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Supercooled-Water and Frazil-Ice Withdrawal by Lakebed Intakes

Author(s): Steven F. Daly; Robert Ettema

Linked Author(s): Robert Ettema

Keywords: Lakes; Reservoirs; Cold regions; Frazil ice; Water intakes

Abstract: Lakebed water-intakes in cold regions are prone to blockage by frazil ice formed during periods of frigid weather. However, little is known about how buoyant supercooled water and fine-sized crystals of frazil ice can be drawn down to the depths at which lakebed intakes typically are located. This paper shows through estimates of Monin-Obukhov length that wind-induced turbulence is the primary process for dispersing supercooled water and frazil crystals downwards to substantial depths in the U. S. Great Lakes, and that intake-induced current subsequently reinforces that downward dispersion.


Year: 2005

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