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Posted on 2/25/18 at 10:35 am to NYNolaguy1
quote:
Tldr: tearing down the LA levees will do nothing to help coastal erosion.
It will certainly help, but it won't solve it alone.
Posted on 2/25/18 at 10:37 am to tLSU
quote:
Give us a list of those. I assume the NOAA, NASA, and the EPA are out? LSU and all universities out?
What are we down to, Alex Jones?
This is my main gripe with climate change - the cause of it has become so political that actual facts like historical sea level rise are completely ignore by folks on the right.
I don't blame then when it's shoved down their throat, but it's clouded real facts too.
Posted on 2/25/18 at 10:40 am to Cosmo
quote:
Sea levels are not rising. Land is simply being lost.
False. Completely agree with everything else though. Weird how you could know everything else and get this part wrong
Posted on 2/25/18 at 10:40 am to junior
quote:
we can't afford $480,000 to relocate everyone who will loose their home in the next 50 years.
That # is insane IMO
There is no reason it should cost that much to move 40 miles
We are fricked until the government quits wasting taxpayers money
Posted on 2/25/18 at 10:41 am to slackster
(no message)
This post was edited on 3/24/19 at 11:37 pm
Posted on 2/25/18 at 10:44 am to LSUJML
One of the main reasons they got that much money is because they are considered a native American tribe
Posted on 2/25/18 at 10:56 am to LSUTigersVCURams
Here we go 
quote:False
Tldr: tearing down the LA levees will do nothing to help coastal erosion.
This post was edited on 2/25/18 at 11:00 am
Posted on 2/25/18 at 10:58 am to schwartzy
quote:
the people of Pilottown and Boothville will need to move so the area can be flooded. Silt that floods out there can at least potentially build land.
I can see you don’t know much about that area. Pilottown is south of Boothville and has never had levees. Houses were built on pilings to allow for the high river. Not much left to it after hurricane Katrina and no more permanent residents.
Posted on 2/25/18 at 11:03 am to tLSU
quote:
To suggest that the sea levels aren't rising, or that Louisiana's coastal problems have nothing to do with it, is moronic
I mean, shite, 100 million years ago, sea levels were 250m higher than they are today. They'll continue to move.
Planning for the worst would be a reasonable next step, but most of this state won't even accept the fact that they're rising.
Posted on 2/25/18 at 11:04 am to schwartzy
Yup. Our coast is eroding and will continue to erode just to keep Plaquemines fricking Parish dry.
Posted on 2/25/18 at 11:14 am to Loungefly85
quote:
Yup. Our coast is eroding and will continue to erode just to keep Plaquemines fricking Parish dry.
It's a little more complicated than that. Keeping the majority of the Mississippi River going through Baton Rouge and New Orleans is a major culprit too.
Look how much land has been built in/around the Atchafalaya and Wax deltas in the last 20 years:
Meanwhile, we're dumping the Mississippi River silt into 100m water depths instead of sub-10m depths along the rest of the coast.
Posted on 2/25/18 at 11:26 am to choupiquesushi
quote:
The sea has risen by 5 inches since 1900
Has the sea really risen that high or has the land subsided more?
The more I look at it we can claim minor sea level changes. But no more than what the tide changes. But I think geological factors are more at play than sea level change.
If you can look up a map of the faults of south Louisiana you can see there is a fault nearly straight across coastal Louisiana called the Golden Meadow fault. Every thing south of it is in bad shape and I would say sinking, but north of it there are ridges and it is much healthier, but that too is at risk of starting to be lost.
There also other factors such as the number of canals that have been cut through natural ridges that make the problem worse.
I can remember going trawling west of Leeville in the canals by the Texaco dock and seeing a forest of trees. Now some of that is open water.
Posted on 2/25/18 at 11:36 am to Tarps99
quote:
Has the sea really risen that high or has the land subsided more?
These are global readings compiled into one data set. It corrects for any land accumulation or subsidence. When scientists say sea level is rising it isn’t coming from a single monitoring station on Grand Isle.
quote:
If you can look up a map of the faults of south Louisiana you can see there is a fault nearly straight across coastal Louisiana called the Golden Meadow fault. Every thing south of it is in bad shape and I would say sinking, but north of it there are ridges and it is much healthier, but that too is at risk of starting to be lost.
There is also the Michoud Fault on the east side of NOLA. Again, these features have always been contributing to evolution of coastal La. Sediment loads in the MS River were historically high enough to out compete these forces. Also, cutting canals through the marshes creates more surface area that decreases their resistance to storms. Therefore there are multiple factors both natural and manmade working against our coastline.
The hope is that the marsh is resilient enough that removing anthropogenic stresses will allow it to overcome natural erosion processes and enable the wetlands to rebuild on their own.
This post was edited on 2/25/18 at 11:46 am
Posted on 2/25/18 at 12:00 pm to fischd1
quote:
We need to divert the Miss River to build back our coast.
The other problem is the Mississippi River is only carrying a fraction of the sediment it once did due to upriver dams and locks.
For this reason, the large sediment diversion projects at Caenarven have not seemed to do anything positive.
The only solution I've heard that makes much sense is the creation of a sediment pipeline system. Basically, there would be a system to pipe sediment from spots along the Mississippi River (which the Army Corps dredges regularly) to spots where sediment is needed along the coast. Whenever the Corps does their dredging, they would simply hook their hoses up to the pipeline and send the sediment where it needs to go rather than dumping it off the shelf.
Posted on 2/25/18 at 12:03 pm to kingbob
quote:
The only solution I've heard that makes much sense is the creation of a sediment pipeline system. Basically, there would be a system to pipe sediment from spots along the Mississippi River (which the Army Corps dredges regularly) to spots where sediment is needed along the coast. Whenever the Corps does their dredging, they would simply hook their hoses up to the pipeline and send the sediment where it needs to go rather than dumping it off the shelf.
That’s a good start but there in no “only solution”. We will need hundreds of “solutions” to work in tandem to rebuild of shoreline
Posted on 2/25/18 at 12:09 pm to kingbob
Caenarvon is not a sediment diversion. I don't see why people don't understand this.
And while marsh creation (like in sediment pipeline you are talking about) provides immediate benefit, and beneficial use of "waste", it is extremely expensive compared to diversions.
And while marsh creation (like in sediment pipeline you are talking about) provides immediate benefit, and beneficial use of "waste", it is extremely expensive compared to diversions.
Posted on 2/25/18 at 12:10 pm to kingbob
quote:
Whenever the Corps does their dredging, they would simply hook their hoses up to the pipeline and send the sediment where it needs to go rather than dumping it off the shelf.
One of the problems with current dredge and fill efforts are the quality of the sediments. The marsh won’t propogate without the correct type of mud.
There is also ongoing research at LSU showing how wetland plants are highly dependent upon the microbial community of the marsh. These are some of the reasons that previous restoration efforts have failed.
Posted on 2/25/18 at 12:14 pm to Bmath
Yeah most of the dredged material is sand and coarse silt. So while it's great for building land, not always the case for vegetation recruitment.
Posted on 2/25/18 at 12:14 pm to Lakeboy7
quote:
Nothing to see here, move along. Corporations are people.
You have completely whiffed on this concept.
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