Water Stewardship Information Sources

Citation Goetz, JN, Guthrie, RH, Brenning, A. 2015. Forest Harvesting is associated with increased landslide activity during an extreme rainstorm on Vancouver Island, Canada. Natural Hazards and Earth System Science 15:1311-1330.
Organization University of Waterloo
URL http://www.nat-hazards-earth-syst-sci.net/15/1311/2015/nhess-15-1311-2015.pdf
Abstract/Description or Keywords Safe operations of forest practices in mountainous
regions require effective development planning to mitigate
hazards posed by landslides. British Columbia, Canada, has
for the past 2 decades implemented landslide risk management
policies aimed at reducing the impacts of the forestry
industry on landslides. Consequently, it is required that timber
harvesting sites be evaluated for their potential or existing
impacts on terrain stability. Statistical landslide susceptibility
modelling can enhance this evaluation by geographically
highlighting potential hazardous areas. In addition, these statistical
models can also improve our understanding of regional
landslide controlling factors. The purpose of this research
was to explore the regional effects of forest harvesting
activities, topography, precipitation and geology on landslides
initiated during an extreme rainfall event in November
2006 on Vancouver Island, British Columbia. These effects
were analyzed with a nonparametric statistical method,
the generalized additive model (GAM). Although topography
was the strongest predictor of landslide initiation, low
density forest interpreted as regrowth areas and proximity to
forest service roads were jointly associated with a 6- to 9-fold
increase in the odds of landslide initiation, while accounting
for other environmental confounders. This result highlights
the importance of continuing proper landslide risk management
to control the effects of forest practices on landslide
Information Type article
Regional Watershed Vancouver Island South, Vancouver Island North
Sub-watershed if known
Aquifer #
Project status
Contact Name Richard Guthrie
Contact Email [email protected]