Combination of the bedload and suspended load will predict the total 
amount of sediment in motion under specified wave and boundary conditions. 
By SuperimpoSing a constant unidirectional flow, such as the mass trans- 
port or a coastal current, the amount of sediment transport can be 
estimated. 
In this investigation, as in many research projects, the experimental 
research preceded the development of a suitable method of describing sedi- 
ment Suspension. For this reason a description of the experiments and 
their results will be given first, followed by a discussion of how the 
results can be used to predict the sediment suspension load. 
II. CONCENTRATION DISTRIBUTIONS 
1. Experimental Apparatus. 
Experiments and observations indicate that near the ocean bottom off- 
shore of the breaker zone in relatively deep water, sediment is held in 
suspension. This is due to the turbulence resulting from the dissipation 
of wave energy on the rough ocean bed. For waves with a small surface 
slope, where 0/dx << d/dy, the fluid motion can be approximated from 
linear wave theory. The equations describing the horizontal and vertical 
displacement of a fluid particle are given by the expressions from Lamb 
(1932): 
ee (3) {cosh [k (y+d) ]/sinh(k d)} cos(k x - w t) (1) 
A = (3: {sinh [k (ytd) ]/sinh(k d)} sin(k x - w t) (2) 
where 
d = the water depth 
y = the distance from the mean water surface measured negatively 
downward 
H = the crest-to-trough wave height 
KS Baia 
1 = the length of the surface wave 
Wei=we2h/ile 
T = the period of the surface wave 
