Sediment Transport Conditions near Culverts

Culvert design requirements have evolved with the ability to analyze the complex hydraulics associated with culvert flow. Simple nomograph solutions have been supplemented with comprehensive software, such as HY-8 and HEC-RAS, and tools to evaluate fish passage, such as FishXing. Designing culverts solely for clear water solutions is insufficient. Sustainable culvert design must allow for the natural transport of sediment associated with fluvial systems through culverts. Such processes are still poorly understood. Unique design steps that consider sediment movement have been developed by the United States Forest Service, titled Stream Simulation, and by the Federal Highway Administration, titled the HEC-26. Each design criterion seeks to fulfill the same purpose: provide for the hydraulic requirements, natural sediment movement, and the passage of aquatic organisms. The stream simulation design is based on channel dimensions while the HEC-26 is founded on hydrologic and hydraulic calculations of design flows through the culvert barrel. Both culvert design schemes call for culvert embedment and require that substrate within the barrel remains stable under design discharges. The purpose of this paper is to demonstrate that sediment "throughput" in an actual culvert depends upon discharge and to describe a new field and modeling campaign in this area.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 1402-1411
  • Monograph Title: World Environmental and Water Resources Congress 2014: Water without Borders

Subject/Index Terms

Filing Info

  • Accession Number: 01528496
  • Record Type: Publication
  • ISBN: 9780784413548
  • Files: TRIS, ASCE
  • Created Date: May 30 2014 3:02PM