Developing environmental standards for abstractions from UK rivers to implement the EU Water Framework Directive

Under the European Union Water Framework Directive, Member States must put in place a river basin planning framework to determine what measures are necessary to maintain and improve the ecological status for all surface water bodies. The governmental organisations legally responsible for implementin...

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Bibliographic Details
Published in:Hydrological Sciences Journal
Main Authors: Acreman, Mike, Dunbar, Michael, Hannaford, Jamie, Mountford, Owen, Wood, Paul, Holmes, Nigel, Cowx, Ian, Noble, Richard, Extence, Chris, Aldrick, John, King, Jackie, Black, Andrew, Crookall, David
Format: Article in Journal/Newspaper
Language:English
Published: 2008
Subjects:
Water Framework Directive
environmental standards
abstraction management
rivers
expert panel
environmental flows
ecohydrology
hydro-ecology
GROUNDWATER-DOMINATED STREAM
MACROINVERTEBRATE COMMUNITY
ATLANTIC SALMON
AQUATIC MACROPHYTES
FLOW REQUIREMENTS
CHALK STREAM
FISH
HABITAT
VARIABILITY
DROUGHT
Atlantic salmon
Online Access:https://discovery.dundee.ac.uk/en/publications/8adb6a65-603e-4e1b-8695-7a1fb3ba46e6
https://doi.org/10.1623/hysj.53.6.1105
Description
Summary:Under the European Union Water Framework Directive, Member States must put in place a river basin planning framework to determine what measures are necessary to maintain and improve the ecological status for all surface water bodies. The governmental organisations legally responsible for implementing the Directive in the UK have recognised that all appropriate river flow regime is fundamental to maintain a healthy river and, as a result, they need to regulate abstractions and effluent discharges and ensure Sufficient water is released From impoundments. This paper reports on the process of producing environmental standards that define the maximum abstraction allowable from UK rivers, to leave sufficient flow to maintain a healthy river ecosystem. As there are currently insufficient data available to determine the relationships between river flow and ecological status empirically, expert knowledge was Captured through a series of workshops at which leading UK freshwater scientists defined maximum levels of river flow regime alteration that would achieve ecological objectives for different river water body types. For the least ecologically sensitive rivers, maximum abstractions in the range 15-35% of the natural flow were proposed, depending on the flow magnitude and time of year. For the most sensitive rivers, the maximum abstraction proposed was in the ran, 7.5-25%. The knowledge was used by the responsible UK authorities to develop environmental standards. The authorities subsequently used the environmental standards to determine regulatory standards that could be implemented within practical constraints and current licensing policies.

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