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re: CNN says LA. is losing coastline due to global warming
Posted on 2/11/19 at 4:39 pm to Rohan Gravy
Posted on 2/11/19 at 4:39 pm to Rohan Gravy
marsh land constantly sinks as the marsh grass decays below the surface.
water levels are not rising, the land is slowly sinking and has been since forever. river sand and silk keeps rebuilding the land as fast or faster then it sinks.
when we interrupted all of that with levees and water diversions, we stopped the rebuilding of the land.
land loss in louisiana is 100% all man made, but it has nothing to do with the climate and everything to do with fricking with the rivers natural ability to rebuild land that is constantly sinking.
the solution is to return the river to its natural ability to overflow its banks seasonally and replenish the marshes
water levels are not rising, the land is slowly sinking and has been since forever. river sand and silk keeps rebuilding the land as fast or faster then it sinks.
when we interrupted all of that with levees and water diversions, we stopped the rebuilding of the land.
land loss in louisiana is 100% all man made, but it has nothing to do with the climate and everything to do with fricking with the rivers natural ability to rebuild land that is constantly sinking.
the solution is to return the river to its natural ability to overflow its banks seasonally and replenish the marshes
2
Posted on 2/11/19 at 4:39 pm to ProjectP2294
Army Corp of engineers forcing the Mississippi to stay on one course.
Posted on 2/11/19 at 4:41 pm to DelU249
quote:
probably has nothing to do with the physical redirection of the Mississippi river at the mouth...nope, nothing at all. it's definitely not that.
Bingo.
Posted on 2/11/19 at 4:56 pm to Rohan Gravy
Erosion, salt water intrusion and sea level rise are all working together. According to NOAA data, the sea level at Grand Isle is rising at a rate of 9.08 mm per year, a little less than a half inch per year. Over ten years, that's about 3.5 inches. At that rate, the rise from 1990 to today is about 10 inches. In Louisiana's flat coast, that's substantial. Without other forces, that can take an area right at the end of land in 1990 to an area where you can easily run a boat over it.
While it is incorrect to suggest that Louisiana's coastal loss is solely due to sea level changes, it is equally incorrect to say that sea level rise plays no part.
While it is incorrect to suggest that Louisiana's coastal loss is solely due to sea level changes, it is equally incorrect to say that sea level rise plays no part.
Posted on 2/11/19 at 4:57 pm to keakar
quote:
water levels are not rising,
Wrong!
NOAA Data Map
Note that the data map is a combination of sea level rise and land subsidence. However, what you can clearly see from the map is that levels are rising everywhere, regardless of land drop.
This post was edited on 2/11/19 at 5:03 pm
Posted on 2/11/19 at 5:01 pm to Rohan Gravy
quote:Because marsh gets eroded over time. Sediment carried by the Mississippi River used to get deposited in the marshes when it spilled over its banks and would rebuild what was lost to erosion. Then people built huge levees all along the lower Miss. River and now that sediment is blocked from going into marshes and instead gets carried straight into the Gulf. Erosion still happens, but the rebuilding of land from sediment carried by the river does not.
Can somebody educate me on why we are losing coastline.
Posted on 2/11/19 at 5:01 pm to TBoy
quote:
the sea level at Grand Isle is rising at a rate of 9.08 mm per year
Is the sea going up or the land going down?
While this may seem like a distinction without a difference, it actually is extremely important. In most of South Louisiana, subsidence is occuring where gravity is compacting and squeezing the moisture out of the soil, causing it to compress and sink. Prior to the construction of the levees, annual floods would add new layers of sediment on top of that soil in quantities that more than counteract the sinking due to subsidence. Without that sediment deposition, there's nothing to counteract the sinking.
If we assume that the problem is sea levels rising when the issue is really due to subsiding land due to a lack of natural replenishment, while both could arguably be man-made causes of land loss, the actions needed by man to reverse these changes are completely different.
It's like not being sure if your cough is due to the flu or lung cancer. They both can make you cough, and they're both caused by disease, but the means of curing them is completely different.
Posted on 2/11/19 at 5:01 pm to IllegalPete
quote:
Apparently scientists and scholars were unaware of the effects that global warming had on coastline until the federal government started dishing out millions of dollars in grants for people to study it.
They wanted to tax it before pretending to study it, but those dastardly Republicans got in the way.
Posted on 2/11/19 at 5:04 pm to kingbob
quote:
Is the sea going up or the land going down?
Both. The data map says clearly both. But if you look around at all the contiguous coastline, the levels are rising. Land loss is not occurring everywhere. The combined action is greater in Louisiana because of the land loss, but the rising is pretty much everywhere.
Posted on 2/11/19 at 5:12 pm to TBoy
quote:
levels are rising.
Posted on 2/11/19 at 5:19 pm to TBoy
quote:
But if you look around at all the contiguous coastline, the levels are rising
Yes, but they are not rising by equal amounts. The levels are abnormally high in Louisiana while relatively uniform elsewhere. That indicates to me that their method of measuring may be slightly flawed. It is incredibly difficult to measure sea level relative to land when both are in flux.
If it were only sea level rise, the sea would be rising at approximately the same rate at all points.
This post was edited on 2/11/19 at 5:20 pm
Posted on 2/11/19 at 5:45 pm to TBoy
quote:
the rising is pretty much everywhere.
Except in your pants, due to testosterone lowering.
Posted on 2/11/19 at 6:07 pm to Rohan Gravy
It’s those big buildings they’ve built near the coast. Luckily they’ve got big buildings on both coast or we would tip over like Guam.
This must be true. I saw a congress person state this in a hearing.
Quit building those big buildings so close to the water. Build them in Kansas, Nebraska, etc. I don’t won’t us to flip over.
This must be true. I saw a congress person state this in a hearing.
Quit building those big buildings so close to the water. Build them in Kansas, Nebraska, etc. I don’t won’t us to flip over.
Posted on 2/11/19 at 6:08 pm to Rohan Gravy
quote:
Can somebody educate me on why we are losing coastline
It's all the figs in San Fran jumping off the Golden Gate Bridge making the water level rise.
This post was edited on 2/11/19 at 6:12 pm
Posted on 2/11/19 at 6:15 pm to keakar
I appreciate all of the info.
Here’s the scarry part.
They interviewed a Tulane professor.
He agreed with the global warming BS.
He said he had an eight year old daughter and didn’t think she would be able to get a 30 year loan to buy a home in New Orleans.
This is fear mongering on steroids.
Here’s the scarry part.
They interviewed a Tulane professor.
He agreed with the global warming BS.
He said he had an eight year old daughter and didn’t think she would be able to get a 30 year loan to buy a home in New Orleans.
This is fear mongering on steroids.
Posted on 2/11/19 at 6:25 pm to TBoy
You always talk crap about stuff you know nothing about!
Posted on 2/11/19 at 6:28 pm to TBoy
quote:
NOAA Data Map
Absolute crap! The sea level is rising at different rates at different islands of Hawaii? You must be an idiot to believe that.
Hey - Guam is going to flip over!
Posted on 2/11/19 at 6:32 pm to Rohan Gravy
quote:
They interviewed a Tulane professor.
He agreed with the global warming BS.
Publish or perish!
Agree or get defunded!
You can't study and publish without funding.
Posted on 2/11/19 at 6:36 pm to LSUbest
quote:
Absolute crap! The sea level is rising at different rates at different islands of Hawaii? You must be an idiot to believe that.
Sorry to tell you this, but you are an imbecile.
Posted on 2/11/19 at 6:52 pm to TBoy
Don't be sorry tiddy girl, I value your opinion so much more than academia!
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