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Started By
Message
Someone Educate Me About Diversions
Posted on 2/23/14 at 10:00 pm
Posted on 2/23/14 at 10:00 pm
I keep hearing about diversions, siphons, swoopeda ( 
), etc.
What I'm looking for is some info about where they are (in relation to Golden Meadow area over into Delacroix), when they open them, why they open them, etc. I guess I'm just confused as to what the whole thing is about. It's seems to just muddy up the entire area.
), etc. What I'm looking for is some info about where they are (in relation to Golden Meadow area over into Delacroix), when they open them, why they open them, etc. I guess I'm just confused as to what the whole thing is about. It's seems to just muddy up the entire area.
2
Posted on 2/23/14 at 10:03 pm to LSUMurse
Diversions divert water.
These help control salinity. The Caernarvon is the best example. Although they have recently started using it during high flood years to relieve pressure from the levees.
Siphons transport land building material (mud,silt,etc.)
These help control salinity. The Caernarvon is the best example. Although they have recently started using it during high flood years to relieve pressure from the levees.
Siphons transport land building material (mud,silt,etc.)
This post was edited on 2/23/14 at 10:04 pm
Posted on 2/23/14 at 10:03 pm to LSUMurse
Well to begin, there are fresh water diversions and sediment diversions. I'm sure I don't need to explain the difference between these 2
They are designed to allow certain amounts of river water at certain river heights to introduce either fresh water to revitalize fresh water plant growth, or sediment to actually have land accruement.
and I will leave the details up to some of the experts I know there are on the OB
They are designed to allow certain amounts of river water at certain river heights to introduce either fresh water to revitalize fresh water plant growth, or sediment to actually have land accruement.
and I will leave the details up to some of the experts I know there are on the OB
Posted on 2/23/14 at 10:06 pm to jimbeam
And some people hate them because it moves their cheese
Restore all natural flowages of the delta that are now leveed off and watch their cheese really move
Restore all natural flowages of the delta that are now leveed off and watch their cheese really move
This post was edited on 2/23/14 at 10:07 pm
Posted on 2/23/14 at 10:07 pm to choupiquesushi
Meh.
They'll be catchin oysters in the lower ninth ward if something is done.
They'll be catchin oysters in the lower ninth ward if something is done.
Posted on 2/23/14 at 10:12 pm to jimbeam
Does anyone know of a website that has locations and effected areas? When they're open, etc?
Posted on 2/23/14 at 10:14 pm to LSUMurse
I know the coastal master plan has a list of all projects completed and planned. list every diversion.
and I'm sure a quick google image search would pull up a general map
ETA
Couldn't help myself
and I'm sure a quick google image search would pull up a general map
ETA
Couldn't help myself
This post was edited on 2/23/14 at 10:16 pm
Posted on 2/23/14 at 10:28 pm to jimbeam
THANK YOU!!!!
My eyes were crossed trying to find something like that.
My eyes were crossed trying to find something like that.
Posted on 2/23/14 at 10:35 pm to jimbeam
Do the sediment diversions muddy up the water as much as the fresh water? or is it the other way around?
Posted on 2/23/14 at 10:38 pm to LSUMurse
yes they are designed to introduce maximum sediment into the marsh.
lots of research and calculations go into the placement and timing of these sediment diversions
lots of research and calculations go into the placement and timing of these sediment diversions
Posted on 2/23/14 at 11:36 pm to jimbeam
i think if people would realize, although their water will be "muddied up" and freshwater is going to dominate the area.
In the long run, the coast will thrive as it starts to normalize back into what it once was.
Fishermen complain that they will lose their "livelihood"
well guess what your great grandaddy wasn't catching shrimp in the same spot you are catching them.
He was catching bass and sac au lait
In the long run, the coast will thrive as it starts to normalize back into what it once was.
Fishermen complain that they will lose their "livelihood"
well guess what your great grandaddy wasn't catching shrimp in the same spot you are catching them.
He was catching bass and sac au lait
Posted on 2/24/14 at 12:07 am to LSUMurse
quote:
Do the sediment diversions muddy up the water as much as the fresh water? or is it the other way around?
Both Caernarvon and Davis Pond are both freshwater diversions. Yes both do carry nutrient rich sediment, but they were designed to maintain salinity levels at key areas in the marsh.
The sediment is what causes the water to look muddy.
When the Miss. River is low the water looks green. That is because very little sediment is suspended in the water column.
When the Miss. River starts to rise the water looks brown. This is when the most sediment is suspended in the water column. Sediment continues to stay suspended in the water column as long as water velocities are high.
In both cases the salinity of the river water is the same.
If you read or hear about new diversions make sure you read the fine print beacause some of the new proposals are calling for "sediment" diversions. These will try to get the maximum amount of sediment in the coastal marshes.
From my experience diversions are both hurting and helping the coastal marshes. One thing is sure. They all piss off the fishermen.
Posted on 2/24/14 at 12:19 am to ScottieP
quote:
From my experience diversions are both hurting and helping the coastal marshes
The charters are quick to jump on any single study showing negative effects. For instance.
Salt water plants getting damaged by fresh water. Thus leading to land loss. On the short term, yes, it hurts the marsh. On the long term, if you also incorporate proper sediment introduction, you'll have a healthy fresh water vegetation marsh the way it used to be.
Not everyone will be happy, but for the future of this state I believe we will have to put some things aside and do what's best.
Posted on 2/24/14 at 5:00 am to jimbeam
So, if the Caernarvon diversion is open, is it useless to try for specks in Delacroix? Will it drop the salinity level enough to chase them out? How widespread is it's effect? How far from the diversion do you have to get?
Is there a site or a way to know if it's open before going out there?
Is there a site or a way to know if it's open before going out there?
Posted on 2/24/14 at 6:26 am to LSUMurse
There are a lot of individual studies on the salt line being pushed. Varied results.
Posted on 2/24/14 at 6:58 am to jimbeam
quote:
jimbeam
Someone Educate Me About Diversions
Meh.
They'll be catchin oysters in the lower ninth ward if something is done.
You mean if something isn't done?
Posted on 2/24/14 at 7:21 am to choupiquesushi
Yea
Posted on 2/24/14 at 7:59 am to jimbeam
The thing that is comical is if they just restored the original flowages from the miss river below new orleans.... before levees...
freshwater and brackish would be where people are catching shrimp now......
freshwater and brackish would be where people are catching shrimp now......
Posted on 2/24/14 at 10:09 pm to LSUMurse
quote:
So, if the Caernarvon diversion is open, is it useless to try for specks in Delacroix? Will it drop the salinity level enough to chase them out? How widespread is it's effect? How far from the diversion do you have to get? Is there a site or a way to know if it's open before going out there?
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