From Canada’s Largest Landslide to Modern Flood Hazards: Mt. Meager’s Volcano‑Driven Sediment Story

Mount Meager last erupted 2,400 years ago, but today the hazard is the mountain literally falling apart. In this episode, Dr. Jeffrey Zurek (P.Geo) moves downstream with environmental professional Veronica Woodruff to unpack the legacy of the Capricorn Creek landslide—Canada's largest recorded mass wasting event.We explore how 40km of 1940s diking in the Pemberton Valley has complicated modern flood risks, the physics of river aggradation, and why Engineered Log Jams (ELJs) are a vital green-infrastructure solution for stabilizing massive sediment loads. This conversation highlights how community resilience, reforestation (380k trees), and proactive investment can change environmental outcomes before the next high-flow event.Chapters(00:00) Intro: Shifting Focus to Resilience(01:51) Mount Meager & The 2010 Landslide(05:13) What is an "Environmental Professional"?(09:50) The Science of Grants & Funding(13:20) The Lillooet River Watershed(15:45) 1940s Engineering: Straightening the River(18:42) Eyewitnesses & 50M m3 of Debris(23:08) River Evolution: Meanders & Braided Streams(25:45) Aggradation: Why the Riverbed is Rising(29:25) Diking Dilemmas & Seismic Regulations(32:30) Real-time Data: The Rain-to-Town Dashboard(38:00) Volcanic Reforestation & Habitat(44:30) Engineered Log Jams: 92 Jams to Save a Watershed(51:00) Proactive vs. Reactive Spending in Canada(57:22) Blind Drunk: Alcohol & Society(59:17) Science Joke: Flat Earth FearsLinks & ResourcesVeronica's book: "BLIND DRUNK A sober look at our boozy culture"Veronica & Glyn’s Whistler talkSupport: PateronSocials: Bluesky | Instagram | FacebookWhimsical Wavelengths: Deep-dive conversations where a working scientist unpacks how we know what we know, one paper, one idea, or whimsical detour at a time. Hosted by Dr. Jeffrey Zurek (P.Geo).