except the high-water condition was run first followed by the low-water condition 

 (Waves 4, 5, 6, 2, 3). Throughout the experiment, the waves were run in 15 min bursts, 

 with the water completely settling between wave bursts. Profiles were measured after 

 each two of these bursts, every 30 min of waves. 



5.2 Damage and Eroded Proflle Parameters 



In Chapter 3, damage was characterized by the nondimensional eroded area 

 5 defined by Equation 3. 1, and this parameter is used to describe damage herein. For a 

 damage analysis, the shape of the eroded portion of the slope may be characterized by 

 three parameters of primary engineering interest shown in Figure 5.1: cover depth d^, 

 eroded depth d^, and eroded length 4. The cover depth, the minimum remaining depth 

 of the cover layer along a profile, was shown by Torum et al. (1979) and Davies et al. 

 (1994) to be a useful parameter to characterize the reserve capacity of the armor layer. 

 For this experiment, the nondimensional cover depth was computed as the minimum 

 depth of armor layer remaining for each measured profile after each 30 min of waves 

 and normalized by the nominal stone diameter as 



d 

 ^ = -K- (5.1) 



where d^ was computed using Equation 4.12 and C is the normalized minimum cover 

 depth. 



83 



