sediment transport

Subaqueous and subaerial currents with net deposition

These experiments use an inflow to transport sediment and build sedimentary deposits. Under the subaqeuous basin condition, the basin is filled with fresh water and a density current is generated using saline solution. Under the subaerial basin condition, fresh water is supplied to the basin.

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SAFL density current basin

Basin for fluvial sediment transport experiments, including density currents. Two slope breaks in the basin favor sediment deposition, with a maximum accomodation space of approximately 5 cm. The bed slope is adjustable. Pumps are used to supply inflow and to control the water level.

Data acquisition options include overheard photos and topographic scanning.

Size: 4.0 m x 1.0 m x 0.5 m (length, width, height)

 

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Ensemble Distributions of Particle Motions

Data here was collected at the River Dynamics Laboratory at Arizona State University.  Measurements of particle motions were obtained using a manual tracking method within the program ImageJ.  The data include 1250 frames or 5 seconds of high-speed imagery, associated coordinates of particle motions, and derived measurements of particle motions (e.g. instantaneous velocities, particle accelerations, hop distances, and travel times).  

Manual Measurements of Distributions of Particle Motions

This experiment was performed in the recirculating flume at the Arizona State University River Dynamics Laboratory. 

Flow velocities in the flume were measured using an acoustic Doppler velocimeter (ADV) positioned approximately 1 cm above the bed, the time-averaged velocity near the bed was 31.0 cm sec-1 with a flow depth of 12.5 cm. The bed material used in this experiment is a uniform, coarse sand with an average diameter D50 of  0.05 cm.  The stream bed was prepared by smoothing it flat prior to the start of the experiment.

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Recirculating Flume – River Dynamics Laboratory at Arizona State University

Ideal for precision sediment transport research with available placement for high-speed imagery cameras, laser sheet for PIV measurements, and ADV.

Size: 8.5m x 0.3m

Features:

  • Glass observation walls.
  • Plexiglass ‘sled’ window placed on surface- provides clear view of the bed, free of distortion created by light refraction in the water surface. 
  • False floor allows for instruments to enter from beneath the floor bed
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Density Current Confluence Velocity Data

Data collected and processed by H. Ismail et al during density current confluence experiments at the University of South Carolina Hydraulics Lab (2013-2015). In all files, x, y, and z denote down-stream, cross-channel, and vertical coordinates, respectively. The origin is the upstream junction point on the flume bed. u and v denote velocity in the x and y directions, respectively. U and H are depth-averaged velocity and current thickness, respectively.

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Field saltation observations

Raw and processed data from three field campaigns on active aeolian saltation:

  • Jericoacoara, Ceara, Brazil, November 2014
  • Rancho Guadalupe, California, USA, March 2015
  • Oceano, California, USA, May-June 2015

Data can be accessed through Google Drive.

"Raw" data folder contain both:

University of South Carolina at Columbia Unidirectional Sediment-Feed Tilting Flume

Specifications and features for the unidirectional, sediment-feed tilting flume at the Hydraulics Laboratory of the Department of Civil and Environmental Engineering of the University of South Carolina at Columbia.

Bedform Dynamics and Stratigraphy Experimental Set-up

 Conditions: