Flume Entrance-) Wove Goqes 



Profile view of the left test flume. 



SCALE 

 -Denotes Wove Goqe 1.0 2.0 3.0 4.0 50 

 Lccolion I 1 1 ^ 1 1 



Wall of Wove Tonk 



::»^ 



I To Wove Generator, 19 m ,^' • ■ ■ Grovel Absorber Beocti .' 



/P 



61 cm* •• 



I/' 



Trominq 



Wot Is 



Tronsmission ond 

 Overlqpp in q C n onnel 



TTtrLcturer 



Gravel Absorber Beoct> 



(V 



• • Runup Chonnel 



[Runup Board Goqi 



G 



I I I I 1 iU_ 



■Grovel Absorber Beocti .; 7. ■"'.'■.. 



Flume open lo 

 allow escope of 

 overtopping water 



"j Absorber 

 iMoleriol 



I, „;-.'t :■/■, I ;i''-;\'. 



12 3 4^X5 6 7 8 9 10 II 12 13 14 15 



WoM of Wove Tonl(— ^ Wove Tonli Stations (m) 



Figure 1. Plan view of wave tank setup. 



were produced by using the CERC Data Acquisition System (DAS) to create a signa] 

 to move the blade. Irregular waves were made by summing 50 components of vary- 

 ing amplitude, period, and random phase to produce a wide variety of spectral 

 shapes. 



3. Data Collection . 



The laboratory data collection scheme was designed after the CERC field 

 wave data monitoring program. Data collection was performed automatically by 

 the DAS in the following sequence: 



(a) Wave gages were calibrated. 



(b) Waves were produced for several minutes to allow tank startup 

 transient conditions to die out. 



(c) Wave gages collected data at a sampling rate of 16 times a 

 second over a 256-second sampling interval. 



(d) The 4,096 data points from each gage were then stored on 

 magnetic tape for analysis. 



(e) A 10-digit identification code consisting of the year, month, 

 day, hour, and minute of the data run was assigned (e.g., ID 7804260916 

 is a run made 1978, April, 26th day at 09:16). 



14 



