Effective discharge and gravel-bed rivers
Sediment transport dynamics. Special issue
Auteurs :EMMET, W.W.
WOLMAN, M.G.
CHURCH, M.
HASSAN, M.A.
Description :
Rivers with constraints on the mobility of bed material, typically armoured channels with steeper than average relationship of bedload discharge to water discharge, may have an effective discharge occuring at higher stages and greater recurrence intervals than bankfull discharge. Bedload discharges were measured at 5 snow-melt dominated, gravel-bedded rivers in the northern Rocky Mountains, USA. Data indicate that, as the exponent of the bedload rating increases from typical to more steep values, effective discharge increases from near-bankfull discharge to, in this study, about 1.3 bankfull discharge. This represents about a doubling of the recurrence interval.
Type de document :
Congrès
Source :
Conférence internationale. Drainage basin dynamics and morphology, Jérusalem, Israel, 1999-05, Earth surface processes and landforms, issn : 0197-9337, 2001, vol. 26, n°. 13, p. 1369-1380, nombre de pages : 12, Collation : Illustration, Références bibliographiques : 20 ref.
Date :
2001
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)