Table 4-7. Longshore Energy Flux.Pg , for a Single Periodic Wave in 

 Any Specified Depth. (Four Equivalent Expressions from 

 Small-Amplitude Theory) 



no subscript indicates a variable at the specified depth 



where small-ampUtude theory is valid 

 Cg = group velocity (see assumption lb, Table 4-9) 

 C^ = deepwater 



d = water depth 



H = significant wave height 



T = wave period 



a = angle between wave crest and shoreline 



K^ — refraction coefficient 



/ cos Ug ' 



\ cos a 



Table 4-8. Approximate Formulas for Computing Longshore 

 Energy Flux Factor, Pp , Entering the Surf Zone 



H^ = deepwater 



Hy = breaker position 



H = significant wave height 



T = wave period 



a = angle between wave crest and shoreline 



See Table 4-7 for equivalent small amplitude equations and 

 Table 4-9 for assumptions used in deriving Pj from Pp. 



4-97 



