Statistics and characteristic scales for bed load in a channel flow with sidewall effects |
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| Authors: | Alessio Radice Francesco Ballio Vladimir Nikora |
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| Institution: | (1) D.I.I.A.R., Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy |
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| Abstract: | Results are presented for a long-duration sediment transport experiment with a plane bed. High-frequency time series of sediment
concentration, sediment velocity and solid discharge per unit width were measured using image analysis of video records. A
range of transport intensities from a single experiment has been analysed considering transport at different distances from
the sidewalls as an independent variable. First and second order temporal statistics of the spatially-averaged values of the
transport parameters are presented, which are in agreement with previous studies. A refined statistical analysis of the sediment
concentration dynamics, reflecting bed load process, is also given. The characteristic scales of the sediment concentration
dynamics are evaluated and analyzed in conjunction with those of the near-bed and bulk flow fields. |
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