Documenting catchment suspended sediment sources : problems, approaches and prospects

Auteurs :
COLLINS, A.L.
WALLING, D.E.

Description :
Data collection comprises indirect and direct approaches and an overview is provided. The indirect approach uses a range of techniques to measure or evaluate sediment mobilization. Yet, although recent technological advances in surveying, remote sensing and photogrammetry provide improved resolution of temporal and spatial patterns of catchment erosion, these procedures take no account of source-river connectivity and the uncertainties associated with sediment routing. In contrast, the direct approach attempts to link sediment sources and flux using alternative means. The spatial complexity of sediment mobilization and transfer at the catchment scale necessitates a distributed approach to modelling.


Type de document :
Article de périodique

Source :
Progress in physical geography, issn : 0309-1333, 2004, vol. 28, n°. 2, p. 159-196, nombre de pages : 38, Collation : Illustration, Références bibliographiques : 9 p.

Date :
2004

Editeur :
Pays édition : Royaume-Uni, London, Sage Publications