1.6 r 



> 0.8 - 



PLANE BEACH 



DEEP-WATER WAVE HEIGHT = 10 FT 



WAVE PERIOD = 12 SEC 



ANGLE OF INCIDENCE = 20 DEG 



J I L_l 



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 



TIME, MIN 

 Figure 14. Longshore velocity, WES calculations 



3.0 

 2.5 

 2.0 



NUMERICAL SOLUTION 

 EXPERIMENTAL DATA 

 OF BOWEN. ET AL. 



1.5 g 

 u 



1.0 

 0.5 

 

 •J -0.5 



400 



300 



200 



100 



DISTANCE FROM STILL-WATER LINE 

 IN BEACH, x CMS 



Figure 15. Comparison of numerical solution for 

 setup with experimental data 



neglected in the calculations to allow comparisons with an analytical solution 

 of Longuet-Higgins (1970). Using a 100 by 6 uniform grid with Ax = Ay = 

 60 ft, and a time-step of 0.5 sec, a steady-state longshore velocity distri- 

 bution was obtained after a time of 800 At . Next, the same case was rerun 



38 



