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Ucayali(o͞okäyä`lē), river, c.1,000 mi (1,610 km) long, formed by the confluence of the ApurímacApurímac
, river, c.430 mi (690 km) long, rising in the Andes, S Peru. It flows generally northwest in a narrow valley. After joining the Mantaro River, the Apurímac becomes the Ene; after joining the Perené River, it becomes the Tambo.
..... Click the link for more information. and UrubambaUrubamba
, river, c.450 mi (720 km) long, rising in the Andes Mts., S Peru, and flowing generally north to join the Apurímac River to form the Ucayali. The Urubamba is extensively used for irrigation, and its valley is heavily populated; Cuzco, Peru, is located there.
..... Click the link for more information. rivers, E Peru, and flowing generally north through a mountain and jungle wilderness to the MarañónMarañón,
river, c.1,000 mi (1,600 km) long, rising in Lake Lauricaucha in the Cordillera Occidental, W central Peru. It flows generally NW, then E across the Andes to join the Ucayali River in NE Peru where it forms the Amazon River; some consider the
..... Click the link for more information. River, SW of Iquitos. It is a main headstream of the AmazonAmazon,
Port. Amazonas , world's second longest river, c.3,900 mi (6,280 km) long, formed by the junction in N Peru's Andes Mts. of two major headstreams, the Ucayali and the shorter Marañón.
..... Click the link for more information. River; the headwaters of the Apurímac are the most distant from the Amazon's mouth. The Ucayali is navigable for its entire course by small craft. It is an important communications link for IquitosIquitos
, city (1993 pop. 252,312), capital of Loreto dept., NE Peru, on the Amazon River, c.2,300 mi (3,700 km) from the Amazon's mouth. It is the farthest inland port of any considerable size in the world. With the boom in wild rubber at the beginning of the 20th cent.
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a river in Peru; a right tributary of the Amazon. The Ucayali is 1,950 km long and drains an area of 375,000 sq km. It is formed by the confluence of the Tambo (called the Apurimac in its upper course) and Urubamba rivers, which rise in the Central Andes. The Ucayali’s upper course lies in the mountains, and its lower course is in the Amazon Lowland, where the riverbed is wide, with many meanders. High water occurs from September through March. The mean flow rate is 12,600 cu m per sec. The Ucayali is navigable upstream as far as the city of Cumaria.