CGRG Bibliography of Canadian Geomorphology
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Author : Bovis, M.J.; and Dagg, B.R.
Date : 1987
Title : Mechanisms of debris supply to steep channels along Howe Sound, southwest British Columbia.
Publication : Erosion and Sedimentation in the Pacific Rim. Proceedings of the Corvallis Symposium, August 1987. IASH Publication
Issue : 165:
Page(s) : 191-200.
Abstract
The mountain wall which forms the east slope of Howe Sound fjord, near Vancouver, B.C., is deeply dissected by steep creeks, many of which have produced destructive debris torrents over the past twenty years. The fact that high-magnitude torrents have occurred sporadically during rainstorms with only 2-3 year recurrence intervals suggests that, in addition to rainfall runoff, the quantity and stability of debris in the channels, together with large impulsive loads from adjacent slopes, must be taken into account when examining torrent occurrence. Accordingly, research has focused on hillslope processes supplying debris and impulsive loads to the channels, and on the character of the materials involved. Debris supply is examined for selected basins classes as either 'rockslope-dominated' or 'drift-dominated'. Detailed studies of individual basins should provide more insight into the causes of debris torrents here than would rainfall - or runoff-based models derived in other regions.
Bibliography of Canadian Geomorphology