Instantaneous velocity field characterization through stacking velocity variography

2001 ◽  
Author(s):  
D. Geraets ◽  
A. Galli ◽  
P. Ruffo ◽  
E. Della Rossa
Keyword(s):  
Velocity Field ◽  
Instantaneous Velocity ◽  
Instantaneous Velocity Field

scholarly journals A MODEL FOR CROSS-SHORE SEDIMENT TRANSPORT

1986 ◽  
Vol 1 (20) ◽  
pp. 114 ◽  
Author(s):  
M.J.F. Stive
Keyword(s):  
Sediment Transport ◽  
Velocity Field ◽  
Laboratory Data ◽  
Instantaneous Velocity ◽  
Time Dependent ◽  
Stokes Wave ◽  
Instantaneous Velocity Field ◽  
Random Waves ◽  
Dependent Model ◽  
Time Dependent Model

A model for cross-shore sediment transport due to random waves is described which adopts a vertically integrated transport description for sheetflow situations. The formulation of the transport as a function of the instantaneous velocity field is based on the approach of Bailard (1981). This approach assumes in essence that the instantaneous transport is proportional to some power of the instantaneous near-bottom velocity. Implementation of this transport description in a time-dependent model requires a formulation of the time-mean and some low order moments of the near-bottom velocity field. An initial formulation based on a monochromatic, second order Stokes wave representation is presented. The model is checked on the basis of both field and laboratory data. Some consequences for further study are indicated.

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