Test Equipment and Facilities 



All tests were conducted in a 3-ft-wide segment of a concrete wave flume 

 lift wide and 245 ft long (Figure 2). A IV on 100H slope, representative of 

 the existing prototype lake bottom, was molded lakeward of the test section. 

 Irregular waves were generated by a hydraulically actuated piston-type wave 

 machine. 



Wave data were collected on electrical capacitance wave gages which were 

 calibrated daily with a computer-controlled procedure incorporating a least 

 square fit of measurements at 11 steps. This averaging technique, using 21 

 voltage samples per gage, minimizes the effects of slack in the gear drives and 

 hysteresis in the sensors. Typical calibration errors are less than 1 percent of 

 full scale for the capacitance wave gages. Wave signal generation and data 

 acquisition were controlled using a DEC Micro Vax I computer. Wave data 

 analyses were accomplished using a DEC VAX 3600. 



Chapter 2 The Model 



