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re: comparison of the Amazon, Nile and Mississippi
Posted on 7/6/21 at 12:38 pm to Oilfieldbiology
Posted on 7/6/21 at 12:38 pm to Oilfieldbiology
quote:
OP says MS is 16,200 m^3/s while the Amazon is ~175,000 m^3/s. That’s about 10x
I think he was reacting to the observation that it was 10 x the Nile and MS. It’s about 60 times the Nile.
0
Posted on 7/6/21 at 12:41 pm to Oilfieldbiology
quote:
I had no idea the damn thing was 2-4 miles wide in the dry season, and while 30 miles is much less than 50 miles, that is still an absolutely insane size of a river. Holy hell I knew the Amazon was big, but I didn’t realize it was THAT big
There's also a "river" underneath the Amazon, the Hamza, although it's more of an aquifer.
quote:
The Hamza and the Amazon are the two main drainage systems for the Amazon Basin. The reported flow rate of the Hamza, at approximately 3,000 cubic metres (110,000 cu ft) per second, is 3% of the Amazon's.[3] It runs west to east, some 4,000 metres (13,000 ft) below the Earth's surface, and follows roughly the path of the Amazon River.[6] The Hamza born in Andes and empties in the Atlantic Ocean, deep under the surface. Its own water has a high salt content.[7]
It flows from the Andean foothills to the Atlantic coast in a nearly west-to-east direction like the Amazon River. A combination of seismic data and anomalous temperature variation with depth measured in 241 inactive oil wells helped locate the aquifer. Except for the flow direction, the Amazon and the Hamza have very different characteristics. The most obvious ones are their width and flow speed. While the Amazon is 1 kilometre (0.62 mi) to 100 kilometres (62 mi) wide, the Hamza is 200 kilometres (120 mi) to 400 kilometres (250 mi) in width. But the flow speed is 5 metres per second (16 ft/s) in the Amazon and less than 1 millimetre per second (0.039 in/s) speed in the Hamza.[4]
Posted on 7/6/21 at 12:42 pm to Oilfieldbiology
quote:
OP says MS is 16,200 m^3/s while the Amazon is ~175,000 m^3/s. That’s about 10x
10x the flow, but it's not going that much faster because the cross section is so huge.
If anything the Amazon probably flows slower than the Mississippi.
ETA: USGS Report on the Amazon River Page 7 has a cross sectional comparison of the Mississippi and Amazon.
EATA: The Mississippi averages 3mph flow speed at the gulf outlet, and the Amazon is around 1.5mph. So that would be about 20x the cross section of the Mississippi to get 10x the flow volume. If my math is right... it's been a while.
This post was edited on 7/6/21 at 12:47 pm
Posted on 7/6/21 at 12:44 pm to iAmBatman
quote:
can you explain how the water flows uphill?
You seem like a special Batman
This post was edited on 7/6/21 at 12:48 pm
Posted on 7/6/21 at 12:46 pm to Volvagia
quote:
At its narrowest it’s over a half mile wide, and is over 50 miles wide for most of the run.
I never knew it was that large. I always thought it was relative to the Mississippi in girth.
50 miles wide for most of the run is almost hard to wrap your head around. You can't see the opposite shore at that point.
Posted on 7/6/21 at 1:02 pm to LSUBoo
quote:
It's much larger than 10x. MUCH.
The Amazon has more flow than the 2nd-8th largest combined. None of which are the Mississippi (14th most flow) or the Nile (which is way down at 95th place).
Is the Nile the most overrated river?
Posted on 7/6/21 at 1:04 pm to Dire Wolf
It’s because as young lads we were all so preoccupied and concerned with length. We didn’t know it’s girth that counts.
Posted on 7/6/21 at 1:07 pm to real turf fan
The Missouri River is longer than the Mississippi River is from their junction near St Louis. The whole system should have been named the Missouri River.
quote:
Although nominally considered a tributary of the Mississippi, the Missouri River above the confluence is much longer and carries a comparable volume of water.
This post was edited on 7/6/21 at 1:14 pm
Posted on 7/6/21 at 1:12 pm to TigerFanatic99
quote:Google is telling me the Amazon River is 7 miles wide at its widest.
I never knew it was that large. I always thought it was relative to the Mississippi in girth.
50 miles wide for most of the run is almost hard to wrap your head around. You can't see the opposite shore at that point.
Not 50 for most of its run
Posted on 7/6/21 at 1:17 pm to ReauxlTide222
2-6 in the dry season, but up to 30 miles during the wet season
Posted on 7/6/21 at 1:26 pm to NATidefan
Chuuuu boy tink bout da size dem Catfish
Posted on 7/6/21 at 1:28 pm to MrWalkingMan
quote:
It would be very embarrassing for you if you actually believed that’s how gravity worked
Posted on 7/6/21 at 1:29 pm to Korkstand
Not exactly true
Posted on 7/6/21 at 1:36 pm to The Boat
In a book I listened to through audible, the author states that the Mississippi River has more navigable water uninterrupted by rapids than the next 4 longest systems combined. That you can put goods on a barge as far west as the Rockies and get it as fas as Pennsylvania without ever having to take it off a barge.
Posted on 7/6/21 at 1:37 pm to Oilfieldbiology
quote:
In a book I listened to through audible, the author states that the Mississippi River has more navigable water uninterrupted by rapids than the next 4 longest systems combined. That you can put goods on a barge as far west as the Rockies and get it as fas as Pennsylvania without ever having to take it off a barge.
Dam!
Posted on 7/6/21 at 1:41 pm to Y.A. Tittle
quote:
Determining the "age" of a river is a bit of an inexact science, but there are several that are purported to be older than the Nile, including two in the Appalachians (the French Broad and the New), which may be about 10 times as old as the Nile (30 million vs 300+ million years old).
This is correct!
Posted on 7/6/21 at 1:42 pm to LCA131
quote:
Egypt is pretty much a sewer
Explain Alabama, then.
Posted on 7/6/21 at 1:43 pm to dirtytigers
quote:
Chuuuu boy tink bout da size dem Catfish
The Amazon has about 15 families of catfish, with some being caught up to around 300lbs.
Posted on 7/6/21 at 1:43 pm to Tigris
I understand sarcasm just fine. But I also know that some people are just that dumb and couldn’t find the Nile on a map, let alone the continent of Africa.
It would not surprise me to find that some people actually believe riverine topography is determined by cardinal directionality
Posted on 7/6/21 at 1:49 pm to Oilfieldbiology
quote:
I had no idea the damn thing was 2-4 miles wide in the dry season, and while 30 miles is much less than 50 miles, that is still an absolutely insane size of a river. Holy hell I knew the Amazon was big, but I didn’t realize it was THAT big
For local reference Lake Pontchartrain is 24 miles wide.
Imagine a river as wide as the lake
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