Impacts of Holocene climatic variations on alluvial fan activity below snowpatches in subarctic Québec

Auteurs :
LAFORTUNE, V.
FILION, L.
HÉTU, B.

Description :
In the Lake Guillaume-Delisle area of subarctic Québec, storm-generated alluvial fans have been active sporadically throughout the Holocene. In this study, the AA. propose that the persistence of late-lying snowpatches in fan catchments during Holocene cold episodes promoted alluvial fan activity by lowering the precipitation threshold required to trigger a torential event. This hypothesis was tested by characterizing the depositional processes responsible for alluvial fan formation below snowpatches, and by reconstructing the Holocene alluvial fan activity.


Type de document :
Article de périodique

Source :
Geomorphology (Amsterdam), issn : 0169-555X, 2006, vol. 76, n°. 3-4, p. 375-391, nombre de pages : 17, Collation : Illustration, Références bibliographiques : 61 ref.

Date :
2006

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier