Measurements of sediment transport on the sea bed southwest of England |
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| Authors: | J Hardisty D Hamilton |
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| Institution: | (1) Marine Sedimentation Research Group, Department of Geology, Queens Building, University Walk, BS8 1TR Bristol, UK |
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| Abstract: | Sand transport rates were measured via bedload traps that were inserted into the sediment surface on the continental shelf southwest of England. Analysis of the trapped mobile sediment shows this to be finer and better sorted than nearby Shipek grab samples. The transport rates are combined with simultaneous, near-bed flow measurements to assess a Bagnold type predictive equation,j = k
1(u
2
100 -u
2
100cr)u
100. The measured transport rates vary between 0.41 × 10–3 and 1.67 × 10–3 gm/cm s. The data yield a mean calibration coefficient (k
1) of 0.4 × 10–6 which is slightly lower than values computed from flume and shallow water data. |
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