Sediment control in bridge waterways.

Details

• Creators:
  Odgaard, A. Jacob ; Wang, Yalin
• Corporate Contributors:
  Iowa. Highway Division ; Iowa. Highway Research Board
• Subject/TRT Terms:
  Blades Blades (Machinery) Bridges Bridges--Flood Damage--Iowa--Prevention Flood Damage Flood Protection Floods Sediment Control Water Control Waterways
• Publication/ Report Number:
  IIHR Report No. 336
• Resource Type:
  Tech Report
• Geographical Coverage:
  Iowa
• Corporate Publisher:
  Iowa Institute of Hydraulic Research
• Abstract:
  The objective of this study was to develop guidelines for use of the Iowa Vanes
  
  technique for sediment control in bridge waterways. Iowa Vanes are small flow-training
  
  structures (foils) designed to modify the near-bed flow pattern and redistribute flow and
  
  sediment transport within the channel cross section. The structures are installed at an angle
  
  of attack of 15 - 25' with the flow, and their initial height is 0.2 - 0.5 times water depth at
  
  design stage. The vanes function by generating secondary circulation in the flow. The circulation
  
  alters magnitude and direction of the bed shear stress and causes a reduction in
  
  velocity and sediment transport in the vane controlled area. As a result, the river bed
  
  aggrades in the vane controlled area and degrades outside.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:2d9336a945cdabd3e49e122e125f44610f298a9fc04c6b00491d4116006958ac
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23277/dot_23277_DS1.pdf
• File Type:
  [PDF - 2.44 MB ]