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PORTAIL D'INFORMATION GÉOGRAPHIQUE

Geochemical tracing and spatial evolution of the sediment bed load of the Romaine River, Québec, Canada

Auteur(s) et Affiliation(s)

HARDY, F.
Poly-Géo inc., Québec, St-Lambert, Canada
BARITEAU, L.
Poly-Géo inc., Québec, St-Lambert, Canada
LORRAIN, S.
Environnement Illimité, Montréal, Canada
Hydro-Québec Equipement, Montréal, Canada
GAGNON, G.
Hydro-Québec Equipement, Montréal, Canada
MESSIER, D.
Hydro-Québec Equipement, Montréal, Canada
ROUGERIE, J.-F.
Hydro-Québec Production, Montréal, Canada


Description :
In order to characterise the present river bed load sources, sediment transport and sedimentary connectivity, a study was conducted to document the compositional continuum of the lower 300 km portion of the river. Bed load samples were collected during the late summer low water period and ICP-MS geochemical analyses of the light and heavy mineral portions were conducted. Principal component analysis of the results successfully identified a series of distinctive geochemical domains. Multivariate Euclidean distance coefficients were also calculated between consecutive samples along the river revealing major bed load compositional breaks. These results indicate a longitudinal fractionation of the bed load along the 300 km course of the river. This is further supported by the sedimentary budget calculated from the annual sedimentary input derived from erosion rates of the river banks, from sediment bed load measurements at 3 gauging stations and from calculated bed load transport capacity at these 3 locations.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2010, vol. 81, n°. 1, p. 66-76, nombre de pages : 11, Références bibliographiques : 34 ref.

Date :
2010

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

Langue :
Anglais
Droits :
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