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Communication Dans Un Congrès Année : 2011

A new simple integral technique to analyze bedload transport data

F. Métivier
E. Lajeunesse
O Devauchelle
B. Ye
  • Fonction : Auteur

Résumé

We describe a simple technique for the analysis of bed load transport data. The technique rests on a simple Rieman sum of bed load fluxes measured against some control variable (e.g. shear stress, discharge). We apply this technique to both natural and synthetic datasets. The natural dataset comes from the Urumqi river survey in the Chinese Tianshan. The synthetic datasets are produced by modeling bed load transport as a Poisson distribution whose parameter depends on shear stress only. One hundred sets of 30, 100 and 500 measurements are produced for two sets of shear stresses, one without uncertainty and one produced using a lognormal distribution. All together 600 synthetic surveys and corresponding datasets are produced and fitted using the integral method and two other conventional techniques, namely moving averages and binning. When compared to other techniques the integral presents the same efficiency, in terms of recovering the average sediment transport law, but it presents two practical advantages. It is not parametrized and therefore not dependent on the choice of parameters and it can be used for small small samples when other methods fail on natural datasets.

Domaines

Géomorphologie
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Dates et versions

hal-01499812 , version 1 (03-04-2017)

Identifiants

  • HAL Id : hal-01499812 , version 1

Citer

F. Métivier, C. Narteau, E. Lajeunesse, O Devauchelle, Y Liu, et al.. A new simple integral technique to analyze bedload transport data. River, Coastal and Estuarine Morphodynamics, 2011, Beijing, China. pp.378--387. ⟨hal-01499812⟩
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