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(Article of periodic en Anglais - 2010)

Document title

Experimental study on transient and steady-state dynamics of bedforms in supply limited configuration

Authors(s) and Affiliation(s)

DREANO J. (1) ; VALANCE A. (1) ; LAGUE D. (2) ; CASSAR C. (2) ;
(1) Inst. de Physique, UMR CNRS 6251, Univ. Rennes 1, Rennes, FRANCE
(2) Géosciences, UMR CNRS 6118, Univ. Rennes 1, Rennes, FRANCE

Abstract

The experimental setup is a rectangular closed duct combining an innovative system to control the rate of sediment supply, and a digitizing system to measure in real time the 3D bedform topography. The AA. carried out different sets of experiments with 2 sediment sizes varying both the sediment supply and the water flow rate to obtain a total of 46 different configurations. After a transient phase, steady sub-centimeter bedforms of various shapes have been observed: barchans dunes, straight transverse dune, linguoid transverse dunes and bedload sheets. Height, spacing, migration speed, and mean bed elevation of the equilibrium bedforms were measured. The experimental results provide a new quantification of the factors controlling equilibrium height and migration speed of bedforms in supply-limited conditions against which theoretical and numerical models can be tested

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, no14 [pp. 1730-1743]

Bibliographic references : 27 ref.

Collation : 23 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2085

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