Design formulas of transmission coefficients for permeable breakwaters |
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| Authors: | Su-xiang ZHANG ;Xi LI |
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| Affiliation: | [1]Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, P. R. China; [2]Department of Civil Engineering and Applied Mechanics, McGill University, Montreal Quebec H3A 2K6, Canada; [3]College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, P. R. China |
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| Abstract: | New empirical formulas of the transmission coefficient for permeable breakwaters were suggested based on available experimental data regarding the low-crest structure (LCS), including the permeable rubble mound breakwater and pile-type breakwater. The rationality of the present formulas was verified by their comparison with existing empirical and analytical formulas. Numerical flume results were obtained by solving the modified Boussinessq-type wave equations (MBEs), and a new expression relating the friction coefficient α to the relative submerged depth Rt/Hs was also derived. Comparative analysis shows that the results of the present formulas agree with the numerical flume results as well as available experimental data, and the present formulas are superior to the existing empirical and analytical expressions in estimating the transmission coefficient. The present formulas can provide references for estimation of the transmission coefficient in engineering practice. |
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| Keywords: | permeable breakwater transmission coefficient wave reflection nonlinear wave Boussinesq wave model low-crest structure |
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