Author(s): Takaharu Kawai; Shinji Kioka; Takashi Terashima; Takahiro Takeuchi
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Abstract: Since the movement of sea ice in an open channel of an estuary zone in cold regions is so active due to tidal current, the surface of the structure at the zone is likely to suffer the abrasion due to sea ice movement. Once the type of material of the structure is known, the ice velocity, which is influenced by the nature of sea ice as well as pressure perpendicular to the structure become important factors for the estimation of abrasion depth. In the paper, the method for calculating the abrasive zone and depth at the surface of the structure is shown through sample calculations for the 2nd open channel at Lake Saroma using sinusoidal curve and tide at Mombetsu. It is concluded that the roughness coefficients between sea ice and fluid, which represents the nature of sea ice, play an important part in the estimation.
Year: 2008