2019 Mississippi River

[ZoomZoom]

They could make the vermilion river a mile deep. It won't help. They need to make it wider at the top. As Carl Sagan said "the laws of physics are universal and they can not be broken.".

Most of the area south and east of Youngsville drains to the Parc Perdu. Nobody taking about that.

The end result of dredging is some "poor" landowner will be paid to receive the spoils. The contractor sells the sinkers, and people like me are amused by the number of stolen vehicles that will be recovered.

Went to the meeing at the southside library last night discussing drainage. The Youngsville situation was brought up and the fact a lot of the water east of 90 drains thru Youngsville. Additionally, Vermilion Parish is allegedly against dredging the river.

Allegedly the big problem we have in Lafayette is these rentention ponds that are built are for a 5 year flood event, not 100 year.

I use the word "allegedly" since these were mostly politicians speaking, abet one engineer with hydrological experience.

[HelmutVII]

The coulees in my neighborhood at the south end of K Saloom all drain into the Vermilion. Would dredging not allow the river to flow to the Bay faster and move more water downstream faster?

No. If you have a glass that's half full and you want to put more water in it where is is going to go? The top half right. It's all about water SURFACE elevation. Not depth of flow.

[HelmutVII]

The end result of dredging is some "poor" landowner will be paid to receive the spoils. The contractor sells the sinkers, and people like me are amused by the number of stolen vehicles that will be recovered.

Went to the meeing at the southside library last night discussing drainage. The Youngsville situation was brought up and the fact a lot of the water east of 90 drains thru Youngsville. Additionally, Vermilion Parish is allegedly against dredging the river.

Allegedly the big problem we have in Lafayette is these rentention ponds that are built are for a 5 year flood event, not 100 year.

I use the word "allegedly" since these were mostly politicians speaking, abet one engineer with hydrological experience.

Who said that runoff east of 90 drains through Youngsville? Were they sober?

[cajun4life]

The end result of dredging is some "poor" landowner will be paid to receive the spoils. The contractor sells the sinkers, and people like me are amused by the number of stolen vehicles that will be recovered.

Went to the meeing at the southside library last night discussing drainage. The Youngsville situation was brought up and the fact a lot of the water east of 90 drains thru Youngsville. Additionally, Vermilion Parish is allegedly against dredging the river.

Allegedly the big problem we have in Lafayette is these rentention ponds that are built are for a 5 year flood event, not 100 year.

I use the word "allegedly" since these were mostly politicians speaking, abet one engineer with hydrological experience.

Pretty sure DEQ would classify dredged spoil from the Vermilion as hazardous. So who is gonna foot the bill for reclamation our disposal?

[Cajunrunner]

Who said that runoff east of 90 drains through Youngsville? Were they sober?

He did say it was politicians speaking. Remember that bill to drug test State Legislators???

[Cajun90]

No. If you have a glass that's half full and you want to put more water in it where is is going to go? The top half right. It's all about water SURFACE elevation. Not depth of flow.

I think NAVD88 at LA 733 is zero. Not much slope to get things moving. As you say dredging isn't the answer.

Years ago Houston was talking about potentially putting thrusters in Buffalo Bayou in order to try and increase velocity. Never happened but it was a thought at the time.

[STPacronym]

Regional retention/detention is likely the answer.

[HelmutVII]

I think NAVD88 at LA 733 is zero. Not much slope to get things moving. As you say dredging isn't the answer.

Years ago Houston was talking about potentially putting thrusters in Buffalo Bayou in order to try and increase velocity. Never happened but it was a thought at the time.

If you go here

https://waterdata.usgs.gov/la/nwis/uv?site_no=07386940

and select gauge height you will see that the water level is reported and displayed every fifteen minutes or so. Select "graph" as the option and select "gauge height". during periods of low flow (no rain) you will see the water level varies and has "about" two highs and two lows a day. the past few days the water level has been bouncing back and forth around elevation 4.0 NAVD88. The highs and lows correspond to the high and low tides. The gauge is at about Mile 45 of the river. That means there is 4.0 feet of fall in the water surface in 45.0 miles. (that is not much at all). That means the bottom of the river is below sea level. The water below elevation 0.0 (give or take) CANNOT move as fast as the water above elevation 0.0 because that is the level of the Gulf of Mexico. When water levels get low velocities get low and the water starts to drop its silt. When water levels get high velocities increase and the bottom of the river is scoured (to a degree). Basically, any portion of the conveyance area of the river that is below elevation 0.00 NAVD88 is useless as a conveyance for water. Trust me on this.

[Cajun90]

Basically, any portion of the conveyance area of the river that is below elevation 0.00 NAVD88 is useless as a conveyance for water. Trust me on this.

Yes and I'm pretty sure most of the population in the area doesn't understand this concept. Its time for people in this area to start understanding their risk better and realize that little to nothing is going to happen to significantly change flood levels. Retention areas would help but were talking about some rather large lakes to be of any signifigance. These small attempts when they build a neighborhood to do retention ponds are not much more than a false sense of security.

The real answer in my opinion.... build higher.

[ZoomZoom]

Who said that runoff east of 90 drains through Youngsville? Were they sober?

Forgot the name, on Ritter's staff at Youngsville. Supposedly all the swamp area near airport and south goes thru Youngsville.

One of those "had to be there" to get the full experience. Was suppose to be about drainage, but was 50/50 political. I'd go into more detail but don't want to go there, but I left disappointed overall.

I must admit, I enjoyed the "altar call" where one lady announced her candidacy for city council after multiple calls for people to run for office.