Chapter
Apr 26, 2012
Predicting Contraction Scour with a 2D Model
Publication: World Environmental and Water Resources Congress 2008: Ahupua'A
Abstract
Contraction scour is often encountered in natural rivers due to channel contraction or river restoration structures. Such scour may be predicted better with multi-dimensional models than 1D models. It has been reported that the 2D depth-averaged model is inadequate for modeling the contraction scour. This study aims to investigate whether other factors may play important roles in the poor performance of 2D models. In the process, an improved prediction using the 2D model is obtained and factors influencing the model prediction are identified. The motivation of the study stems from the fact that a 3D model is too complex and many engineering applications have to rely on 2D models. This study shows that the 2D model is still adequate for predicting the contraction scour.
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© 2008 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Ecological restoration
- Ecosystems
- Engineering fundamentals
- Environmental engineering
- Hydraulic contraction
- Hydraulic engineering
- Hydraulic properties
- Hydraulics
- Models (by type)
- River engineering
- Rivers and streams
- Scour
- Sediment
- Sediment transport
- Structural models
- Three-dimensional models
- Two-dimensional models
- Water and water resources
Authors
Affiliations
Sedimentation and River Hydraulics, Technical Service Center, Bureau of Reclamation, Denver, CO 80225. E-mail: [email protected]
Sedimentation and River Hydraulics, Technical Service Center, Bureau of Reclamation, Denver, CO 80225. E-mail: [email protected]
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.