Thresholds for channel initiation at road drain outlets
I Takken, J Croke, P Lane
CATENA | ELSEVIER | Published : 2008
Slope-Area relationships have been widely used to identify channel initiation points in the landscape. More recently, the importance of road-related rill and gully erosion has been highlighted. Previous studies indicate that channel initiation at road drain outlets can be predicted from the contributing road area and hillslope gradient at the drain outlet. In this study the validity and usefulness of channel initiation thresholds for road runoff management has been evaluated using field data from three catchments in south-east Australia. None of these catchments show a clear separation between channelised and non-channelised sites based on contributing road area and hillslope gradient. Many ..View full abstract
Awarded by Australian Research Council SPIRT
This work was funded by the Australian Research Council SPIRT Grant C100107032, the Victorian Department of Sustainability and Environment, Parks and Forests Division, and State Forests NSW. Hancocks Victorian Plantations and State Forests NSW supported field work in their catchments. The authors would also like to thank Simon Mockler, Jim Brophy and Phill McKenna for their assistance in field data collection. Peter Fogarty compiled geologic and soil information.