Scale variation of post-glacial sediment yield in Chilliwack Valley, British Columbia

Auteur(s) et Affiliation(s)



Description :
The Holocene volumetric sediment budget is estimated for coarse textured sediments (sand and gravel) in a large, formerly glaciated valley in southwest British Columbia. Erosion is estimated by compiling volumetric loss estimated in digital elevation models (DEMs) of gullied topography and by applying a non-linear diffusion model on planar, undissected hillslopes. Estimates of steepland yield are based on estimates of post-glacial deposition volumes in fans, cones and deltas at the outlets of low-order tributary catchments. Results are classed by catchment order and compared across scales of contributing area. A simple network routing model emphasizes the significant sediment flux contributions from colluvium, drift blankets and gullies in steeper terrain.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2011, vol. 36, n°. 2, p. 229-243, nombre de pages : 15, Références bibliographiques : 60 ref.

Date :
2011

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