FIND : Longshore energy flux factor, P^g 

 SOLUTION : 



(a) Using equation (2) calculate V/Voj^jj 



(feL = °-^(lf)-»™(Ti)-(l§)=0-" 



(b) Now, using equation (1) calculate P^g. 



P 64( 5)C150j(0-5)C0.01) .^ , ^ roc i i -i ^ 



Pis ~ — ^/ — N~ ~ 55.3 pounds (25.1 kilograms) per second 



(|i) (0.33, 



(c) The value of P^g corresponds to a sediment transport rate of 415,000 

 cubic yards (317,310 cubic meters) per year using the SPM equation (4-40) 



(Q = 7.5 X 103 P£g in feet-per-second system). 



(d) Annual average sediment transport rates for any field site would be 

 estimated from LEO with a P^g value obtained by averaging the P^g values 

 computed for each observation by the above method. 



