Surface-based fractional transport predictor: Deterministic or stochastic

Jennifer G. Duan, Brian D. Barkdoll

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Stochastic bed load transport formulas for nonuniform sediment exist, but most of them do not account for the composition of surface material to predict fractional transport rate. This study transformed a surface-based bed-load transport predictor to a stochastic one by approximating the fluctuation of bed-shear stress with a standard log-normal distribution. The deterministic predictor underpredicts fractional transport rate at low values of bed-shear stress and Reynolds number. The modified stochastic predictor predicts fractional transport rate more accurately and converges to the deterministic one at high shear stresses.

Original languageEnglish (US)
Pages (from-to)350-353
Number of pages4
JournalJournal of Hydraulic Engineering
Issue number3
StatePublished - Mar 2008


  • Bed materials
  • Predictions
  • Sediment transport
  • Shear stress

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology
  • Mechanical Engineering


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