Thermal Breakup Predictions on a Regulated Riverby David D. Andres, Alberta Research Council, Civil, Engineering Dep, South Edmonton, Alberta, Canada,
Abstract: The thermal breakup process which occurs on the Peace River in Alberta, Canada is described. A quantitative technique which uses the energy budget to explain the celerity of the breakup front is formulated. The best fit to four years of measured data was achieved when the heat transfer was computed with a surface albedo for water and ice of 55% and 70% respectively, a heat transfer coefficient of 15 and 9 W/m**2- degree C for the water and ice surface respectively, and significant ice melt from atmospheric heat exchange was assumed to occur after the mean daily air temperature rose above minus 5 degree C.
Subject Headings: Rivers and streams | Thermal effects | Heat transfer | Ice | Water surface | Budgets | Surface water | Air temperature | Temperature measurement | North America | Canada | Alberta
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