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Started By
Message
re: LSU professor highlights problems with Louisiana’s flood preparedness
Posted on 9/4/18 at 9:26 am to DownshiftAndFloorIt
Posted on 9/4/18 at 9:26 am to DownshiftAndFloorIt
Some of it is engineering, but the vast majority of the problem is actually getting stuff implemented. Politicians need their pet projects completed, and their pockets full before anything gets done
0
Posted on 9/4/18 at 9:30 am to NYNolaguy1
quote:
Impervious materials increases stormwater runoff flow and reduces infiltration into the ground. Q=CiA...
You just blew the poliboard’s mind
Posted on 9/4/18 at 9:35 am to goofball
quote:Truth.
Scruffy should know that Louisiana residents demonstrate their tolerance for stupidity almost every time they elect someone to office.
In most states, the population throws a bone to and elects one or maybe two dumbasses out of tolerance.
LA is so tolerant they elect only dumbasses.
Posted on 9/4/18 at 9:38 am to NYNolaguy1
quote:
Q=CiA...
Oh, the poliboard won't like that.
ETA: GODDAMMIT, KINGBOB!
This post was edited on 9/4/18 at 9:39 am
Posted on 9/4/18 at 9:43 am to goofball
Its ok. Baton Rouge, Central, Prarrieville & Denham Springs continue to build zero lot line subdivisions on ever peice of land that floods after every big storm. That fixes everything.
Posted on 9/4/18 at 9:50 am to goofball
EBR Parish Council made zero changes to New Development requirements in regards to flooding. I think LP and Ascension didn't either. I know Ascension is building the most in flood areas in the country at the moment.
I believe Zachary is the only BR area to make changes to codes (greenspace, lot sizes and retention ponds).
I think people are woefully dumb on runoff. Houston has figured out the hard way that it isn't all about runoff. Many fields and open areas absorb water. Yet you never hear any of that in approval plans. It is all about runoff. Many of these properties never had runoff and now they do. They used to hold water and absorb it through plants or groundwater or sitting in swamp area.
My last point is that as long as taxpayers subsidize bad developments through FEMA and Flood Insurance the problem will get worse and worse. Developers only care about money. They don't care what happens after a property is sold and property owners are fine getting these great insurance rates.
I believe Zachary is the only BR area to make changes to codes (greenspace, lot sizes and retention ponds).
I think people are woefully dumb on runoff. Houston has figured out the hard way that it isn't all about runoff. Many fields and open areas absorb water. Yet you never hear any of that in approval plans. It is all about runoff. Many of these properties never had runoff and now they do. They used to hold water and absorb it through plants or groundwater or sitting in swamp area.
My last point is that as long as taxpayers subsidize bad developments through FEMA and Flood Insurance the problem will get worse and worse. Developers only care about money. They don't care what happens after a property is sold and property owners are fine getting these great insurance rates.
Posted on 9/4/18 at 10:01 am to T
quote:
Its ok. Baton Rouge, Central, Prarrieville & Denham Springs continue to build zero lot line subdivisions on ever peice of land that floods after every big storm. That fixes everything.
What confuses me is how did the Developers trick everyone to buying these tiny lots on top of each other? I thought people moved to the suburbs to get a better space for the dollar (plus schools obviously).
Posted on 9/4/18 at 10:08 am to lsu13lsu
quote:
What confuses me is how did the Developers trick everyone to buying these tiny lots on top of each other? I thought people moved to the suburbs to get a better space for the dollar (plus schools obviously).
When you live in a trashy crackerbox, a slightly less trashy crackerbox seems like a big improvement.
Posted on 9/4/18 at 10:11 am to Eli Goldfinger
quote:
Building a city below sea level is probably problem #1.
lol dumb arse
Posted on 9/4/18 at 10:20 am to Hammertime
quote:
Part of it is putting blacktop and concrete over everything, which speeds up drainage. Idk if they've changed building codes, but there are definitely ways to slow water drainage while still preventing flooding. They just weren't in place
This is false. Permeable surfaces absorb water alleviating some of the burden from the drainage systems. Impermeable surfaces like concrete and blacktop force all that water into a city's already burdened drainage system.
Part of Houston's problem (a Professor at A&M wrote an op-ed after Harvey on this topic) is that the prairie areas West of the city have largely been paved over with new housing communities with a lot of concrete. The Katy Prairie historically functioned as a giant sponge, but has been over-developed in the last 30 years.
This is partly why you see cities put in place requirements that a percentage of your home's lot be permeable surfacing.
Posted on 9/4/18 at 10:28 am to kingbob
quote:
You just blew the poliboard’s mind
I like to think having an education doesnt blow up too many minds these days
. Then again maybe George Carlin was right.Posted on 9/4/18 at 10:36 am to goofball
quote:
EBR, Livingston, and Ascension have been contributing tax dollars to this for 18 years now, and have nothing to show for it but flooded homes and businesses. Maybe we should get a refund on those taxes?
That money has already been stolen, no refund baw.
Posted on 9/4/18 at 10:49 am to ibldprplgld
quote:
Part of Houston's problem (a Professor at A&M wrote an op-ed after Harvey on this topic) is that the prairie areas West of the city have largely been paved over with new housing communities with a lot of concrete. The Katy Prairie historically functioned as a giant sponge, but has been over-developed in the last 30 years.
This is partly why you see cities put in place requirements that a percentage of your home's lot be permeable surfacing.
Great point and one I wish everyone knew. Exactly like the swamps, marshes and cow pastures in Louisiana which are now becoming developments.
Posted on 9/4/18 at 10:54 am to goofball
quote:
Places like Shenandoah
*Most of Shenandoah. Houses along Chadsford and Kennesaw flooded from the drainage ditch that flows into Jones Creek backing up.
Posted on 9/4/18 at 10:58 am to goofball
quote:I wonder why that is. It is almost like the oldest areas knew to not build a house in a swamp below sea level.
Much of those areas are historic districts where new, vertical development isn't really allowed.
Posted on 9/4/18 at 11:06 am to lsu13lsu
quote:
Great point and one I wish everyone knew. Exactly like the swamps, marshes and cow pastures in Louisiana which are now becoming developments.
Billy Bob on the parish council and his developer cousin ain't got time for that shite.
Posted on 9/4/18 at 11:11 am to ibldprplgld
quote:
Part of Houston's problem (a Professor at A&M wrote an op-ed after Harvey on this topic) is that the prairie areas West of the city have largely been paved over with new housing communities with a lot of concrete. The Katy Prairie historically functioned as a giant sponge, but has been over-developed in the last 30 years.
Yes and no. The older Katy neighborhoods flooded . The newer neighborhoods were fine (green space , boat load of retention ponds , Good drainage , etc) . I do agree with some of older Katy being overdevelopment . They were building houses inside the Barker Reservoir 20 years ago. Not the smartest move.
When I first was moving there, I drove over what was clearly a levee. There were houses and development on both sides . I knew something was screwed up at the point.
Posted on 9/4/18 at 11:18 am to crazycubes
quote:
The newer neighborhoods were fine
They build these up higher many times than the older ones. If they use dirt from outside the development that is a big problem for the older neighborhoods nearby who are lower. The new developments are now built up and they runoff to the older lower neighborhoods when the drainage backs up.
If they use dirt from nearby retention ponds that is a good thing. Who knows where these developers get their dirt? I doubt anyone is watching their every move.
Posted on 9/4/18 at 11:22 am to ibldprplgld
How are you gonna go and say what I wrote was false, and then post the exact thing I said as true? Do a little thinking next time
Posted on 9/4/18 at 11:44 am to crazycubes
quote:
The older Katy neighborhoods flooded . The newer neighborhoods were fine
TLDR; New development is not the problem. Older developments are and the flood of 2016 had nothing to do with development. 30" of rain was the problem.
Same thing happened in BR in 2016. Majority of flooding occurred in neighborhoods built post war, but before the flood ordinance. Those developments were built in or near flood zones without detention and without elevation requirements. Around half a dozen developments that were built after the flood ordinance flooded. Those were along the Amite, Comite and Hurricane Creek.
Also, an analysis of the highest peak floods on the Amite River at Denham gauge show that the frequency of high water events has stayed the same in the last 25 years as it did the previous 25 years. US Army Corps projects on the Amite headwaters in the 50's thru 70's deepened the channel upstream allowing water to get downstream faster and deposited sediment in the lower basin, making flooding worse. Development in the last 25 years by and large has mitigated its impact due to the flood ordinance requiring flood zone fill mitigation and detention. The ordinance was improved earlier this year to require new developments to detain 4% chance storms (25 year) instead of 10% chance storms (10 yr).
However, all that helps is new developments. Older developments that were built before the flood ordinance will still flood in another event similar to 2016. Nothing can be done for those developments except to not allow people to re-build unless they meet current elevation requirements. Telling people they can't rebuild is very hard politically, so they are allowed to re-build. They will flood again when the next large rain event occurs.
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