Wave Propagation in Jettied Entrance Channels. II: Observations
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 117, Issue 5
Abstract
Field measurements of surface gravity waves along the center line of the straight, 1 km long, 8 m deep, 250 m wide Mission Bay entrance channel (bounded by rubble‐mound jetties) are compared to a model developed in a companion paper by Melo and Guza. The observations show a rapid downchannel decay of wave energy. Additionally, the observed ratio of significant wave heights between any two stations along the channel axis is rather constant despite the different wave and current conditions encountered. The model, with all empirical coefficients determined with existing parameterizations, agrees qualitatively well with these observations. These model results are insensitive to the details of the motions and dissipation occurring within the jetties so long as an appropriate amount of energy is lost at these lateral boundaries. The wave height on the center line of a wide channel with highly absorptive jetties is controlled by diffraction. In fact, the observations and model results on the center line at Mission Bay are similar to previously published simplified models with the jetties replaced by strips of appropriate bottom dissipation and also to the decay along the center line of a breakwater gap with the gap width equal to the entrance channel width.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Booij, N. (1981). “Gravity waves on water with non‐uniform depth and current,” thesis presented to the Technical University of Delft, at Delft, The Netherlands, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
2.
Dalrymple, R. A., Kirby, J. T., and Hwang, P. A. (1984). “Wave diffraction due to areas of energy dissipation.” J. Wtrwy. Port, Coast., and Oc. Engrg., ASCE, 110(1), 67–79.
3.
Grant, W. D., and Madsen, O. S. (1979). “Combined wave and current interaction with a rough bottom.” J. Geophysical Res., 84, 1797–1808.
4.
Hasselmann, K., and Collins, J. I. (1968). “Spectral dissipation of finite‐depth gravity waves due to turbulent bottom friction.” J. Marine Res., 26(1), 1–12.
5.
Herron, W. J., Jr. (1972). “Case history of Mission Bay inlet, San Diego, California.” Proc., 13th Coastal Engrg. Conf., ASCE, New York, N.Y., 801–821.
6.
Kamphuis, J. W. (1978). “Attenuation of gravity waves by bottom friction.” Coastal Engrg., 2, 111–118.
7.
Kirby, J. T. (1986). “Higher‐order approximations in the parabolic equation method for water waves.” J. Geophysical Res., 91(C1), 933–952.
8.
Liu, P. L.‐F., Yoon, S. B., and Dalrymple, R. A. (1986). “Wave reflection from energy dissipation region.” J. Wtrwy., Port, Coast., and Oc. Engrg., 112(6), 632–644.
9.
Madsen, O. S. (1976). “Wave climate of the continental margin: Elements of its mathematical description.” Marine sediment transport and environmental management, D. J. Stanley and D. J. P. Swift, eds., John Wiley and Sons, New York, N.Y.
10.
Madsen, O. S., Poon, Y., and Graber, H. (1988). “Spectral wave attenuation by bottom friction: Theory.” Proc., 21st Coastal Engrg. Conf., 492–504.
11.
Madsen, O. S., and White, S. M. (1976a). “Reflection and transmission characteristics of porous rubble‐mound breakwaters.” Miscellaneous Report No. 76–5, U.S. Army, Coastal Engrg. Res. Ctr., Ft. Belvoir, Va.
12.
Madsen, O. S., White, S. M. (1976b). “Energy dissipation on a rough slope.” J. Wtrwy., Harb., and Coast. Engrg. Div., ASCE, 102(1), 31–48.
13.
Madsen, O. S., and White, S. M. (1976c). “Wave transmission through trapezoidal breakwaters.” Proc., 15th Coastal Engrg. Conf., ASCE, New York, N.Y., 2662–2676.
14.
Madsen, P. A. (1983). “Wave reflection from a vertical permeable wave absorber.” Coastal Engrg., 7, 381–396.
15.
Melo, E., and Guza, R. T. (1990). “Wave propagation in a jettied entrance channel.” SIO Reference Series 90–1, Scripps Instn. of Oceanography, La Jolla, Calif.
16.
Melo, E., and Guza, R. T. (1991). “Wave propagation in jettied entrance channels. I: Models.” J. Wtrwy., Port, Coast., and Oc. Engrg., ASCE, 117(5), 471–492.
17.
Pawka, S. S., and Guza, R. T. (1983). “Coast of California waves study—site selection.” SIO Ref. 83–12, Scripps Instn. of Oceanography, La Jolla, Calif.
18.
Penney, W. G., and Price, A. T. (1952). “Part I. The diffraction theory of sea waves and the shelter afforded by breakwaters.” Phil. Trans. Royal Society, Royal Society of London, London, England, A244(882), 236–253.
Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 117 • Issue 5 • September 1991
Pages: 493 - 510
Copyright
Copyright © 1991 ASCE.
History
Published online: Sep 1, 1991
Published in print: Sep 1991
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.