A Laboratory Investigation of the Mechanics and Hydraulics of River Ice Jams by J.C. Tatinclaux, 1976

(1976) A Laboratory Investigation of the Mechanics and Hydraulics of River Ice Jams by J.C. Tatinclaux, 1976. University of Iowa

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Abstract

This report presents experimental results on the conditions of initiation of an ice jam by a simple surface obstruction, on the equilibrium thickness of an ice jam formed by accumulation and submergence of ice floes, and on the compression strength of floating, fragmented ice cover. In the study on ice jam initiation, it was found that the minimum concentration of floes in the opening of the obstruction at which a jam occurs is nearly independent of the ratio of width of constricted passage to channel width, and is proportional to a negative power of the ratio of floe length to width of constricted passage. The coefficient of proportionality and the negative exponent of this power function appear to depend upon the ratio of floe length to floe thickness, and to be strongly affected by the properties of the material of the laboratory floes, in particular by the interparticle friction or cohesive characteristics.