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|Title:||Arching of fragmented ice covers|
|Authors:||Calkins, Darryl J.|
Ashton, George D.
Ice boom concept
|Publisher:||Cold Regions Research and Engineering Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 222.|
Abstract: A study of arching by fragmented ice floes across a gap in a surface obstacle is reported. The study included several series of experiments in a hydraulic flume in which simulated ice was released upstream of the surface obstacle at controlled rates and the occurrence or non-occurrence of the formation of a stable arch was observed. The threshold of arching was found to correlate well as a function of the supply rate of surface area of ice, the exit ice surface discharge at the gap, and the ratio of individual floe size to gap dimension. In a series of corollary experiments an arch, once formed, was subjected to a disturbance in the form of a vertical rod traversed longitudinally through the accumulation in the upstream direction. The quantity of ice released and the rate of release prior to another arch re-forming was determined.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Special Report|
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|SR-222.pdf||4.99 MB||Adobe PDF|