large rivers of Peru begin in the Andes and flow through the Montana; all are part of the Amazon system. Among them are the Ucayali and Maranon, the two chief headstreams of the Amazon, and the Putumayo, Napo, Pastaza, Huallaga, Apurimac, Urubamba, and Madre de Dios. The Amazon proper begins just above the city of Iquitos. A number of rivers, all of them short, drain from the Andes to the Pacific. Most of them dry up during part of he year, but their waters are extremely important for irrigation along…
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