Assessing the relationship between bed shear stress estimates and observations of sediment resuspension in the ocean

Cynthia Bluteau, S.L. Smith, Gregory Ivey, Tamara Schlosser, Nicole Jones

Research output: Chapter in Book/Conference paperConference paper

2 Citations (Scopus)

Abstract

We present observations from a three week field programme
on the Tasman Eastern Continental Shelf designed to determine
the mechanisms responsible for sediment resuspension when
tidally-forced internal waves impinge on the shelf. Using a bottom
lander on the seafloor at the 190 m isobath, we measured
sediment concentrations, velocities, and turbulent stresses near
the seabed. The bed shear stress estimated using the quadratic
drag law had the highest correlation with the observed sediment
concentrations, but were always much higher than the
critical shear stress required to initiate sediment motion. Bed
shear stresses determined from the turbulence measurements
were more reasonable in magnitude, but unresolved questions
remain. Our ultimate goal is to improve predictions of nearbed
shear stresses, and sediment re-suspension in these complex
flows.
Original languageEnglish
Title of host publicationThe Proceedings of the 20th Australasian Fluid Mechanics Conference
EditorsGreg Ivey, Nicole Jones, Tongming Zhou
PublisherAustralian Fluid Mechanics Society
Pages1-4
Number of pages4
ISBN (Print)9781740523776
Publication statusPublished - 2016
Event20th Australasian Fluid Mechanics Conference - University of Western Australia, Perth, Australia
Duration: 5 Dec 20168 Dec 2016
Conference number: 20
http://www.afms.org.au/20AFMC/

Conference

Conference20th Australasian Fluid Mechanics Conference
Abbreviated titleARMC
CountryAustralia
CityPerth
Period5/12/168/12/16
Internet address

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Cite this

Bluteau, C., Smith, S. L., Ivey, G., Schlosser, T., & Jones, N. (2016). Assessing the relationship between bed shear stress estimates and observations of sediment resuspension in the ocean. In G. Ivey, N. Jones, & T. Zhou (Eds.), The Proceedings of the 20th Australasian Fluid Mechanics Conference (pp. 1-4). Australian Fluid Mechanics Society.