Ucayali

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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.
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 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.
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 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
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 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.
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 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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.

Ucayali

 

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.

Ucayali

a river in E Peru, flowing north into the Mara??n above Iquitos. Length: 1600 km (1000 miles)
References in periodicals archive ?
Palms and palm communities in the upper Ucayali river valley--a little-known region in the Amazon basin.
The Vilcabamba range includes two indigenous person communal reserves and a national park, and contains the Apurimac Reserved Zone, the source of more than 50 rivers that drain into the Amazon basin via the Ucayali River. According to the International Union for Conservation of Nature, "the Vilcabamba region harbors remarkable tree, bird, insect, and small mammal biodiversity, much of which remains to be documented by science."
Among the places that made their mark were Machu Picchu; a leper colony on the Ucayali River in Amazonian Peru; and Chuquicamata, the open-cut copper mine that was a stronghold of the Chilean Communist Party.
For instance, along the floodplains in the Lower Ucayali River basin, Peru, forest succession progresses rapidly on top of the levees, but is suppressed in the intervening depressions until sufficient sediment buildup counteracts the detrimental effects of flooding (Lamotte 1990).
Forest material was initially found by park rangers from the Reserve in the Cunchuri sub-sector within the protected area; However, prior to their intervention, the alleged illegal loggers moved the wood logs of the Culama species to the banks of the Ucayali River near the community of San Jos de Pacache, buffer zone of said protected area.
For instance, surveys in the upper Ucayali river valley in northeastern Amazonian Peru recorded 56 palms species in only 35 transects covering the same four habitats (Balslev et al.
This search saw him travel to South America, deep into the Amazon rainforest where he was fortunate to spend time with the Shamans of the Shipibo-Conibo tribe, an indigenous people along the Ucayali River of Peru.
REPRODUCTIVE PARAMETERS OF LLAMBINA POTAMORHINA ALTAMAZONICA (CHARACIFORMES: CURIMATIDAE) IN THE UCAYALI RIVER
Utilization of palms in eleven mestizo villages of the Peruvian Amazon (Ucayali River, Department of Loreto).
The northeastern limit in the Ucayali river valley is not well defined yet.
This species was not found in CCNN along the Ucayali River or in CFA.
Two species grow in Brazil and Peru (Astrocaryum faranae is found from the upper Moa river in Acre, the westernmost region of Brazil, to the upper Huallaga river valley in Peru, and Astrocaryum javarense, found in the lower Jauari river valley in Brazil, extends to the lower Ucayali river valley in the neighbouring Peruvian region).