Journal cover Journal topic
Earth Surface Dynamics An interactive open-access journal of the European Geosciences Union

Journal metrics

  • IF value: 2.000 IF 2.000
  • IF 5-year<br/> value: 2.000 IF 5-year
    2.000
  • CiteScore<br/> value: 1.84 CiteScore
    1.84
  • SNIP value: 0.628 SNIP 0.628
  • SJR value: indexed SJR
    indexed
  • IPP value: 1.689 IPP 1.689
  • h5-index value: 6 h5-index 6
doi:10.5194/esurf-2016-60
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
08 Dec 2016
Review status
This discussion paper is under review for the journal Earth Surface Dynamics (ESurf).
The influence of turbulent bursting on sediment resuspension under fluvial unidirectional currents
Sarik Salim1, Charitha Pattiaratchi1, Rafael Tinoco2, Giovanni Coco3, Yasha Hetzel1, Sarath Wijeratne1, and Ravindra Jayaratne4 1School of Civil Environmental and Mining Engineering and UWA Oceans Institute, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
2Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
3Faculty of Science, University of Auckland, Auckland 1142, New Zealand
4School of Architecture, Computing and Engineering, University of East London, Docklands Campus, 4-6 University Way, London E16 2RD, UK
Abstract. Laboratory experiments were undertaken in a unidirectional current flume in order to examine the role of turbulence on incipient sediment motion. An acoustic Doppler velocimeter was used to measure the instantaneous three-dimensional velocity components and acoustic backscatter (related to suspended sediment concentration). The relationship between wall turbulence (in particular, the "bursting" phenomenon) and resuspension of a non-cohesive sediment bed was examined. The results within a range above and below the measured critical velocity suggested that: 1) the contribution of turbulent bursting events remained identical in both experimental conditions; 2) ejection and sweep events contributed more to the total sediment flux than up-acceleration and down-deceleration events; and 3) wavelet transform revealed a correlation between the momentum and sediment flux in both test conditions. Such similarities in conditions above and below the measured critical velocity highlighted the need to re-evaluate the accuracy of a single time-averaged critical velocity for the initiation of sediment entrainment.

Citation: Salim, S., Pattiaratchi, C., Tinoco, R., Coco, G., Hetzel, Y., Wijeratne, S., and Jayaratne, R.: The influence of turbulent bursting on sediment resuspension under fluvial unidirectional currents, Earth Surf. Dynam. Discuss., doi:10.5194/esurf-2016-60, in review, 2016.
Sarik Salim et al.
Sarik Salim et al.
Sarik Salim et al.

Viewed

Total article views: 225 (including HTML, PDF, and XML)

HTML PDF XML Total BibTeX EndNote
170 47 8 225 7 10

Views and downloads (calculated since 08 Dec 2016)

Cumulative views and downloads (calculated since 08 Dec 2016)

Viewed (geographical distribution)

Total article views: 225 (including HTML, PDF, and XML)

Thereof 225 with geography defined and 0 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 28 Mar 2017
Publications Copernicus
Download
Short summary
The aim of this paper was to verify the existence of a critical velocity concept in terms of turbulent bursting phenomena. Laboratory experiments were undertaken in a unidirectional current flume where an acoustic Doppler velocimeter was used. Results in the laboratory conditions both above and below the measured critical velocity highlighted the need to re-evaluate the accuracy of a single time-averaged critical velocity for the initiation of sediment entrainment.
The aim of this paper was to verify the existence of a critical velocity concept in terms of...
Share