Hydrodynamic Equilibrium for Sediment Transport and Bed Response to Wave Motion

• Autorzy: Kaczmarek, L. M. , Sawczyński, Sz. , Biegowski, J.
• Języki publikacji: EN

Abstrakty

EN

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 zm 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 zm.

Słowa kluczowe

PL

równowaga hydrodynamiczna; równania liniowe; zmiana morfologiczna; grubość zgromadzonego osadu

EN

hydrodynamic equilibrium; linear equation of morphological changes; thickness of eroded/accumulated sediment; sand trap

• Czasopismo: Acta Geophysica
• Rocznik: 2015
• Tom: Vol. 63, no. 2
• Strony: 486--513
• Opis fizyczny: Bibliogr. 28 poz., rys., tab., wykr.

Twórcy

autor

Kaczmarek, L. M.

• University of Technology, Department of Geotechnics, Koszalin, Poland,

autor

Sawczyński, Sz.

• University of Warmia and Mazury, Department of Mechanics and Civil Engineering Constructions, Olsztyn, Poland,

autor

Biegowski, J.

• Polish Academy of Sciences, Institute of Hydroengineering, Gdańsk, Poland,

Bibliografia

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Identyfikatory

DOI

10.1515/acgeo-2015-0008