Figure 18 presents the present data set along with the data set used in the 

 SPM relationship. 



uuu 











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— 









^^ 



— 



^ 





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^~ 



--rm 



800 







































1 











































600 

 SOO 

 400 

 300 



200 

 100 









































/ 









































/ 





































°o 



A 







































/ 





3 

































/ 



/ 

























• 















1 







































/ 













80 































X 









































1 









60 

 50 

 40 

 30 



20 

 10 





























< 





1 































/ 









X 









-I=O.^H h';3 



(bPM, la^ / ; 





A 



A 



/ 







\ 



• 

























N 



^ 





V 









• 





1 





















A 



^/ 



/ 







( 

































y 













LEGEND 

































8 

















/ i 







+ Wotfs, D = 0.4 mm 























6 

 5 

 4 



3 

 2 















■ 









A Komar and Inman, 0=0.18 mm 













/ 











A Komor ond Inmon, 0=0.6 mm 











/ 



















/ 















• This Study, Pys- Vio LEO 

 Current, D '- 0.2 mm 





/ 



/ 

















/ 



/ 



















o 



L 



Ttiis Study, P/s 

 Oirectionol Sped 



^10 Wove Gag 

 ro, = 0.2 mm 



1 1 1 



8 



2 3 4 5 6 78 10 20 30 40 60 80100 200 400 600 1,000 



Longshore Energy Flux Factor ot Breaking, 9. (N/s ) 



Figure 18, 



Summary of field data I versus Pj 

 results of this study. 



including 



Using the data in the SPM sand transport relationship along with the results 

 of the present_study, an average K can be found, based on 42 field data 

 points, to be K = 0.87. 



This value of K is only 11.5 percent higher than the existing value of 

 K in the SPM. In view of the large standard deviations encountered in the 

 data sets, it is suggested that the existing SPM relationship remain unchanged 

 until additional quality data are analyzed in future studies. 



5 . Conclusions . 



Measurements of immersed sediment transport rate, I, as inferred from 

 sediment accumulation in a near-total trap were correlated with longshore energy 

 flux factor at breaking, Pj , as calculated in phase I from two pressure sensors 

 mounted near the bottom and in phase II from LEO wave height and longshore cur- 

 rent observations. Based on the analysis of 7 correlation periods between sand 

 accumulation and wave gage data (phase I) 11 correlation periods between sand 

 accumulation and LEO wave observations (phase II), it is concluded that: 



38 



