Table 7 

 Forms of Various Bed-Load Transport Formulae 



Author /Date Formula 



DuBoys (1879) Q s = A r (r - r c ) 



Waterways Experi- Q s = — (r - r c ) m 

 ment Station 

 (1935) 



Shields (1936) Q s = A Q S KT ° ' T * } 



(P s - P) g D 



Dependence 

 Qs on 



of 



V 



V 4 





Kalinske (1942) Q s = U* D f 



CO 



(• \1.5 



Meyer -Peter- Q s = A — — ° <^ V 3 



Muller (1948) (p s - p) g D 



Brown (1950) Q s = A D 15 * 3 V 6 



Madsen and Oscillatory flow u£ 



Grant (1976) 



Hallermeier (1982) Oscillatory flow u 3 , 



Sawamoto and Sheet flow V 3 



Yamashita (1986) 



Katori et al . (1984) Oscillatory tank with V 3 



unidirectional current 



Kraus , Gingerich, Field longshore u^ V 



and Rosati sand transport 



(1988) 



Experiment variability 



91. The standard error of estimate (Miller and Freund 1985), an indica- 

 tion of the deviation of measured from predicted flux, was calculated for each 

 type of nozzle and basin test using N-2 degrees of freedom as follows: 



I (f, " fp) 2 



S„ = 



N-2 



where 



S y = standard error of estimate (g/cm 2 /min) 



64 



(16) 



