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re: What happens after the Mississippi changes course
Posted on 10/30/19 at 8:50 pm to white perch
Posted on 10/30/19 at 8:50 pm to white perch
(no message)
This post was edited on 1/10/21 at 3:32 pm
0
Posted on 10/30/19 at 9:20 pm to white perch
quote:
It will happen eventually. When - I don’t think we can accurately estimate this. Yearly flooding has been getting worse in the delta. That’s a lot of backed up water and the atchafalya is just sitting there ~15 feet lower elevation than the Mississippi just waiting for a small breach in a levee.
Well the levee isn’t what holds the river in place, the mat sinking units keep the river channel where it needs to be. A catastrophic flood would for sure happen, but the river would stay the course once the water level returned to normal.
Posted on 10/30/19 at 10:12 pm to white perch
The folks that say “ they will fix it back up when the water goes down “ don’t have a clue. They don’t understand elevations,geography and the basics of river bed avulsion.
This post was edited on 10/30/19 at 10:14 pm
Posted on 10/30/19 at 10:12 pm to Kafka
MC would be sacrificed for the good of the country
Posted on 10/30/19 at 11:10 pm to jimbeam
You disappoint me. Less levees, more flooding, less people, sounds good to me.
FYI, I am slightly drunk and my yearning for an America the way Lewis and Clark saw it is shining through.
FYI, I am slightly drunk and my yearning for an America the way Lewis and Clark saw it is shining through.
Posted on 10/30/19 at 11:16 pm to Polycarp
quote:
Laffy gonna be a big port?
Lmao! Man these threads bring out some dumbass comments.
Posted on 10/31/19 at 7:49 am to Bigfishchoupique
quote:
The folks that say “ they will fix it back up when the water goes down “ don’t have a clue. They don’t understand elevations,geography and the basics of river bed avulsion.
This all damn day long.
It’s not just about containing a river. The actual river process, the delta, is a much larger and constantly changing process.
Posted on 10/31/19 at 7:56 am to The Boat
quote:
Yeah I love in these threads how everyone acts like we'd just throw our hands up and say oh well.
When the river drops in the fall they'd rebuild the structure like they built it the first time.
The definition of insanity is repeating the same action and expecting different results.
Posted on 10/31/19 at 8:01 am to CitizenK
quote:
MC would go bye bye.
Nah. It may flood temporarily, but the river bed would also scour a ton and allow more water to flow though at lower sea level heights.
Posted on 10/31/19 at 8:03 am to Bigfishchoupique
quote:
The folks that say “ they will fix it back up when the water goes down “ don’t have a clue. They don’t understand elevations,geography and the basics of river bed avulsion.
Fixing it when the water goes down implies it's a problem that could be totally prevented altogether. I simply don't believe that.
Posted on 10/31/19 at 8:12 am to Emteein
quote:
A catastrophic flood would for sure happen, but the river would stay the course once the water level returned to normal.
If ORCS breaks and water starts to divert down the Atchafalaya, doing nothing will not bring the Miss River back.
Posted on 10/31/19 at 9:35 am to NYNolaguy1
quote:
If ORCS breaks and water starts to divert down the Atchafalaya, doing nothing will not bring the Miss River back.
If the ORCS breaks, or any levee structure for that matter, and a body of water as large as the Mississippi finds a more down hill path (more energy efficient, less resistance) it will take that down hill path (the Atchafalya) and there’s nothing that can be done to stop it.
Posted on 10/31/19 at 9:38 am to NYNolaguy1
quote:
If ORCS breaks and water starts to divert down the Atchafalaya, doing nothing will not bring the Miss River back.
Obviously the ORCS would have to be repaired once the river returned to the normal level. There actually should be a greater emphasis on reinforcing or replacing the structure by the federal gov. The river isn't just a louisiana problem, its a US problem.
The main point of my post was actually just to shed light on the mat sinking operations done every year that actually keep the river in place more so than the levees which primary function is flood control. The ORCS is big glaring weak spot, but if the mat sinkers didn't reinforce the down side of the bends in the river the river would erode its banks and change course as well.
Posted on 10/31/19 at 9:39 am to white perch
Why wouldn't the corp just get dredging it like they do now?
Posted on 10/31/19 at 9:40 am to slackster
quote:
quote: MC would go bye bye.quote:
Nah. It may flood temporarily, but the river bed would also scour a ton and allow more water to flow though at lower sea level heights.
This
Posted on 10/31/19 at 9:46 am to Emteein
quote:
Obviously the ORCS would have to be repaired once the river returned to the normal level.
I mean sure if theres enough political will and unlimited resources available, you can do anything.
The better question is if its prudent to fight mother nature with progressively higher costs each time something goes wrong.
Posted on 10/31/19 at 9:56 am to OLDBEACHCOMBER
River bed avulsion,river bed avulsion. Everyone has to understand avulsion to have any kind of intelligent discussion.
Posted on 10/31/19 at 10:06 am to NYNolaguy1
quote:
I mean sure if theres enough political will and unlimited resources available, you can do anything.
The better question is if its prudent to fight mother nature with progressively higher costs each time something goes wrong.
Are you serious? Baton Rouge and New Orleans Ports are two of the busiest ports in the United States, not to mention all of the chemical plants along the river that rely on the river's current navigational channel.
The Nation would suffer tremendously, it is worth all the money.
Posted on 10/31/19 at 10:06 am to Bigfishchoupique
I rode down the Atchafalaya last week to meet a barge. Really incredible to see an estuary more or less left as nature intended. I did see one deep arse spot if 130 ft of water that kind of surprised me. It is not a matter of if but when this occurs. As the river bed silts in the MS takes less flow to equal same rise. There aren’t enough dredges or $$$ to stop this from happening.
ETA: the MS current course would still have flow as not all the water will go out the atchafalaya. Hell Houston is already light years ahead of Nola in terms of shipping since they are so much closer to the gulf. A ship has to go upriver 70 damn miles just to get to Nola that is far from ideal as far as ports go.
ETA: the MS current course would still have flow as not all the water will go out the atchafalaya. Hell Houston is already light years ahead of Nola in terms of shipping since they are so much closer to the gulf. A ship has to go upriver 70 damn miles just to get to Nola that is far from ideal as far as ports go.
This post was edited on 10/31/19 at 10:09 am
Posted on 10/31/19 at 10:07 am to NYNolaguy1
You have no idea what it takes to divert a river. Read some about the construction of the Hoover Dam. Learn about how they diverted the Colorado and the cut off the diversion. We don’t have the geology, geography and a bunch of other things to pull off putting the Mississippi River back into its prior channel if it diverts to the Atchafalaya. Everybody needs to become well read on this stuff. Most folks don’t and can’t comprehend the big picture.
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