A conceptual model of sediment transport: application to the Avon River Basin in Western Australia
✍ Scribed by Neil R. Viney; Murugesu Sivapalan
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 422 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0885-6087
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✦ Synopsis
This paper deals with the coupling of a sediment modelling algorithm to an existing conceptual model of water and salt ¯uxes (LASCAM). In the model, sediment generation is based on a modi®ed 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 scienti®c issues involved in quantifying the sediment discharge processes in this catchment and presents validation results comparing model predictions with observations of sediment transport at dierent locations in the catchment. The results indicate that despite the strongly non-linear relationship between stream ¯ow 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.