PART III: EXPERIMENT OVERVIEW 



69. This section describes the laboratory movable-bed test facilities used to verify the selected scaling 

 criteria, summarizes the prototype condition selected for reproduction in the scaled model, presents the 

 model scaling as determined by the scaling criteria, provides a generalized description of the testing 

 procedure, and lists the experiments conducted over the course of this investigation. 



Laboratory Facilities 



70. The majority of tests described in this report were conducted in a 6-ft-wide wave tank at the 

 Coastal Engineering Research Center (CERC), US Army Engineer Waterways Experiment Station (WES), 

 during the period October 1988 - January 1989. The testing was preceded by a 2-month period of model 

 preparation and wave machine calibration. Three additional tests were conducted in the 6-ft flume during 

 September 1989. These tests were to confirm the results of one of the earlier tests and to verify the 

 modeling guidance by reproduction of an irregular wave prototype-scale flume test. 



71. The 6-ft flume is constructed of concrete and has glass viewing panels in the test section, which is 

 located 75 m from the wave board. Figure 2 shows a plan view of the wave tank and supporting facilities, 

 and a profile view of the flume is given on Figure 3. The flume has dimensions and capabilities as listed in 

 the following tabulation: 



Length 100.0 m (328 ft) 



Width 1.83 m (6.0 ft) 



Depth 1.83 m (6.0 ft) 



Max. Water Depth 1.22 m (4.0 ft) 



Max. Wave Board Stroke 0.66 m (2.2 ft) 

 Max. Wave Height 0.50 m (1.6 ft) 



72. The wave machine used in the 6-ft flume is hydraulically operated and is constructed such that it 

 may be used in either the flapper or piston mode, and it can generate waves of 0.5 m at maximum 

 operating conditions. For the reported tests, the wave machine v/as operated in the piston mode to 

 generate both regular (monochromatic) and irregular waves. Figure 4 is a graphic representation of the 

 maximum regular wave height generating capabilities of the wave generator as a function of wave period at 

 the maximum water depth of 1.22 m. 



73. Piston stroke and frequency for both regular and irregular waves are controlled using CERC 

 software and a Micro- Vax I microcomputer. During operation of the wave generator, feedback from the 



26 



