Pentwater Channel Alignment
DNDBC (de g azim uth, com ing fr om )
Figure 11. Wave energy fraction passing pocket versus wave direction measured at NDBC buoy 45007,
in the model with the prototype data, model wave heights throughout the region between jetties
would be obtained with a high degree of confidence. Experiments would determine the impacts of
pocket wave absorbers on wave conditions in the navigation channel, as opposed to only those
adjacent to the vertical jetty wall. In addition, once validated, the model would be used to study a
wide range of incident wave conditions (wave heights, periods, and directions). Changes in pocket
wave absorber parameters (lengths, locations, stone sizes, slopes, etc.) would then be made to
develop design guidance. Prototype and physical model data will be used to validate the numerical
model, CGWAVE, for development of a pocket wave absorber "performance index," which is
relevant to the objectives of the monitoring study. The performance of Boussinesq (BOUSS-2D) will
also be evaluated using the available prototype and physical model data.
POINTS OF CONTACT: Questions relative to this CHETN may be addressed to Dr. Edward F.
Thompson at (601-634-2027), FAX (601-634-3433), or e-mail:
usace.army.mil or Mr. Robert R. Bottin, Jr., at (601-634-3827), FAX (601-634-4827), or e-mail:
, both of the Coastal Harbors and Structures Branch, Coastal and
Hydraulics Laboratory, U.S. Army Engineer Research and Development Center, or Dr. James P.
Selegean at (313-226-6791), FAX (313-226-2398), or email:
usace.army.mil of the U.S. Army Engineer District, Detroit. Additional information on the MCNP
As-Salek, Junaid A., and Schwab, David J. (2004). "High-frequency water level fluctuations in Lake Michigan," Journal
of Waterway, Port, Coastal and Ocean Engineering ASCE, 130(1), 45-53.
Carpenter, Donald D. (2001). "Wave energy dissipation in Great Lake harbor entrances," PhD diss. (civil engineering),
University of Michigan, Ann Arbor, MI.