Impact of the slope angle of hummocks on the ride-up of finger ice in the Liaohe Estuary |
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| Authors: | KONG Xiangpeng and CHEN Naxin |
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| Institution: | 1.Environmental Science and Engineering College, Dalian Maritime University, Dalian 116026, China2.Mathematics Department, Dalian Maritime University, Dalian 116026, China |
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| Abstract: | The ride-up and pile-up of sea ice have effects on the ice load of marine structure. The ride-up angle is an important parameter to study the process of ride-up and to determine the possibility of the ride-up to occur. Some conclusions about the ride-up angle are drawn based on field-survey data in this paper. Thirty hummocks with full structure, formed by 0.4–1.6 cm ice layers, were investigated in the Liaohe Estuary of the north of Liaodong Bay. After analyzing the cross-sections of the pile-up body, some conclusions on the ride-up angle are reached. The results indicate that whether the ride-up occurs or not is associated with the slope angle of the hummock. If the slope angle is greater than 10.31°, the ride-up can take place. With the development of riding-up and piling-up, if the slope angle increases to 40.0°, the climbing-up process will stop and the drifting ice begins to accumulate in front of the hummock. The climbing process does not continue until a new slope angle, which is less than 28.0°, is formed. Meanwhile, the forming process of hummocks, which are made up of 10.0 cm or 22.0 cm ice layers, is proved to follow the rule. |
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| Keywords: | sea-ice riding-up slope angle the Liaohe Estuary |
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