SYMBOLS AND DEFINITIONS--Continued 

 reflection coefficient 



/ 2 2 



Ky transmission coefficient = VKy^ + Ky^ 



Ky^ wave transmission by overtopping coefficient 



Ky^ coefficient of wave transmission through a permeable breakwater 



k wave number = 2tt/L 



L wavelength 



Lq deepwater wavelength 



P material porosity 



p probability 



Qp spectral -peakedness parameter 



Qp^ incident spectral-peakedness parameter 



Qpy, reflected spectral-peakedness parameter 



Qp^ transmitted spectral-peakedness parameter 



R wave runup 



r(H,H + 1) autocorrelation of wave heights 



r(H,T) correlation of wave heights and periods 



T wave period 



Tp period of peak energy density 



WjQ median weight of material 



Y specific weight 

 Af band width 



A£ gage spacing 



^rms root-mean-square water level 



e angle of seaward face of a breakwater 



V kinematic viscosity of water 



5 surf parameter = (tan 0/ Vh/T^) 



p autocorrelation of zero up-crossing wave heights 



• for incident waves 



• for transmitted waves 



10 



