Author(s): D. Milburn; B. G. Krishnappan
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Keywords: No Keywords
Abstract: An intensive field program was conducted just before river-ice breakup at the Hay River, Northwest Territories, Canada in April, 2000, followed by controlled laboratory experiments on Hay River water and sediments in a rotating circular flume at Burlington, Ontario, Canada to better understand the nature of cohesive sediment transport in the Hay River. Results from these earlier studies have shown that the deposition of fine sediment is possible in the shallower portion of the river along the river banks, where the bed shear stress is lower than the critical shear stress for deposition of the Hay River sediment during the winter months. The remobilization and the transverse dispersion of the sediment across the width of the river are attributed as possible causes for the formation of sediment plume just prior to breakup when the bed shear stress exceed the critical shear stress for the erosion. This hypothesis will be tested using a new modelling strategy proposed in this paper.
Year: 2002