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Posted on 2/4/18 at 11:44 am to Duckhammer_77
quote:
MS been trying to go down Atchafalaya for 40 yrs
Longer than that. ORCS was built to stop it in 1963
Posted on 2/4/18 at 11:46 am to GRTiger
silly. a third of the world's crops go through it.
Posted on 2/4/18 at 11:47 am to TDsngumbo
quote:
I didn't realize how close the control structure is to failing.
It’s not close to failing; the advocate just runs this story every time they need a catchy front page article. “New research” supported the idea that a mega flood could cause it to fail. The ORCS withstood the ‘11 flood and it can withstand the next big flood if the Corps doesn’t have their head up their arse and opens the Bonnet Carrie and Morganzia spillways in time.
Posted on 2/4/18 at 11:50 am to Thib-a-doe Tiger
quote:
Maybe temporarily. I doubt having to drive a boat 70 miles west is going to be too big of a deal
What's 70 miles west?
Posted on 2/4/18 at 11:53 am to Duckhammer_77
quote:
trying to go down Atchafalaya for 40 yrs
The Red, Atchafalaya and Mississippi have been intermittently connected for thousands of years. Will continue in spite of our best efforts. Read The Control of Nature.
Posted on 2/4/18 at 11:56 am to islandtiger
It's very hard to control an alluvial river/stream long term. The Mississippi will no doubt win at some point. The real point that the article makes is that sedimentation has lowered the necessary size of the next major flood that could threaten the structure. The red river floods of the last few years saw different responses due to sedimentation the corps really hadn't factored into their numbers.
Posted on 2/4/18 at 12:32 pm to TDsngumbo
Prof was talking about this in Geol 1001 in 1979.
Posted on 2/4/18 at 12:34 pm to TDsngumbo
Probably why ExxonMobil is leaving Louisiana and selling the Baton Rouge facility. They know what's coming.
Posted on 2/4/18 at 12:36 pm to TDsngumbo
If totally left to nature, when would the river change its course?
Posted on 2/4/18 at 12:38 pm to East Coast Band
quote:
If totally left to nature, when would the river change its course?
it already would have years ago.
Posted on 2/4/18 at 1:10 pm to kingbob
quote:
The problem for New Orleans is that the saltwater wedge would go past Kenner, meaning the entire New Orleans area would lose its source of fresh water
There are over 50 water systems that pull their raw water from the river. The state and federal government will do everything in their power to keep the river on the course it takes now, because they would end up putting up billions to quickly build desalination plants. Then, the plants would probably have tons of operational problems, because they would be built so quickly there will be a lot of shoddy work.
Posted on 2/4/18 at 1:21 pm to Napoleon
Do you remember when that little oilfield supply boat got rammed in Southwest Pass about Twenty years ago ? It plugged the mouth of the river for about ten days. There were probaly about 100 ships on anchor in the Gulf trying to get in. Ships from around the world.
Posted on 2/4/18 at 1:26 pm to kingbob
quote:
The problem for New Orleans is that the saltwater wedge would go past Kenner, meaning the entire New Orleans area would lose its source of fresh water. The entire water system would be destroyed and expensive desalinization plants would have to be installed IMMEDIATELY
Might be cheaper to start drawing water from Lake Pontchartrain.
Posted on 2/4/18 at 1:29 pm to Thib-a-doe Tiger
quote:
Maybe temporarily. I doubt having to drive a boat 70 miles west is going to be too big of a deal
What about loading and unloading? NOLA is no longer suitable and Morgan City is gone. You have to completely rebuild port infrastructure.
Posted on 2/4/18 at 1:40 pm to East Coast Band
quote:
If totally left to nature, when would the river change its course?
It almost happened in 1973 WITH the Old River Contral Structure in place. If it hadn't been built, it probably would have happened in the '60s and definitely in 1973.
There was a big thread about this around two months ago. I believe geologists were quoted as saying the river shifted 7 times in the past thousand years or about every 150 years. We're way past due.
Posted on 2/4/18 at 1:43 pm to Bestbank Tiger
quote:
Might be cheaper to start drawing water from Lake Pontchartrain.
The lake is brackish. It would cause the same corrosion problems, just at a slower rate because of the lower salinity.
Lake Ponchartrain isn't really a lake. It's a tidal estuary.
Posted on 2/4/18 at 1:53 pm to White Roach
quote:
I believe geologists were quoted as saying the river shifted 7 times in the past thousand years or about every 150 years. We're way past due.
There's only 6 deltas of note, the oldest being about 4600 years old. The current delta is about 550 years old. Maybe within the Plaquemine and Balize deltas they shifted that much, but thats not a very radical shift. Not like moving from the majority of flow coursing down the current river to the majoritu flowing down the Atchafalaya would be.
Posted on 2/4/18 at 1:55 pm to Cowboyfan89
One good thing if that happens. Traffic is more easily fixed. ??
Posted on 2/4/18 at 2:15 pm to White Roach
quote:
The lake is brackish. It would cause the same corrosion problems, just at a slower rate because of the lower salinity.
Lake Ponchartrain isn't really a lake. It's a tidal estuary.
Yep. But I was thinking the lower salinity would make the conversion to potable water easier.
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