BEDLOAD TRANSPORT BY TRANSLATION WAVES

The response of a gravel bed reach to imposed steady flows and to gradually varying triangular translation waves is examined, firstly, under equilibrium transport conditions and, secondly, with no bedload inflow. With equilibrium transport no significant differences could be found between the sediment hydrograph associated with the wave and the comparable steady state sediment hydrograph. This result, combined with the observed but small variation in resistance implies that the use of steady state resistance and bedload formulae in a mathematical model of the situation can be justified. With nonequilibrium transport differences occurred between measured nonsteady sediment hydrographs and the comparable steady hydrographs due to a bed response effect. This diminished towards the downstream end of the scour region associated with a wave's passage. Consequently mathematical model performance would be poor when the reach length is less than the scour hole length. /Author/

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Griffiths, G A
  • Sutherland, A J
• Publication Date: 1977-11

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 1279-91
• Serial:
  • Journal of the Hydraulics Division
  • Volume: 103
  • Issue Number: HY11
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Grinders; Hydraulics; Hydrographs; Loads; Mathematical models; Sediments; Steady state
• Uncontrolled Terms: Inflow
• Old TRIS Terms: Bed load; Grinding mills
• Subject Areas: Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00168436
• Record Type: Publication
• Report/Paper Numbers: ASCE 13363 Proceeding
• Files: TRIS
• Created Date: Feb 16 1978 12:00AM