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A general formula for noncohesive suspended sediment transport

In English

Författare

Summary, in English

A simple and robust suspended load transport formula for noncohesive sediment is presented for application to river, estuarine, and coastal environments with the use of depth-averaged models. The formula is based on an exponential profile for the concentration and assumes a constant velocity over depth to simplify the calculations. These assumptions were validated with a large data set, including data with a steady current, wave and current interaction, and breaking waves. The formula has two parameters: the mean sediment diffusivity over depth and the bottom reference concentration. The sediment diffusivity is estimated assuming a linear combination of mixing because of breaking waves and the energy dissipation in the bottom boundary layer from the mean current, waves, or both. The bottom reference concentration is a function of the Shields parameter. Overall, the formula developed in this study yields the best agreement with the compiled data set compared with a number of existing formulas for estimating the suspended load.

Publiceringsår

2008

Språk

Engelska

Sidor

615-627

Publikation/Tidskrift/Serie

Journal of Coastal Research

Volym

24

Issue

3

Dokumenttyp

Artikel i tidskrift

Förlag

Coastal Education and Research Foundation

Ämne

  • Water Engineering

Nyckelord

  • waves
  • breaking waves
  • noncohesive
  • sediment
  • current
  • diffusion parameter
  • reference concentration
  • profile
  • suspended load
  • concentration

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0749-0208