中文摘要：

冬季北方河流中经常出现冰塞现象,极易诱发凌洪灾害。冰塞厚度是冰情预测工作的重要组成内容,不同冰塞演变过程中的冰厚研究成果尚不完善。借助水槽试验,通过改变水流与冰流量条件,对冰塞的堆积演变过程进行了试验研究。结果表明：冰塞堆积演变存在两种不同的顺序,不同的顺序对应不同的厚度变化过程,形成的冰塞分别是以水力增厚为主和以力学增厚为主。这一研究发现可为冰厚计算公式的选取提供有效的技术支撑。

英文摘要：

Ice jam is a common problem for rivers in cold regions. The ice jam thickness is an importantindicator for ice jam prediction. However,the mechanism of ice jam evolution in the freezing period is stillnot clear. By conducting a series of flume experiments, this phenomenon was studied. Different flow andice conditions were selected to study the frazil ice jam accumulation. Two different accumulation processeswere shown from the study, which corresponding to the two flow conditions. Hydraulic thickening and me-chanically thickening process were discussed separately in the passage, which can support the further re-search on the ice jam evolution.