Tag: Levees

Engineering Standards for Levees and Floodwalls

Chapter 25. Levee Floodwalls, in Best Practices in Dam and Levee Safety Risk Analysis, US Army Corps of Engineers, 6 September 2012 (slides). Chapter 25. Levee Floodwalls, in Best Practices in Dam and Levee Safety Risk Analysis, US Army Corps…

Morganza to the Gulf of Mexico – EIS Resources

Review Plan for the Post Authorization Change Decision Document of the Mississippi River and Tributaries, Morganza to the Gulf of Mexico Hurricane Protection Project, LA – 2011 Final Independent External Peer Review Report for the Mississippi River and Tributaries, Morganza…

A Dutch perspective on coastal Louisiana flood risk

This is an interesting report commissioned by the United States Army’s London office. It assumes 2 feet of ocean rise over the next 100 years, and while it mentions subsidence, it does change its calculations based on subsidence in Louisiana.…

Playing Politics with Morganza?

Took a drive up to the Old River Control Structure and the Morganza Spillway on the 12th of May. I was curious about what is keeping the Corps from opening the spillway until the flow hits 1.5 M CFS. One…

The Mississippi River and Tributaries Project

The Mississippi River & Tributaries Project:Controlling the Flow – a description of the operation of the lower Mississippi flood control plan. (accessed May 8, 2011)

This is the Army Corps of Engineers explanation of the Mississippi River flood control system and how it would be used to control a flood. It details the the use of the floodways and the river flow levels that will trigger their use.[…]

Mississippi River Flood of 2011

At least as to river heights, the Flood of 2011 may be second or third largest Mississippi River Flood in modern times. Total volume of the flood is hard to compare because the river and the tributaries are more constrained than in the past. Water in a leveed river will be much higher than in a river without levees where it can spread out horizontally.

Projected flood heights – NOAA (Morganza floodway projections)[…]

The Control of Nature – Morganza Spillway

John McPhee has written a fascinating history of the River Control Structure at Morganza. While it is not clear that the Mississippi still wants to go down the¬†Atchafalaya, losing the River Control Structure in a flood would still be a…