Proceedings of the 32nd International Conference


rubble-mound breakwater
wave attenuation
pore pressures
physical modelling

How to Cite

Vanneste, D. F., & Troch, P. (2011). EXPERIMENTAL RESEARCH ON PORE PRESSURE ATTENUATION IN RUBBLE-MOUND BREAKWATERS. Coastal Engineering Proceedings, 1(32), structures.30. https://doi.org/10.9753/icce.v32.structures.30


The paper describes the pore pressure measurements in a small scale breakwater model performed at Ghent University, Belgium. Two phenomena related to the pore pressure distribution within the breakwater are discussed: the amount of energy dissipation through the armour and filter layer (represented by the 'reference pressure') and the exponential pore pressure attenuation inside the core of the breakwater. The test results are compared with results from literature and with the empirical damping model presented by Burcharth et al. (1999) and Troch (2000). Magnitudes of the reference pressures are found to be strongly dependent on the wave steepness. The pore pressure attenuation obtained from the present experiments shows to be in accordance with the empirical damping model. A suggestion is made for a better prediction of the damping coefficient by eliminating the influence of the wave height in the empirical damping model.


Biesel, F. 1950. "Equations de l'écoulement non lent en milieu permeable. » La Houille Blanche Nr.2, Mars-Avril 1950.

Burcharth, H.F., Christensen, C. 1991. "On stationary and non-stationary porous flow in coarse granular materials." MAST G6-S report, Dept. of Civil Engineering, Aalborg University, Denmark.

Burcharth, H.F., Andersen, O.H. 1995. "On the one-dimensional steady and unsteady porous flow equations." Coastal Engineering, Vol. 24, 233-257, Elsevier.http://dx.doi.org/10.1016/0378-3839(94)00025-S

Burcharth, H.F., Liu, Z., Troch, P., 1999. "Scaling of core material in rubble mound breakwater model tests." Proceedings of the 5th International Conference on Coastal and Port Engineering in Developing Countries (COPEDEC), Cape Town (South Africa), 1518-1528.

Burger, W., Oumeraci, H., Partenscky, H.W. 1988. "Geohydraulic invesigations of rubble mound breakwaters", Proc. 21th International Conference on Coastal Engineering, ASCE, 2242-2256.

CIRIA/CUR 1991 "Manual on the use of rock in coastal and shoreline engineering", CIRIA Publication 83, CUR Report 154.

Helgason, E., Burcharth, H.F., Grune, J. 2004."Pore pressure measurements inside rubble mound breakwaters", Proceedings of 29th International Conference on Coastal Engineering, ASCE, 3701-3713.

Le Mehauté, B. 1957. "Permeabilité des digues en enrochments aux ondes de gravité périodiques. La Houille Blance nr.6, 903-919.

Miche, R. 1960. "Recherches théoriques sur les écoulements de filtration non permanents", 5e Journées de l'Hydraulice, Oumeraci, H., Partenscky, H.W. 1990. "Wave-induced pore pressures in rubble mound breakwaters."

Proceedings of 22th International Conference on Coastal Engineering, ASCE, 1334-1347.

Troch, P. 2000. "Experimental study and numerical simulation of wave interaction with rubble mound breakwaters.", PhD Thesis, Dept. of Civil Engineering, Ghent University, Belgium., 5-25.

Troch, P., De Rouck, J., Burcharth, H.F. 2002. "Experimental study and numerical modeling of wave induced pore pressure attenuation inside a rubble mound breakwater", Proc. 28th International Conference on Coastal Engineering, ASCE, 1607-1619

van Gent, M.R.A. 1995. "Wave interaction with permeable coastal structures", PhD Thesis, TU Delft, The Netherlands.

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.