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Louisiana's Disappearing Coast
Posted on 3/26/19 at 8:08 pm
Posted on 3/26/19 at 8:08 pm
Fascinating read about the history and present state of the Mississippi River and south Louisiana: LINK
Probably TL;DR for most, but a very good read for those interested.
Probably TL;DR for most, but a very good read for those interested.
quote:
Since the days of Huey Long, Louisiana has shrunk by more than two thousand square miles. Every hour and a half, Louisiana sheds another football field’s worth of land.
A variety of factors are driving the “land-loss crisis,” as it’s come to be called. But the essential one is a marvel of engineering. Thousands of miles of levees, flood walls, and revetments have been erected to manage the Mississippi. This vast system, built to keep southern Louisiana dry, is the very reason the region is disintegrating.
But if control is the problem it must also be the solution. And so a huge new public-works project is getting under way—this one aimed not at flood control so much as at controlled flooding. Ten pharaonic structures are planned. The furthest along of these is slated for Plaquemines Parish. It will feature enough concrete and riprap to pave Greenwich Village and, when operating at full capacity, will, by flow, be the twelfth-largest river in the country.
16
Posted on 3/26/19 at 8:09 pm to Patrick_Bateman
quote:
Every hour and a half, Louisiana sheds another football field’s worth of land.
Someone actually did the math on this lie and proved that - by these numbers - LA would disappear totally in just a few years.
Posted on 3/26/19 at 8:16 pm to Patrick_Bateman
Levee system fricked it all up for good.
Posted on 3/26/19 at 8:16 pm to Patrick_Bateman
Fake news
Posted on 3/26/19 at 8:17 pm to Patrick_Bateman
You can not replicate the Mississippi River over the geologic time scale necessary to rebuild the coast with a “ diversion “ project. Translation. They ain’t got enough time. It’s over,it’s gone.
Posted on 3/26/19 at 8:18 pm to Patrick_Bateman
For each bit of coast that disappears isn’t new coast created?
This post was edited on 3/26/19 at 8:22 pm
Posted on 3/26/19 at 8:20 pm to Patrick_Bateman
Isn't louisiana gaining coast over the last decade?
Posted on 3/26/19 at 8:21 pm to OysterPoBoy
Definitely not. It’s all washing out into the deep gulf instead of replenishing the marshlands
Posted on 3/26/19 at 8:24 pm to Patrick_Bateman
And with every disappearing football field of coast my property value goes up. Once the NorthShore turns into the coast, I’m selling and getting the frick out of this shithole.
Posted on 3/26/19 at 8:25 pm to fightin tigers
No The only new land ( river delta ) is at Wax Lake Outlet and the Mouth of the Athchafalaya. Glad it is happening but the loss of land is staggering. From the Atchafalaya to the Mississippi massive amounts of marsh has been lost. It will never come back.
Posted on 3/26/19 at 8:26 pm to fightin tigers
I’m not going to pretend to know the rate of loss but as someone who has hunted and fished coastal Louisiana for 50 plus years I can say for certain it is disappearing at a rapid rate. I can go into areas after just several months and islands I fished are now open water.
We will never get it back and it is getting to a point where even slowing it down is going to be hard without major help from the federal government which might never happen.
We will never get it back and it is getting to a point where even slowing it down is going to be hard without major help from the federal government which might never happen.
Posted on 3/26/19 at 8:27 pm to Bigfishchoupique
West Bay
Mardi Gras Pass
Grand Pass
All with new subaerial in the last decade or so. Still a net loss but land nonetheless
Mardi Gras Pass
Grand Pass
All with new subaerial in the last decade or so. Still a net loss but land nonetheless
Posted on 3/26/19 at 8:29 pm to Bigfishchoupique
quote:
No The only new land ( river delta ) is at Wax Lake Outlet and the Mouth of the Athchafalaya. Glad it is happening but the loss of land is staggering. From the Atchafalaya to the Mississippi massive amounts of marsh has been lost. It will never come back
Science says you are wrong
wwl link thing
Gaining two football fields an hour
This post was edited on 3/26/19 at 8:30 pm
Posted on 3/26/19 at 8:30 pm to Eli Goldfinger
Yeah they've been peddling that football field line for as long as I can remember.
Posted on 3/26/19 at 8:30 pm to TH03
That was applicable in the 70s time frame. Not so much anymore
Posted on 3/26/19 at 8:32 pm to Eli Goldfinger
quote:
Someone actually did the math on this lie and proved that - by these numbers - LA would disappear totally in just a few years.
Yeah... no.
1 football field = 1.32 acres
1 football field per 1.5 hours = 21.12 acres per day
Louisiana = 52,378 sq miles
52,378 sq miles = 33,531,920 acres
33,521,920 acres / 21.12 acres per day = 1,587,212 days
1,587,212 days = 4,351 years
Posted on 3/26/19 at 8:34 pm to Eli Goldfinger
quote:
Every hour and a half, Louisiana sheds another football field’s worth of land.
Someone actually did the math on this lie and proved that - by these numbers - LA would disappear totally in just a few years.
I'll run the numbers:
Football field = 160 ft x 360 ft = 57,600 ft2.
An acre is 43,560 ft2 so this is 1.32 acres every 1.5 hours.
Multiply by (1/1.5 hours)*(24 hours/day)*(365 days/year) = 5,840 acres/year.
Louisiana is 33,500,000 acres per the internet.
So Louisiana will disappear in 33,500,000/5,840 = 5,736 years at this rate. That rate seems possible, but the rate will slow and end eventually.
Posted on 3/26/19 at 8:36 pm to Martini
quote:
We will never get it back and it is getting to a point where even slowing it down is going to be hard without major help from the federal government which might never happen.
Bring on the downvotes but, really, all you can do is vote for politicians who believe that man can affect climate, both negatively and positively. As long as we refuse to even accept basic facts and commit to making fundamental changes to the way we treat our environment, the sea levels will continue to rise.
Posted on 3/26/19 at 8:37 pm to Patrick_Bateman
Can someone explain to me in layman's terms why marshland turning into the gulf is bad? Isn't this all uninhabitable land anyway?
Posted on 3/26/19 at 8:40 pm to mmmmmbeeer
quote:
Bring on the downvotes but, really, all you can do is vote for politicians who believe that man can affect climate, both negatively and positively. As long as we refuse to even accept basic facts and commit to making fundamental changes to the way we treat our environment, the sea levels will continue to rise.
Except Louisiana coastline isn't disappearing because sea level is rising, dickhead. It's because sediment isn't being redeposited properly, thanks to man-made changes to control the river. The Mississippi wants to redirect itself over long periods of time, we don't let it.
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