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Ice cover growth-decay proces of pond in cold region

DING Falong，MAO Zeyu
（Department of Hydraulic Engineering，Tsinghua University，Beijing 100084，China）

Abstract： Ice cover thickness is a important characteristic parameter in ice engineering research. The
growth and decay of hydrostatic ice are dictated by radiation balance， atmosphere-ice heat exchange， and
heat flux from water under the ice. To investigate the growth and decay process of static ice and accurately
estimate the thickness of ice cover， a thermodynamic model of ice thickness was presented by analyzing
thermal processes affecting the ice cover evolution. The proposed thermodynamic model was verified by the
observation data of the 8th pond of Qinghuahu Lake in Heilongjiang Province， and the observed vertical
temperature through ice and water were analyzed. The results show that the ice thickness model can accu⁃
rately predict the evolution process of ice thickness. An expression of surface ice temperature with air tem⁃
perature and wind speed is obtained by regression analysis. Ice temperature is affected by air temperature，
and the fluctuation range of ice temperature decreases with the increase of ice depth. During the growth pe⁃
riod，the water body continues to cool down，and with the increase of water depth，the change rate of wa⁃
ter temperature decreases gradually. During the decay period， the rising rate of water temperature is slow
at first and then increases rapidly，and the maximum rate can reach 0.13 ℃/day. The research can provide
reference for the evolution analysis and thickness calculation of static ice in cold region.
Keywords： hydrostatic ice； growth-decay process； ice thickness； analytical model； site observation； ice
temperature；water temperature

（责任编辑：王冰伟）

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