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    Watertypegerichte normstelling voor nutrienten in oppervlaktewater

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    Series/Report no.
    RIVM rapport 703715005
    Type
    Report
    Language
    nl
    
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    Title
    Watertypegerichte normstelling voor nutrienten in oppervlaktewater
    Translated Title
    Standard values for nutrients in surface-water bodies
    Publiekssamenvatting
    Critical characteristics have been evaluated indication of the switch from the eutrophic status to the recovered clear-water status. Reduction of the nutrient load or nutrient concentration was assumed to be the only factor of any weight in making this switch. The choice made for the desirable ecological status of the water body in question was the authors'. To safeguard vulnerable downstream waters, values for some cases were calculated; this avoided a "roll on" of high concentrations of upstream waters. The observed critical characteristics were very low, but ascertained in the switch indicated the need to study additional measures to fix recovery. Recovery time is assumed to be long. Additional measures will be necessary in order to establish good ecological conditons.
    Kentallen zijn geevalueerd, die aangeven bij welke waarde van het kental een verandering optreedt van de geeutrofieerde toestand van een watertype naar de heldere gewenste ecologische toestand. Bij het onderzoek is aangenomen dat nutrienten-reductie de enige sturende factor was. De keuze voor een gewenste ecologisch toestand is gemaakt door de auteurs die het betreffende watertype beschreven. Om benedenstroomse kwetsbare wateren te beschermen werden er tevens voor enige gevallen "afwentelingswaarden" berekend. De belangrijkste resultaten zijn weergegeven in een overzichtstabel. De waarden van de kentallen waren in het algemeen zeer laag. Een indicatie om naast nutrientenreductie ook andere aanvullende maatregelen te bestuderen, om sneller herstel te bewerkstelligen.
    Publisher
    Rijksinstituut voor Volksgezondheid en Milieu RIVM
    URI
    http://hdl.handle.net/10029/9283
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