Sustaining water-related ecosystems-the role of in-stream bedform design in river channel rehabilitation

Nicholas J. Clifford*, Philip J. Soar, Joanne C. Emery, Angela M. Gurnell, Geoffrey E. Petts

*Corresponding author for this work

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

    Abstract

    This paper explores the role of riffle-pool bedforms in functional eco-hydraulic river rehabilitation designs and addresses the need for quantitative means of generalizing flow behaviour. Riffle hydraulic performance is modelled using a cross-sectionally disaggregated form of broad crested weir equation. For a given channel reach, geostatistical analysis of mapped flow velocity at contrasting flow stages is then used to identify coherent flow behaviour which might be related to channel bedform morphology and hydraulic function. Finally, observed and inferred flow characteristics are reviewed against the data requirements of habitat simulation models and with respect to the application flow simulation modelling. By coupling morphology, flow characterization and habitat modelling, the aim is to provide a simple, but scientifically sound approach for assessing the ecohydraulic performance of channel bedforms to improve both project design and post-project audit of rehabilitation schemes.

    Original languageEnglish
    Title of host publicationFRIEND 2002 - Regional Hydrology: Bridging the Gap Between Research and Practice
    Subtitle of host publicationProceedings of the Fourth International FRIEND Conference held at Cape Town, South Africa, March 2002
    EditorsHenny A. J. van Lanen, Siegfried Demuth
    PublisherInternational Association of Hydrological Sciences
    Pages407-416
    Number of pages10
    ISBN (Print)9781901502817
    Publication statusPublished - 1 Mar 2002

    Publication series

    NameIAHS Red Book Series
    Volume274
    ISSN (Print)0144-7815

    Keywords

    • Eco-hydraulics
    • Flow modelling
    • Geostatistics
    • Physical habitat simulation
    • Riffle-pool bedforms
    • River rehabilitation

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