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Started By
Message
re: AMAZING RAW VIDEO Hurricane Katrina roof top flooding St Bernard La
Posted on 8/17/18 at 9:42 am to Byrdybyrd05
Posted on 8/17/18 at 9:42 am to Byrdybyrd05
quote:
Damn I didn’t know that. That’s crazy if they would have closed the canals at the lake they would have saved a lot of people and properties.
The canals are part of the drainage system for everyday storms. Water gets pumped into the canals and flows out into the lake. Katrina caused the lake levels to be higher than the canal levels, so the water backflowed and stacked up until it eventually overflowed/burst the levees surrounding the canals.
For decades there were plans of building floodgates on the canals to prevent that from happening, but the concern was that it would essentially shut down the interior drainage system, causing massive street flooding.
Now we have the best of both... gates to keep lake water out, and pumps that will still get the canal/drainage water out to the lake, even with the gates closed. However, that is a federal paid for system at insane expense.
2
Posted on 8/17/18 at 9:44 am to Ben Hur
quote:
9:59 - Water is knee/waist deep
10:45 - Above the soffit
That's one of the two things that, still to this day, absolutely blow my mind. It's not like Chalmette is on the beach where the surge is coming in directly off the gulf. The water rose 6-8 feet in 45 minutes, spreading out over a rather large area. Just the volume of water is insane.
The other was the sheer force of the rising water, when we got back after the water was gone, seeing houses in the middle of the street, and cars on rooftops.
Posted on 8/17/18 at 9:51 am to LSUFanHouston
That is good to know! I feel a lot better about New Orleans if a hurricane was coming this direction. I can’t imagine if hurricane Harvey that hit Houston last year just sat on top of our area for all those days.
Posted on 8/17/18 at 9:55 am to Byrdybyrd05
Just beyond horrors. I thank God my daughter was at work at University Hospital when this happened. Her home of 8 months was in Meraux and totally covered by water. She went to work Friday before the storm and a bus dropped her off in Lafayette the Friday after the storm. Very hard to experience.
This post was edited on 8/17/18 at 9:56 am
Posted on 8/17/18 at 9:55 am to Byrdybyrd05
Oh in a system like that it could get bad, but I’m thinking more like a few feet of water in houses and it would drain off in a three or four days. The Katrina water sat in the city for a good two weeks, which just made things even worse
Posted on 8/17/18 at 10:01 am to LSUFanHouston
quote:
The canals are part of the drainage system for everyday storms. Water gets pumped into the canals and flows out into the lake. Katrina caused the lake levels to be higher than the canal levels, so the water backflowed and stacked up until it eventually overflowed/burst the levees surrounding the canals.
The problem was the pumping stations in Orleans Parish were not at the mouth of the canals at the time.. Now they are...
That's why Jefferson didn't have the magnitude of flooding as Orleans parish with the levee breaks. We were just lucky the 17th street canal levee didn't break on the Jefferson side.. If Broussard let the pumping station operators stay, Jefferson, except for Old Metairie, may have not flooded at all..
The reason the Orleans side broke first is because the parish dredged their side the canal..
If you notice in this pic, Jefferson has a swatch of land between the wall and the canal, the Orleans parish side doesn't..
This post was edited on 8/17/18 at 10:05 am
Posted on 8/17/18 at 10:03 am to LSUFanHouston
quote:
the sheer force of the rising water, when we got back after the water was gone, seeing houses in the middle of the street, and cars on rooftops.
1 cubic meter of water weighs 1 ton.
Posted on 8/17/18 at 10:04 am to notiger1997
I've been directly involved in the permanent closures at the end of the outfall canals in New Orleans. The city is very well protected at this point. Those stations can pump faster than the stations upstream.
A good way to think of it is that the old S&WB stations at the head of the canals drain the streets, while the new canal closures and pumps drain the canals.
If you want to get behind a cause that will prevent this from happening ever again, call your congressmen and senators and have them get behind the surge barrier project at the Rigolets. This project would make the levees and pumps that we all know... secondary protection. The east bank of Orleans and Jefferson would be, by far, the most well protected coastal community from surge flooding on the planet. It would also protect every community on the north shore without need for levees. We will have one final chance to get it built, and that is the infrastructure bill.
A good way to think of it is that the old S&WB stations at the head of the canals drain the streets, while the new canal closures and pumps drain the canals.
If you want to get behind a cause that will prevent this from happening ever again, call your congressmen and senators and have them get behind the surge barrier project at the Rigolets. This project would make the levees and pumps that we all know... secondary protection. The east bank of Orleans and Jefferson would be, by far, the most well protected coastal community from surge flooding on the planet. It would also protect every community on the north shore without need for levees. We will have one final chance to get it built, and that is the infrastructure bill.
This post was edited on 8/17/18 at 10:08 am
Posted on 8/17/18 at 10:04 am to Hangover Haven
That picture and others I’ve seen make me count my blessings. I saw one that made it look the the Jefferson side of the wall was bent in a little.
If the Jefferson side would have broke, I’m sure my house would have taken in at least four feet.
If the Jefferson side would have broke, I’m sure my house would have taken in at least four feet.
Posted on 8/17/18 at 10:05 am to Hangover Haven
never understood why it was just that skinny arse wall instead of a levee type structure
Posted on 8/17/18 at 10:07 am to Jones
There is a small levee as well.
They just didn’t design it up to proper standards and then didn’t even build it correctly to those lower standards.
They just didn’t design it up to proper standards and then didn’t even build it correctly to those lower standards.
Posted on 8/17/18 at 10:10 am to Jones
quote:
never understood why it was just that skinny arse wall instead of a levee type structure
There is a levee, with a wall on top..
The levee was just too small, and the fact the canal was dredged cause the problem as well..
Posted on 8/17/18 at 10:13 am to notiger1997
quote:
Jefferson side of the wall was bent in a little.
Was it ever proven that section actually "bent," or that was the design of levee..?
I never had a clear answer to that..
This post was edited on 8/17/18 at 10:14 am
Posted on 8/17/18 at 10:29 am to TSmith
quote:
get behind the surge barrier project at the Rigolets.
For anyone else curious:
quote:
The 2017 update of the Louisiana coastal protection and restoration Master Plan calls for building surge-barrier gates at the Chef Menteur and Rigolets passes between Lake Borgne and Lake Pontchartrain for $2.4 billion. The gates would be built during the first 30 years of the plan, but no money source for the project has been identified yet.
Posted on 8/17/18 at 10:35 am to Ben Hur
Yeah that would be huge. It would def help the La Place area to avoid bad flooding as well.
Posted on 8/17/18 at 10:38 am to notiger1997
quote:
Just wanted to point out, rainfall flooding would have caused minimal issues in Nola during Katrina. The damn outflow drainage canals were open to the lake, so the surge came in and walls/levees collapsing in the city was the problem. They now have pump stations or locks blocking all of these canals at the lake, so I have hopes things will hold up much better for the city.
That’s true, and thankfully for Nola that Harvey rained on Houston and not there. Fifty inches of rain would have flooded Nola beyond recognition and drowned more people than Katrina. We endured both and are grateful for minimal damage in both, relatively speaking. Nola is not prepared for fifty inches of rain in one event, and probably never will be, unfortunately. Stay as high and dry as possible.
Posted on 8/17/18 at 10:38 am to Ben Hur
That’s good info to know thanks for posting that.
Posted on 8/17/18 at 10:44 am to Ben Hur
quote:
The 2017 update of the Louisiana coastal protection and restoration Master Plan calls for building surge-barrier gates at the Chef Menteur and Rigolets passes between Lake Borgne and Lake Pontchartrain for $2.4 billion. The gates would be built during the first 30 years of the plan, but no money source for the project has been identified yet.
They were supposed to do that after Betsy, but some enviromental group got involved and had it stopped..
and now I think Mississippi is trying to stop this project because they claim it will cause more flooding there...
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