Abstract
In the cold region Hokkaido, ice problems have occurred in the hydropower station. While we have investigated the river ice frazil and developed the river ice control structure, research on ice formation and behavior on a reservoir where the water level has fluctuated in, have never been performed.In this paper, thickness of the ice cover in a reservoir is discussed from heat balance and ice behavior. From a view point of heat balance, the transition of snow ice thickness on the reservoir during winter period was simulated by a numerical model, considering heat transfer between ice and air, and flow of water, etc. From a view point of ice behavior, by performing a two-dimensional hydraulic model test with simulating reservoir slope, fluctuation of water level, and ice jam condition, ice behavior around slope of this model was observed, and hydrological behavior to study on ice thickness distribution in a reservoir was confirmed.
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