2011 Mississippi River Spring Floods

[MC Cajun]

_ One thing I have maintained throughout this discussion is that the reduction of stage level did not automatically mean reduction in flow. It possibly COULD, but other things needed to be checked before making that definitive statement. Attached to this link are hydrographs for the Stage, Velocity, and Discharge of the Vermilion River at Surrey St for the last 3 days. In this particular case, when the stage lowers, the concurrent velocity hydrograph is almost perfectly INVERSELY related. Then, it is very obvious that the velocity and Discharge Hydrographs are DIRECTLY related. So, as you can see, where the river dropped a half foot, in that EXACT TIME, the flow rate has nearly doubled. Yes, twice the amount of water flowing under the Surrey St Bridge as the river has dropped.


http://nwis.waterdata.usgs.gov/la/nw...te_no=07386880 _

http://waterdata.usgs.gov/la/nwis/uv...te_no=07374000

http://waterdata.usgs.gov/ms/nwis/uv...te_no=07289000


http://waterdata.usgs.gov/la/nwis/uv...te_no=07381600

Wouldn't these be more relevant ?

[HelmutVII]

_ http://waterdata.usgs.gov/la/nwis/uv...te_no=07374000

http://waterdata.usgs.gov/ms/nwis/uv...te_no=07289000


http://waterdata.usgs.gov/la/nwis/uv...te_no=07381600

Wouldn't these be more relevant ? _

Yes those discharge hydrographs do tell a very interesting story I have been watching those for the last week now. I did notice that the Average discharge for the Vermilion river to be only 951 cfs with a maximum of 4650 in 2004. I would have thought that the average would be a little bit more.

I always like to use discharge hydrographs, when I can, to get a better handle on volume developed over time. They are very useful when doing retention basin design. I like hydrographs, you can get a very good picture of the situation at a glance.

If you go here

http://www.srh.noaa.gov/lmrfc/?n=lmr...oriverforecast

you will notice some plus differentials in the upper reaches of the Mississippi. I didn't think that was much - until I clicked on "Mississippi River Hydrographs" link and saw the predicted stages for a station like Cape Girardeau where they are predicting 40.5 (roughly) on June 1 or about 1.5' below a major flood stage and about 5.0 feet higher than it is today. It looks like it may be trending to an inflection point but it will take a couple of more days before we can tell. Lets hope we can keep the stages down here on a continued down trend so we can take this new bump without major problems. If things hold true to form, then this new bump should make it down here by late second or early third week in June. Only then, will we be able to be looking back at this event. Lets also hope there is not any more rain up there either and let them send it down here because we really need it.

[CajunRed]

Thanks for the update, Helmut.


igeaux.mobi

[NewsCopy]

How much water and sediment enters the area, where it ends up, and what that means to the future of the Atchafalaya Basin are questions that U.S. Geological Survey researchers at the Louisiana Water ... Research Center in Lafayette. "It'll be a cleansing ...

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[Chop]

Whats the deal?
Kyle leaves this thread and it dies?

Lets read some charts fellas.

[NewsCopy]

due to anticipated flooding." Even stubborn Cajuns took seriously the Army Corps of Engineers' warnings of water up to the ceilings. Upstream from Whiskey River, Tucker Friedman hauled the contents of his Atchafalaya Landing store -- groceries, coolers ...

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[CajunRed]

I went ride to Tucker's place yesterday (Saturday) and then picked up a seafood platter to go from McGee's. I know it wasn't much, but I wanted to show support for these business owners who work so hard to support our Cajun culture.

My gut feel is that the high mark in Henderson Lake will be about 22 feet...which is about 2 feet above what it is right now. I've been landing my various bass fishing boats at these landings since 1968...and I hope they make it thru this.

igeaux.mobi

[CajunRed]

Lake Fausse Point was reopened on Friday. And the Butte La Rose road off of I-10 along the levee is also opened all the way thru Butte La Rose...then turning towards the pontoon bridge. It is then closed at the park, which is halfway to the bridge. There is water over the road there, so it will stay closed for a while yet.

igeaux.mobi

[Turbine]

Were the pumps turned on for the Vermilion River, or is all the water coming up from the Gulf?

[NewsCopy]

So, it's been six events in a six-year period. How are we coping with it? It's part of who we are. What I've always said is that us Cajuns are a bunch of MacGyvers. We can take a paper clip and a rubber band and fix anything with it and make anything work.

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