discussed in Jackson (1968). The table gives damage as a function of wave height 

 relative to the zero-damage wave height for several armor types. The tabulated values 

 can be used to formulate an equation for armor stone damage. As an aside, note that the 

 dolos damage progression in the table is limited to stability and does not include 

 breakage. But because dolos movement causes breakage, this damage progression may 

 not be conservative. 



Table 3.1 



Jackson (1968) Breakwater Damage from 



Table 7.9 of SPM (1984) 



Percent 

 Damage 



Rough 

 Stone 

 mH.0 



Smooth 

 Stone 



2 to 5 



1.00 



1.00 



5 to 10 



1.08 



1.08 



10 to 15 



1.19 



1.14 



15 to 20 



1.27 



1.20 



20 to 30 



1.37 



1.29 



30 to 40 



1.47 



1.41 



40 to 50 



1.56 



1.54 



A simple empirical model for the best fit line through the data points in the 

 table for rough stone damage is given by 



D% =/ 



H 



//. 



2.79 exp 



H 



\ "do/ 



18.08 



(3.6) 



45 



