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Hydraulic-habitat modelling for setting environmental river flow needs for salmonids

Dunbar, M.J.; Alfredsen, K.; Harby, A.. 2012 Hydraulic-habitat modelling for setting environmental river flow needs for salmonids. Fisheries Management and Ecology, 19 (6). 500-517. 10.1111/j.1365-2400.2011.00825.x

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Abstract/Summary

There is an increasing demand for tools to assist in the management of environmental flows in rivers. Changes in river discharge act on biota through a hydraulic template which is mediated by channel morphology. Hence environmental flow assessments also need to consider channel morphology, especially if morphology has been altered by human activities. Computer models describing the preferences of fish for hydraulic microhabitats have been applied to environmental flow problems since the mid 1970s. Salmonids have been a particular focus for these methods. Other reviews have provided comprehensive coverage of the basic features and principles of such models. These are briefly discussed before focusing on developments that have occurred in the last 15 years and whose application has so far been infrequent. These include improvements to the representation of hydraulics at reach-scale and of longer river sections, and improved representation of interacting physical variables that describe habitat. The central theme is the spatial coverage and fundamental granularity of such models. Despite a broad literature, there is a lack of documented examples of the application of hydraulic-habitat models through all stages in the environmental flow decision-making process. The review concludes with four short examples which illustrate the use of model output.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1111/j.1365-2400.2011.00825.x
Programmes: CEH Topics & Objectives 2009 - 2012 > Water > WA Topic 3 - Science for Water Management > WA - 3.4 - Develop novel and improved methods to enable the sustainable management of freshwaters and wetlands
CEH Topics & Objectives 2009 - 2012 > Water > WA Topic 1 - Variability and Change in Water Systems > WA - 1.2 - Quantify variability and departures from natural historical variability in water quality ...
CEH Sections: Acreman
ISSN: 0969-997X
Additional Keywords: catchment, ecohydraulics, fish, hydro-ecology, mesohabitat
NORA Subject Terms: Zoology
Ecology and Environment
Hydrology
Date made live: 21 Dec 2011 12:22
URI: http://nora.nerc.ac.uk/id/eprint/15674

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