publication . Article . 2009

Debris flow initiation and sediment recharge in gullies

Drew Brayshaw; Marwan A. Hassan;
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  • Published: 28 Feb 2009 Journal: Geomorphology, volume 109, pages 122-131 (issn: 0169-555X, Copyright policy)
  • Publisher: Elsevier BV
Abstract
Landslides that enter gullied low-order drainages can either initiate debris flow or stop, depositing sediment in the channel. This process is one of the most common ways that debris flows initiate, but little attention to date has been paid to evaluating the factors that affect whether or not the initial landslide will become a debris flow or deposit sediment in the channel. Statistically significant parameters that determine whether slope failures become debris flows or act to recharge in-channel sediment are channel gradient, angle of entry of failure into the channel, initial failure volume, and the amount of in-channel stored sediment. Steeper channels, low...
Subjects
free text keywords: Earth-Surface Processes
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