Ice jam dynamics and flood forecasting - Hay River, NWT

冰塞动态和洪水预报 - 海河 (Hay River)，西北地区

• 批准号: 305416-2008
• 负责人: Hicks, Faye
• 金额: $ 1.25万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Northern Research Supplement
• 财政年份: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=396332
• 关键词: Ice; jam; dynamics; flood; forecasting

Each year during the spring, river breakup brings the threat of ice jam floods to many of the communities across Canada that are situated around rivers. Breakup ice jams occur when snowmelt swells the stream, and lifts and breaks the ice cover suddenly. The ice pieces may initially be carried along with the snowmelt flow, but often become congested - perhaps at a bridge, at a tight bend in the river, or in amongst islands - and when this happens an ice jam is formed. The streamflow is blocked by this dam of ice, and water levels can rise at rates approaching two to three feet per minute, with virtually no advance warning.

每年春天，河流断裂给加拿大许多位于河流周围的社区带来冰塞洪水的威胁。 当融雪使河流膨胀，并突然抬起和打破冰盖时，就会发生破冰堵塞。 冰块最初可能会随着融雪流沿着流动，但往往会变得拥挤--可能是在桥上，在河流的一个紧弯曲处，或在岛屿之间--当这种情况发生时，就形成了冰塞。 水流被冰坝阻挡，水位可以以每分钟2到3英尺的速度上升，几乎没有任何预警。