E 30 

 E 



20 



o10 

 in 



BEACH- FILL LEVEL: 



o LOW 

 ▲ MEDIUM 

 • HIGH 



A' 



o ^; 





,.^ 



+ 



^0 12345678 



Lg Dg (xlQ-^) m ^ 



Figure 5. Relationship to predict gap erosion for pocket 

 beaches (after Berenguer and Enriquez 1988) 



performing a regression analysis of the Mediterranean pocket beach data and 

 making some simplifying assumptions about wave height at the gap, //g . The 

 wave height was assumed equal to 0.78 times the depth at the gap, dg , with a 

 maximum value of 3.0 m. The variables //g , dg , and Lg should be in 

 meters, and D50 in millimeters (the relationship is not dimensionless) . The 

 gap erosion (1 + X^) is predicted well, with a squared correlation coeffi- 

 cient of 0.78: 



{X 



H'i 



(29) 



20 



