can be made using the program MADSEN with dg/h =1.0. As a lower estimate, 

 Ky^ = 0.0 can be assumed. Laboratory results from BW13, BW15, BW15W, and 

 BW16 show that even using Ky^ = 0. methods in Section IV,l,b tend to give 

 conservative estimates of the transmission coefficient for submerged permeable 

 breakwaters (Fig. 40). 



1.0 



0.8- 



0.6 



0.4 - 



0.2 



1 — 



1 1 1 1 



1 ' 1 

















t 



00 / 

 / 









, 0, 



/ 



- 



t 



t 







- 



- 





oso 



- 



- 



y 



• Sine Waves 





/ 



« Irregu 



ar Waves ~ 



^ 1 



BW I3,I5,I5W 

 1 



1 1 



0.4 0.6 



Kj (observed) 



Figure 40. Observed and predicted transmission coefficients 



for submerged permeable structures assuming Ky^ = 0. 



52 



