Author(s): Akihiro Tominaga; Jefung Jong; Takuya Sakaki
Linked Author(s): Akihiro Tominaga
Keywords: No Keywords
Abstract: The mechanism of bed deformation around the embayment was investigated at an artificial embayment constructed on one-side of a straight fluvial river. A large sand bar was generated behind a deflector by repeated flood events. Velocity distribution was measured in the river with deformed bed configuration and a numerical simulation was performed to examine the sediment transport mechanism. The features were well predicted by the depth-averaged k-ε model. The effects of a deflector on the flow structure and sediment transport were investigated numerically and experimentally. A deflector placed at the upstream point near the embayment entrance line caused strong deflecting flow into the embayment and generated a wide range of deposition behind the deflector. The sediment transport process was strongly controlled by the deflector setting.
Year: 2009