DIAGRAMMATIC PLAN OF MOORING ARRANGEMENT 

 AND WAVE RIDER BUOYS 



Figure 182. Mooring arrangement of the Harris floating breakwater field 

 test at Stokes Bay, England (after Harris and Thomas, 1974). 



The Harris floating breakwater performance was measured by percentage 

 energy reduction, with wave data collected in digital form on magnetic tape, 

 to determine the wave energy spectrum. Figure 183 shows a typical wave energy 

 spectrum for one test run from both the windward and leeward sides of the 

 structure. The attenuation factors developed for waves of 1.5 to 3.0 seconds 

 are shown in Figure 184. For the data obtained, most of the results occurred 

 between the curve, for a free plate, and the theoretical wave tank curve, for 

 a rigidly fixed plate, indicating that only short sections, which are stabi- 

 lized by adjacent sections in a long breakwater are attacked by waves at a 

 given time. 



Significant Incident Wave'length .6i M. 

 Significant Incident wave" Height -C21M. 



22- 











20- 











IB- 











16- 





In 



cident 



Waves "7 \ 



=11- 





















Sl2- 











E 











HO- 











= 8- 

 2- 





^/ 



// 

 // 

 1/ 



\ 



V^ Transmit-ted Waves. 

 \ 





02 





0-3 



Of. 5 06 07 

 Frequency (CPS) 







3C 



20 



10 5 



Wavelength [M) 



Figure 183. Incident and transmitted wave spectrum of Harris floating 

 breakwater at Stokes Bay, England (after Harris and Thomas, 

 1974). 



243 



