> 
Ib 
: 
Peak spectral wave period distributions. Annual, seasonal, and 
monthly peak wave period distribution bar charts for 1982 are pre- 
sented in Figures B5, B6, B18, B26, and B34; data for 1980 through 
1982 are in Figures B11, B21, B29, and B37. 
Persistence of wave heights. Tables B5, B13, B21, and B29 show the 
number of times throughout 1982 when the specified wave height was 
equaled or exceeded at least once during each day for the duration 
(consecutive days) indicated; data for 1980 through 1982 are in 
Tables B9, B17, B25, and B33. For example, for gage 625 (Table B5) 
wave heights equaled or exceeded 1.0 m 54 times for at least 1 day; 
34 times for at least 2 days; 26 times for at least 3 days; 17 times 
for at least 4 days; etc. Therefore, on 20 occasions one would 
expect the height to have equaled or exceeded 1.0 m for 1 day 
exactly; on 8 occasions for 2 days; on 9 occasions 3 days; etc. 
Note that the height exceeded 1 m 54 times for 1 day or longer, 
while heights exceeded 0.5 m only 18 times for this same duration. 
This occurred because the longer durations of lower waves may be 
interspersed with shorter, but more frequent, intervals of higher 
waves. For example, the one time that wave heights exceeded 0.5 m 
for 109 days may represent 5 or 10 times the height exceeded 1 m. 
Wave roses. For gage 625 (pier-end Baylor), wave roses showing the 
distribution of wave height versus approach angle are presented. 
1982 data are in Figures B7 and B8, while 1980 through 1982 data are 
in Figures B12 and B13. The angles are referenced to true North. 
Northerly wave angles (less than 70 deg) generally produce southward 
currents, while southerly wave angles (greater than 70 deg) produce 
northward currents. 
Spectra. Spectra for gage 625 (pier-end Baylor) for days when wave 
heights exceeded 2 m are presented in Figure B38. The plots show 
energy density as a function of wave frequency for all available 
times throughout the day. 
B2 
