If Nola had same levee system today as pre-Katrina, would this have been bad as Katrina?

I don't think so. Katrina was just moving a shite-ton more water than Ida.

Possible. The water breeched the 17th street canal wall. It is my understanding that it had to do with the depth of the steel pillings not the height.

frick no it wouldnt have been as bad. pre katrina they couldnt stop surge from backing up into the canels and now they can. also didnt have the "great wall" to protect st benard.

levee system still needs improvement in other areas, but NOLA will never flood again in our lifetime unless they get a 20-25 foot surge.

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Possible. The water breeched the 17th street canal wall. It is my understanding that it had to do with the depth of the steel pillings not the height.

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It is not the levees themselves. It was the years and years of neglect by various city, state and federal entities that lead to the levee breaks in Katrina. Especially city and levee boards that funneled money to thing but levee upkeep.

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both true and industrial canal was hit by barge.

but in general if they fix the god damn barge issue should be fine going forward

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Not an expert, but didn't this storm land some 100 miles west of Katrina, so this argument is difficult to make. Katrina was the worst possible landing spot for flooding. And it was a beast.

However, everyone I have talked too said the wind was a LOT more for Ida than Katrina.

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not really. worst case would be a storm coming at an angle along the coast at a NW angle hitting right at or below NOLA and the eye going directly over cause that would force all the water into lake borgne and lake p and possible overtop the "great wall" and flood st benard and then overtop the gates at the ends of the diverson canels and possibly breach the canal levees again.

all the levee build up though has the water going other places now. so worse for north shore and west like laplace.

No. I dont think so.

Two things:

1) Katrina was bringing about 2.4 the total energy of Ida using Total Integrated Kinetic Energy which accounts for size and strength of storm. So Katrina was pushing a lot more water with it.

2) Wind direction. Katrina stacked a bunch of water up into the Lake with those east winds and then as it passed the winds turned south and pushed the water at the city.

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If Nola had the same levee system this would have made people forget katrina ?

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hard to say. surge with katrina was greater and different angles of approach.

think about it. laura had a 22' surge but it all went into eastern cameron to the point people didnt think it was as high as ike or rita when in fact it was worse.

same with katrina and ida, different angles of approach made the water different. plus ida might have been stronger wind wise but surge wise it was nothing compared to katrina.

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Isn’t this as bad as Katrina?

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I haven't seen news clips of people with homemade signs on roofs, and helicopters doing rooftop rescues. Flooding doesn't seem like the major issue it was for Katrina. I went to bed with dread last night when I saw the power was out for the entire city, and that several pumps were down.

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2) Wind direction. Katrina stacked a bunch of water up into the Lake with those east winds and then as it passed the winds turned south and pushed the water at the city.

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yep almost worse case. only thing worse would be at the angle i talked about on a very slow moving storm pushing same kind of surge that katrina did.

ftr only isabella and "superstorm snady" had higher Total Integrated Kinetic Energy than katrina. Camille was much lower, lower than ike and rita.

not sure where laura ranks as i couldnt find it. but i know 18' storm surge was verified but as compact as luara was I would not expect it to rank very high.