1.0 



0.8 



0.6 



0.4 - 



0.2 - 



0.002 0.004 006 0.008 0.010 0.012 0.014 

 H/gT* or H,/gTp 



Figure 8. Wave reflection coefficients and fraction of wave 

 energy dissipated for a 1 on 1.5 smooth slope with 

 no wave transmission (data from Ahrens, 1979). 



■■■■ I o 1 1 



1 



1 





1 





o 



y 



y 

 y ' 



/ 

 / 



■7 



- 



1.0 -Kr (fraction of wave """^ 



1 energy / 



dissipoted) y 



,, y 



o 

 o 



> 



N 



oo 



o 



- 



1 1 



WAVE 

 TYPE 



o Sine 

 X Irregulor 



1 



WAVE 

 STEEPNESS 



H/qT^ 

 Hs/qTp^ 



1 





1 



' 



0.9 

 0.8 

 0.7 

 0.6 

 0.5 

 0.4 

 0.3 

 0.2 

 0.1 



1 1 



— 1 1 r- — 1 T - \— \ 1 1 



Structure Slope = 1 on 1 5 





» "~"'~-^^^^ 





* 



V 







-\ • 



^■^'^^.^^ Structure with no Overtopping 



- 



•\ • 



^'""^'■>v^^^ (Ahrens, 1979) 





. \ 







\ 







• \ 







\ 







\ 





— 



•\ 







\ 







\ 







\ 





— 



\ 









Breokwoter with F = 



\ 





(ds/h=I.O) 







-^.. 





- 



^"■->.^ 8W1 



~ 





^ "^-^.^ 



_ 





^. -*.,- 



Volume of Overtopping Increasing 

 1 1 I 1 1 1 1 1 1 1 1 . 





0.002 



0.004 



0.006 

 H/qT^ 



0.008 



0.012 



Figure 9. Wave reflection coefficients for a breakwater with zero free- 

 board compared to a similar structure with no overtopping. 



23 



