Shoreline Changes behind Detached Breakwater
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 126, Issue 2
Abstract
A series of experiments were conducted to study shoreline changes caused by the presence of a detached breakwater under the influence of pure wave action. The breakwater length, B, and its distance from the initial shoreline, X, were the two main parameters investigated. The study analyzes the effect of these two factors on shoreline changes. The experimental data show that (1) the size of a salient, Xs, increases with B, but decreases with X; and (2) the deposition area of the salient, A, increases with both B and X for X ≤ B. However, further increase in X (X > B) will lead to a reduction in A. Based on the experimental results, the study proposes a criterion to demarcate the formation of a tombolo from that of a salient. The data also show that the width of the tombolo is directly proportional to B and inversely proportional to X. Finally, a new relationship for estimating the sand deposition area is obtained, and published data from the literature are used to verify the new relationship.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Dally, W. R., and Pope, J. (1986). “Detached breakwaters for shore protection.” Tech. Rep. CERC-86-1, U.S. Army Engineers Waterways Experiment Station, Vicksburg, Miss.
2.
Gourlay, M. R. (1981). “Beach processes in the vicinity of offshore breakwaters.” Proc., 5th Australian Conf. on Coast. and Oc. Engrg., Institution of Engineers, Australia, 129–134.
3.
Handbook of offshore breakwater design. (1986). River Bureau of the Japanese Ministry of Construction, Tokyo.
4.
Harris, M. M., and Herbich, J. B. (1986). “Effects of breakwater spacing on sand entrapment.”J. Hydr. Res., 24(5), 347–357.
5.
Hsu, J. R. C., and Silvester, R. (1990). “Accretion behind single offshore breakwater.”J. Wtrwy., Port, Coast., and Oc. Engrg., ASCE, 116(3), 362–380.
6.
Mimura, N., Shimizu, T., and Horikawa, K. (1983). “Laboratory study on the influence of detached breakwater on coastal change.” Proc., Coast. Struct. '83, ASCE, Reston, Va., 740–752.
7.
Ming, D. H. ( 1997). “Modeling of sediment transport in the presence of breakwaters,” PhD thesis, Nanyang Technological University, Singapore.
8.
Nir, J. (1982). “Offshore artificial structures and their influence on the Israel and Sinai Mediterranean beaches.” Proc., 18th Conf. on Coast. Engrg., ASCE, Reston, Va., 1837–1856.
9.
Rosati, J. D., and Truitt, C. L. ( 1990). “An alternative design approach for detached breakwater projects.” Miscellaneous Paper CERC-90-7, U.S. Army Corps of Engineers Coastal Engineering Research Center.
10.
Rosen, D. D., and Vajda, M. (1982). “Sedimentological influences of detached breakwaters.” Proc., 18th Int. Conf. on Coast. Engrg., ASCE, Reston, Va., 1, 1930–1949.
11.
Shinohara, K., and Tsubaki, T. (1966). “Model study on the change of shoreline of sandy beach by the offshore breakwater.” Proc., 10th Int. Coast. Engrg. Conf., 551–563.
12.
Shore protection manual, 4th Ed. (1984). U.S. Army Engineers Waterways Experiment Station, Coastal Engineering Research Center, U.S. Government Printing Office, Washington, D.C.
13.
Suh, K., and Dalrymple, R. A. (1987). “Offshore breakwaters in laboratory and field.”J. Wtrwy., Port, Coast., and Oc. Engrg., ASCE, 113(2), 105–121.
Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 126 • Issue 2 • March 2000
Pages: 63 - 70
History
Received: Aug 5, 1998
Published online: Mar 1, 2000
Published in print: Mar 2000
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.