Evaluation of bedload yield in gravel-bed rivers using scour chains and painted tracers : the case of the Esconavette Torrent (Southern French Prealps)

Field monitoring of bedload transport and particle entrainment : calibration efforts and new developments. Special issue

Auteurs :
LIÉBAULT, F.
LARONNE, J.B.
PIÉGAY, H.

Description :
The event-based bedload yields of a small gravel-bed river (the Esconavette Torrent) have been concomitantly determined by surveying coarse sediment deposition in a trap and by monitoring the active layer of the bed and the displacement of painted tracers. The geometry of the active layer was obtained by means of scour chains and topographic surveys. The results demonstrate that a distance between scour chains that represents 10-15% of the active channel width is sufficient for a rather accurate determination of event bedload transport rate by reconstruction of scour and fill throughout a cross-section.


Type de document :
Article de monographie

Source :
Geodinamica acta, issn : 0985-3111, 2008, vol. 21, n°. 1-2, p. 23-34, nombre de pages : 12, Collation : Illustration, Références bibliographiques : 38 ref.

Date :
2008

Editeur :
Pays édition : Royaume-Uni, Abingdon, Taylor and Francis