Water Stewardship Information Sources
| Citation | Rollerson, T.P., B. Thompson, and T.H. Millard. 1997. Identification of coastal British Columbia terrain susceptible to debris flows. In: 1st intl. conf. debris-flow hazards mitigation: mechanics, prediction, and assessment. 7-9 Aug. 1997, San Francisco, Calif. C.L. Chen (editor). Am. Soc. Civil Engineers, and USGS, New York, N.Y., pp. 484-495. |
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| Organization | FLNRO |
| URL | https://www.for.gov.bc.ca/hfd/library/ffip/Rollerson_T1997.pdf |
| Abstract/Description or Keywords | Debris flows are common in many areas of the coast of British Columbia (BC), where glacially oversteepened slopes are subjected to high rates of rainfall and snowmelt. Identifying terrain susceptible to debris flows following logging is a critical component of forest land management in BC. This information is used at the planning and operational levels to ensure that environmentally sensitive areas are not damaged. An empirical approach, applied to a representative sample of logged hillslopes within a specific geographical area, is used to quantify the likelihood and frequency of post-logging landslide occurrence. For each map polygon within a sample area, terrain attribute data including slope, slope morphology, surficial material, bedrock type, and the presence or absence of natural and post-logging landslides are recorded. Analysis of the data typically uses non-parametric, univariate or multi-variate statistical tests to identify relationships between landslide frequency or likelihood and terrain attributes. In this paper data collected from the west coast of Vancouver Island is analyzed and relationships between terrain attributes and post-logging landslide occurrence are presented. |
| Information Type | conference article |
| Regional Watershed | Vancouver Island North |
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| Comments | |
| Project status | complete |
| Contact Name | Tom Millard |
| Contact Email | [email protected] |