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Title: Impact of near-bottom currents on dredged material mounds near Mobile Bay
Authors: University of South Alabama.
Florida Institute of Technology.
Dredging Research Program (U.S.)
Douglass, Scott L.
Resio, Donald T.
Hands, Edward B.
Keywords: Dredging
Monitoring disposal sites
Bottom currents
Dredged material uses
Nearbed hydrodynamics
Sediment fate predictions
Velocity asymmetries
Wave measurements
Mobile Bay
Publisher: Coastal Engineering Research Center (U.S.)
Engineer Research and Development Center (U.S.)
Description: Technical Report
Abstract: Repeated bathymetric surveys have shown persistent movement of hundreds of thousands of cubic meters of sand at two submerged berms off the Alabama coast. Over a 4-year period, bidirectional current measurements were made on top of and offshore of these migrating sand berms. These process data are used here to assess fundamental transport mechanisms that potentially could account for such berm movement. A simple conceptual model of sediment mechanics is proposed with five fundamental transport mechanisms that are evaluated against flow measurements. Certain transport mechanisms were, as a result, eliminated from further consideration. Other mechanisms were supported by the measurements and deserve further study.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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