Waves in Entrance Channels
Description
Develop a numerical model to improve wave predictions in the Corps-critical area of
entrance channels.
The prediction of wave conditions in channels is
Issue
complicated by the abruptness of the channel
geometry, wave nonlinearities, and by the presence
of structures and currents.
Present Corps
numerical wave and harbor model technology is
based on approximations that are not accurate in
channels and incorporate structures in a
rudimentary way. Physical models are used in
many channel designs, but they are costly to build.
Numerical wave simulation technology will allow
evaluation of Corps channel designs, structure
designs, and dredging alternatives, and will
improve sediment management simulation
allowing the Corps to choose the most cost-effective alternatives.
Corps Districts Offices.
Users
Products
A Boussinesq model was targeted as the technology leader for integrated wave modeling
in entrance channels. The model BOUSS-2D has been enhanced to include the interaction
between waves and structures (reflection, transmission, dissipation, runup, and
overtopping), which is critical to accurate wave predictions in channels. The model has
been verified to reproduce the generation of long waves in harbors that cause disruptive
harbor oscillations. The model has also been applied to the combined problem of shallow-
water wave breaking and generation of surf zone currents. BOUSS-2D has been
documented in a user's guide, and the model has been implemented in the Surface-water
Modeling System user interface. The interface simplifies user input and visualization of
results. Present efforts focus on a long-wave toolbox, improved user interface, and
additional documentation. A user workshop has been held to put the model in the hands of
users. Another workshop is scheduled for August 2005 in San Francisco, California.
The numerical wave simulation technology offers evaluation of Corps channel designs,
Benefits
structure designs, dredging alternatives, and improve sediment management simulation
allowing the Corps to choose the most cost-effective alternatives.
Navigation Systems Program. Program Manager: James Clausner.
Corps Program
Points of Contact
Dr. Jane McKee Smith at 601-634-2079 (jane.m.smith@erdc.usace.army.mil) and Dr.
Zeki Demirbilek at 601-634-2834 (zeki.demirbilek@erdc.usace.army.mil).
Prof. Okey Nwogu, University of Michigan.
Partners
U.S. Army Engineer Research and Development Center
7 April 2005
Coastal and Hydraulics Laboratory (Research)
www.erdc.usace.army.mil
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