ESTIMATE OF NEAR-BOTTOM WAVE-INDUCED SEDIMENT CONCENTRATION

The aim of the work is to develop a method of calculation for the magnitude of sediment concentration suspended by waves on some level z = c near the vottom S(c), which can be later used as a normalizing coeficient for recalculation of S(z)/S(c) to absolute concentration. Considering the results of previous investigation we assume that S(c) is determined according to the relationship between orbital bottom velocuty u and settling velocity of the particles, at this level omega(c). We also assume that coordinate c is a ''floating'' but not a constant term, as it was considered in the most models. This coordinate c and omega(c) are determined from the relationship between S(c) and u/omega(c) and the condition of independent motion of fracture of defferent origin in the flow. The relationship is determined according to laboratory and field experiments.