Tracing sediment redistribution across a break in slope using rare earth elements

Auteur(s) et Affiliation(s)

MICHAELIDES, K.

School of Geographical Sciences, Univ., Bristol, Royaume-Uni

IBRAIM, I.

School of Geographical Sciences, Univ., Bristol, Royaume-Uni

NORD, G.

Inst. of Environmental Assessment and Water Research, Consejo Superior de Investigaciones Cientificas (CSIC), Barcelona, Espagne

ESTEVES, M.

Lab. Etude des Transferts en Hydrologie et Environnement, CNRS, Inst. National Polytechnique, IRD, Univ. Joseph Fourier, Grenoble, France

Description :
An erosion experiment was conducted using simulated rainfall within a laboratory slope model. Soil was tagged with 10 rare earth element (REE) oxides as sediment tracers and placed in different locations over the slope and at the end of the experiment REE concentrations were measured in samples collected spatially. A new method was developed to quantify the erosion and deposition depths spatially, the relative source contributions to deposited sediment and the sediment transport distances. Particle-size selectivity over an area of net deposition was also investigated, by combining downslope changes in particle-size distributions with changes in sediment REE composition within a flow pathway. Results and discussion about the potential of using REE for quantifying sediment transport processes.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2010, vol. 35, n°. 5, p. 575-587, nombre de pages : 13, Références bibliographiques : 20 ref.

Date :
2010

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

Langue :
Anglais