Incipient motion of discrete particles resting on a fixed smooth channel bed is investigated in different conveyance shapes. The results are compared with incipient motion studies in conveyances with movable beds. Higher critical velocities and shear stresses are obtained for smooth rectangular channels than for circular ones, but a single equation for all tested conveyance shapes is derived. The experimental results suggest that for normal sand as well as gravel much lower values of critical velocites are needed to avoid deposition than ususally adopted in sewer design. An analysis of the sediment transport parameter phi and flow parameter psi results in a relationship enabling the computation of sediment concentration C sub v for any conveyance for sediment transport as bed load without tendency for deposition. The results are again compared with similar functions for conveyances with movable beds. /ASCE/

Media Info

  • Features: Figures; References;
  • Pagination: p. 1139-54
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00127220
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11556 Proceeding
  • Files: TRIS
  • Created Date: Jan 14 1976 12:00AM