Examples 



164. Examples of wave energy windows and transport calculation domains 

 for a hypothetical modeling project are given in Figure 16. In this and 

 similar figures, a diffracting tip of a structure is indicated by emanating 

 circular wavelets; nondiffracting tips of structures have no wavelets. 

 Structures allowing wave transmission are also indicated by emanating wave- 

 lets. The vertical scale on this figure is greatly exaggerated. The energy 

 windows are labeled by E1-E5 and the structures by S1-S6. 



DISTANCE ALONGSHORE * 



Figure 16. Energy windows and transport calculation domains 



El: This semi-infinite window is bounded only on the right side, the 

 open sea being on the left side. Waves entering though El are diffracted by 

 the left tip of structure SI. Waves entering through this window (or through 

 window E2) cannot arrive at beaches to the right of structure S3 and, there- 

 fore, do not directly generate sand transport to the right of S3. Sand 

 bypassing from left to right at S3 can occur, supplying a boundary condition 

 to the transport domain defined by the region between S3 and S4. 



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