A BOTTOM BOUNDARY LAYER SEDIMENT RESPONSE TO WAVE GROUPS

J. Lee, S. O'Neil, K. Bedford, R. Van Evra

Abstract


A field experiment measured in situ sediment resuspension in the bottom boundary layer. Spatially and temporally dense suspended sediment concentration profiles, three-dimensional velocities and pressures were obtained from a location with a flat, fine-sand bottom in Lake Erie in 1992. By use of a conceptual model, ten minute averaged near bottom sediment concentration is found to be proportional to significant wave orbital velocity and group wave parameters. The result attempts to clarify the ambiguity of using a monochromatic wave parameterization for bottom boundary layer model comparisons with measured data containing spectral wave conditions.

Keywords


wave group; bottom boundary layer; sediment response

Full Text: PDF

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.