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CPRA vs Plaquemines Parish

Posted on 6/20/18 at 5:02 pm
Posted by LSUFanHouston
NOLA
Member since Jul 2009
37106 posts
Posted on 6/20/18 at 5:02 pm
LINK

We are about to find out just how powerful the state of Louisiana is.

Living in St Bernard I have done a lot of research on the diversions, and these projects are sketchy at best. If the diversions were wider and more natural, maybe. Channeling water at high rates through a narrow gap isn't going to work.

Not to mention... river water, today, IS NOT CLEAN. It's full of all sorts of nasty chemicals from upriver. Putting that nastiness into the marshes is going to make it worse, not better.

The good people of Plaquemines are about to have this shoved down their throats.

And before anyone says it... I couldn't give AF about the fisherman's arguments. They can go fish somewhere else nearby.
Posted by geauxtigers87
Louisiana
Member since Mar 2011
25207 posts
Posted on 6/20/18 at 5:03 pm to
Plaquemines is lucky we haven't sacrificed it to save the rest of the state. yet.
Posted by LSUFanHouston
NOLA
Member since Jul 2009
37106 posts
Posted on 6/20/18 at 5:07 pm to
quote:

Plaquemines is lucky we haven't sacrificed it to save the rest of the state. yet.


If this diversion goes through... that's pretty much what will happen. They may get sacrificed, but it may not save the state.
Posted by geauxtigers87
Louisiana
Member since Mar 2011
25207 posts
Posted on 6/20/18 at 5:08 pm to
no, sacrificing Plaquemines mean getting rid of the levees down there. this situation here screams Amos not getting a big enough cut
Posted by kingbob
Sorrento, LA
Member since Nov 2010
67111 posts
Posted on 6/20/18 at 5:45 pm to
The saltwater loving species only moved into the area after the land eroded causing the water to become more salty. This will push that brackish wedge back to where it used to be.

Yes, it will erode land in the short term, but will build far more land in the long term.

This is not the same kind of diversion as Carnarvon. Caenarvon was never designed as a sediment diversion, only a water diversion. In fact, it was designed to keep sediment out. This will build far more land because it is designed to divert water AND sediment.
Posted by jimbeam
University of LSU
Member since Oct 2011
75703 posts
Posted on 6/20/18 at 5:57 pm to
quote:

Not to mention... river water, today, IS NOT CLEAN. It's full of all sorts of nasty chemicals from upriver. Putting that nastiness into the marshes is going to make it worse, not better.
look at the area around Caernaevon and get back to me

quote:

This is not the same kind of diversion as Carnarvon. Caenarvon was never designed as a sediment diversion, only a water diversion. In fact, it was designed to keep sediment out. This will build far more land because it is designed to divert water AND sediment.
I see you remember what I taught you

This post was edited on 6/20/18 at 6:07 pm
Posted by Tiger Prawn
Member since Dec 2016
21909 posts
Posted on 6/20/18 at 6:21 pm to
quote:

no, sacrificing Plaquemines mean getting rid of the levees down there.


Not a popular idea but its probably the only thing that will keep the gulf from reaching all the way to NOLA within a century. Buyout homeowners in lower Plaquemine and tear down the levees south of Myrtle Grove
Posted by jimbeam
University of LSU
Member since Oct 2011
75703 posts
Posted on 6/20/18 at 6:39 pm to
Still have to contend with maintaining a shipping channel. Not that you’re wrong, but it’s definitely going to be an interesting era we’re headed into.
Posted by man in the stadium
Member since Aug 2006
1405 posts
Posted on 6/20/18 at 7:51 pm to
Hopefully you continue your research because your comments about the shape of the channel couldn’t be more wrong. One must understand how and when sediment moves in the river to understand how to efficiently capture most of it while moving the least amount of water possible.

Signed,
A professional hydraulic engineer not involved in the diversions

PS: All of Plaquemines will look like what one sees from the Empire bridge in a few decades...just an expanse of Gulf water lapping straight at the toe of the levees. No amount of dredging or non-diversion remedies will help them.
This post was edited on 6/20/18 at 7:56 pm
Posted by GREENHEAD22
Member since Nov 2009
19607 posts
Posted on 6/20/18 at 7:56 pm to
What needs to happen down there is move everyone out and blow the levees. Only thing that should be down there is O&G, green space ie marsh and commercial and recreational fishing.

No one should be permanently living south of bellchase.
Posted by WildTchoupitoulas
Member since Jan 2010
44071 posts
Posted on 6/20/18 at 8:03 pm to
quote:

No one should be permanently living south of...

...the ICWW.
Posted by man in the stadium
Member since Aug 2006
1405 posts
Posted on 6/20/18 at 8:10 pm to
For anyone not a believer in diversions, I would encourage researching the recent (past 150-year) history of the lower Birdsfoot Delta. One doesn’t have to look as far west as Wax Lake for proxies to what the CPRA is trying to achieve. In the 1893 USGS map of Venice easily found online, Baptiste Collete is a tiny ditch leading to an open bay. In roughly 120 years, an entire sub delta lobe of the river was built. Likewise for Cubit’s Gap and the passes stemming from it...Cubit’s gap was a ditch dug by a guy (named Cubit) that exploded into other vast sub delta lobes.

The Plaquemines Parish mafia can argue all they want, but 99% of the engineering and scientific communities have come to the same conclusion that diversions are needed as a key tool for any semblance of a future coastline. But Joe Dirt-vich has already solved these issues while in a meth-induced haze from the helm of his oyster lugger in Bastian Bay and told his budy Amos all about it at Black Velvet, so why does the CPRA bother? Let that Parish fall off the face of the earth and send dollars to other Parishes.
This post was edited on 6/20/18 at 8:11 pm
Posted by jimbeam
University of LSU
Member since Oct 2011
75703 posts
Posted on 6/20/18 at 9:17 pm to
Another example is West Bay
Posted by LSUgusto
Member since May 2005
19222 posts
Posted on 6/20/18 at 9:46 pm to
quote:

river water, today, IS NOT CLEAN
No, it's filled with fertilizer.

I've often wondered if sending that kind of water into a dying watershed would result in added vegetation growth, which is exactly what would help our marshes, instead of creating algae blooms in the Gulf, which does major damage.

I've never seen any study or data on such a scenario, though.
Posted by biglego
Ask your mom where I been
Member since Nov 2007
76338 posts
Posted on 6/20/18 at 10:45 pm to
River water might not be clean, but the alternative is no Plaq Parish at all. So take the imperfect diversion or forget about it altogether.
Posted by The Baker
This is fine.
Member since Dec 2011
16164 posts
Posted on 6/20/18 at 11:01 pm to
(no message)
This post was edited on 1/10/21 at 5:35 pm
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