Figure 4. Model layout 



The existing breakwater, jetty, and revetments at Saco River and Camp 

 Ellis Beach are rubble-mound structures. Experience and experimental 

 research have shown that considerable wave energy passes through the inter- 

 stices of this type structure; thus, the transmission and absorption of wave 

 energy was given close consideration during design of the l:100-scale model. 

 In small-scale hydraulic models, rubble-mound structures reflect relatively 

 more and absorb or dissipate relatively less wave energy than geometrically 

 similar prototype structures (LeMehaute 1965). Also, the transmission of wave 

 energy through a rubble-mound structure is relatively less for the small-scale 

 model than for the prototype. Consequently, some adjustment in small-scale 

 model rubble-mound structures is needed to ensure satisfactory reproduction of 

 wave-reflection and wave-transmission characteristics. In past investigations at 

 WES (Dai and Jackson 1966, Brasfeild and Ball 1967), this adjustment was 



Chapter 2 The Model 



