SOLUTION : The wave height must be converted to a deepwater value. 

 Using the depth where wave height was measured, calculate 



d d d 10 



L gT 2 /27r 9.8 T 2 /2it 1.56(8) 2 



7- = 0.1002 . 



L o 



To determine the shoaling coefficient, H/HA, equation (2) can be 

 used with d = 10.0 meters together with the wavelength determined 

 from equation (1). Alternatively, Table C-l in the SPM may be used. 

 For 



j- = 0.1002 , 

 Sr« 0.9325 ; 



therefore, 



HA = 



H 2.5 



0.9325 0.9325 



Calculate, also, 



# = OTiF* - 00427 ' 



and, for d„ = 7.5 meters., 



7.5 

 2.68 



2.8 



The bottom slope is very gentle (1 on 90). Assuming that the slope 

 approximates a horizontal bottom, the appropriate set of curves for 

 d s /HA = 2.8 is in Figure 14 (for d s /HA = 3.0). For a 1 on 3 

 structure slope and 



-—■ = 0.00427, — = 2.0 

 gT 2 H' 



53 



