10^ 













































— Sand Size (mm) 



H 0.2 ? Komar, 1969 (El Moreno) 



0.6 \7 Komar, 1969 (Silver Stran 



0.4 o Caldwell, 1956 

 _ 0.4 • Watts, 1953 



Significant Height is used in 



Computing P^g 









y 











7 











^^ - 





d) 







7 









/ 





6 



/ 



/■ 































/ 

































/ 

































r 

































/ o 































/ 

































/^ 































i 



T^ 





























/ 







o 









5 















A 



c 



> 





-Q 



1 III 

 = (7.5 X 10^) P^s 

















♦* 

































r / 

































K 

































/. 































y 































A 



/ 





























/ 





^ \ 



1 























• .' 



/ 



• 

























4 



/ 



/ 



1 





























Longshore Energy Flux Factor, P^g, Ft-lb /s/ft of beach front 



Figure 2. Design curve for longshore transport rate versus energy flux 

 factor; only field data are included (from U.S. Army, Corps 

 of Engineers, Coastal Engineering Research Center, 1977). 



Table 2. Approximate formulas for computing longshore energy 

 flux factor, ^iq, entering the surf zone. 



Equation 



(ft-lb/s/ft of beach front) 



Data required 

 (ft-s units) 



(9) 

 (10) 

 (11) 

 (12) 



32.1 H|/2 sin 2a^ 



18.3 h|/^ (cos ct^)^/'' sin 2a^ 



20.5 TH^ sin a, cos a 



so b o 



100.6 (H|j/T) sin a^ 



T, H , a , a, 

 ' so' o' h 



T, %h' ^o 



NOTE . --Subscript h = breaker value; a = deepwater value; 

 and s = significant wave height. 



