Without enough freshwater flow, seawater is making its way up the Mississippi River and is expected to reach New Orleans by mid-October.
"What happens is if we don't get a lot of rainfall in the upper parts of the Midwest … that's really where all the flow comes from," Graschel said. "By the time the Ohio and the Mississippi Rivers come together, that's about 90% of the water that comes down to part of the lower part of the Mississippi River near New Orleans."
"The salt water wants to move in, and the power of the river keeps it back. We need 300,000 cubic feet per second to push the saltwater back into the Gulf. Right now, we have 150,000, so we have half of what we need," U.S. Army Corps of Engineers New Orleans District Public Affairs Chief Ricky Boyett said., has not made it far enough west to help with the extreme drought conditions in the Mississippi River.
This situation does occur, but usually, about every 10 years and the U.S. Army Corps of Engineers will put a low-water sill on the bottom of the river to impede the salt water from moving upstream. "It will buy time so that the local parishes in the state, as well as the federal government, have opportunities to get other measures in place," Boyett said.
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