Author(s): George D. Ashton
Linked Author(s): George Ashton
Keywords: No Keywords
Abstract: On the Missouri River, downstream of Oahe Dam, an ice cover forms, accumulates and retreats in response to varying air temperatures, varying and daily peaking discharges of up to 1400 m3/s, and varying water temperatures of the release. Extreme accumulations of this ice in some years have caused flooding due to the increased stage associated with the resistance of the ice cover. A simulation of the accumulation and retreat of the ice cover has been constructed, including the variability of the discharge, water temperature, and air temperatures, and compared and calibrated against available data. A discussion of the various approximations used in the simulation is presented together with an assessment of the improvements that occur when various parts of the simulation are treated in more detail, such as using hourly energy budgets rather than daily averages based on a simple bulk heat transfer coefficient.
Year: 1988