Limitations of advective transport calculations in rivers

S. G. Wallis, J. R. Manson

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    The results of numerical experiments expose fundamental limitations to the accuracy of solute transport calculations in popular river modelling software such as MIKE11 and QUAL2E. Although unconditionally stable, the implicit Eulerian finite difference schemes used become excessively inaccurate when run with Courant numbers much greater than unity. In contrast, the authors' DISCUS scheme maintains high accuracy at all Courant numbers. It does this by virtue of its Lagrangian nature which recognizes, and is in sympathy with, the physical nature of advection. The adoption of this sort of approach is recommended to all modellers.

    Original languageEnglish
    Title of host publicationProceedings of Environmental and Coastal Hydraulics: Protecting the Aquatic Environment
    Number of pages6
    VolumeB pt 2
    Publication statusPublished - 1997
    Event27th Congress of the International Association of Hydraulic Research - San Francisco, CA, United States
    Duration: 10 Aug 199715 Aug 1997


    Conference27th Congress of the International Association of Hydraulic Research
    Country/TerritoryUnited States
    CitySan Francisco, CA


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