Author(s): Yuntong She; Faye Hicks; Peter Steffler; Dan Healy
Linked Author(s): Yuntong She, Peter Steffler, Faye Hicks
Keywords: No keywords
Abstract: This paper utilizes River1D model’s new ice jam component to explore the river ice jam dynamics under various flow conditions. The model solves the 1D conservation of mass and momentum equations for water flow and ice motion using finite element method in an uncoupled sequence. A one-seventh power law formulation is used to describe the internal resistance and strain rate relationship of the moving ice accumulation. The model is applied to a series of experimental ice jam consolidation events. Model results are compared with those predicted by a steady ice jam profile model with steady gradually varied flow approximation and MohrCoulomb failure criteria, to evaluate the extent in which unsteadiness and ice motion can affect jam-thickness profile. Ice jams collapsed by various inflow hydrographs are simulated, and the influence of hydrograph shapes on the jam-thickness is examined.
Year: 2008