Distance Seaward from Breaking Point (m) 



03 



o 



Q. 

 t/) 



■a 

 a> 



M 



"to 



E 



HD.2- 



1 



10 



X 



XB 

 7VVg' 



7 t 

 B 20 



■ X 



X 











-o-= 



h ° ° 



1 

 50 



-0.4- 



7 



7 HO/^ 

 B qA X 











CE 



C 



ase 101 





-0.6- 



7 g' 

 78 



9 A 



A 













n 

 o 



A 



hr 



0-1 

 1-3 

 3-5 



















+ 



5-10 





-0.8- 



f A 















X 







10-12 

 12-15 







r 















V 



15-20 

 20-25.5 





-H 

















X 



25.5-30 





Figure 47. Comparison of net onshore sand transport rates seaward 

 of the break point and an empirical predictive equation 



tionary cases. The average value of A for all accretionary cases studied 

 (13 cases exhibiting mainly onshore transport) was 0.11 m"-"-, with a standard 

 deviation of 0.02 m"-^. There was significantly less spread in the values of 

 A for accretionary cases, indicated by the smaller standard deviation and 

 the more narrow range between minimum and maximum values (0.08-0.16 m ). 

 Contrary to the erosional cases, the spatial decay coefficient could not be 

 related with any significance to wave and sand properties. 



351. Secondary Zone I transport . The above analysis concerned Zone I, 

 the region from the break point and seaward, in the absence of multiple break 

 points. If wave reformation occurred and waves broke again closer to shore, 

 the region seaward of the second breaker appeared to show transport rate 

 characteristics similar to those in the region immediately seaward of the 

 first breaker line. Only a few of the cases had a second breaker, and often 

 the second breakpoint bar formed during the initial part of the run, rapidly 



144 



