the empirical parameters in these equations may need to be varied somewhat with wave 

 period and armor gradation. 



The relations given in this thesis for eroded area and damaged profile 

 prediction can be used to predict the future performance of a new or damaged structure. 

 They can be used to predict damage for a single design event or in a simulation to 

 predict the life-cycle costs. Further, because the variability in damage is given, these 

 equations can be used to predict the reliability of a given design or of a damaged 

 structure. The equations described above are valid for the range of wave, water level, 

 and structure conditions within this experiment. Employment of a critical stability 

 number for measurable damage may be necessary to reduce the number of storms 

 required in a life-cycle analysis. These relations should be conservative because the 

 structures were relatively impermeable, relatively low crested, and exposed to severe 

 breaking waves. But they may not be conservative for more highly grouped wave 

 conditions and other structure slopes. Therefore, care should be taken in extending 

 these relations for conditions not tested herein. Additional experiments are being 

 conducted to evaluate the generality of these equations. 



151 



