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The Amazon River (UK: / ˈ æ m ə z ən /, US: / ˈ æ m ə z ɒ n /; Spanish: Río Amazonas, Portuguese: Rio Amazonas) in South America is the largest river by discharge volume of water in the world, and the longest or second-longest river system in the world, a title which is disputed with the Nile.
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The average flow rate at the mouth of the Amazon is sufficient to fill more than 83 such pools each second. The estimated global total for all rivers is 1.2 × 10 6 m 3 /s (43 million cu ft/s), [ 1 ] of which the Amazon would be approximately 18%.
The Rio Negro (Spanish: Río Negro [ˈri.o ˈneɣɾo] "Black River"), or Guainía as it is known in its upper part, is the largest left tributary of the Amazon River (accounting for about 14% of the water in the Amazon basin), the largest blackwater river in the world, [8] and one of the world's ten largest rivers by average discharge.
The Marajó várzea is at the mouth of the Amazon River. It covers coastal areas of the states of Pará and Amapá , with an area of 8,857,759 hectares (21,888,000 acres). [ 1 ] Water levels are affected by freshwater flowing down the river and by tidal flows from the Atlantic Ocean . [ 2 ]
The mouth of the Amazon River The Amazon basin is the part of South America drained by the Amazon River and its tributaries . The Amazon drainage basin covers an area of about 7,000,000 km 2 (2,700,000 sq mi), [ 1 ] or about 35.5 percent of the South American continent.
The Amazon River is the largest river in the world in terms of its flow rate. In addition, it is the second longest river, measuring 6,575 km (4,086 mi) [3] from its source to the mouth of the Atlantic Ocean [4] after the Nile River which is considered to be the longest river in the world (see Source of the Nile River), although there is some dispute.
A river in the Amazon. Along the Amazon River and many of its tributaries, high annual rainfall that occurs mostly within a rainy season results in extensive seasonal flooding of areas from stream and river discharge. [6] The result is a 10–15 m (33–49 ft) rise in water level, with nutrient rich waters.