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Copyright of Canadian Journal of Civil Engineering is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Ice jams pose a significant threat to human safety and property and represent one of the most dynamic of river ice processes. A key limitation in the advancement of knowledge of ice jam formation is the lack of quantitative data describing these dynamics, which is essential also for validation of advanced computational models. In this study, an experimental investigation of ice jam formation under steady carrier discharge was undertaken. Thus, unsteady effects were entirely due to the ice jam formation process itself. Quantitative data describing the variation in discharge, ice jam thickness, water level variation, and ice cover progression provides unprecedented data describing the dynamics of ice jam formation. While the processes of ice jam formation are indeed dynamic, the results of this investigation suggest that the analysis of ice jams formed under steady carrier flow conditions may be adequately handled by the usual steady flow ice jam stability relationships. The applicability of the popularly applied wide jam theory approach to modeling ice jams is further supported by this investigation. [ABSTRACT FROM AUTHOR]

Abstract: This paper presents a one-dimensional numerical model for simulating dynamic ice jam formation. The formulation is unique in that a purely Eulerian finite element method is used for both the hydrodynamic and the ice dynamics components of the model. A new constitutive model for determining the internal resistance of moving ice accumulation is formulated, and its suitability is explored based on stress and strain rate data obtained from experimental data describing ice jam formation dynamics. The proposed model is validated with a hypothetical idealized ice jam scenario, for which an analytical solution is available. Additional model validation is achieved using a series of experimental ice jam consolidation events. [Copyright &y& Elsevier]