Experimental data of sediment bed behaviour in a current

This data set has been collected in annular flume experiments with bimodal sand mixtures at the University of Waikato, New Zealand. Medium sand (D50,c = 400 µm) was mixed with 40 % fine material of different diameters (D50,f = 53; 111; 193 µm) and subjected to increasing flow velocities (U = 1.3-22.2 cm/s). The near-bed hydrodynamics, the bed level and the suspended sediment concentration were investigated. In the affiliated publication (DOI: 10.1002/esp.4559) selected results are compared with results from similar tests with glass beads.

This data set comprises: 1) grain-size distributions of the sand mixtures ("GrainSizeDistr_N") and glass beads ("GrainSizeDistr_GB") 2) averaged flow velocity profiles in m/s ("N_RD_number_Uxy_interval" and "GB_RD_Uxy_interval") 3) detailed timeseries of the bed level in m below the ADV profiler ("N_RD_number_Bottom") 4) suspended sediment concentrations in mg/l ("N_RD_number_SSC")

"RD" is a measure for the grain-size distribution of the mixture (see publication). The experiments with natural sand (N) were repeated three times, the "number" of the experiment is indicated in the file names. For experiment N_77 only the data of the 3rd replication is provided. Every experiment comprised 12 "intervals" with increasing flow velocities. For each interval the averaged flow velocity profile is provided. Please refer to DOI: 10.1002/esp.4559 for further information about instrumentation etc.