Ice Cover Effects on Stream Flows and Mixing

by Y. Lam Lau, Head; Environmental Hydr. Section, Hydr. Research Div., National Water Research Inst., Canada Centre for Inland Waters, Burlington, Ontario, Canada, L7R 4A6,
Bommanna G. Krishnappan, Research Scientist; Environmental Hydr. Section, Hydr. Research Div., National Water Reseacrch Inst., Canada Centre for Inalnd Waters, Burlington, Ontario, Canada, L7R 4A6,


Serial Information: Journal of the Hydraulics Division, 1981, Vol. 107, Issue 10, Pg. 1225-1242


Document Type: Journal Paper

Errata: (See full record)

Abstract: The distributions of velocity, turbulent eddy, and mass diffusivities were computed for three pairs of free-surface and ice-covered flows using the k-ϵ turbulence model. The flow rate, channel slope, and bottom roughness values were kept the same for each pair of flows and the flow depths were computed. The resulting flow depths for ice-covered flows were 15 to 30 percent higher than the depths for free-surface flows. The computed velocity and eddy viscosity distributions do not follow the conventional logarithmic and parabolic distributions for the whole depth of flow. Concentration distributions resulting from the introduction of a neutrally buoyant tracer were computed for all the flows.

Subject Headings: Velocity distribution | Flow distribution | Channel flow | Ice | Turbulent flow | Eddy (fluid dynamics) | Free surfaces | Streamflow

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