program. Table 4-6 shows the deepwater wave directions, the correspond- 

 ing shallow-water directions, the actual wave generator directions used 

 in the tests, and the wave periods and wave heights selected for the 

 various wave directions. The procedures to evaluate the various plans 

 tested included: (a) comparison of average maximum wave heights recorded 

 at selected locations in the main channel and individual basins, (b) ex- 

 tension of these data into tables of estimated durations of wave heights 

 at the selected locations, and (c) visual observations. Data were ob- 

 tained for base test (existing) conditions and with various improvement 

 plans installed in the model. Wave height data were adjusted to compen- 

 sate for the greater rate of wave height attenuation in the model, as 

 compared with the prototype, by the application of Keulegan's (1950b) 

 equation. In recording wave heights in the individual basins in the 

 model, two gages were positioned along each sidewall (Fig. 4-15) and 

 were moved along the middle one-third of the wall length as necessary 

 to coincide with the loop points of the standing wave patterns. This 

 technique ensured that the maximum wave heights in the area of each 

 gage would be recorded. In the analysis of test results, the maximum 

 sustained wave heights recorded at each gage location (main channel and 

 individual basins) were selected for the computations which, in effect, 

 resulted in conservative results from the analysis. In the case of the 

 main channel gages, the maximum wave heights for each gage were averaged 

 from three or more similar tests; for the basins, the wave height data 

 utilized were the averages of the maximum wave heights recorded at the 

 four gages in each basin. 



Table 4-6. Selected test wave conditions, Marina del Rey model. 







Wave conditions 



Shallow-water test waves 



Pyirprf ir\n 









(prototype 



dimensions) 



J-ZU CL-UlOll 



Deep water 



Shallow water 



Wave machine 



Period 



(s) 



Height 



(ft) 



W.N.W. 



292°30' 



267°15' 



264°19' 



8 



13 



W.N.W. 



292° 30' 



267°15' 



264°19' 



12 



9 



W.N.W. 



292°30' 



267°15' 



264°19' 



16 



9 



W. 



270°00' 



258°30' 



255°19' 



8 



11 



W. 



270°00' 



258°30' 



255°19' 



12 



9 



W. 



270°00' 



258°30' 



255°19' 



16 



9 



W.S.W. 



247°30' 



243° 15' 



240°19'J 



8 



9 



W.S.W. 



247°30' 



243°15' 



240°19'' 



12 



8 



W.S.W. 



247°30' 



243°15' 



240°19'' 



16 



9 



S.W. 



225°00' 



228°40' 



225°19' 



12 



8 



S.W. 



225°00' 



228°40' 



225°19' 



16 



8 



s.s.w. 



202°30' 



210°45' 



210°19' 



8 



8 



s.s.w. 



202°30' 



210°45' 



210° 19' 



12 



8 



s.s.w. 



202°30' 



210°45' 



210°19' 



16 



8 



Azimuth of centerline of entrance to the main channel. 



247 



