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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
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.


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/



Kanika Suri
Web Designer Associate

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

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


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