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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