The 28 November 2020 Landslide, Tsunami, and Outburst Flood – A Hazard Cascade Associated With Rapid Deglaciation at Elliot Creek, British Columbia, Canada
The 28 November 2020 Landslide, Tsunami, and Outburst Flood – A Hazard Cascade Associated With Rapid Deglaciation at Elliot Creek, British Columbia, Canada
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DOI：
10.1029/2021gl096716
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发表时间：
2022-02
影响因子：
5.2
通讯作者：
M. Geertsema;B. Menounos;G. Bullard;J. Carrivick;J. Clague;C. Dai;D. Donati;G. Ekstrom;J. Jackson;P. Lynett;M. Pichierri;A. Pon;D. Shugar;D. Stead;J. Del Bel Belluz;P. Friele;I. Giesbrecht;D. Heathfield;T. Millard;S. Nasonova;A. Schaeffer;B. Ward;D. Blaney;E. Blaney;C. Brillon;C. Bunn;W. Floyd;B. Higman;K. Hughes;W. McInnes;K. Mukherjee;M. A. Sharp
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文献类型：
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作者：
M. Geertsema;B. Menounos;G. Bullard;J. Carrivick;J. Clague;C. Dai;D. Donati;G. Ekstrom;J. Jackson;P. Lynett;M. Pichierri;A. Pon;D. Shugar;D. Stead;J. Del Bel Belluz;P. Friele;I. Giesbrecht;D. Heathfield;T. Millard;S. Nasonova;A. Schaeffer;B. Ward;D. Blaney;E. Blaney;C. Brillon;C. Bunn;W. Floyd;B. Higman;K. Hughes;W. McInnes;K. Mukherjee;M. A. Sharp
我们描述和模拟了最近在加拿大不列颠哥伦比亚省南部海岸山脉的一次滑坡、海啸、爆发洪水和沉积物羽流的演变。2020年11月28日，大约1800万立方米的岩石从陡峭的山谷壁下降了1000米，穿过冰川的脚趾，然后进入0.6平方公里的冰川湖，形成了100米高的斜坡。水淹没了湖出口，冲刷了一条10公里长的河道，然后在湖出口下方2平方公里的扇上沉积了碎片。洪水、有机碎屑和细沉积物进入峡湾，形成了60多公里长的沉积物羽流，并在数周内改变了浊度、水温和水化学。溃决的洪水破坏了森林和鲑鱼产卵的栖息地。基于物理的滑坡、海啸和洪水模型提供了事件的实时模拟，可以提高对类似灾害级联及其带来的风险的理解。
We describe and model the evolution of a recent landslide, tsunami, outburst flood, and sediment plume in the southern Coast Mountains, British Columbia, Canada. On November 28, 2020, about 18 million m3 of rock descended 1,000 m from a steep valley wall and traveled across the toe of a glacier before entering a 0.6 km2 glacier lake and producing >100‐m high run‐up. Water overtopped the lake outlet and scoured a 10‐km long channel before depositing debris on a 2‐km2 fan below the lake outlet. Floodwater, organic debris, and fine sediment entered a fjord where it produced a 60+km long sediment plume and altered turbidity, water temperature, and water chemistry for weeks. The outburst flood destroyed forest and salmon spawning habitat. Physically based models of the landslide, tsunami, and flood provide real‐time simulations of the event and can improve understanding of similar hazard cascades and the risk they pose.