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New Corps Map Shows Time Estimates of Morganza Water

Posted on 5/13/11 at 6:16 pm
Posted by Bowe Knows
Member since Sep 2004
959 posts
Posted on 5/13/11 at 6:16 pm
WVUE showed a map on their 5:30 broadcast that was just released from the Corps. It showed the estimated time it will take for the Mississippi River water to reach areas after the Morganza Spillway is open.

This post was edited on 5/13/11 at 6:34 pm
Posted by Wiggles
Berwick, LA
Member since Jul 2010
350 posts
Posted on 5/13/11 at 6:21 pm to
Posted by Bowe Knows
Member since Sep 2004
959 posts
Posted on 5/13/11 at 6:32 pm to
Thanks.
Posted by longhorn22
Nicholls St. Fan
Member since Jan 2007
42528 posts
Posted on 5/13/11 at 7:31 pm to
so according to this map Thibodaux will get flooded?..
Posted by sheek
The Woodlands, TX
Member since Sep 2007
43976 posts
Posted on 5/13/11 at 7:36 pm to
west houma and gibson looks like they are fricked.
Posted by Wiggles
Berwick, LA
Member since Jul 2010
350 posts
Posted on 5/13/11 at 7:38 pm to
quote:

so according to this map Thibodaux will get flooded?.


Not necessarily. This doesn't show inundation, just the time to that particular area.
Posted by SpicyStacy
stout's fave
Member since Aug 2010
13344 posts
Posted on 5/13/11 at 7:49 pm to
St.Martin Parish
Posted by lsuwahmom
Member since May 2011
5 posts
Posted on 5/14/11 at 9:55 am to
Originally they said that Krotz Springs and Melville would see backwater about 7-8 days from the opening of the spillway. Now according to this map it says 36-48 hours. Could this map really be accurate or will it take longer than that?
Posted by the LSUSaint
Member since Nov 2009
15444 posts
Posted on 5/14/11 at 9:59 am to
Also, I think there is a high tide (which Im sure is figured in) during this process which probably accelerated the "backflow" part of the equation
Posted by LSUJuice
Back in Houston
Member since Apr 2004
17944 posts
Posted on 5/14/11 at 10:14 am to
quote:

Originally they said that Krotz Springs and Melville would see backwater about 7-8 days from the opening of the spillway.

I should edit to say that these two things are different. THe map only shows time for the Mississippi River water to reach these areas. It will take longer for them to flood. With that said, 7-8 days seems like a long time.
This post was edited on 5/14/11 at 10:49 am
Posted by agdoctor
Louisiana
Member since Dec 2004
3172 posts
Posted on 5/14/11 at 10:20 am to
The Morganza spillway will only let through the flow above 1.5 mcfs from the river. It will not flood nearly as fast as that map shows.
Posted by LSU Tigerhead
Metairie
Member since Nov 2007
5098 posts
Posted on 5/14/11 at 10:23 am to
Nice map. Thanks for posting it.
Posted by LSUJuice
Back in Houston
Member since Apr 2004
17944 posts
Posted on 5/14/11 at 10:30 am to
quote:

It will not flood nearly as fast as that map shows.

The map does not show time to FLOOD. The map only shows time for the Mississippi River water to reach the specified areas.
Posted by agdoctor
Louisiana
Member since Dec 2004
3172 posts
Posted on 5/14/11 at 10:36 am to
if the water reaches Hwy 190 in 12 hours the land from there back to the gates would not be flooded?
Posted by LSUJuice
Back in Houston
Member since Apr 2004
17944 posts
Posted on 5/14/11 at 10:42 am to
Meh, not initially. I imagine it would first find its way down there through the existing channels. Maybe it's just semantics and you're right, it's still a flood. We'll see in 48 hours!
Posted by JudgeHolden
Gila River
Member since Jan 2008
18566 posts
Posted on 5/14/11 at 10:47 am to
quote:

f the water reaches Hwy 190 in 12 hours the land from there back to the gates would not be flooded?


No. It is leveed in at that point. The water will come back around once the water gets south of the levee system. That is why Krotz Springs and Melville have ring levees. The Spillway water does not reach them directly, because the Atchafalaya levees send it south. But then the water comes back round the outside of those levees.
Posted by LSUlefty
Youngsville, LA
Member since Dec 2007
27437 posts
Posted on 5/14/11 at 11:20 am to
Looks like Amelia might get the worst of it.
Posted by LSUlefty
Youngsville, LA
Member since Dec 2007
27437 posts
Posted on 5/14/11 at 11:22 am to
Looks like Amelia might get the worst of it.
Posted by agdoctor
Louisiana
Member since Dec 2004
3172 posts
Posted on 5/14/11 at 12:47 pm to
quote:

It is leveed in at that point
.

When the water gets to 190 under the four mile bridge I guarantee you hwy 10 between Melville and the east Atchafalaya floodway levee will be under several feet of water
Posted by The Boat
Member since Oct 2008
172489 posts
Posted on 5/14/11 at 12:50 pm to
quote:

I guarantee you hwy 10 between Melville and the east Atchafalaya floodway levee will be under several feet of water


Well yeah
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