"Here's Why Mississippi River Diversion Was Proposed, How It Might Work"
"Picture an hourglass lying on its side, the top resting in the Mississippi River to capture the sands of time floating downstream from the Midwest. The sand flows through the neck of the hourglass and empties into Barataria Basin, where scientists predict it will create and nourish freshwater marshes and saltwater wetlands to stave off an expected dramatic loss of Louisiana’s coast over the next 50 years."