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

D. M. R. Sampath | Zendy; J. J. Wijetunge | Zendy

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

Author(s) -

D. M. R. Sampath,

J. J. Wijetunge

Publication year - 2006

Publication title -

engineer journal of the institution of engineers sri lanka

Language(s) - English

Resource type - Journals

eISSN - 2550-3219

pISSN - 1800-1122

DOI - 10.4038/engineer.v39i1.7174

Subject(s) - rubble , sluice , breakwater , engineering , civil engineering , section (typography) , geotechnical engineering , geology , mining engineering , archaeology , computer science , geography , operating system

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.

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