Author(s): Jueyi Sui; Bryan W. Karney; Zhaochu Sun
Linked Author(s): Bryan W. Karney
Keywords: Frazil ice; Ice jam; Froude number; Dimensionless jam thickness; Ice concentration
Abstract: Using field measurements of frazil jams in the Hequ Reach of the Yellow River, this paper discusses the mechanism of evolution of frazil jams. An empirical relationship between ice thickness and hydraulic parameters is established. The critical Froude number from the equilibrium ice jam to the overloaded ice jam is about 0.075, with the dimensionless jam thickness about0.40. Experimental studies were conducted to obtain further insights into characteristic features of the evolution of frazil jams and the dependence of jam evolution on ice concentration. The experimental analysis shows a similar jam evolution to the lower reach of the Hequ Reach. Using 22 groups data of St. Lawrence River, it is found the relationship between the dimensionless thickness of ice jam (hanging dam) and the Froude number of the St. Lawrence River has a similar tendency to those at the Hequ reach.
Year: 2001