosevelt, river, Brazil

(Encyclopedia)Roosevelt, river, c.400 mi (640 km) long, NW Brazil. It was called the Rio da Dúvida [River of Doubt] until it was explored by Theodore Roosevelt in 1913. Renamed in his honor, it is occasionally cal...

Samara, river, Russia

(Encyclopedia)Samara səmäˈrə [key], river, c.360 mi (580 km) long, rising in the foothills of the S Urals, European Russia. It flows generally northwest, and joins the Volga River at Samara. ...

Tweed , river, Scotland

(Encyclopedia)Tweed, river, 97 mi (156 km) long, rising in the Southern Uplands of Scotland. It flows E through S Scotland then NE, forming the Scotland-England border for 17 mi (27 km) before entering the North Se...

Tocantins , river, Brazil

(Encyclopedia)Tocantins river, 1,640 mi (2,639 km) long, formed in S central Goiás state, Brazil, by the confluence of two headstreams. It flows N to the Pará River, the southern distributary of the Amazon, SW of...

Trent , river, England

(Encyclopedia)Trent, river, c.170 mi (270 km) long, rising on Biddulph Moor, Staffordshire, W England. It flows generally NE through central England before joining with the Ouse River to form the Humber estuary. Th...

Thames , river, England

(Encyclopedia)Thames tĕmz [key], Rom. Tamesis, principal river of England, c.210 mi (340 km) long. It rises in four headstreams (the Thames or Isis, Churn, Coln, and Leach) in the Cotswold Hills, E Gloucestershire...

Niger, river, Africa

(Encyclopedia)Niger nīˈjər [key], great river of W Africa, c.2,600 mi (4,180 km) long, rising on the Fouta Djallon plateau, SW Guinea, and flowing NE through Guinea and into Mali. In central Mali the Niger forms...

Pará, river, Brazil

(Encyclopedia)Pará, river, c.200 mi (320 km) long, N Brazil. It is actually the southeastern arm or estuary of the Amazon, divided from the rest of the river by Marajó island. It receives the waters of the Tocant...

Paraíba, river, Brazil

(Encyclopedia)Paraíba or Paraíba do Sul do͝o so͞ol [key], river, c.650 mi (1,050 km) long, rising as the Paraitinga in the Serra do Mar, São Paulo state, SE Brazil. It flows southwesterly to a point NE of São...