![]() Delta Amacuro - 200 kilometres (120 miles) long.It flows in a northeast direction, from Atures rapids down to Piacoa in front of Barrancas. Lower Orinoco - 959 kilometres (596 miles) long, with a wide alluvial plain.The section ends at the Atures rapids, near the confluence with the Meta at Puerto Carreño. ![]() On both sides of the river are the mountains of the Guiana Shield. The river then flows northward along the Venezuelan–Colombian border. It flows down to the confluence with the Atabapo and Guaviare rivers at San Fernando de Atabapo. The first part of this section has a general westward direction. Middle Orinoco - 750 kilometres (470 miles) long.This section flows through mountainous landscape in a northwesterly direction. Upper Orinoco - 242 kilometres (150 miles) long, from its headwaters to the rapids Raudales de Guaharibos.The river can be divided into four stretches: The source of the river is at Cerro Delgado-Chalbaud, in the Parima Mountains. The course of the Orinoco forms a wide arc that surrounds the Guiana Shield. He reported on the river dolphins, and wrote extensively about the plants and animals he found. Alexander von Humboldt explored the basin in 1800. They were explored by German expeditions under Ambrosius Ehinger and his successors. The delta, and tributaries in the eastern llanos such as the Apure and Meta, were explored in the 16th century. It was explored by a French and Venezuelan team. Its source, however, was first explored by non-native people in 1951, 453 years later. The mouth of the Orinoco was recorded by Christopher Columbus on 1 August 1498. It is also home to Amazon river dolphins. This is one of the rarest reptiles in the world, with fewer than 250 living in the wild. It is the only habitat of the Orinoco crocodile. The Orinoco Basin is also ecologically important. The Orinoco and its tributaries are the main transport system for eastern and interior Venezuela and the llanos of Colombia. Its drainage basin, sometimes called the Orinoquia, covers 880,000 square kilometres (340,000 square miles), with 76.3% of it in Venezuela and the rest in Colombia. It is one of the longest rivers in South America, at 2,140 kilometres (1,330 miles). The Orinoco is a main river in northern South America. Mavaca, Sipapo, Ocamo, Ventuari, Suapure, Parguaza, Caura, Cuchivero, Aro, Caroní Tama Tama, Venezuela (Basin size: 37,870 km 2 (14,620 sq mi)Ĭasiquiare, Atabapo, Guaviare, Vichada, Tomo, Cinaruco, Capanaparo, Meta, Arauca, Apure, Guárico Geographical source (Orinoco-Guaviare-Guayabero-Papamene-Sorrento)
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