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re: -
Posted on 5/23/19 at 6:48 pm to Geauxtiga
Posted on 5/23/19 at 6:48 pm to Geauxtiga
I work for the company that runs most of the water gages in the Morgan City area and I actually run those specific ones. When the Atchafalaya River gets high, some of the water flows back into Bayou Chene (north) into the intercostal (east to Houma) and back into Bayou Boeuf (eventually into Lake Palourde). Sinking the barge south of the intersection of the intercoastal and Bayou Chene lessens the flooding impacts in Amelia/Belle River/Stephensville area from backwater. The water that is supposed to come up Bayou Chene goes the alternative route of Bayou Penchant into Lake Penchant.
1
Posted on 5/23/19 at 7:16 pm to couyon2
Thank you for the info. Had never heard of that strategy.
jimbeam, you too.
jimbeam, you too.
This post was edited on 5/23/19 at 7:17 pm
Posted on 5/24/19 at 11:29 am to Geauxtiga
wondering how much higher the Bayou Black marsh will be after the river water starts to flow through Penchant .
Posted on 5/24/19 at 11:44 am to cave canem
quote:
Scaremongers seem to forget the MS ran freely down the Atchafalaya for 150 years before the ORCS was put in place and the port of NO was the nations largest during this period.
Rivers change for a reason. The hydraulics of a river change. Just because it happened close to two centuries ago doesnt mean its going to happen again, especially considering the hydraulic difference in gradient between the MSR and Atch. River has increased since then.
If ORCS did fail and the Miss River ran down the Atchafalaya, I am curious what fresh water you think the petro chem corridor would use, or where New Orleans would get its drinking water from.
Posted on 5/24/19 at 11:46 am to cajunboatman
Cajunboatman you will be able to use a surface drive like an air boat if the marsh around penchant gets a couple more feet of water.
Posted on 5/24/19 at 12:11 pm to NYNolaguy1
So you're saying that if ORCS did fail, there would be absolutely no water flow down the MSR? Curios question. I dont think the entire river would flow down the atchafalaya.
Posted on 5/24/19 at 12:19 pm to BarryMcCokner
No it wouldnt. There would still be an assload of water going down the ms if you blew up the orcs. It wouldnt be enough to stop saltwater from pushing far upriver in the late summer/winter.
Posted on 5/24/19 at 12:20 pm to BarryMcCokner
quote:
So you're saying that if ORCS did fail, there would be absolutely no water flow down the MSR? Curios question. I dont think the entire river would flow down the atchafalaya.
The thought is that when the majority of flow goes down the AR, sediment would start to deposit in that turn and eventually build a bank blocking any other water that would go down the MR
Posted on 5/24/19 at 12:21 pm to BarryMcCokner
quote:
So you're saying that if ORCS did fail, there would be absolutely no water flow down the MSR? Curios question. I dont think the entire river would flow down the atchafalaya.
I do think there would be some flow, but at drastically reduced levels reducing over time, and wherever the riverbed meets 0'0" elevation, that comes the new mouth of the river, most likely somewhere between New Orleans and Baton Rouge.
There would still be a port for New Orleans, but it would be a saltwater one, not freshwater.
Posted on 5/24/19 at 12:40 pm to DownshiftAndFloorIt
shite it pushes up currently if it gets slow enough
Posted on 5/24/19 at 4:48 pm to jimbeam
You can look at the level from the Baton Rouge gage at low water and there is definitely a tidal influence.
Posted on 5/24/19 at 5:04 pm to BarryMcCokner
The whole discussion is pretty mute because the ORCS is one of the least likely places to fail in the system. They pumped more concrete into that thing than fort Knox. Much more likely a levee failure due to runaway barge or washout.
Posted on 5/24/19 at 5:12 pm to jimbeam
In the shape of a wedge, because apparenty salt water has a greater specific gravity than fresh water or it's denser or some shite I forget from Chemistry class.
A few years back, like maybe 15 or 20, we had unusually low water. The salt water wedge was way up the river, I want to say approaching Belle Chasse. The USACE dredged sediment and built a berm across the river. It was deep enough to not impede shipping, but high enough of the bottom to stop the wedge before it reached the water intakes. I thought that was pretty cool.
A few years back, like maybe 15 or 20, we had unusually low water. The salt water wedge was way up the river, I want to say approaching Belle Chasse. The USACE dredged sediment and built a berm across the river. It was deep enough to not impede shipping, but high enough of the bottom to stop the wedge before it reached the water intakes. I thought that was pretty cool.
Posted on 5/24/19 at 6:37 pm to FelicianaTigerfan
I know that area well, if it blew thru just south of Black Hawk It would be a straight shot to Simmesport. The east bank is high bank los hill I am no hydrologists but I can see where once the cut started the east bank would push the MS River flow west and actually cut the flow off completely in a very short period of time if not immediately,
If you ever go down there and see the lay of the land there is definitely a reason the ORCS is where it is.
If you ever go down there and see the lay of the land there is definitely a reason the ORCS is where it is.
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