Y = 15 bar retention = f ("oOM, %F, Pb) 



(1) Y = 



REDG - 



CREDG - LEDG) 



15 



N 



(15 - OM) 



N 



0.982 



(2) REDG = RL + 2.9 e 



RL = 9.2 + 4.686 e 



1 



0.7 

 (Pb - 0.9] 



0.7 



0.5 



- 0.086 



(3) LEDG = LL + 1.478 e 



LL = 0.28 + 5.054 e 



55 



1 



4.3 



0.682 

 (Pb - 0.91 



0.9 



0.008 

 1.5 



1 ' 



0.7 



0.554 



(4) N = NFLOR + NSIG 



NFLOR = 1.488 + 0.212 e 



(Pb - 0.9) , 

 0.9 



0.31 



NSIG = 3.704 X 10'^ (55 - F)^'^ + 0.05 e 



(55 - F) 

 47 

 0. 16 



NOTE: < OM < 15% 

 .9 £ Pb < 1 . 8 



< F < 55% 



20 



• U.S. GOVERNMENT PRINTING OFFICE: 1 973 _ 784-487 / 28 REGION NO. 8 



