Testing bedload transport equations with consideration of time scales

Auteur(s) et Affiliation(s)



Description :
This paper aims to identify how the time scale considered can affect bedload prediction. This was done by testing 16 common bedload transport formulas with 4 data sets corresponding to different measurement period durations : (1) highly fluctuating (quasi-)instantaneous field measurements; (2) volumes accumulated at the event scale on 2 small alpine gravel-bed rivers, potentially affected by seasonal fluctuations; (3) volumes accumulated at the interannual scale in a meandering gravel bed river, thought to be weakly subject to fluctuations; (4) time-integrated flume measurements with nearly uniform sediments. The tests confirmed that the longer the measurement period, the better the precision of the formula's prediction interval. They also demonstrate several consequential limitations.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2012, vol. 37, n°. 7, p. 774-789, nombre de pages : 16, Références bibliographiques : 3 p.

Date :
2012

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley