PART IV: VERIFICATION TESTS 



89. Verification of the selected movable-bed scaling criteria by reasonable reproduction of prototype 

 test profiles was the primary purpose in conducting the experiments discussed in this report. No clear 

 quantitative guidance has been given for determining what constitutes successful reproduction in the model, 

 although Dean (1985) lists reproduction of the correct beach slope and type of profile (barred or nonbarred) 

 as good indicators of the relative success of the attempt. Generally, a visual comparison between prototype 

 and model profiles, supplemented by some type of parameter describing the variations between profiles, 

 forms the basis for a subjective opinion as to whether or not the experiment has been successful. 



Regular Wave Validation Test 



90. The first two tests performed (TOl and T02 in Table 3) were conducted with a sand berm having a 

 scaled horizontal width equivalent to 10 m in the prototype (see Figure 6). After completing these two 

 tests, plotted results indicated a discrepancy in volumes of sand between model and prototype. It was 

 subsequently discovered^ that the prototype berm was actually 11 m in the horizontal dimension, slightly 

 greater than the nominal horizontal width given as 10 m. Hence, the tests TOl and T02 represented a berm 

 having approximately 10 percent less sand than the actual prototype berm. These tests will be discussed 

 later in relation to experimental repeatability and impacts of reduced or inadequate sediment supply. 



Test T03 Results 



91. Test T03 represents the best attempt to reproduce every aspect of the prototype experiment in 

 accordance with the selected scaling criteria. Summary wave statistics resulting from analysis of water level 

 fluctuations recorded at the two gaging locations are given for Test T03 on Table B3 in Appendix B. (A 

 description of the wave analyses procedures is given in Appendix A.) Time series wave statistics in 



Table B3 refer to the average of the results obtained from the three gages comprising the array at each 

 location. Spectral values {HmotTp, where Hmo — zeroth-moment wave height and Tp = period of spectral 

 peak) represent the incident wave condition after removal of reflected wave components. 



Personal communication with Dr. Klemems Uliczka confirming horizontcLl berm width used in prototype case, 28 Decem- 

 ber 1988. 



36 



