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re: Mid-Barataria Diversion
Posted on 5/11/21 at 1:05 pm to GREENHEAD22
Posted on 5/11/21 at 1:05 pm to GREENHEAD22
Depends on what type of sediment you’re talking about. Sand is the first evolution, then as the channel walks away, the finer materials stacks on top. The distance the sand will travel is basically set by a % slope (Generally speaking), and you’re talking on the order of 1,000s of feet, not really tens of miles.
2
Posted on 5/11/21 at 1:12 pm to jimbeam
I got ya, regardless, no sediment is carrying from the MS or Atch to Terrebonne.
Posted on 5/11/21 at 1:14 pm to jimbeam
I thought I said that! 
Posted on 5/11/21 at 1:18 pm to GREENHEAD22
Correct. I think their plan is more rebuild/protect the coast line, and reintroduce freshwater.
Posted on 5/11/21 at 1:27 pm to lotik
What we really need is a system of devices or infrastructure that keeps the sediment suspended for the whole river until it gets to where we need it. Then divert.
Even just an increase of say 20% would be huge.
Even just an increase of say 20% would be huge.
Posted on 5/11/21 at 1:45 pm to mikie421
quote:
What we really need is a system of devices or infrastructure that keeps the sediment suspended for the whole river until it gets to where we need it. Then divert. Even just an increase of say 20% would be huge.
Or in all those areas upstream that are silted in where they are constantly dredging what if they put that dredge material in a barge and ship it down River and build land with it
Posted on 5/11/21 at 2:02 pm to GREENHEAD22
quote:
east terrebonne
the problem with restoring easter terrebonne is lack of a sediment supply
Posted on 5/11/21 at 2:09 pm to Ron Cheramie
quote:The USACE is obligated to maintain the nav channel by the most cost effective method possible. Sometimes this includes beneficial use with the material, but not always. They would need outside dedicated funds in many cases to utilize the sediment to build marsh, and this has been done before. But the money has to come from somewhere (CPRA, etc.)
Or in all those areas upstream that are silted in where they are constantly dredging what if they put that dredge material in a barge and ship it down River and build land with it
Posted on 5/11/21 at 2:13 pm to Icansee4miles
quote:
You do realize floating marsh itself captures more sediment and eventually builds land? I watched Spanish Pass fill up with water lillys and become solid ground in only 2-3 years in the 1980’s as they captured and held sediment
The marsh around Tiger Pass could use a bunch of lilly's. There is no land left on either side. I grew up duck hunting down there and iys wide open now.
Posted on 5/12/21 at 6:06 am to jimbeam
This mid-barataria diversion is being designed as a "sediment" diversion and will only operate during certain time of the year. They will pull water a certain amount of water to allow for the maximum amount of sediment transport. I believe the initial design is 25' deep by 300' wide and it comes in right around the Ironton area just south of the refinery.
Posted on 5/12/21 at 6:37 am to EveryoneGetsATrophy
quote:actual lillys or hyacinths?
quote:
You do realize floating marsh itself captures more sediment and eventually builds land? I watched Spanish Pass fill up with water lillys and become solid ground in only 2-3 years in the 1980’s as they captured and held sediment
The marsh around Tiger Pass could use a bunch of lilly's. There is no land left on either side. I grew up duck hunting down there and iys wide open now.
Posted on 5/12/21 at 8:26 am to Elusiveporpi
quote:
They need to adapt
If you’ve ever been to or watched an Oyster Task Force meeting, the word “adapt” makes them very angry.
Posted on 5/12/21 at 8:35 am to WizardSleeve
quote:
CPRA
They have an interactive map with projects at their site, which doesn’t appear to want to work on a phone but works on a PC.
Posted on 5/12/21 at 8:47 am to Ron Cheramie
quote:
What we really need is a system of devices or infrastructure that keeps the sediment suspended for the whole river until it gets to where we need it. Then divert. Even just an increase of say 20% would be huge.
Or in all those areas upstream that are silted in where they are constantly dredging what if they put that dredge material in a barge and ship it down River and build land with it
There is current discussions ongoing about this exact thing.
Posted on 5/12/21 at 8:48 am to Tiger 79
quote:
During natural flooding, the river built ridges of sand along its banks that's why its highest next to the river.
Back in the day before the levees, it must have been something to see the sheet flow over the land when the rivers flooded
Posted on 5/12/21 at 8:54 am to chew4219
quote:nah, let just barge it out into the gulf where its less hazardous
Or in all those areas upstream that are silted in where they are constantly dredging what if they put that dredge material in a barge and ship it down River and build land with it
Posted on 5/12/21 at 8:57 am to mikie421
quote:
What we really need is a system of devices or infrastructure that keeps the sediment suspended for the whole river until it gets to where we need it. Then divert.
Even just an increase of say 20% would be huge.
If I recall correctly, the amount of sediment in the river is reduced from historical levels (by something like 30-50%, I think) because of the various dams and locks upstream, throughout the entire drainage.
So, there is also that in play.
This post was edited on 5/12/21 at 8:58 am
Posted on 5/12/21 at 9:00 am to chew4219
quote:
There is current discussions ongoing about this exact thing.
Good. Hopefully the two agencies can get it going. It just seems so elementary
CPRA: we need more sediment
USACE: what to do with all this sediment?
This post was edited on 5/12/21 at 9:02 am
Posted on 5/12/21 at 9:16 am to Ron Cheramie
After having dealt with dredgers and engineers from all over the country, “disposal” is like you said, usually the problem. And here we are in La looking for quality sediment and always looking to dredge more
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