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Ranking of world's longest rivers

by mech-eng
Tags: longest, ranking, rivers, world
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mech-eng
#1
Jun23-14, 12:49 AM
P: 151
Hi. Usually Nile river is assumed as world's longest river with its 4250 miles length but sometimes Mississippi River is assumed world's longest river. River Amazon is world second longest river with its 4000 miles length. So what should be the true ranking?
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davenn
#2
Jun23-14, 01:04 AM
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4.25 miles isn't very long

what does google have to say in references ?


D
mech-eng
#3
Jun23-14, 01:09 AM
P: 151
This is from Wikipedia: "The Nile (Arabic: النيل‎, Eg. en-Nīl, Std. an-Nīl; Coptic: ⲫⲓⲁⲣⲱ, P(h)iaro; Ancient Egyptian: Ḥ'pī and Iteru) is a major north-flowing river in northeastern Africa, generally regarded as the longest river in the world.[2] It is 6,853 km (4,258 miles) long. " And it is strange that it is generally regarded as the longest then Mississippi River should sometimes be regarded as the longest.

jtbell
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Jun23-14, 01:16 AM
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Ranking of world's longest rivers

Quote Quote by mech-eng View Post
but sometimes Mississippi River is assumed world's longest river.
Please give a specific source for this. Who says that the Mississippi is the world's longest river?
mech-eng
#5
Jun23-14, 01:23 AM
P: 151
Quote Quote by jtbell View Post
Please give a specific source for this. Who says that the Mississippi is the world's longest river?
Sorry, it seems it is wrong that Mississippi is the longest. But why does
wikipedia say the Nile is generally longest?
SteamKing
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Jun23-14, 02:55 AM
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Trying to fix a length to a river is difficult. Rivers can change the course of their flow over time. For some rivers, like the Amazon, parts of it may be poorly mapped, and the headwaters in the Andes Mountains may be poorly explored.

Depending on the reference cited, the Mississippi-Missouri river may be No. 3 (http://www.infoplease.com/toptens/worldrivers.html) or No. 4 (http://en.wikipedia.org/wiki/List_of_rivers_by_length).

There is still some doubt that the headwaters of the Nile have been reached for certain. The latest expedition to what was thought to be the source of the White Nile took place in 2010.

http://en.wikipedia.org/wiki/Nile
Ophiolite
#7
Jun23-14, 04:33 AM
P: 274
Volume of discharge seems more important than length. On that basis the Amazon wins outright. It is an order of magnitude greater than the number two river (Congo) and two orders of magnitude more than the Nile.

See Wikipedia
ratagonia
#8
Jun30-14, 05:32 PM
P: 1
Wikipedia does not "say" anything. It references sources that say things. So - check the footnotes, which reference the Encyclopedia Britannica. When it does not reference sources, it is being non-encyclopedic, and the information should be treated with suspicion.

Different pages on the wiki may be linked to different references which may say contradictory things.

Tom
mech-eng
#9
Jul11-14, 09:28 AM
P: 151
I want to learn where is starting point of Amur River but I can not do a good search. Can you help me with correct
parameters for I can do it.
HallsofIvy
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Jul11-14, 10:28 AM
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At some point in the early exploration of what is now the United States by people of European descent some one decided that the Missouri river ran into the Mississippi which then continued to the gulf of Mexico. It could as easily have been decided that the Mississippi ran into the Missouri which then continued to the gulf of Mexico. Had that been done, since the distance from the confluence to the head of the Missouri is greater than the distance from the confluence to the head of the Mississippi, the "Missouri", now including the distance from the confluence to the gulf of Mexico, would be the longest river in the world. Some texts will refer to the "Mississippi- Missouri complex", to mean just that, as the longest river.
jtbell
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Jul11-14, 06:10 PM
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If you look at the Mississippi-Missouri confluence on Google Maps or Google Earth, it seems "obvious" that the Mississippi goes "straight through" and the Missouri "runs into" it.

On the other hand, if you look at the Mississippi-Ohio confluence at Cairo IL, it seems equally obvious to me that the Ohio goes "straight through" to the lower Mississippi and the middle Mississippi "runs into" it. According to http://en.wikipedia.org/wiki/Mississippi_River the Ohio also carries a larger volume of water than the middle Mississippi.

So there's some degree of historical arbitrariness in terminology.

(Disclaimer: I grew up in Ohio, so I have a slight bias here. )
SteamKing
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Jul12-14, 06:08 AM
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Quote Quote by mech-eng View Post
I want to learn where is starting point of Amur River but I can not do a good search. Can you help me with correct
parameters for I can do it.
You didn't start your search with this article perhaps?

http://en.wikipedia.org/wiki/Amur_River


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