Sediment control in bridge waterways.

Details

• Creators:
  Odgaard, A. Jacob ; Wang, Yalin
• Corporate Contributors:
  Iowa. Highway Division ; Iowa. Highway Research Board
• Subject/TRT Terms:
  • Bridges
  • Waterways
  • Floods
  • Flood damage
  • Flood protection
  • Water control
  • Blades (Machinery)
  • Sediment control
  • Bridges--Flood damage--Iowa--Prevention
  • Blades
• 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
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23277/dot_23277_DS1.pdf
• File Type:
  [PDF - 2.44 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:af3a0e7e4359d6033e90bd037918158ee3bdc01f6be5a16ee077466156908126f80298eb3b09a97e759259ff397d92c0101c914b2b377466ad85855d7115eebf