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Uncertainty in the evaluation of sediment yield from badland areas : Suspended sediment transport estimated in the Araguás catchment (central Spanish Pyrenees)

Updating badlands research

Auteur(s) et Affiliation(s)

REGÜÉS, D.
Pyrenean Inst. of Ecology (CSIC), Zaragoza, Espagne
Dept. of Geography, Univ., Zaragoza, Espagne
Dept. of Geography, Univ., Zaragoza, Espagne
YAIR, A.
Hebrew Univ., Jerusalem, Israel


Description :
Suspended sediment transport is probably the main process in sediment export from badland areas. In the Araguás catchment (central Pyrenees) there is a statistically significant positive linear relationship between maximum discharge and the maximum suspended sediment concentration (SSC). In a study involving sampling during 2 moderate floods (August 2006 and February 2007) in the Araguás catchment it was observed that the mean suspended sediment particle size was significantly greater during the highest SSC conditions. The results showed the great heterogeneity of particle sizes that can affect suspended sediment transport, which is usually estimated from concentration determined from turbidity values obtained using infrared devices and associated with the corresponding discharge value. It is highlighted that the evaluation of sediment yield from badland areas using turbidity values involves significant uncertainty, and quantitative estimates of the errors involved are provided.


Type de document :
Article de monographie

Source :
Catena (Giessen), issn : 0341-8162, 2013, vol. 106, p. 93-100, nombre de pages : 8, Références bibliographiques : 1 p.

Date :
2013

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais
Droits :
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