IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 5: Environmental Hydraulics and Hydrology : Effects of configuration on flow structures and sediment deposition in a concavity zone of flood pla...
Effects of configuration on flow structures and sediment deposition in a concavity zone of flood plain
Author : A. Tominaga 1 and J. Jong 1
In compound rivers, a part of flood plain is sometimes excavated to expand flow crosssectional area to provide good water environment for ecological system. In order to maintain this type of concavity in flood plains, it is necessary to understand the flow structures and sediment deposition. In this study, we investigated three-dimensional flow structures in a concavity zone in a compound open channel experimentally. We focused on the configuration of concavity as a design item and measured the three-dimensional flow structures by using a PIV method. Furthermore, sediment deposition tests were conducted and the relation of flow structures to sediment transport process was considered. The deposition morphology in the concavity zone was affected extremely by the orientation angle of backward-facing step and forward-facing step. The 3-D flow structures were also deformed by the step angle and they correspond well to the characteristic deposition morphology in the concavity zone.
File Size : 534,401 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 5: Environmental Hydraulics and Hydrology
Date Published : 01/07/2011
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