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dc.contributorUnited States. Army. Corps of Engineers. Memphis District.-
dc.contributorUnited States. Army. Corps of Engineers. Mississippi Valley Division.-
dc.contributorMississippi River Geomorphology and Potamology Program (U.S.)-
dc.contributor.authorGaines, Roger A.-
dc.contributor.authorPriestas, Anthony M.-
dc.description.abstractChanges in Mississippi River bed material gradations between Cairo, IL, and Head of Passes, LA, have been previously determined in 1932 and 1989. In November 2013, bed material samples were collected from the thalweg and across the channel width along a reach extending from Grafton, IL, to Head of Passes, LA. In all, 754 samples were collected at 496 locations, and results were compared to the earlier sampling programs. Results show that since 1932 the Lower Mississippi River bed sediments have become more uniform, the reach-averaged D₅₀ median grain diameter has reduced by approximately 50%, and the river has relatively fined upstream and coarsened downstream with little change since 1989.en_US
dc.publisherCoastal and Hydraulics Laboratory (U.S.)en_US
dc.publisherEngineer Research and Development Center (U.S.)-
dc.rightsApproved for public release; distribution is unlimited.-
dc.sourceThis Digital Resource was created in Microsoft Word and Adobe Acrobat-
dc.subjectBed Materialen_US
dc.subjectLaser diffractionen_US
dc.subjectMeander cutoffen_US
dc.subjectMississippi Riveren_US
dc.subjectParticle size analysisen_US
dc.subjectRiver engineeringen_US
dc.subjectSieve analysisen_US
dc.titleParticle size distributions of bed sediments along the Mississippi River, Grafton, Illinois, to Head of Passes, Louisiana, November 2013en_US
dc.typeTechnical Reporten_US
Appears in Collections:MRG&P Report

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