SEEPAGE FLOW IN A BREAKER ZONE
Proceedings of the 32nd International Conference
PDF

Keywords

seepage flow
pore water pressure
bar
permeable beach
breaker zone

How to Cite

Kakinuma, T., Ohishi, S., & Nakamura, K. (2011). SEEPAGE FLOW IN A BREAKER ZONE. Coastal Engineering Proceedings, 1(32), currents.54. https://doi.org/10.9753/icce.v32.currents.54

Abstract

Seepage velocities in several breaker zones were measured with dye for visualization. Pressure gauges were also installed to obtain pore water pressure. Three cases of different incident-wave periods were treated in laboratory experiments. The time-averaged pore water pressure was higher near the shoreline, resulting in the seepage flow, the maximum velocity of which was larger as the incident-wave period was longer, generally moving from onshore to offshore. The penetrated water flowed out from the permeable seabed at a bar top or on the rather offshore side of the bar top if a bar was developed remarkably. The pore water pressure in the breaker zone showed time variation depending on the wave phases including wave breaking and bore propagation. There was a phase when the pore water pressure was locally low below the bar.
https://doi.org/10.9753/icce.v32.currents.54
PDF

References

Cheong, C., H. Kang, S. Park, D. Ra, and M. Okada. 2002. Penetration of spilled fuel oil C and its influence on the seawater infiltration into sandy beach sediments, Environ. Eng. Res., 7, 169-175. http://dx.doi.org/10.4491/eer.2002.7.3.169

Inouchi, K., Y. Kishi, and T. Kakinuma. 1990. The motion of coastal groundwater in response to the tide, J. Hydrol., 115, 165-191. http://dx.doi.org/10.1016/0022-1694(90)90203-A

Kudella, M. and H. Oumeraci. 2006. Development of residual pore pressure in the sand bed beneath a caisson breakwater, Proceedings of 30 th International Conference on Coastal Engineering, ASCE, 4554-4566.

Ma, H., N. Mizutani, S. Eguchi, and D. Hur. 2004. Study on beach profile change and wave induced velocity field in permeable beach, Annual Journal of Civil Engineering in the Ocean, JSCE, 20, 509-514. (in Japanese) http://dx.doi.org/10.2208/prooe.20.509

Mutsuda, H., Y. Doi, S. Morikawa, and R. Miake. 2001. Relationship between wave induced percolation mechanism and breaker types in the surf zone, Journal of Coastal Engineering, JSCE, 48, 1206-1210. (in Japanese) http://dx.doi.org/10.2208/proce1989.48.1206

Precht, E. and M. Huettel. 2004. Rapid wave driven advective pore water exchange in a permeable coastal sediment, J. Sea Res., 51, 93-107.http://dx.doi.org/10.1016/j.seares.2003.07.003

Authors retain copyright and grant the Proceedings right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this Proceedings.