conditions to determine if installation of the plan would cause any sig- 

 nificant changes in the modes of oscillation in the model bay area. 

 Measurements were made over a horizontal grid system, and contours of 

 equal wave heights were drawn so that the various loop and node points 

 could be distinguished. These tests used prototype wave periods of 35, 

 45, 55, 120, 130, 170, 180, 200, 230, and 255 seconds. Wave heights and 

 surface currents were measured in the harbor basins and entrances for 

 base test, plan 1, and plan 2 over the entire range of wave periods from 

 35 to 360 seconds. During each test where surface currents were measured, 

 several hundred surface floats (approximately 1 inch square and 1/8 inch 

 thick) were distributed throughout the harbor area, and time-exposure 

 photos were taken of current movement over one wave cycle (one wave 

 period). Frequency response tests were conducted to determine if any 

 of the harbor basins responded to specific wave periods. In these tests, 

 comprehensive wave height measurements were made in each of the basins 

 for the entire range of wave periods (35 to 360 seconds). Time-exposure 

 photos were also used to determine the degree of response of the harbor 

 basins for the various wave periods. Short-period wave tests were con- 

 ducted with base test conditions and plans 1 and 2 installed in the 

 model for the entire range of test waves listed in Table 4-9. Wave 

 height measurements were made in all of the harbor basins and basin 

 entrances. 



(k) Summary of Test Results . 



j^ The modes of oscillation in the bay area for base 

 test conditions and with the proposed plan 1 installed were generally 

 similar; the wave input into the harbor was reproduced with sufficient 

 accuracy. 



2^ Intermediate- and long-period wave and current con- 

 ditions in the harbor were approximately the same for either plan 1 or 

 plan 2, and either plan offered a slight improvement over conditions in 

 the existing harbor. 



3 Intermediate- and long-period wave and current con- 

 ditions in the newly formed basins of plans 1 and 2 compared favorably 

 with those in the existing marina, indicating that, to the extent that 

 present conditions in the existing marina are considered acceptable, con- 

 ditions in the proposed additional basins were also satisfactory. 



4 The harbor basins responded to some extent to several 

 of the intermediate- and long-period waves tested; however, no serious 

 resonance was noted. 



_5 For short-period wave heights, both plans (1 and 2) 

 offered an improvement over existing conditions and neither plan appeared 

 significantly better than the other. 



6^ Short -period wave heights in the marina, west basin, 

 midbasin, and mooring area I of the east basin were considered acceptable 

 for either plan 1 or plan 2. 



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