2019 Mississippi River

[Cajun90]

Retention ponds are typically designed on a 10 or 25 year event. Flood zones are 100 year events. Most ponds I design are innundated in a 100 year model. As return periods jump from 25 to 100 year events the rainfall rates reduce but the ground conditions change because there is more water on the ground. One inch of rain falling on land is different than one inch of rain falling on water (runoff rates for water is 100%). While retention ponds are very effective for more frequent events, they are basically useless for 100 year events.

Agreed. Was trying to give a quick answer to the question about "slope". My point being that individual developments have gotten better about not contributing to the issue of adding to offsite flooding. Still could be improved but there are larger concerns. Some we can control and some we cannot.

It is interesting how water rules the world to a large extent. Some, such as us, often have too much while others have too little. Out West there have been discussions on the legality of rain collection systems on private property. The argument being that they are capturing a "public" water source for private usage.

Many don't understand the political power of water around the world either. In many countries those that control the water have the power. Especially if we are talking clean drinking water. Water is one of the biggest weapons utilized in third world countries.

[HelmutVII]

Agreed. Was trying to give a quick answer to the question about "slope". My point being that individual developments have gotten better about not contributing to the issue of adding to offsite flooding. Still could be improved but there are larger concerns. Some we can control and some we cannot.

It is interesting how water rules the world to a large extent. Some, such as us, often have too much while others have too little. Out West there have been discussions on the legality of rain collection systems on private property. The argument being that they are capturing a "public" water source for private usage.

Many don't understand the political power of water around the world either. In many countries those that control the water have the power. Especially if we are talking clean drinking water. Water is one of the biggest weapons utilized in third world countries.

The number one characteristic of a developed nation is the adequate supply of safe drinking water. The number two characteristic of a developed country is the adequate collection and treatment of waste water. The number one vector for disease is contaminated water. Go to a third world country and what is the first thing you smell?......... Sewage.

[HelmutVII]

Oh yeah I forgot, If you live in a parish or county that is adjacent to the Gulf of Mexico, I would buy flood insurance. Almost every drainage channel adjacent to the gulf is influenced by tides. If it is influenced by tides then it is probably subject to storm surge. Even some portions of extreme south Lafayette Parish could be subject to storm surge.

[zephyr]

You are missing the point. There is significant difference in elevation in Lafayette parish when it comes to flooding concerns. Flood maps have historically done a very poor job of showing this.

The August 2016 storm is a prime example. Being one foot above BFE versus three feet above BFE could easily have been the difference in flooding or not flooding your home. For most people it is very difficult for them to fully understand that risk. All they are told is that "they don't have to have flood insurance" because they aren't in a special risk area.

And yes there is certainly property in South La. at 20-25 feet above BFE but that is an outlier. More important is for those that are right at that 1 ft. BFE and have this false sense of security.

I will certainly have to ask Helmut for that info on being 20-25 feet above BFE. Like he mentioned, BFE is identified in areas of higher risk such as Flood Zone A & AE. BFE's change throughout the floodplain. It just seems odd to be in a flood plain to all of a sudden 25 feet above it. If you go to the LSUagcenter website and look at the floodplain, there are different BFE's throughout depending on the topography.

Also, in times of flooding I've seen properties identified as being in Flood Zone X to have flooded and properties in Flood Zone A not getting anything. I agree with you that flood insurance coverage should not be determined by a line on a map as I think you are suggesting because of these differences and the maps were never perfect to say the least.

[CajunVic]

I will certainly have to ask Helmut for that info on being 20-25 feet above BFE. Like he mentioned, BFE is identified in areas of higher risk such as Flood Zone A & AE. BFE's change throughout the floodplain. It just seems odd to be in a flood plain to all of a sudden 25 feet above it. If you go to the LSUagcenter website and look at the floodplain, there are different BFE's throughout depending on the topography.

Also, in times of flooding I've seen properties identified as being in Flood Zone X to have flooded and properties in Flood Zone A not getting anything. I agree with you that flood insurance coverage should not be determined by a line on a map as I think you are suggesting because of these differences and the maps were never perfect to say the least.

This is pretty Phucing funny.

[zephyr]

This is pretty Phucing funny.

You have no idea what you are reading do you? LOL. And I thought cursing was the sign of a small person?

[CajunVic]

You have no idea what you are reading do you? LOL. And I thought cursing was the sign of a small person?

You have no clue about flooding, baseball, football, tennis, softball and obviously you have no clue about phucing. Look it up and you might learn something today.

[zephyr]

You have no clue about flooding, baseball, football, tennis, softball and obviously you have no clue about phucing. Look it up and you might learn something today.

Consider there is not ONE thing you contribute to this forum, I find that pretty funny. Keep the trolling up though. I guess that great job you got affords you the time to do it...

[CajunVic]

Consider there is not ONE thing you contribute to this forum, I find that pretty funny. Keep the trolling up though. I guess that great job you got affords you the time to do it...

You go get them, flood contol specialist. Your posts are most entertaining. I guess next week you will specialize as a surgeon or maybe a rocket scientist.

[zephyr]

You go get them, flood contol specialist. Your posts are most entertaining. I guess next week you will specialize as a surgeon or maybe a rocket scientist.

I think the thing is you don't know how to judge if someone knows anything about something. You live in your own warped world of irrationalization and bad spelling. I mean, you're the baseball expert. The board has seen it and is truly amazed. Keep up the good fight Vickie.