2D stream hydrodynamic, sediment transport and bed morphology model for engineering applications

Jorge D. Abad, Gustavo C. Buscaglia, Marcelo H. Garcia

Research output: Contribution to journalArticle

Abstract

A 2D depth-averaged hydrodynamic, sediment transport and bed morphology model named STREMR HySeD is presented. The depth-averaged sediment transport equations are derived from the 3D dilute, multiphase, flow equations and are incorporated into the hydrodynamic model STREMR. The hydrodynamic model includes a two-equation turbulence model and a correction for the mean flow due to secondary flows. The suspended sediment load can be subdivided into different size classes using the continuum (two-fluid) approach; however, only one bed sediment size is used herein. The validation of the model is presented by comparing the suspended sediment transport module against experimental measurements and analytical solutions for the case of equilibrium sediment-laden in a transition from a rigid bed to a porous bed where re-suspension of sediment is prevented. On the other hand, the bed-load sediment transport and bed evolution numerical results are compared against bed equilibrium experimental results for the case of a meander bend. A sensitivity analysis based on the correction for secondary flow on the mean flow including the effect of secondary flow on bed shear stresses direction as well as the downward acceleration effect due to gravity on transverse bed slopes is performed and discussed. In general, acceptable agreement is found when comparing the numerical results obtained with STREMR HySeD against experimental measurements and analytical solutions.

Original languageEnglish (US)
Pages (from-to)1443-1459
Number of pages17
JournalHydrological Processes
Volume22
Issue number10
DOIs
StatePublished - May 15 2008

Keywords

  • Bed evolution model
  • Bed-load
  • Depth-averaged model
  • Finite volume method
  • River morphodynamics
  • Sediment transport
  • Suspended load

ASJC Scopus subject areas

  • Water Science and Technology

Fingerprint Dive into the research topics of '2D stream hydrodynamic, sediment transport and bed morphology model for engineering applications'. Together they form a unique fingerprint.

  • Cite this