. 





o P14 





" - -2m 



175 - 



o 



I 



T7C 



; 





^- 



•^ 



C 



° 



ZONE 









CM2^ C 



C 

 CMI A C 



J 







125 - 



1 ^0.45m TIC 



" 





-0.45m 





BEACH 



BASE CAMP 



o PI 







SCAFFOLD 

 CAMERAS 











DUNE LINE 





INSTRUMENT 

 TRAILER 









'•^ 50- 



«.v 



- 



1000 975 950 925 900 875 850 825 



t 



Distance Alongshore, M (FRF Coord System) 



Figure 2. Base camp and typical arrangement of 

 a sand-trapping experiment 



The surf zone data collection group consisted of approximately 15 members; 

 work was divided into four functional areas of sand trapping, current measure- 

 ment, wave measurement, and beach profile surveying. 



16. A small rip current is frequently located just north of the FRF 

 property line. It was intended to use the southern longshore feeder current 

 of the rip as a dependable source of a steady and unidirectional longshore 

 current when the direction of the current generated by oblique wave incidence 

 became confused. The longshore sand transport rates and the current moving 

 the sand were produced by combined oblique wave incidence and the rip feeder 

 current. In comparisons to theoretical expressions, it would be invalid to 

 use predictive formulas for either the longshore current or the longshore sand 

 transport rate that are solely functions of parameters related to obliquely 

 incident waves . 



12 



