A WAVE-CURRENT SEDIMENT BOUNDARY LAYER

Keith Bedfor, Jongkook Lee

Abstract


A two-hour set of wave-current bottom boundary layer data collected at a dredged material placement site is examined with regard to establishing whether readily measured variables such as turbulent and wave kinetic energy (TWKE) correlate with more difficult to measure near bottom data. The data, collected in Mobile Bay, Gulf of Mexico, consisted of acoustic concentration profile data and velocity measurements at 50 and 114cm above bottom. The Reynolds Stress did not correlate well with any of the near bottom data including vertical flux and total water column mass. TWKE was a much more solid correlate with these variables but still was weak in correlating with near bottom mass. The wave kinetic energy was a solid correlate with near bottom data, particularly the mass in the bottom 5cm.

Keywords


boundary layer; sediment boundary layer

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