getting good pressure records; however, it was sometimes necessary to 

 eliminate air in the connecting hoses. Occasionally, wave action would 

 induce small currents behind the runup board which caused the connecting 

 hoses to sway back and forth slightly", resulting in small pressure fluc- 

 tuations that were not due to runup. 



III. TEST CONDITIONS AND PROCEDURES 



Tests conducted during this study included a series of runs with only 

 monochromatic waves, and a series with both monochromatic and irregular 

 waves. In testing with monochromatic waves, the periods used were 0.72, 

 1.00, 1.55, 1.85, 2.63, 3.65, and 4.70 seconds. These conditions and 

 others had previously been tested by Saville (1956) and Savage (1958). 

 The procedure used by Saville and Savage of running the waves in bursts 

 to reduce the influence of wave reflection, was also adopted for the mono- 

 chromatic waves but not the tests comparing the runup of monochromatic 

 waves to irregular waves. The running of tests similar to Saville and 

 Savage was done to gain experience in using the runup gage and, if their 

 results could be reproduced, gain confidence in the gage. The wave condi- 

 tions and runup data collected by Saville (1956) and Savage (1958) are 

 given in Table 1; the corresponding data obtained during this study are 

 given in Table 2. 



Table 1. 1 



*unup dat 



a by Savi 



Lie (1956) and Savage 



(1958). 



T 

 (seconds) 



H 



(feet) 



R 

 (feet) 



T 

 (seconds) 



H 

 (feet) 



R 

 (feet) 



0.72 

 0.72 

 0.72 

 0.72 



1.00 

 1.00 

 1.00 

 1.00 



1.55 

 1.55 

 1.55 

 1.55 



1.85 

 1.85 

 1.85 



1.85 



0.040 

 0.114 

 0.150 

 0.192 



0.060 

 0.176 

 0.280 

 0.396 



0.046 

 0.128 

 0.210 

 0.360 



0.048 

 0.124 

 0.204 

 0.320 



0.027 

 0.046 

 0.055 

 0.063 



0.050 

 0.090 

 0.108 

 0.125 



0.075 

 0.145 

 0.173 

 0.205 



0.090 

 0.153 

 0.192 

 0.257 



2.63 

 2.63 

 2.63 

 2.63 



3.65 

 3.65 

 3.65 

 3.65 



4.70 

 4.70 

 4.70 

 4.70 



0.032 

 0.088 

 0.140 

 0.210 



0.024 

 0.058 

 0.092 

 0.152 



0.016 

 0.044 

 0.066 

 0.112 



0.099 

 0.178 

 0.225 

 0.276 



0.053 

 0.135 

 0.189 

 0.292 



0.046 

 0.124 

 0.185 

 0.268 



NOTE: Smooth 1 on 10 slope, water depth 

 (0.38 meter). 



1.25 feet 



The wave conditions used to compare the runup of monochromatic and 

 irregular waves are shown in Table 3. Data from each of the wave condi- 

 tions were collected during one long continuous run. When wave conditions 



12 



