A conceptual model of sediment transport: Application to the Avon River Basin in Western Australia

Neil R. Viney, Murugesu Sivapalan

Research output: Contribution to journalConference article

Abstract

This paper deals with the coupling of a sediment modelling algorithm to an existing conceptual model of water and salt fluxes (LASCAM). In the model, sediment generation is based on a modified version of the universal soil loss equation. The sediment transport processes of channel deposition and re-entrainment, and bed degradation are coupled with the existing stream-routing algorithm of LASCAM. The model is applied to the Avon River Basin, a large, dry catchment in Western Australia. The paper highlights some of the scientific issues involved in quantifying the sediment discharge processes in this catchment and presents validation results comparing model predictions with observations of sediment transport at different locations in the catchment. The results indicate that despite the strongly non-linear relationship between stream flow and sediment load, both are predicted well by the model. The model also highlights that in the Avon River Basin, disproportionately more stream sediment is generated in the wheat belt region than in the lower catchment.

Original languageEnglish (US)
Pages (from-to)727-743
Number of pages17
JournalHydrological Processes
Volume13
Issue number5
DOIs
StatePublished - Apr 15 1999
Externally publishedYes
EventProceedings of the 1997 International Congress on Modelling and Simulation, MODSIM-97 - Hobart, Tas., AUS
Duration: Dec 8 1997Dec 11 1997

Keywords

  • Catchment hydrology
  • Conceptual modelling
  • Erosion
  • Sediment transport

ASJC Scopus subject areas

  • Water Science and Technology

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