MODELING ALLUVIAL CHANNEL BED TRANSIENTS

A mathematical model is devleoped to simulate bed transient formation and propagation in alluvial channels. The model is of the known-discharge type, i.e., within one time step, the water discharge is considered steady. This technique allows for the implicit numerical modeling of bed transient propagation using longer time steps that would otherwise be possible using the conventional sequential routing method. Instability due to ill-posing of the sediment transport function is circumvented by using a power relation between bed material transport and mean flow velocity. Errors in mass conservation due to linearization at the boundary are eliminated by using a nonlinear formulation of the upstream boundary condition. /ASCE/

  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  United States  10017-2398
  • Authors:
    • Ponce, V M
    • Garica, J L
    • Simons, D B
  • Publication Date: 1979-3

Media Info

  • Features: Appendices; Figures; References;
  • Pagination: p. 245-256
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00194394
  • Record Type: Publication
  • Report/Paper Numbers: ASCE 14456 Proceeding
  • Files: TRIS
  • Created Date: Jun 13 1979 12:00AM