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(Article of periodic en Anglais - 2010)

Document title

A simple model of bedform migration

Authors(s) and Affiliation(s)

BARTHOLDY J. (1) ; ERNSTEN V.B. (2) ; FLEMMING B.W. (3) ; WINTER C. (2) ; BARTHOLOMÄ A. (3) ;
(1) Dep. of Geography and Geology, Univ., Copenhagen, DANEMARK
(2) MARUM, Univ., Bremen, ALLEMAGNE
(3) Senckenberg Inst., Wilhelmshaven, ALLEMAGNE

Abstract

A model linking subaqueous dune migration to the effective (grain related) shear stress is calibrated by means of flume data for bedform dimensions and migration rates. The effective shear stress is calculated on the basis of a new method assuming a near-bed layer above the mean bed level in which the current velocity accelerates towards the bedform crest. As a consequence, the effective bed shear stress corresponds to the shear stress acting directly on top of the bedform. The model operates with the critical Shields stress as a function of grain size, and predicts the deposition (volume per unit time and width) of naturally-packed bed material on the bedform lee side

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2010, vol. 35, no10 [pp. 1211-1220]

Bibliographic references : 1 p.

Collation : 5 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2002

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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