Ice is a ubiquitous water phenomenon in cold area rivers,the change of thickness and water level during ice jam is one the uppermost phenomena in ice jam reach.

• 冰凌是冬季寒冷地区河流上普遍存在的一种水文现象,冰塞期间冰塞厚度和水位变化是冰塞河段最主要的现象之一。