FIND : Whether continuous flooding of the backshore can be expected 

 when wave setup is considered. 



SOLUTION : In this case, assume that H = K' Then, H^, can be found 

 from Figure 2 with 



—r- = 0.00647 



and m = 0.05 ; 



thus, -^ = 1.16 



or H^ = 34.80 feet . 



From Figure 3, with K^, = 34.80 feet 



H 



■b 



gT 



0.007505 



and m = 0.05 ; 



thus, — = 0.124 



or S,, = 4.3 feet 



Therefore, the MWL will be at elevation +19.3 feet which is 0.7 

 feet below the top of the dunes. Extensive flooding should be 

 expected. If desired. Section 7.22 of the SPM could be used to 

 estimate the quantity of flow over the dune. 



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