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Apurímac(apo͞orē`mäk), 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. When it joins the 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. River, it becomes the UcayaliUcayali
, river, c.1,000 mi (1,610 km) long, formed by the confluence of the Apurímac and Urubamba rivers, E Peru, and flowing generally north through a mountain and jungle wilderness to the Marañón River, SW of Iquitos.
..... Click the link for more information. , which is one of the main headstreams 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. . The headwaters of the Apurímac, which rise from glacial meltwater on Nevado Mismi, were determined by a 2000 expedition to the most distant from the mouth of the Amazon.