.... IN,: Sediment Transport
3
3.1
79
Total Load Transport
Prediction Methods of Einstein, Bagnold, Bijker and Van
Rijn
The total transport of bed material particles according to the methods of Einstein
(1950), Bagnold (1966), Bijker (1971) and Van Rijn (1984) can be obtained by"
addition of the bed load and suspended load transport :
qt = qu + q~
(36)
Two typical total load formulas are those of Engelund-Hansen (1967) and
Ackers-White (1973). Both methods have a good predicting ability compared
with measured data, as shown by a verification study of White et al. (1973).
3.2
Prediction Method of Engelund-Hansen (1967)
Based on energy considerations and calibration using about 100 flume data, the
following formula was proposed •
0.0~(~)5
qt,e
(s- I)2 x/gdsoC3
in which "
q~o = total bed material transport
u
= depth-averaged velocity
C
= overall Ch6zy-coefficient
dso = median particle diameter of bed material
s
= P~/s = specific density (= 2.65)
g
= acceleration of gravity
(37)
(m2/s)
(m/s)
(m/s)
(In)
(-)
(m/s ~)