56
2
2.1
R.I-I. Charlier and Clar. P. De Meyer
Suspended Load Transport
Introduction
The depth-integrated suspended load transport is defined as the depth-integration
of the product of velocity (u) and concentration (c), as follows (Fig.3) "
h
qs, o = f uedz
(5)
~t
Application of Eq. (5) requires information of the velocity profile, the
concentration profile and a reference concentration (ca). This latter variable
generally is specified at a reference level (z=a) close to the bed. Three prediction
methods based on this approach are described : Einstein (1950), Bijker (1971)
and Van Rijn (1984), while the formula of Bagnold (1966) is also given°
refer=ncg
level
average
bed level
profik h
velocity profi
\
saltation
/
\
layer
,,, \ ,'X~'~'~
,,
i- I ,q
-!"
"1
reference
concentration
Fig. 2 • Schematization velocity and concentration profile.