Abstract
Expeditious processing is required for oil spill accidents in water area since they can cause enormous damage to the local habitat and environment. In cold snowy regions, there are frequent heating oil spill incidents in winter. In addition, oil spill under river-ice cover and its process can hardly be observed. In this study, a series of hydraulic experiments using ice model is performed to investigate oil spill phenomena under ice cover. As the result, it is clarified that spilling speeds become slower and the oil layer becomes thicker compared with the cases with open channel. Moreover, simulation by one dimensional two-layer unsteady flow model is performed and consequently it is revealed that oil spill speed is reproducible with appropriate shear stress at the interface and upstream end conditions.
