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Debris Flood Assessment and Mitigation Design: Trans-Canada Highway, Alberta

机译：泥石流评估和减灾设计：艾伯塔省跨加拿大高速公路

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This paper provides an overview of the 2013 debris flooding near Canmore, Alberta and the subsequent debris-flood risk assessments and flood protection designs, with special attention given to mitigation design elements along the Trans-Canada Highway. Three-days of heavy rainfall in Alberta, Canada in June 2013 caused extensive flooding in the southwestern portion of the province. Debris floods were prevalent on alluvial fans and caused extensive and long-lasting highway closures, almost completely severing Bow Valley from access from either side. Sediment and debris blocked numerous culverts and bridge underpasses, and choked channels, which led to flow avulsions, bank erosion, and flooded communities and roadways. The province of Alberta, including Alberta Transportation and individual municipalities, responded to the event by initiating studies to systematically identify, prioritize, and assess flood and debris-flood hazards and risks, and to design and implement risk reduction measures that improve resiliency and reduce consequences of future floods. The flood event and subsequent assessments and designs have highlighted three important themes that should be considered when designing culverts, bridges, and flood protection works for highways in mountainous terrain. Each theme is illustrated in the paper with case study examples. 1. Importance of accurately recognizing the hydro-geomorphic process type 2. Benefits of using a risk-based approach to design 3. Importance of recognizing interaction of highways with other elements on fans Each theme is illustrated in the paper with case study examples.
机译：本文概述了2013年艾伯塔省坎莫尔附近的泥石流以及随后的泥石流风险评估和防洪设计，并特别关注了横贯加拿大高速公路的缓解设计要素。 2013年6月，加拿大艾伯塔省经历了三天的大雨，导致该省西南部发生大面积洪水。碎屑洪水泛滥在冲积扇上，造成了广泛而持久的高速公路封闭，几乎完全切断了从任何一侧进入的弓河谷。泥沙和杂物阻塞了许多涵洞和桥梁地下通道，并堵塞了水道，导致水流撕裂，河岸侵蚀以及社区和道路被洪水淹没。阿尔伯塔省，包括阿尔伯塔省交通运输局和各个市镇，通过开展研究来系统地识别，确定优先级并评估洪水和泥石流的危害和风险，并设计和实施减少风险的措施以提高适应力并减少后果，从而对事件做出了回应未来的洪水。洪水事件以及随后的评估和设计突出了在为山区地形的公路设计涵洞，桥梁和防洪工程时应考虑的三个重要主题。本文通过案例研究示例说明了每个主题。 1.准确识别水力-地貌过程类型的重要性2.使用基于风险的方法进行设计的好处3.识别高速公路与风扇上其他元素的相互作用的重要性本文通过案例研究示例说明了每个主题。

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