http://droughtreporter.unl.edu/

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The US Army Corps of Engineers is constructing a temporary 1,500-foot-wide underwater levee in the Mississippi River to prevent saltwater from pushing up the river amid record-low river levels and flow rates. Sediment will be dredged from the river and piled up near Myrtle Grove, Louisiana, downstream from New Orleans, to make a sill to dam the denser saltwater downstream. When the river’s flow is less than 300,000 cubic feet per second, there is insufficient force to keep the saltwater from creeping upstream. The flow of the Mississippi River has been around or below 200,000 cubic feet per second for more than a week, according to data from the US Geological Survey. CNN (Atlanta, Ga.), Oct 18, 2022