Effect Of Settling Velocity On The Modelling
Of Suspended Sediment Transport
Author(s)
L.I. Portela
Abstract
Several tests have been performed with a two-dimensional horizontal model, in order to assess
the effect of settling velocity (w,) on the simulation of suspended sediment transport. It is shown
that, in the Tagus estuary (Portugal), results are more sensitive to the variation of settling
velocity (of the order of 1.0-3.0 mm s~*) than to the variation of the critical shear stress for
deposition (of the order of 0.1-0.3 Pa). The formulation of settling velocity is also important,
notably when spring and neap tide results are compared (variation of suspended sediment for
constant w, is 2 times greater than for concentration-dependent w,).
1 Introduction
Settling velocities of cohesive sediment aggregates, although substantially
higher than those of fine individual particles,
Keywords
Related Book
Other papers in this volume
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