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Modeling debris flow hazards for safer zoning

At a Glance

  • 70K

    Debris Flows Modeled

Location
Vancouver Island, British Columbia
Offices

Cowichan Lake North Shore Debris Flow Runout Model

The steep north shore of Cowichan Lake, part of the Cowichan Valley Regional District (CVRD), is home to approximately 1,700 people exposed to varying degrees of debris flow hazards from adjacent slopes. A prior hazard assessment had identified 462 historical landslides in the broader region and led to a recommendation for landslide runout modeling for debris flows and slides to better understand the hazard. CVRD reached out to us to help.

Our team used DebrisFlow Predictor to estimate the extent of debris flow hazards to residents and properties along the north shore. After modeling over 70,000 debris flows in the area, the results defined a credible runout limit of debris flow hazards. We identified properties within and beyond that limit, then provided estimated landslide depths (and, therefore, destructive potential) for properties within the potential runout zone.

CVRD used these results to modify zoning bylaws and identify areas requiring additional geotechnical studies.

At a Glance

  • 70K

    Debris Flows Modeled

Location
Vancouver Island, British Columbia
Offices

Services

Markets

Meet Our Team

Richard Guthrie, Vice President

Geohazard innovation is about designing new, novel, and safe solutions that benefit clients, project teams, and our field of work.

Thad Wasklewicz, Principal, Geohazards and Geomorphology

Collaborating regularly with our communities provides a clear understanding of how we can proactively prepare for future geohazards.

Richard Guthrie

Vice President

Thad Wasklewicz

Principal, Geohazards and Geomorphology

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    Work with passionate people who are experts in their field. Our teams love what they do and are driven by how their work makes an impact on the communities they serve.

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