Thresholds for channel initiation at road drain outlets

Auteur(s) et Affiliation(s)

TAKKEN, I.

School of Physical Environmental and Mathematical Sciences, Univ. of New South Wales, Canberra, Australie

CROKE, J.

School of Physical Environmental and Mathematical Sciences, Univ. of New South Wales, Canberra, Australie

LANE, P.

School of Forest and Ecosystem Science, Univ., Melbourne, Australie

Description :
In this study the validity and usefulness of channel initiation thresholds for road runoff management has been evaluated using field data from 3 catchments in south-east Australia. Logistic regression using road area and slope gradient shows that both variables contribute significantly to channel initiation in the Albert and Tyers River catchments, while for the Sandy Creek catchment only slope gradient is significant at the 0.05 level. The slope-area thresholds are still considered useful in minimising the risk of gully erosion, especially in forestry areas where it appears most likely that channel initiation occurs during a significant rainfall event immediately following hillslope disturbance or road construction.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2008, vol. 75, n°. 3, p. 257-267, nombre de pages : 11, Références bibliographiques : 35 ref.

Date :
2008

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

Langue :
Anglais