80-84 

 85 



1.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 12.0 14.0 16.0 

 PERIOD, s 



Figure 20. Comparison of annual wave period distributions for 



Gage 625 



All years 



54. The 6 years of data from 1980 through 1985 provide the most com- 

 plete description of the wave climate at the FRF. Annual wave height distri- 

 butions for all of the gages are presented in Figure 21. Gage 640 is a new 

 installation this year. It is located at approximately the seaward extent of 

 the breaker zone. Only 1 year of data is available from it, however. Off- 

 shore at Gage 630, heights can be expected to exceed 2 m over 8 percent of the 

 time, 3 m about 1.2 percent of the time, and to occasionally exceed 4 m. At 

 the seaward end of the pier (Gage 625) , heights can be expected to exceed 2 m 

 about 5.7 percent of the time and 3 m less than 1 percent. Seasonal height 

 variation is summarized by examining data for Gage 625. Mean seasonal heights 

 are near 1 m during the winter and autumn and near 0.7m during spring and 

 summer (Figure 22) . During January through March and October through December 

 heights can be expected to exceed 3 m approximately 1 percent of the time. 

 During April through June the heights exceed 2 m approximately 1.2 percent of 

 the time, while during July through September they exceed the same height over 

 2.1 percent (Figure 23). 



55. Seasonal wave period variation for all years of data combined are 



40 



