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.
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 language | English |
|---|---|
| Title of host publication | The Proceedings of the 20th Australasian Fluid Mechanics Conference |
| Editors | Greg Ivey, Nicole Jones, Tongming Zhou |
| Publisher | Australian Fluid Mechanics Society |
| Pages | 1-4 |
| Number of pages | 4 |
| ISBN (Print) | 9781740523776 |
| Publication status | Published - 2016 |
| Event | 20th Australasian Fluid Mechanics Conference - University of Western Australia, Perth, Australia Duration: 5 Dec 2016 → 8 Dec 2016 Conference number: 20 http://www.afms.org.au/20AFMC/ |
Conference
| Conference | 20th Australasian Fluid Mechanics Conference |
|---|---|
| Abbreviated title | ARMC |
| Country | Australia |
| City | Perth |
| Period | 5/12/16 → 8/12/16 |
| 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.