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Geophysical Monograph Series



  • hydraulic geometry
  • bank vegetation
  • gravel rivers
  • restoration
  • bank strength
  • fluvial processes

Index Terms

  • 1825 Hydrology: Geomorphology: fluvial
  • 1856 Hydrology: River channels
  • 1834 Hydrology: Human impacts
  • 1847 Hydrology: Modeling



Bank Vegetation, Bank Strength, and Application of the University of British Columbia Regime Model to Stream Restoration

R. G. Millar and B. C. Eaton

The University of British Columbia Regime Model (UBCRM) is based on rational regime theory. A feature of the model is that it quantifies the effect of bank vegetation and its effect on channel geometry. Three bank vegetation models can be applied to gravel bed rivers with either noncohesive, cohesive, or composite banks. Simplified dimensionless equations for width and slope derived using the UBCRM are applied to a site on the Coldwater River, British Columbia. Between 1953 and 2003, there were significant land use changes that included riparian and floodplain clearing. The observed widening and steepening can be explained by a reduction in bank strength and that changes in the sediment load, discharge, or grain size do not appear to be significant. Applied correctly, the UBCRM can provide qualitative and quantitative insight into the primary causes of historic disturbance and can serve as an aid in restoration design. Because of the physically based nature of the parameters in the UBCRM, analysis and design are directly linked to fluvial processes including flow resistance, sediment transport, and bank stability.

Citation: Millar, R. G., and B. C. Eaton (2011), Bank vegetation, bank strength, and application of the University of British Columbia Regime Model to stream restoration, in Stream Restoration in Dynamic Fluvial Systems: Scientific Approaches, Analyses, and Tools, Geophys. Monogr. Ser., vol. 194, edited by A. Simon, S. J. Bennett and J. M. Castro, pp. 475–485, AGU, Washington, D. C., doi:10.1029/2010GM000989.

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