Oblique Reflection Characteristics of Rubble-Mound Structures
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 122, Issue 1
Abstract
An experimental investigation of the reflection of obliquely incident waves from a model rubble-mound breakwater is described. In regular wave tests, the wave height, wave period, and angle of incidence were varied in order to determine relationships between the reflection characteristics and parameters describing the incident waves. For these tests, a least-squares fit to measurements from three wave probes was used to estimate the reflection coefficient and the phase angle of the reflected wave train. Results show that both the reflection coefficient and the reflected phase lag are noticeably dependent on the angle of incidence and that the variation with angle of incidence further depends on the depth to wavelength ratio. Reflection coefficients estimated from the analysis of irregular wave tests are also presented and are compared to reflection coefficients measured in regular wave tests, showing good agreement. For one test with multi-directional waves, directional spectra of the incident and reflected wave fields were obtained using a maximum likelihood fit to measurements from five wave probes, and these indicate increased directional spreading of the reflected wave field relative of that of the incident wave field.
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References
1.
Allsop, N. W. H., and Heittiarachchi, S. S. L. (1988). “Reflections from coastal structures.”Proc., 21st Coast. Engrg. Conf., ASCE, New York, N.Y., 782–794.
2.
Benoit, M., and Teisson, C. (1994). “Laboratory study of breakwater reflection—effect of wave obliquity, wave steepness and mound slope.”Proc., Int. Symp.: Waves-Physical and Numerical Modelling, University of British Columbia, Vancouver, Canada, 1021–1030.
3.
Goda, Y., and Abe, Y.(1968). “Apparent coefficient of partial reflection of finite amplitude waves.”Rep., Port and Harb. Res. Inst., Yokosuka, Japan, 7(3), 3–58.
4.
Goda, Y., and Suzuki, Y. (1976). “Estimation of incident and reflected waves in random wave experiments.”Proc., 15th Coast. Engrg. Conf., ASCE, New York, N.Y., 828–845.
5.
Isaacson, M.(1991). “Measurement of regular wave reflection.”J. Wtrwy., Port, Coast. and Oc. Engrg., ASCE, 117(6), 553–569.
6.
Isaacson, M., O'Sullivan, E., and Baldwin, J.(1993). “Reflection effects on wave field within a harbour.”Can. J. Civ. Engrg., 20(3), 386–397.
7.
Jamieson, W. W., and Mansard, E. P. D. (1987). “An efficient upright wave absorber.”Proc., ASCE Spec. Conf. on Coast. Hydrodynamics, ASCE, New York, N.Y., 124–139.
8.
Kobayashi, N., Cox, D. T., and Wurjanto, A.(1990). “Irregular wave reflection and run-up on rough impermeable slopes.”J. Wtrwy., Port, Coast., and Oc. Engrg., ASCE, 116(6), 708–726.
9.
Losada, M. A.(1990). “Recent developments in the design of mound breakwaters.”Handbook of Coastal and Ocean Engineering, John Herbich, ed., Gulf Publishing, Houston, Tex., 1, 939–1050.
10.
Mansard, E. P. D., and Funke, E. R. (1980). “The measurement of incident and reflected wave spectra using a least squares method.”Proc., 17th Coast. Engrg. Conf., ASCE, New York, N.Y., 154–172.
11.
Mansard, E. P. D., Sand, S. E., and Funke, E. R. (1985). “Reflection analysis of non-linear regular waves.”Tech. Rep. No. TR-HY-011, Hydr. Lab., Nat. Res. Council of Canada, Ottawa, Canada.
12.
Nwogu, O. (1989). “Analysis of fixed and floating structures in random multi-directional waves,” PhD thesis, University of British Columbia, Vancouver, Canada.
13.
Papps, D. A. (1992). “Oblique wave reflection from a model rubble-mound breakwater,” M.A.Sc. thesis, University of British Columbia, Vancouver, Canada.
14.
Seelig, W. N. (1983). “Wave reflection from coastal structures.”Proc., Inst. Conf. on Coast. Struct., ASCE, New York, N.Y., 961–973.
15.
Seelig, W. N., and Ahrens, J. P. (1981). “Estimation of wave reflection and energy dissipation coefficients for beaches, revetments, and breakwaters.”Rep. No. TP 81-1, Coast. Engrg. Res. Ctr., U.S. Army Engr. Wtrwys. Experiment Station, Vicksburg, Miss.
16.
Shore Protection Manual. (1984). U.S. Army Corps of Engineers, Coast. Engrg. Res. Ctr., U.S. Army Engr. Wtrwys. Experiment Station, Vicksburg, Miss.
17.
Tautenhain, E., Kohlhase, S., and Partenscky, H. W. (1982). “Wave run-up at sea dikes under oblique wave approach.”Proc., 18th Coast. Engrg. Conf., ASCE, New York, N.Y., 804–810.
18.
Thornton, E. B., and Calhoun, R. J.(1972). “Spectral resolution of breakwater reflected waves.”J. Wtrwy., Port, Coast., and Oc. Engrg., ASCE, 98(4), 443–460.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 122 • Issue 1 • January 1996
Pages: 1 - 7
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Jan 1, 1996
Published in print: Jan 1996
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