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 There are many factors, such as the source, the identification or the definition of the mouth, and the scale of measurement of the river length between source and mouth, that determine the precise meaning of "river length".

As a result, the length measurements of many rivers are only approximations (see also coastline paradox). In particular, there exists disagreement as to whether the Nile or the Amazon is the world's longest river.

what is the longest river in the world 2020

The Nile has traditionally been considered longer, but in recent years two unpublished studies have suggested that the Amazon is longer by measuring the river plus the adjacent Pará estuary and the longest connecting tidal canal.

A peer-reviewed article published in the International Journal of Digital Earth comes to the conclusion that the Nile is longer. Even when detailed maps are available, the length measurement is not always clear. A river may have multiple channels, or anabranches.

The length may depend on whether the center or the edge of the river is measured. It may not be clear how to measure the length through a lake. Seasonal and annual changes may alter both rivers and lakes.

Other factors that can change the length of a river include cycles of erosion and flooding, dams, levees, and channelization.  In addition, the length of meanders can change significantly over time due to natural or artificial cutoffs, when a new channel cuts across a narrow strip of land, bypassing a large river bend.




what is the longest river in the world 2020

what is the longest river in the world 2020

what is the longest river in the world 2020

what is the longest river in the world 2020

what is the longest river in the world 2020

what is the longest river in the world 2020



what is the longest river in the world 2020

what is the longest river in the world 2020

what is the longest river in the world 2020

what is the longest river in the world 2020

what is the longest river in the world 2020

what is the longest river in the world 2020

what is the longest river in the world 2020

For example, due to 18 cutoffs created between 1766 and 1885, the length of the Mississippi River from Cairo, Illinois, to New Orleans, Louisiana, was reduced by 351 kilometres (218 miles).

These points make it difficult, if not impossible, to get an accurate measurement of the length of a river. The varying accuracy and precision also makes it difficult to make length comparisons between different rivers without a degree of uncertainty. 

 

Nile River Meaning

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Ancient Egyptian Facts

 

 


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