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(Article of periodic en Anglais - 2011)

Document title

Modelling time varying scouring at bed sills

Authors(s) and Affiliation(s)

TREGNAGHI M. (1) ; MARION A. (2) ; BOTTACIN-BUSOLIN A. (3) ; TAIT S.J. (1) ;
(1) School of Engineering, Design and Technology, Univ., Bradford, ROYAUME-UNI
(2) Dep. of Hydraulic, Maritime, Environmental and Geotechnical Engineering, Univ., Padua, ITALIE
(3) Water & Environmental technology (WET) Engineering S.r.l., Treviso, ITALIE

Abstract

A modelling approach is presented to predict local scour under time varying flow conditions. The model is based on a number of hypotheses concerning the characteristics of the flow hydrograph, the temporal evolution of the scour and the geometry of the scour hole. A key assumption is that, at any time, the scour depth evolves at the same rate as in an equivalent steady flow. Experimental data are presented that show the scour hole development downstream of bed sills due to flood hydrographs follow a predictable pattern. Numerical simulations are performed with the same input parameters used in the experimental tests but with no post-simulation calibration. Comparison between the experimental and model results indicates good correspondence, especially in the rising limb of the flow hydrograph. This suggests that the underlying assumptions used in the modelling approach are appropriate

Source

Article of periodic

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

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

Millesime : 2011, vol. 36, no13 [pp. 1761-1769]

Bibliographic references : 48 ref.

Collation : 5 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2198

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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