CONTENTS 



FIGURES- -Continued 



Page 



35 Observed and predicted transmission coefficients for a breakwater 



with doles armor units 47 



36 Wave transmission past a heavily overtopped breakwater with tribar 



armor units 48 



37 Observed and predicted transmission coefficients for BW16 49 



38 Example of the influence of porosity on the predicted coefficient of 



transmission for a rubble-mound breakwater 51 



39 The relative importance of transmission by overtopping as a function 



of the incident wave height and the water depth-to-structure 



height ratio 51 



40 Observed and predicted transmission coefficients for submerged 



permeable structures assuming Kyy. = 52 



41 Percent of wave energy at the forcing period for waves transmitted 



past a permeable breakwater 53 



42 Sample incident, reflected, and transmitted wave spectra for BW16. . . 54 



43 Spectral peakedness of transmitted and reflected wave spectra versus 



incident spectral peakedness for a permeable breakwater 54 



44 Comparison between incident and transmitted wave height distribution 



for a permeable breakwater 55 



45 Autocorrelation of zero up-crossing wave heights for transmitted and 



incident wave records for a permeable breakwater 57 



46 Sample joint distributions of wave height and period for an 



irregular wave condition and a permeable breakwater 57 



47 Trapezoidal multilayered breakwater tested by Sollitt and Cross 



(1976) 59 



48 Physical model results and correction factors determined from the 



analytical model of Madsen and White (1976) 59 



49 Breakwater cross sections used in the example for estimating wave 



transmission coefficients 60 



50 Predicted wave transmission coefficients 61 



51 Predicted transmitted wave height as a function of breakwater crest 



height 61 



