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Why AlgaRisk08?
Andrew Wither – Principal Marine Scientist
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Why is it necessary?
The Revised (2006) Bathing Waters Directive has protection of bathers’ health as its main focus.
• Article 2: the purpose of this Directive is to preserve, protect and improve the quality of the environment and to protect human health…
• both cyanobacteria and algae specifically mentioned
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Article 8
• When the bathing water profile indicates a potential for cyanobacterial proliferation, appropriate monitoring shall be carried out to enable timely identification of health risks.
• …..adequate management measures shall be taken immediately to prevent exposure, including information to the public.
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Article 9
• When the bathing water profile indicates a tendency for proliferation of macro-algae and/or marine phytoplankton, investigations shall be undertaken to determine their acceptability and health risks and adequate management measures shall be taken, including information to the public.
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Regulations for England and Wales
The Agency must undertake investigations for macro-algae and marine phytoplankton in accordance with Part 3 of Schedule 3.
Where any bathing water profile indicates a tendency for proliferation of macro-algae or marine phytoplankton, the Agency must undertake investigations at the bathing water to allow adequate management measures to be put in place…..
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What is AlgaRisk08?
• The aim is to develop a pre-operational tool for routine use.
• The two big questions:does it work?will it give value for money?
Based on a ‘zero-funded’ pilot SWAPP undertaken in 2007
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AlgaRisk08 structure
• Earth observation (satellites) to give a picture of bloom formation (PML)
• Numerical models to predict what will happen over the next few days (Met Office)
• Simple stochastic model to apply this to an individual bathing water (EA)
• Applied so far only in parts of SW and NW regions
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