Incident, reflected, and transmitted wave heights (Hj, H^, Hy) are defined 

 as 



(1) 



"l = 



All 2 



Hi? = 



kn 2 



(2) 



/411 

 H = 2 / S (a );. C3) 



V j=12 ^ 



where Hj is the height of the wave moving landward toward the breakwater, 

 H^ the height of the wave reflecting from the breakwater and moving seaward, 

 and Hy the height of the wave transmitted past and in the lea of the 

 breakwater. 



Wave reflection and transmission coefficients, K^ and Ky, are defined as 



K = 



R Wj- 



A (4) 



and 



Wave transmission by overtopping has a transmission coefficient defined as 

 Ky^ ; wave transmission through porous structures is given by a transmission 

 coefficient Y^Tt- The coefficient for total wave transmission over and through 

 a structure, Ky, is 



/ 



4^ + 4^ (6) 



In the case of irregular waves the significant wave height, Hg (average 

 of the highest one-third of the waves) , is typically used to describe the wave 

 conditions. To include the effects of wave reflection from the structure, 

 significant height is defined as (Goda and Suzuki, 1976) 



4 n 



(7) 



jn 



16 



R 



