Abstract Anchor ice can cause significant water level and discharge fluctuations in rivers. This study presents an analysis of anchor ice effects on water level and discharge in the Peace River. Field data collected in two winters from the Peace River are analyzed using a river ice model that include the anchor ice process and effects. The anchor processes considered include the bed elevation change due to anchor ice, the change in discharge due to the mass flux of anchor ice growth and release, and the change in ice-bed roughness due to anchor ice growth and release. The analysis showed that the dominating contributing factor to the water level and discharge fluctuations, i.e. anchor ice waves, by anchor ice is the changing ice-bed roughness. This suggests the need for further studies on developing a formulation on ice-bed roughness. The field data also showed that the anchor ice waves occurred over a longer period towards downstream as the water temperature decreases towards downstream during the freezing period, and the anchor ice wave decays while travelling downstream due to the energy loss, but enhanced by anchor ice waves generated along the way.

中文翻译：

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锚冰对河流水力学的影响

摘要 锚冰会引起河流水位和流量的显着波动。本研究分析了锚冰对和平河水位和流量的影响。使用包括锚冰过程和影响的河冰模型分析了从和平河两个冬天收集的现场数据。所考虑的锚固过程包括锚冰导致的床高变化、锚冰生长和释放的质量通量导致的流量变化以及锚冰生长和释放导致的冰床粗糙度变化。分析表明，锚冰对水位和流量波动的主要影响因素，即锚冰波是冰床粗糙度的变化。这表明需要进一步研究开发关于冰床粗糙度的公式。