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1
Posted on 7/10/19 at 5:06 pm to The Boat
quote:
I'd rather Bonnet Carre fail than levees breaching in New Orleans. As long as the Bonnet Carre levees hold it wouldn't matter.
Could those levees hold though? It would create a significant current event that would be unlike anything its experienced before.
Posted on 7/10/19 at 5:06 pm to JudgeHolden
quote:. You have more faith in our activists judges than I do. These frickers won’t even enforce our border laws.
And they’ll say hello to the feds’ little friend.
It’s called the Flood Control Act of 1928.
Absolute immunity.
Posted on 7/10/19 at 5:12 pm to Ponchy Tiger
They’ve enforced this one.
Posted on 7/10/19 at 5:13 pm to Major Dutch Schaefer
Bonne Carre is going to open up more bays.
Posted on 7/10/19 at 5:15 pm to Ponchy Tiger
Whats the armor (concrete coating) situation along that stretch of river from Mereaux to Lower 9?
If its going to get overtopped scouring will be a concern.
If its going to get overtopped scouring will be a concern.
Posted on 7/10/19 at 5:17 pm to NYNolaguy1
At 20 feet lower 9 levees will get topped.
Posted on 7/10/19 at 5:38 pm to Major Dutch Schaefer
The crevasse of 2019!
Posted on 7/10/19 at 5:46 pm to t00f
Under a worse case scenario i’m curious what would happen. I believe and this could be incorrect that the earthen levees are only needed at some certain height and at most times serve no actual flood control. If the surge will only be a few hour event what happens if a breach or overtopping does occur. Of course you have flooding but how much. I don’t see this being Katrina since the flow will not have time to fill up everything over days.
I hope i remain curious and don’t actually find out but i’m sure there is a model out there somewhere that answers the question.
I hope i remain curious and don’t actually find out but i’m sure there is a model out there somewhere that answers the question.
Posted on 7/10/19 at 5:48 pm to LSU5508
quote:
Under a worse case scenario i’m curious what would happen. I believe and this could be incorrect that the earthen levees are only needed at some certain height and at most times serve no actual flood control. If the surge will only be a few hour event what happens if a breach or overtopping does occur. Of course you have flooding but how much. I don’t see this being Katrina since the flow will not have time to fill up everything over days.
The rise and fall looks pretty quick but it all depends on it the levees hold. Overtopping puts a lot of stress on them and if the levees fail then it becomes a Katrina.
Posted on 7/10/19 at 5:51 pm to LSU5508
Not even close to Katrina and they are closing all the flood gates. All gates should be closed by tomorrow night.
Posted on 7/10/19 at 5:52 pm to The Boat
quote:
The rise and fall looks pretty quick but it all depends on it the levees hold. Overtopping puts a lot of stress on them and if the levees fail then it becomes a Katrina.
Even if a levee fails after the surge falls wouldn't the water retreat far behind the earthen levees?
Posted on 7/10/19 at 5:56 pm to LSU5508
quote:
Even if a levee fails after the surge falls wouldn't the water retreat far behind the earthen levees?
It depends on how badly the levees are damaged. The river is at 16 feet so it's really high and will still be high after the surge recedes.
Posted on 7/10/19 at 5:59 pm to The Boat
quote:
It depends on how badly the levees are damaged. The river is at 16 feet so it's really high and will still be high after the surge recedes.
Thanks I haven't been to a levee on the River in a while. I just know under normal operations the earthen portion is usually a good bit away. Haven't been under the current river levels though. I'm also only familiar Nola.
Posted on 7/10/19 at 6:07 pm to LSU5508
How concerned should someone be in that lower 9 to meraux river levee zone
Posted on 7/10/19 at 6:07 pm to t00f
quote:
Not even close to Katrina and they are closing all the flood gates. All gates should be closed by tomorrow night.
What does closing the flood gates do? Sorry, obviously not super familiar with this.
Posted on 7/10/19 at 6:12 pm to MrLSU
Not sure how anyone can look at this graphic and justify living in the area? At some point, nature will win this battle.
Posted on 7/10/19 at 6:13 pm to LSU5508
quote:
Even if a levee fails after the surge falls wouldn't the water retreat far behind the earthen levees?
If a full levee breach happens via overtopping and scouring you will have the ms river draining into NOLA/Chalmette.
Under the worst case it doesnt stop because the bottom of the levee breach would presumably be below the top of the base river (+/- 15.8' atm), and because NOLa elevation is way below that of the river levee.
That's the real worst case scenario.
Posted on 7/10/19 at 6:17 pm to 4cubbies
quote:Seals off the hurricane surge protection system. Nothing to do with the MS River level. But closing the flood gates is why most of Plaquemines Parish is being put under a mandatory evacuation because once they close the gates, anyone on the outside who stayed is stuck there until the storm passes.
What does closing the flood gates do? Sorry, obviously not super familiar with this.
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