these variables on wave transmission can be investigated and that the model is 

 realistic in recognizing that all of these variables play a role in the trans- 

 mission process. 



8. At this point it is necessary to consider how the model might be 

 used to evaluate potential repair or rehabilitation strategies. Figure 2 



Figure 2. Transmitted wave height versus incident wave 

 height for reef breakwaters, in a water depth of 20 ft, 

 exposed to incident wave spectrum with period of peak 

 energy density of 8.0 sec 



shows the transmitted wave height versus the incident wave height for reef 

 breakwaters in 20 ft* of water with crest heights of 24, 26, and 28 ft respec- 

 tively, the period of peak energy density of the incident spectrum being 



8.0 sec and the stone having a median weight of 5,000 lb with a unit weight of 



3 

 165 lb/ft . The three different crest heights shown in Figure 2 could be 



regarded as representing three different states of repair of the same break- 

 water such as the initial, deteriorated, and severely deteriorated, respec- 

 tively. If the crest height of 24 ft represents the current state of the 

 structure, then the reduction in transmitted wave height that can be achieved 



A table of factors for converting non-SI units of measurement to SI 

 (metric) units is presented on page 3. 



