Geertsema, Marten;
Menounos, Brian;
Bullard, Gemma;
Carrivick, Jonathan;
Clague, John;
Dai, Chunli;
Donati, Davide;
Ekstrom, Goran;
Jackson, Jennifer;
Lynett, Patrick;
Pichierri, Manuele;
Pon, Andy;
Shugar, Dan;
Stead, Doug;
Del Bel Belluz, Justin;
Friele, Pierre;
Giesbrecht, Ian;
Heathfield, Derek;
Millard, Tom;
Nasonova, Sasha;
Schaeffer, Andrew;
Ward, Brent;
Blaney, Darren;
Blaney, Erik;
Brillon, Camille;
Bunn, Chris;
Floyd, William;
Higman, Bretwood;
Hughes, Katie;
McInnes, Will;
Mukherjee, Kriti;
Sharp, Meghan
—
2022-02-14
<p style="margin-top:17px;margin-bottom:17px;text-align:justify;">We describe and model the evolution of a recent landslide and outburst flood in the southern Coast Mountains, British Columbia, Canada. About 18 Mm<sup>3</sup> of rock descended 1000 m from a steep valley wall and traveled across the toe of a glacier before entering a 0.6 km<sup>2</sup> glacier lake and producing a >100-m high wave. Water overtopped the lake outlet and scoured a 10-km long channel before depositing debris on a 2 km<sup>2</sup> fan below the lake outlet. Floodwater, organic detritus, and fine sediment entered a fjord where it produced a 70-km long turbidity current and altered turbidity, water temperature, and water chemistry for weeks. The outburst flood destroyed forest and culturally significant salmon spawning and rearing habitat. Physically based models of the landslide, the displacement wave, and the flood provide real-time simulations of the event and can improve understanding of similar hazard cascades and the risk they pose.</p>
https://creativecommons.org/publicdomain/zero/1.0/
