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.xFull text not available from this repository.
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.
|Programmes:||CEH Topics & Objectives 2009 onwards > 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 onwards > Water > WA Topic 1 - Variability and Change in Water Systems > WA - 1.2 - Quantify variability and departures from natural historical variability in water quality ...
|Additional Keywords:||catchment, ecohydraulics, fish, hydro-ecology, mesohabitat|
|NORA Subject Terms:||Zoology
Ecology and Environment
|Date made live:||21 Dec 2011 12:22|
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