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REVIEW ARTICLES

Measurements and Analysis of Flow Velocity and Sediment Concentration at the Seabed

[+] Author and Article Information
D. Myrhaug

Department of Marine Hydrodynamics, Norwegian Institute of Technology, N-7034 Trondheim, Norway

O. H. Slaattelid

Norwegian Marine Technology Research Institute, PO Box 4125, N-7002 Trondheim, Norway

R. L. Soulsby

HR Wallingford, Wallingford, Oxfordshire OX10 8BA, United Kingdom

K. F. Lambrakos

Exxon Production Research Company, PO Box 2189, Houston TX 77001, USA

Appl. Mech. Rev 48(9), 570-588 (Sep 01, 1995) (19 pages) doi:10.1115/1.3023146 History: Online April 29, 2009

Abstract

A review of flow velocity and sediment concentration measurements on field sites is given, but the main emphasis is on the data analysis results of near-bottom measurements of flow velocities and suspended sediment concentrations over a sandy bottom during four storms in the central North Sea. The water depth was 70 meters and the seafloor consisted of fine sand of 0.20 mm average diameter. The measurements included sediment concentrations, flow velocity in the boundary layer on the seafloor, steady current over the water column, wave heights, and photographs of the seafloor. The paper presents the variation of the sediment concentrations, waves and currents during the storms. Results from the logarithmic boundary layer flow model fit to the current measurements using the roughness (z0 ) and friction velocity (u*) as fitting parameters are also given. It also gives limited comparisons of model predictions with the data. The predictions are obtained from a wave-current interaction model combined with three different moveable bed models, which predict ripple size and sediment transport effects on the bed roughness.

Copyright © 1995 by The American Society of Mechanical Engineers
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