Table 4-9. Longshore energy flux, P , 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-amplitude 

 theory is valid. 



Table 4-10. Approximate formulas for computing longshore energy flux 



See Table 4-9 for equivalent small-amplitude equations and Table 4-11 for 

 assumptions used in deriving P from P. . 



Subscript b = breaker value, o = deepwater value, and s = signifi- 

 cant wave height. 



C = group velocity (see assumption lb. Table 4-11) 



C = deepwater wave velocity 



d = water depth 



H = significant wave height 



T = wave period 



a = angle between wave crest and shoreline 



/cos a 



V — - 



^ 



= refraction coefficient 



cos a 



4-94 



