This paper presents findings quantifying the extent to which river ice impacted and eroded banks along the middle segment of the Susitna River, Alaska. Analyses of aerial photography (taken over two, one-year periods) established bank-erosion rates for two reaches of differing morphology (multi-channel; and, single channel). Reconnaissance videos were used to establish the timing of erosion within each one-year period. Whereas the first winter ended with a thermal breakup of the river's ice cover, the second winter ended with the dynamic breakup of the ice cover in both reaches. The relatively low flow rate and weak ice associated with thermal breakup caused no large-scale erosion in the reaches, while the higher flow rates and stronger ice associated with dynamic breakup initiated large-scale bank erosion; up to 61% of bank erosion over a one-year period. Single year erosion values ranged from 10 to 30% of the historical erosion over two 30-yr periods. Analysis of the erosion and ice-scar data along the Middle River suggest the recurrence interval for dynamic ice-breakup is about 5–13 years. During dynamic breakup, ice-laden flows abraded banks, and directly impacted trees and shrubs. Thicker ice covers and ice jam development compounded ice-induced bank erosion in the multi-channel reach compared to the single channel reach.

本文提出的研究结果量化了河冰对阿拉斯加苏西特纳河中段沿岸的影响和侵蚀程度。航空摄影分析（历时两年，历时一年）确定了两种形态不同（多通道；和单通道）的河岸侵蚀率。侦察录像被用来确定每一年内侵蚀的时间。第一个冬季以河流的冰盖热破裂而告终，而第二个冬季以两个河段的冰盖动态破裂而告终。相对较低的流速和与热破碎有关的薄冰不会引起河段的大规模侵蚀，而较高的流速和与动态破碎有关的较强的冰却引发了大规模的河岸侵蚀。一年内高达61％的银行侵蚀。在两个30年的时间里，一年的侵蚀值占历史侵蚀的10％至30％。对中河沿岸侵蚀和冰痕数据的分析表明，动态冰破裂的复发间隔约为5-13年。在动态破坏过程中，满载冰块的流会磨损堤岸，并直接影响树木和灌木丛。与单通道河段相比，多通道河段更厚的冰盖和冰堵发展加剧了冰引起的河岸侵蚀。并直接影响树木和灌木丛。与单通道河段相比，多通道河段中较厚的冰盖和冰堵发展加剧了冰诱发的河岸侵蚀。并直接影响树木和灌木丛。与单通道河段相比，多通道河段更厚的冰盖和冰堵发展加剧了冰引起的河岸侵蚀。