Conclusions
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1.
The downstream regimen of freezing and the volume of the river flow exert a decisive effect on the magnitude of the backwater due to ice, ΔH3. For a given length of the unfrozen patch, the quantity ΔH3 is directly proportional to the duration of the ice-drift period downstream, and to the magnitude of the discharges through the plant during that period.
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2.
The sharp increase of discharges through the plant, after Sundays, at the beginning of the winter period, as the ice edge approaches the plant, in combination with an unstable regimen of the air temperatures, results in artificial ice drift, ice jams, higher roughness coefficients of the lower surface of the ice, and higher values of ΔH3.
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3.
During the period of stabilization of the ice edge, under negative air temperatures, the nonuniformity and magnitude of the discharges through the plant do not exert an unfavorable influence on the ice regime downstream.
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Additional information
Translated from Gidrotekhnicheskoe Stroitel’stvo, No. 1, pp. 33–35, January, 1970.
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Smelyakova, A.D. The ICE regimen of nonstabilized downstream reaches of hydraulic developments. Hydrotechnical Construction 4, 50–53 (1970). https://doi.org/10.1007/BF02376212
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DOI: https://doi.org/10.1007/BF02376212