Nearbed Sediment Concentration from Tracer Studies

Pruszak, Zbigniew; Wierzchnicki, R.; Owczarczyk, A.; Zeidler, Ryszard B.

doi:10.1061/9780784402429.301

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“…This value was established whilst the rectangle area, expressed by the relation of lab max ST L z , is equal to the trapezoid area with inclined sides, as shown in Fig. 10 and a , assessed in the experiments conducted on the Atlantic updrift coast with the use of fluorescent tracers (Balouin et al 2005) and close to field max 2 3cm z assessed in the former experiments carried out in the Baltic coastal zone by Pruszak et al (1996).…”

Section: Calculation Results In Comparison To Measurementsmentioning

confidence: 99%

Hydrodynamic Equilibrium for Sediment Transport and Bed Response to Wave Motion

2015

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An experimental and theoretical identification of hydrodynamic equilibrium for sediment transport and bed response to wave motion are considered. The comparison between calculations and the results of laboratory experiments indicates the linear relation between sediment transport rate and the thickness z m of bed layer in which sediments are in apparent rectilinear motion. This linear relationship allows to use the first order "upwind" numerical scheme of FDM ensuring an accurate solution of equation for changes in bed morphology. However, it is necessary to carry out a decomposition of the sediment transport into transport in onshore direction during wave crest and offshore direction during wave trough. Further, the shape of bed erosion in response to sediment transport coincides with the trapezoid envelope or with part of it, when some sediments still remain within it. Bed erosion area is equal to the one of a rectangle with thickness z m .

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Section: Calculation Results In Comparison To Measurementsmentioning

confidence: 99%