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Section I

How Significant is the Wave Run-Up Reduction due to Underlayer Permeability in the Design of Rubble-Mound Breakwaters?

Authors:

D. M. R. Sampath ,

University of Peradeniya, LK
About D. M. R.

Lecturer (temp.), Department of Civil Engineering

 AMIE (SL). BSc Eng (Hons) (Peradeniya). MSc. Eng (Peradeniya)

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J. J. Wijetunge

University of Peradeniya, LK
About J. J.

Senior Lecturer. Department of Civil Engineering

AMIE (SL), BSc Eng (Hons) (Moratuwa). PhD (Cambridge)

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Abstract

The present paper is concerned with an experimental investigation designed to quantify the influence of the permeability of underlayers (filter and core) on the wave run-up over rubble-mound slopes. The run-up measurements were carried out in a laboratory wave channel over a practically useful range of the surf similarity parameter over different structure configurations representing a range of the notional permeability factor (P). The results appear to suggest that the run-up reduction due to underlayer permeability is little, 2% and 5%, respectively, for values of P=0.1 and 0.4; however, the run-up reduction for structures with P = 0.5 and 0.6 is not insignificant, viz., 10% and 15%, respectively.
How to Cite: Sampath, D.M.R. & Wijetunge, J.J., (2006). How Significant is the Wave Run-Up Reduction due to Underlayer Permeability in the Design of Rubble-Mound Breakwaters?. Engineer: Journal of the Institution of Engineers, Sri Lanka. 39(1), pp.13–18. DOI: http://doi.org/10.4038/engineer.v39i1.7174
Published on 24 Jan 2006.
Peer Reviewed

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