CONCLUSIONS
An extensive hydrodynamic study of Grays Harbor, Washington was conducted
including data collection in Fall 1999and numerical model simulations. The measurements
show considerable wave attenuation through the inlet throat (factor of 10 decrease), flood
currents strongest on the north side of the inlet, and ebb currents more uniformly
distributed. The numerical models include wave and tidal circulation simulations and the
effects of tidal currents and change in water level on waves in an inlet entrance. Ebb
currents have the greatest influence and increase wave height 0.5-1.5 m. Flood currents
increase wave height at the seaward end of the entrance due to a local bathymetry-induced
flow reversal and reduce wave height (flatten waves) further inside the inlet entrance.
Water level has a minimal impact on waves in the inlet entrance, but does control wave
transformation in the back bay. Examination of the effect of tidal currents on wave
transformation and the modification of the current through wave radiation stresses will be
examined in the next stage of dynamic linking of models through the CIRP Steering
Module.
ACKNOWLEDGEMENTS
This work was performed as part of a mission-support activity for the U.S. Army
Engineer District, Seattle. Permission was granted by Headquarters, USACE to publish
this information. The cooperation of instrument manufacturers named in this work is
acknowledged, but no endorsement of equipment is implied.
REFERENCES
Davis, J. E. 1992. "STWAVE theory and program documentation," Coastal Modeling
System User's Manual. Chapter 8, Instruction Report CERC-91-1, Supplement 1, M.A.
Cialone, ed., U.S. Army Engineer Waterways Experiment Station, Vicksburg. MS.
Le Provost, C., Genco, M. L., Lyard, F., Vincent, P., and Cenceill, P. 1994. "Spectroscopy
of the world ocean tides from a hydrodynamic finite element model," Journal of
Geophysical Research 99(C12), 24,777-24,797.
Luettich, R. A., Westerink, J. J., Scheffner, N. W. 1992. "ADCIRC: an advanced Three-
dimensional Circulation Model for Shelves, Coasts, and Estuaries, Report 1: Theory
and Methodology of ADCIRC-2DDI and ADCIRC-3DL, Technical Report DRP-92-6,
U.S. Army Engineer Waterways Experiment Station, Vicksburg. MS.
Hericks, D. B. and Simpson, D. P. 2000. "Grays Harbor Estuary Physical Dynamics
Study, Final Data Report: September 11, 1999-November 17, 1999," Pacific
International Engineering, Edmonds, WA.
Resio, D. T. 1987. "Shallow-water waves. I: Theory, J. Waterway, Port, Coastal, and
Ocean Engrg., 113(3), 264-281.
Resio, D. T. 1988a. "Shallow-water waves. II: Data comparisons," J. Waterway, Port,
Coasal., and Ocean Engrg., 114(1), 50-65.
Resio, D. T. 1988. "A steady-state model for coastal applications." Proc. 21st Coasal Engrg
Conf., ASCE, 929-940.
Smith, J. M., Resio, D. T., and Zundel, A. K. 1999. "STWAVE: Stead-state spectral wave
model," Report 1, User's Manual for STWAVE Version 2.0, Instruction Report CHL-
99-1, U.S. Army Engineer Waterways Experiment Station, Vicksburg. MS.
Cialone & Kraus
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