GLIN==> UPCOMING SEMINAR

[Kanika Suri <Kanika.Suri@noaa.gov>]

Stephen Henderson, from the Scripps Institution of Oceanography, 
University of California, San Diego, will be giving a seminar on 
Wednesday, August 2nd, as a part of the NOAA/ University of Michigan 
Great Lakes Seminar Series.

Please find details of his talk listed below.

Title: Why There are Beaches (the influence of nonlinear wave boundary 
layers on shoreward sand transport)

Speaker: Stephen Henderson,  Scripps Institution of Oceanography, 
University of California, San Diego

Date: Wednesday, August 2nd

Time: 2:30 PM

Location: NOAA/ GLERL
             2205 Commonwealth Blvd., Ann Arbor, MI, 48105
Abstract
This seminar will discuss processes responsible for the shoreward sand  
transport that creates beaches. I will also briefly outline my  research 
on wave-wave and wave-current interactions.  Orthodox energetics-based 
sediment transport models, which neglect many aspects of boundary layer 
dynamics, sometimes fail to predict shoreward transport of sand on 
natural beaches. To study boundary layer  processes that drive sand 
shoreward, I developed an eddy-diffusive  numerical model of water and 
suspended sediment motion in the bottom boundary layer. This model was 
combined with measured free-stream
velocities to predict the erosion and accretion of a natural beach. 
After tuning of a single free parameter, the model successfully
predicted most of the erosion and accretion observed over several 
months. A wave-generated downward flux of shoreward momentum into the 
bottom boundary layer contributed to shoreward sediment transport. 
Shoreward sediment transport was further encouraged by the Stokes drift. 
Together, wave-generated momentum fluxes and the Stokes drift 
substantially increased shoreward transport, and were essential to 
successful predictions of erosion and accretion.

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If you have any questions or concerns, please email me at 
kanika.suri@noaa.gov; or call 734-741-2147.

For more information about the seminar series, please visit our website 
at http://www.glerl.noaa.gov/news/seminars/

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Kanika Suri
Web Designer Associate

NOAA Great Lakes Environmental Research Laboratory
2205 Commonwealth Blvd.,
Ann Arbor, MI
48105

Tel: (734) 741-2147
Fax: (734) 741-2055

www.glerl.noaa.gov

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