(Article of periodic en Anglais - 2014)

Document title

Sensitivity of interfacial hydraulics to the microtopographic roughness of water-lain gravels

Authors(s) and Affiliation(s)

RICE S.P. (1) ; BUFFIN-BÉLANGER T. (2) ; REID I. (1) ;
(1) Centre for Hydrological and Ecosystem Science, Univ., Loughborough, ROYAUME-UNI
(2) Groupe de Recherche sur les Environnements Nordiques, Univ. du Québec, Rimouski, CANADA


The AA.hypothesized that different gravel-bed microtopographies generate measurable differences in hydraulic characteristics within the interfacial layer. This was tested using a high density of spatially and vertically distributed, velocity time series measured in the interfacial layers above 3 surfaces of contrasting microtopography. Analysis was repeated for 3 discharges to evaluate whether discharge affected the impact of microtopography on interfacial flows. Between-surface differences in the median and variance of several time-averaged and turbulent flow parameters were tested using non-parametric statistics. It is highlighted that observable differences in microtopography do not necessarily produce differences in interfacial hydraulics. An important observation is that appropriate roughness parameterizations for gravel-bed rivers remain elusive, partly because the relative contributions to flow resistance of different aspects of bed microtopography are poorly constrained


Article of periodic

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

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

Millesime : 2014, vol. 39, no2 [pp. 184-199]

Bibliographic references : 2 p.

Collation : 8 fig., 5 tabl.



INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3438

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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