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re: LSU Study: Mississippi River diversions led to wetland loss, not growth
Posted on 8/21/19 at 9:13 am to goofball
Posted on 8/21/19 at 9:13 am to goofball
The Advocate botched the title. You can have differences of opinion, but read the article.
These diversions were for balancing salinity levels, not sediment. Shame on the paper for making such an asinine lead on such an important topic.
These diversions were for balancing salinity levels, not sediment. Shame on the paper for making such an asinine lead on such an important topic.
1
Posted on 8/21/19 at 9:16 am to Motorboat
quote:The ONLY solution to prevent loss is to allow the river to move as it is supposed to.
What's your practical solution, bruh?
Due to the fact that we won’t do that, we need to just accept that wetland loss will happen.
This post was edited on 8/21/19 at 9:17 am
Posted on 8/21/19 at 9:21 am to Bread Orgeron
quote:
t's a continuous outward flow. It doesn't go back into the river. The only time I think you might could see that happen would be during a strong storm surge event, but it'd be rare.
So then, while the sediment diversions have special system to capture the sediment, you still have the issue of the water itself blasting into the swamp.
If the freshwater diversions going into the swamp are accelerating land loss, and the water flow from the sediment diversions is going to be that much larger... are we going to capture enough sediment to even counteract the land loss from the water intrusion? Much less actually start rebuilding land?
Posted on 8/21/19 at 9:22 am to Hot Carl
quote:
and cultural) interest
Public Financial decisions shouldn’t be made for emotional reasons.
Posted on 8/21/19 at 9:24 am to LSUFanHouston
quote:
Why can't we treat the water before bringing it into the swamps, or just return the water to the river?
You want to treat the entire flow of the Mississippi River? That’s 4.48 billion gallons per second.
Posted on 8/21/19 at 9:28 am to Oilfieldbiology
quote:
You want to treat the entire flow of the Mississippi River? That’s 4.48 billion gallons per second.
Nooooooo.
We treat the flow when it enters the drinking water systems in Jefferson, Orleans, and St. Bernard for example.
So, treat the flow as it enters the diversion. Not the whole river, just what is entering the diversion.
Treating the entire river where it flows out into the gulf might stop the dead zones, but that's not realistic.
Posted on 8/21/19 at 9:39 am to LSUFanHouston
I’m not sure you understand the scale of these diversions and the capacity of treatment systems.
Some of the largest treatment systems (thinking drinking water for NYC and L.A.) are huge, and they treat hundreds of millions of gallons a day.
The report said 75,000 ft^3/sec diversion at max flow. That’s 48 billion gallons a day. I just don’t know if we could afford to build a treatment complex that large nor if we even have the real estate to do so.
Honest to God solution to treating the MS River is to stop excessive fertilization and farm run-off along the entire Midwest.
Some of the largest treatment systems (thinking drinking water for NYC and L.A.) are huge, and they treat hundreds of millions of gallons a day.
The report said 75,000 ft^3/sec diversion at max flow. That’s 48 billion gallons a day. I just don’t know if we could afford to build a treatment complex that large nor if we even have the real estate to do so.
Honest to God solution to treating the MS River is to stop excessive fertilization and farm run-off along the entire Midwest.
Posted on 8/21/19 at 9:40 am to goofball
quote:
according to a new study led by LSU researchers.
LSU Researchers are the ones who told CPRA where to put the Mid Breton and Mid Barateria. 
Posted on 8/21/19 at 9:41 am to LSUFanHouston
That is not feasible by any stretch of the imagination.
Posted on 8/21/19 at 9:41 am to Oilfieldbiology
quote:
The report said 75,000 ft^3/sec diversion at max flow. That’s 48 billion gallons a day. I just don’t know if we could afford to build a treatment complex that large nor if we even have the real estate to do so.
I asked if we could do it. Sounds like it's not realistic or even possible.
quote:
Honest to God solution to treating the MS River is to stop excessive fertilization and farm run-off along the entire Midwest.
Agreed... but how do we get people in the Midwest to care about us here in LA? Including the politicians who would need to pass laws to make this happen.
Posted on 8/21/19 at 9:43 am to Motorboat
quote:
What's your practical solution, bruh?
Blow the levies south of BRLA. It's the only way.
Posted on 8/21/19 at 9:44 am to LSUFanHouston
quote:
Why can't we treat the water before bringing it into the swamps, or just return the water to the river?
quote:MS River water is cleaner than most water in LA.
Wax Lake works because you don't have all the crap water coming in.
Posted on 8/21/19 at 9:46 am to LSUFanHouston
quote:
asked if we could do it.
Hopefully I didn’t come across as condescending. I was trying to answer your question by showing you the scale with which we were talking.
As to how, it would take a complete revamping of the entire farming industry. I don’t know how to do that right now, but it’s something I do think about. When you look at the corn, wheat, and soy bean fields all throughout the mid west and all the livestock production, it would have to be through source control, but like I previously said, no clue how to get that done.
Posted on 8/21/19 at 9:47 am to LSUFanHouston
quote:Pleas read on what freshwater and sediment diversions do before you ask these questions.
So then, while the sediment diversions have special system to capture the sediment, you still have the issue of the water itself blasting into the swamp.
If the freshwater diversions going into the swamp are accelerating land loss, and the water flow from the sediment diversions is going to be that much larger... are we going to capture enough sediment to even counteract the land loss from the water intrusion? Much less actually start rebuilding land?
Posted on 8/21/19 at 9:48 am to Oilfieldbiology
Riparian zone reclamation/restoration is one of the first steps IMO.
Posted on 8/21/19 at 9:49 am to GetBackToWork
Posted on 8/21/19 at 10:07 am to Elusiveporpi
quote:
Look at what this gif is doing. Present day, all brackish marsh. then 10 years with the diversion a it changed to a more fresh water marsh. 30 years the fresh water marsh grows and creates more land. then 50 years you have land loss and it reverts back to brackish marsh? SO the trend after 30 years just magically makes a 180 at 50 years?
That gif is funky if you analyze it.
This post was edited on 8/21/19 at 10:19 am
Posted on 8/21/19 at 10:12 am to goofball
quote:
the nutrient-rich freshwater they transported weakened the ability of wetland grasses to hold together organic soils during hurricanes and other storms, drowned wetlands by high water levels, and caused physical scouring of some wetlands.
Sooooo... they moved too much water too fast into these areas?
Posted on 8/21/19 at 10:23 am to Bard
quote:probably not. these reporters are just taking the loss of saltwater marshes as a bad thing when it is transforming back into freshwater marsh.
quote:
the nutrient-rich freshwater they transported weakened the ability of wetland grasses to hold together organic soils during hurricanes and other storms, drowned wetlands by high water levels, and caused physical scouring of some wetlands.
Sooooo... they moved too much water too fast into these areas?
Posted on 8/21/19 at 10:27 am to CarRamrod
I saw a report the other day that Mardi Gras Pass was building new land.
This post was edited on 8/21/19 at 11:43 am
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