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19. ABSTRACT (Continued). 



altered the breaking wave form. Return flow was strongest if the bars were terraced or if the 

 seaward slope /? t was steep, and the deepwater wave steepness H /Lo was small. The position 

 of the break point was greatly influenced by return flow, which exerted control over the 

 breaker depth. Breaker height was found to increase in the presence of strong return 

 flow. Plunge distance normalized by breaking wave height was found to be shorter over 

 irregular slopes than plane slopes. 



The results from the study can be used in numerical models simulating beach shoreline 

 change and in studies of wave height decay. 



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