Accession Number : ADA508824


Title :   A General Formula for Noncohesive Suspended Sediment Transport


Descriptive Note : Journal article


Corporate Author : KYOTO UNIV (JAPAN)


Personal Author(s) : Camenen, Benoit ; Larson, Magnus


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a508824.pdf


Report Date : May 2008


Pagination or Media Count : 14


Abstract : 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.


Descriptors :   *SUSPENDED SEDIMENTS , *FORMULAS(MATHEMATICS) , *SEDIMENT TRANSPORT , VALIDATION , MODELS , DIFFUSIVITY , CURRENTS , PROFILES , VELOCITY , RIVERS , COMPUTER FILES , COASTAL REGIONS , REPRINTS , CONCENTRATION(COMPOSITION)


Subject Categories : Physical and Dynamic Oceanography
      Hydrology, Limnology and Potamology
      Numerical Mathematics


Distribution Statement : APPROVED FOR PUBLIC RELEASE