U = 30m/s 



GO 

 O 



o 



o 



a 



lOm/s 



0.2 



0.3 



0.4 



Peak Frequency , fp (Hz) 



Figure 5. Plot of R = (a/0.0081) ^/^ as function of peak frequency 

 of spectrum and windspeed U. Data based on JONSWAP wind 

 sea relationships (Hasselmann, et al. , 1973). Coefficient 

 R is used to adjust curves in Figure 4 to account for 

 variation in a. 



17 



