Suh and Dalrymple (1987) 



36. Based on unsealed monochromatic movable-bed laboratory tests, Suh 

 and Dalrymple (1987) give relationships for salient length, X^ , given 

 structure length Lg and location in surf zone for single offshore breakwa- 

 ters : 



X, = 0.156 L^ — ^ < 0.5 R = 0.98 (39) 



X^ = 0.317 L^ 0.5 < — ^ < 1.0 i? = 0.85 (40) 



X, = 0.377 L, -^ ^ 1.0 R = 0.75 (41) 



s ^ X 



where R is the correlation coefficient. 



37. Combining the laboratory results with available prototype data, the 

 following relationship for salient length is obtained: 



X (14.8) ^ e\" "I '' I (^2) 



Tombolos usually formed for single prototype breakwaters when 



-^ ^ 1.0 (43) 



For multiple offshore breakwaters, tombolos formed when 



L„ X 



-0.5 (44) 



Harris and Herbich (1986) 



38. Harris and Herbich (1986) conducted a series of movable bed 

 (DjQ =0.63 mm) monochromatic physical model tests to evaluate the effect of 



23 



