This has enabled a detailed comparison to be made between the turbulent flow and the sediment response to the instantaneous flow conditions. The acoustic technique, unlike a conventional bedload sampler, has allowed estimates of transport to be obtained with a temporal resolution comparable with the turbulence data collected. Visual estimates of bedload were also obtained with an underwater TV camera. The turbulence in the bottom boundary layer was measured using two electromagnetic current meters, and the gravel transport was measured using a passive acoustic system which monitored the interparticle collision noise of locally mobile material. more Measurements of the nearbed turbulent current flow and the bedload transport of marine gravel have been made over three tidal cycles. Measurements of the nearbed turbulent current flow and the bedload transport of marine gravel hav.
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