Video observations of marine gravel transport |
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| Authors: | Jon J Williams |
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| Institution: | (1) Proudman Oceanographic Laboratory, Bidston Observatory, L43 7RA Birkenhead, Merseyside, UK |
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| Abstract: | In an analysis of video observations of gravel transport in the West Slent, UK, collective and individual characteristics of 458  bursts of bedload have been examined and the transport velocity and distance of 1680 individual particles in a consecutive succession of burst events determined. Infrequent, long duration, high stress events account for 60% of total transport in only 24% of the total time with the mean free path and transport velocity for particles being 0.16 m and 0.22 m/s, respectively. Clear links between intense intermittent turbulence and bedload transport revealed in this study, suggest progress in modelling requires a clearer understanding of near bed flow structure. |
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