Casiquiare


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Casiquiare

(käsēkyä`rā), river, c.100 mi (160 km) long, S Venezuela. Also called the Canal Casiquiare, it is a branch of the Orinoco and flows SW to the Río Negro, thus linking the Orinoco and Amazon basins. The Casiquiare's flow was naturally diverted by the headward erosion of the Río Negro.

Casiquiare

 

a river in southern Venezuela. It measures 410 km long and drains an area of about 45, 000 sq km. In its upper course the Casiquiare accepts about one-third of the runoff of the Orinoco River and near the city of San Carlos joins with the Negro River of the Amazon system. The linking of the two largest rivers of South America is a classic example of the bifurcation of rivers. The Casiquiare is joined with the Orinocothrough a “canal,” a natural channel about 30 km long and witha gradient of up to 5 m, which serves to divert the water fromthe Orinoco to the Negro River basin.

References in periodicals archive ?
dissors on the left margin of Rio Negro, which has been found in Manaus and in the upper Rio Negro at Sao Gabriel da Cachoeira and along the Casiquiare channel (Friedmann 1948, Pinto 1978).
Original name Current name Imeri Napo Jau (1) Crypturellus Crypturellus casiguiare--H casiquiare (2) x x C.
Hongslo, 4 Feb 1981; USNM 269302 (2), Cano Manu tributary of Casiquiare Canal c.
Dicrossus filamentosus was collected from the middle Rio Negro between about the Rio Urubaxi and the Rio Daraa, and in the upper Rio Orinoco drainage, including the Rio Casiquiare drainage (Fig.
In reflecting upon the thousand-mile journey they took by boat to explore the Casiquiare River, which flows through present-day Colombia and Venezuela to unite the Orinoco and the Amazon river systems, Along the River That Flows Uphill authors Richard Starks and Miriam Murcutt must confront the inner narratives that have given them a passion for adventure and exploration but which have, at the same time, placed them in danger.
Funded by Geographical, the magazine of the Royal Geographical Society in London, to travel the length of the Casiquiare that apparently defies the laws of nature and flows uphill, Starks and Murcutt noted other paradoxes.
30The Casiquiare is a natural canal linking which two major river systems?
Paynter (1982) reported this site as 45 kilometers above the confluence of the Rio Casiquiare with the Rio Guainia.
Almost two centuries later, naturalist Alexander von Humboldt explored the Casiquiare River, which links the colossal Orinoco and Amazon rivers.